First Aid: Grinders & Scales

Hand grinder with external adjustment. According to 1Zpresso, it is ready to use straight away.

1. Open the folding crank: hold it close to the wooden knob, push it in and turn it anticlockwise as far as it will go.
2. Check the zero point: turn the adjustment ring anticlockwise until the crank only turns with resistance. If the pointer is then at 0, the grinder is calibrated.
3. Grind size: a higher number is coarser; 100 clicks per rotation, 0.02 mm per click. Starting values: espresso 3.0–4.5, AeroPress and moka 5.0–7.0, pour over 8.0–9.0, French press 9.0–10.0.
4. Do not grind in the first few clicks from zero, as the burrs can touch there. Never overturn the adjustment dial.

Important: Do not disassemble the shaft, grinding ring, adjustment ring and bearings any further. Do not disassemble the folding crank, otherwise the warranty on the crank is void.

Manufacturer’s manual: K-Ultra User Manual (English) · Cleaning instructions (English)

1. Charging via USB-C (5 V): Lunar and Pearl take 1–2 hours from empty to full, the Pearl Model S 3–4 hours. Do not let the battery run completely flat. If the scale is hot from brewing, it only charges once it has cooled down.
2. Place it on a stable, vibration-free surface and put weights in the centre.
3. Operation: pressing Power switches it on, tapping twice switches it off, T tares, holding Power changes the mode. The modes can be switched on and off individually in the settings.
4. Calibration is not necessary out of the box. If there are deviations: weighing mode, unit grams, tap T quickly until “CAL” appears, place the calibration weight (for example 100 g) in the centre and wait for “_End_”.
5. App and firmware: Bluetooth is on at the factory. Firmware updates run via the Acaia Updater app; the scale only holds one app connection at a time.

Important: According to Acaia, error 303 means that the load cell has probably been damaged by overloading or a fall. In that case, get in touch with us.

Manufacturer’s manual: Lunar user manual (German, PDF) · Pearl user manual (German, PDF) · Pearl Model S user guide (German, PDF)

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Hand grinder with Nitro Blade burrs. It is set to 24 clicks at the factory.

1. Pull off the magnetic crank, fill in beans (the Bean Jars hold 40 g each) and put the crank back on.
2. Only adjust the grind size with no coffee in the burrs: turn the three-winged adjuster at the bottom while holding the crank and body with your other hand.
3. Zero point: hold the grinder horizontally. With the burrs open, the crank drops. When closing step by step, “click 0” is the first step at which the crank no longer drops.
4. From 0, count the clicks anticlockwise; more clicks are coarser. Starting values according to Comandante: espresso 7–13, moka 14–20, pour over 18–35, French press 25–35. Start in the middle of the range.

Important: Never loosen the three screws at the bottom of the burr ring; they calibrate the burrs. Only brush the C40 dry; according to Comandante, only the Bean Jars may be cleaned with water.

Manufacturer’s manual: C40 MK4 user manual (German, PDF) · Comandante FAQ (English)

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Single-dose grinder with 65 mm burrs.

1. Insert the bean container so that it lines up with the screw at the back, and tighten the fixing screw.
2. Grind size: turn the knob clockwise for finer, anticlockwise for coarser. Adjust in small steps and grind a little coffee about every 2 marks; a full turn with the motor stopped can block the grinder.
3. Weigh the beans and fill them in with the flap closed. Place the anti-chaff funnel on the cup and hold it to the spout.
4. Start with the side button, then open the flap. When the last bean is in the grinding chamber, close the flap again.
5. When nothing more comes out, press the bellows on the container until the grinding chamber is empty.

Important: A maximum of 160 g per grinding cycle. If a foreign object blocks the motor, switch off immediately and get in touch with us.

Manufacturer’s manual: Mignon Single Dose PRO manual (German and other languages, PDF) · Best Practice (English, PDF)

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Espresso grinders with timed dosing; the SMART also has a grind size sensor.

1. Align the bean container with the screw at the back and tighten the locking screw; only then put the grinder into operation. Close the flap, fill in beans, put the lid on, open the flap.
2. Adjust the height of the portafilter fork to your portafilter and screw it tight again.
3. Switching on: the first time, the factory settings are active. Choose single or double dose and set the grinding time in seconds with −/+; use a scale to check how long your dose takes.
4. Grind size: knob clockwise for finer, anticlockwise for coarser, in small steps. On the SMART, the grind size is set to 30 at the factory, which is in the espresso range; only adjust by more than ±5 points with the motor running.
5. SMART: if the extraction time is more than 3 seconds off your target, press the SMART button, enter the target and actual times and set the suggested value.

Important: A maximum of 160 g per grinding cycle. If a foreign object blocks the motor, switch off immediately and get in touch with us.

Manufacturer’s manual: Mignon manual (German and other languages, PDF) · Mignon Specialità SMART manual (German and other languages, PDF)

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Hand grinders with stepless adjustment.

1. Fitting the crank: loosen the locking screw or lock nut, put the crank on and tighten it firmly again.
2. Adjusting: loosen the locking screw, turn the adjustment nut clockwise for finer, anticlockwise for coarser, then tighten the locking screw firmly again, otherwise the setting will shift while grinding.
3. M47: in the English manual, Kinu gives 1½ turns as a starting point, then adjust to taste. Kinu leaves the reference point open; as we read it, it is the finest setting. 50 marks per turn, 0.01 mm each.
4. Traveler: 0.0.0 is the adjustment nut turned clockwise to the stop; it is set to 1.0.0 at the factory. Starting ranges: espresso 1.0.0–1.5.0, moka 1.5.0–1.8.0, filter 2.5.0–3.5.0.
5. When grinding, hold the grinder at the top and put your thumb on the stopper. Do not grind at the zero point.

Important: Do not remove the grinding ring; according to the Traveler manual, only the factory does this, and trying it yourself costs you the warranty.

Manufacturer’s manual: M47 Classic manual (English/German, PDF) · Traveler manual (English/German, PDF)

Espresso grinder with dosing buttons, optionally with app and grind-by-weight.

1. Plug the power cable in at the bottom of the grinder, stand the grinder upright and insert the catch tray.
2. Insert the portafilter fork into the two slots and adjust the height so that your portafilter is held in place.
3. Put the bean hopper on in the “open” position and turn it clockwise to “closed”. Fill in beans, put the lid on, open the slide. The Pico will not grind unless the hopper is seated correctly.
4. When using it for the first time, grind through about 300 g of coffee and do not use the first doses; then clean the inside of the chute with a soft, dry brush.
5. Grind size: a smaller number is finer. After an adjustment, grind through a few grams. You set the dose via the grinding time (hold the button for 2 seconds, adjust with +/−, OK).

Important: According to the rating plate, grind for 20 seconds, then pause for 300 seconds; if it overheats, the motor protection switches off. No damp cloths in the grinding chamber and chute; never immerse in water.

Manufacturer’s manual: Pico Quick Start Guide (English, PDF) · Pico Operating Manual (English/French, PDF)

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Espresso grinder with grind-by-weight and Sync app. A Startup Wizard guides you through the setup when you first switch it on.

1. Only lift it by the housing with both hands, never by the portafilter rest or holder. Place it on a level, vibration-free surface; this is important for the scale. Slight coffee residues come from the factory test.
2. Insert the bean hopper (slide all the way out, put the hopper on, slide in to the mark, then all the way in), click the spout into place, insert the catch tray.
3. Adjust the portafilter rest to your portafilter: loosen both screws, insert the portafilter, push the rest up, tighten the screws. Then align the spout so that the ground coffee falls in the centre.
4. Switch on. The Startup Wizard guides you through name, Wi-Fi/cloud and the first recipe. Two recipes are set at the factory: Single Shot 12 g and Double Shot 18 g, both at 50 µm.
5. As soon as the grinder is in its place, calibrate the load cell with a reference weight in the “Service” → “Calibrate” menu. Grinding: choose a recipe, push in the portafilter, and grinding starts automatically.
6. Wi-Fi and app: “E64 WiFi & Cloud Setup” in the menu, then scan the QR code with the Mahlkönig Sync App. The grinder only connects to 2.4 GHz Wi-Fi.

Important: According to Mahlkönig, grind for a maximum of 6 seconds, then pause for 54 seconds, and a maximum of 2.5 kg per day. If the overcurrent circuit breaker trips: switch off, press the reset button in, switch on again; if it trips repeatedly, get in touch with us. In the web interface, only run the firmware update; according to Mahlkönig, everything else is reserved for technicians. Do not immerse, no compressed air, do not open the housing.

Manufacturer’s manual: E64 WS operating manual (German, PDF) · E64 WS Software Manual (English, PDF)

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All-round grinder for espresso and filter, with timed recipes.

1. Unpack it with both hands on the body. Before first use, wipe the bean hopper with a damp cloth and dry it, then grind a small portion of beans for about 5 seconds; this removes residues from production.
2. Inserting the bean hopper: pull the hopper slide all the way out, set the hopper with its lug into the recess, press it down, push the slide in to the mark, then all the way in (open). Only then fill in beans.
3. Choose the module: portafilter module (starts via the portafilter switch) or container module for filter. Adjust the portafilter module to your portafilter beforehand.
4. Switching on: switch at the back to 0, plug in, then switch to I. Factory recipe settings: 1 = 6 s (one cup of filter), 2 = 30 s (about 1 litre), 3 = 20 s (double shot), 4 = 10 s (single shot).
5. Grind size with the adjustment wheel on the side, 01 fine to 35 coarse. Guide values according to Mahlkönig: espresso 01–05, café crème 05–15, filter 15–25, French press above 25. Only go finer with the grinder running.

Important: According to the technical data, grind for a maximum of 10 seconds, then pause for 50 seconds, and a maximum of 1.7 kg per day; factory recipes 2 and 3 run longer, so let the grinder rest afterwards. Never force the setting from coarse to fine when beans are blocking the burrs; the adjustment lever or burr housing can break. Start first, then adjust finer. Clean the burrs with cleaning tablets as shown in the manual; according to Mahlkönig, only trained specialists open the grinder. Unplug before any cleaning.

Manufacturer’s manual: X54 operating manual (German, PDF)

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Single-dose grinder for home use.

1. Lift it out of the box with both hands, by the grinder body only. Place it on a level, stable, dry surface.
2. Push the spout into the holder from below until it clicks into place, then insert the catch tray at the front; it is held magnetically. Choose an attachment: anti-popcorning attachment for small amounts, hopper extension for larger ones, bellows for blowing out residues.
3. Before first use: the grinder was tested with coffee at the factory. Grind a small portion of beans, then put on the bellows and pump several times until the hopper and burrs are clear.
4. Grind size with the adjustment wheel on the side: clockwise for coarser, anticlockwise for finer. The espresso, filter and cold brew ranges are printed on the scale. Larger jumps only with the motor running.
5. Weigh the beans, fill them in, put the cup under the spout and press START/STOP. When changing beans, blow out the remaining grounds with the bellows.

Important: According to Mahlkönig, grind for a maximum of 6 seconds, then pause for 54 seconds, and a maximum of 2.5 kg per day. Never immerse in water, no compressed air. Do not open the housing, otherwise liability and warranty are void.

Manufacturer’s manual: X64 SD operating manual (German, PDF) · X64 SD Quick Guide (English, PDF)

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Single-dose grinder with 64 mm flat burrs.

1. Check the packaging and grinder for damage. Place it on a stable, level surface and level it using the four feet. Only connect it to an earthed socket, without an extension cable.
2. Clean it before first use (manual, chapter 7) and do not use the first doses; according to the Mazzer FAQ, throw away the first 50 g of coffee.
3. Weigh the beans (up to about 60 g), open the slide, fill them in, put the lid on. Place the canister under the outlet; magnets pull it into position.
4. Grind size: a higher number is coarser; if possible, adjust without coffee between the burrs. Guide values: espresso 10–40, moka 50–80, filter 80–120.
5. Switch to “I”. When everything is ground, pull and release the knocker several times, then switch to “0”. For low retention, insert the Dose Finisher into the outlet with the motor running and turn it.

Important: The burrs must never touch while the motor is running. A maximum of 2 kg of coffee per day. The manual advises against spraying the beans with water; the Mazzer FAQ takes a more relaxed view. According to the manual, the zero point is adjusted by trained specialists; according to the Mazzer FAQ, you can also calibrate it yourself, as shown in the video.

Manufacturer’s manual: Philos Instruction Manual (English) · Mazzer Help & FAQ (English)

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98 or 102 mm flat burrs, zero point calibrated at the factory, with a lock.

1. The power socket is on the underside: plug the cable in at the base plate before the grinder goes on the table.
2. Grind size: clockwise for finer; one mark (0.1) corresponds to 7.5 µm. Recalibrating is not a routine task.
3. Starting values at speed level 6 (about 1130 RPM): SSP 102 High Uniformity espresso +1.0–1.5, pour over +6.5–7; Mizen 98OM espresso +1.0–1.5, pour over +6.5–7.5; Mizen 102OM espresso +1.0–2.5, pour over +6.5–7.5.
4. Press the Auto button once; the Manual switch stays off. A double click starts the quick cleaning. After transport, re-teach the sensor: hold the Auto button for about 10 seconds.
5. Place the cup on the magnetic platform; after grinding, briefly press the outlet down and release it.

Important: An incorrect zero calibration can damage the grinder and is not covered by the warranty. Do not open the base plate.

Manufacturer’s manual: Quick Start Guide (English, PDF) · User Guide (English)

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Conical burrs with Auto-Grind, calibrated at the factory.

1. Place it on a dry, level surface, not in direct sunlight. Do not run any other high-power appliance on the same circuit.
2. Grind size: clockwise for finer, anticlockwise for coarser, stepless. Zero point: turn clockwise until the burrs lock. Only recalibrate when changing the burrs.
3. Starting values with the 65CL burrs: espresso +8 from zero, pour over/V60 +15 from zero, then adjust to taste.
4. Auto-Grind: press the button once; the Casa starts and stops by itself. If it no longer detects the end (for example after transport), empty the hopper and hold the button for about 10 seconds until the motor starts.
5. At the end, press the outlet down and release it quickly (clicker).

Important: A maximum of 90 seconds at a time, then a 90-second pause. Do not open the base plate, otherwise the warranty is void. Option-O recommends the tool-free cleaning every 6–12 months.

Manufacturer’s manual: Quick Start Guide (English, PDF) · User Guide (English)

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Compact conical grinder powered via USB-C.

1. Power via USB-C Power Delivery (20 V, up to 100 W): use a 100 W PD power supply or a suitable power bank.
2. Zero point with the motor switched off: turn clockwise until the burrs lock. One full turn corresponds to +10.
3. Starting values with the 48MS burrs: espresso +8, pour over +15 from zero.
4. Before first use, calibrate the auto mode: hopper empty, switch on, hold the switch for about 5 seconds until the motor stops.
5. Auto-Grind: press the button once; the grinder starts and stops by itself.

Important: A maximum of 90 seconds at a time, then a 90-second pause. If it runs for more than 6 minutes in total, the protection forces a 30-minute pause.

Manufacturer’s manual: Quick Start Guide (English, PDF) · User Guide (English)

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64 mm flat burrs. Every P64 is tested with coffee at the factory, so a few residues in a new grinder are normal.

1. Only operate it with the hopper fully assembled.
2. The zero point is calibrated at the factory. Since August 2022, the P64 has a lock against turning below zero; for older units, determine the zero point following Option-O’s video.
3. Starting values depend on the burrs, according to the Quick Start Guide, for example Mizen 64 OM: espresso +0.5–1.5 at level 7, pour over +5–6 at level 3; SSP High Uniformity: espresso +0.9–1.5 at level 4.
4. The speed control 1–9 corresponds to about 200–1400 RPM. After changing the speed, readjust the grind size slightly.
5. During the first grind, up to about 0.5 g can remain in the grinder; it does not come out later as stale coffee. Against static: 1–3 sprays of water for 18 g.

Important: A maximum of 90 seconds at a time, then a 90-second pause. Do not open the base, otherwise the warranty is void.

Manufacturer’s manual: Quick Start Guide (English, PDF) · User Guide (English)

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80 mm flat burrs, zero point calibrated at the factory, with a zero limiter.

1. Dry, level surface, no power adapter, no other high-power appliance on the same circuit.
2. Grind size: clockwise for finer; one mark (0.1) corresponds to 0.01 mm. The zero limiter prevents you from turning below zero.
3. Starting values: espresso 1.0–1.5 at 1100 RPM, pour over 4.5–6.0 at 600 RPM.
4. Auto-Grind: press the Auto button once; the Manual switch stays off. A double click starts the purge. After transport, re-teach the torque sensor: hold the Auto button for about 10 seconds.
5. Adjust finer with the motor running. At the end of grinding, use the clicker on the outlet.

Important: New burrs that are not yet seasoned can clog if the setting is too fine. Do not disassemble further than described, otherwise the warranty is void.

Manufacturer’s manual: Quick Start Guide (English, PDF) · User Guide (English)

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Coffee scales, calibrated at the factory.

1. Before first use, charge via USB-C with a 5 V power supply (1–2 A), no fast chargers. Do not weigh while charging.
2. Place it on a stable, vibration-free surface and use the silicone pad as heat protection.
3. Basic 3: switch on with the slide switch; sliding it towards “M” switches between Regular, Pourover and Espresso. Basic 2 and Mini: pressing Power/Tare switches on, a short press tares, a long press switches off.
4. Mini in espresso mode: put the cup on; the scale tares itself and starts the timer as soon as drops fall.
5. Only calibrate if it actually weighs inaccurately. For the Basic 3 and the Mini, Timemore shows how in a separate video for each. For the Basic 2, we have not found any calibration instructions from Timemore; in that case, get in touch with us.

Important: Do not open them, otherwise the warranty is void. The scales are not legal for trade.

Manufacturer’s manual: Black Mirror Basic 3 (English/German, PDF) · Black Mirror Basic 2 (English/German, PDF) · Black Mirror Mini (English/German, PDF)

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Hand grinders. On all of them, the zero point is the finest setting at the stop. How close to this point you may grind differs from model to model; the limits are listed below.

1. Chestnut S3: fold out the handle and lock it in place, tighten the locking knob at the bottom fully clockwise (it is not a grind size adjuster). Turn the ring clockwise as far as it will go; “0” is then at the red mark. Guide values from 0: espresso 0–1.0, pour over 5.0–8.0.
2. Chestnut C5: according to Timemore, the first 3 clicks serve as a buffer and are the practical zero point. Finest grind setting: 3 (C5 Pro) or 4 (C5 ESP Pro).
3. Chestnut X lite: the dial turned clockwise to the stop is “0”. Guide values: espresso 5–7, pour over 13–16, French press 17–22 clicks. Never grind between 0 and 3 clicks.
4. Chestnut ESP: the dial turned clockwise to the stop is 0 clicks. Guide values: espresso 18–24, moka 26–32, pour over 35–50 clicks. Never grind at 0–10 clicks.
5. Put the lid on before adjusting. Hold the body firmly and turn the crank clockwise.

Important: Timemore advises against disassembling the burrs and internal parts yourself. If you keep turning the dial past the end, the inner burr comes loose.

Manufacturer’s manual: Chestnut S3 manual (English/German, PDF) · Chestnut X lite Manual (English, PDF) · Chestnut ESP manual (German and other languages, PDF)

Electric single-dose grinders with speed control. According to Timemore, the models without “S” are not intended for espresso.

1. Remove the packaging, wipe the housing with a soft, damp cloth and let it dry completely. The rating plate must match your socket; the online manual is the US edition.
2. Place the magnetic container under the outlet; the magnets align it. Before filling, quickly check that there are no foreign objects in the hopper.
3. Grind size: “0” is the reference point; a smaller number is finer. Guide values 078S: espresso 0–5, pour over 12–16; 064S: espresso 1–4, pour over 8–13.
4. Select the speed at the back (078: 800–1400, 064: 800–1200 RPM). According to Timemore, grind light roasts above 1000 RPM, and never go too low with light or hard beans.
5. Switch on, fill in the weighed beans and close the lid. Afterwards, turn the knocker clockwise. The grinder switches off by itself after 60 seconds.

Important: According to Timemore, damage caused by disassembling and reassembling it yourself is not covered by the warranty.

Manufacturer’s manual: Sculptor 078/078S User Manual (English, PDF) · Sculptor 064/064S User Manual (English, PDF)

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Varia ships the VS3 calibrated to “0”.

1. Before grinding for the first time, brush the burrs with the brush and wipe the housing; this removes dust from production. Only operate it with the supplied power supply at an earthed socket.
2. Check the zero point (motor off): lid off, turn the hopper clockwise to the tightest point past “0”, then back to “0”. According to Varia, two or three notches of play past “0” are normal.
3. Grind size: clockwise for finer, anticlockwise for coarser. Starting values according to the manual: espresso 1–3, pour over 6–12, French press 12–15. The Varia help centre gives espresso 4–5 and pour over 9–10. Never grind between 0 and 1.
4. Weigh the beans; the hopper holds about 30 g. At espresso grind size, add light, dense roasts slowly, otherwise the overheating protection stops the grinder.
5. After each grind, pump the bellows a few times. Against static: 2–3 sprays of water on the beans in the cup, never into the grinder.
6. Seasoning: during roughly the first 2 kg, static is higher and the grind size can shift slightly.

Important: Never switch it on when the hopper is fully closed. Grind for a maximum of 60 seconds at a time, then pause for 90 seconds. If it stops with light beans, let it rest for about half an hour instead of restarting it. Never open the bottom cover, otherwise the warranty is void.

Manufacturer’s manual: VS3 User Manual (English, PDF) · Varia help centre VS3 (English)

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53 mm conical burrs, calibrated at the factory. According to Varia, you do not need to recalibrate, not even after cleaning.

1. Remove the foam, tape and cable ties. Without power, check that the hopper and grinding chamber sit flush and that the quick-release ring is locked (mark at the front), otherwise it will not start.
2. The VS4 arrives in the finest setting: the first time, turn the grinding ring firmly anticlockwise towards “1”. The resistance only occurs the first time.
3. Dial to “OFF”, plug in and let it run empty for 5–10 seconds. If it scrapes, switch off immediately. After switching on, it calibrates itself for about 2 seconds, then the motor starts gently.
4. Starting values according to the manual: espresso 2–5, pour over 7–10, French press 10–14. The help centre gives espresso 2–6 and filter 10–16. Never grind between 0 and 1.
5. Speed 150, 200, 250 or 300: start at 200. According to Varia, rather low for filter, 200–250 for espresso.
6. After each grind, turn the dial back to “OFF” and pump the bellows 2–4 times. After 5 minutes without grinding, it goes to sleep: press the dial and wait 2 seconds.

Important: A maximum of 60 seconds at a time, then a 90-second pause. Only clean the inside dry; do not touch the ionisation needle. Never open the lower chamber and the bottom cover, otherwise the warranty is void. During the first 1–2 kg, the grind size can drift.

Manufacturer’s manual: VS4 User Manual (English, PDF) · Varia help centre VS4 (English) · Video tour at Varia (English)

Single-dose grinder with interchangeable burr set (flat or conical) and speeds from 500 to 1600 RPM.

1. Check the voltage on the underside; it must match your socket. No travel adapter, only an earthed socket.
2. Unscrew the hopper anticlockwise and check whether the locking nut on the burr set is tight. Transport can loosen it.
3. Put the hopper on without tilting it: with light pressure, first turn it anticlockwise until it clicks, then screw it in clockwise, on to “0”; that is your zero point. Never switch on in the tightest setting. Put the single-dose attachment on before switching on.
4. Starting values from “0”: espresso 2–5 (help centre: 3), pour over 7–10 (help centre: 9–12). Never grind between 0 and 1.
5. Switching on: press the knob, turn it to set the speed, start at 500. Guide values according to Varia: flat burrs light 700–900, medium 900–1200, dark 1100–1400; conical 200–300 lower.
6. After grinding, use the knocker on the outlet. During roughly the first 2 kg, static is higher.

Error E006 is the overload protection: switch off, let it cool down for 15–30 minutes, check for foreign objects and do not grind extremely fine. Only add light roasts in portions with the grinder running. Never open the bottom cover.

Manufacturer’s manual: VS6 User Manual (English, PDF) · Varia help centre VS6 (English) · Video tour at Varia (English)

Applies to the EG-1 v3. The new EG-1 from October 2026 has a different grinding chamber lid and a zero point that can be calibrated; these steps only partly apply to it.

1. Lift it straight out of the packaging with both hands; it is heavy. The EG-1 runs on 90–240 V.
2. Before switching it on for the first time, remove the upper and lower funnel caps and check that the grinding chamber is clear. Weber seasons every grinder with about 200 g of coffee, so small residues are normal.
3. Put the bean bowl on, plug in and switch on the main switch at the back; the display shows “0”. A speed of 500–700 RPM is a good start.
4. Grind size: set close to an espresso setting at the factory. Lift the locking ring and turn it; a higher number is coarser, one mark is 5 µm. There is no absolute zero point. Do a small test grind first.
5. Weber recommends a “Hot Start”: grinder running, then add the beans to the bowl. 20 g take about 10 seconds. Then use the clicker; the purge button frees trapped beans.

Important: Never operate it without the funnel caps. Clean the grinding chamber briefly with the brush every day; according to Weber, this takes about 30 seconds. Never put parts in the dishwasher.

Manufacturer’s manual: EG-1 Instruction Manual (English, PDF) · EG-1 Quickstart (English)

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83 mm conical burrs. Weber supplies the burrs partially pre-seasoned; they can be used straight from the factory.

1. Unpack it by lifting it straight out with both hands; it is heavy. The Key runs on 100–240 V.
2. The Magic Tumbler is fitted, the WDT wiper is not yet: install it according to the manual and video, and tighten the screw firmly. Without the wiper, Weber recommends one spray of water per dose.
3. Plug in and switch on the main switch at the back. A speed of 50–70 RPM is a good start.
4. Grind size: set to espresso at the factory. Lift the ring and turn it; clockwise is coarser. Then check that the ring sits flush. Never operate it without the adjustment ring.
5. Hot Start: grinder running, then the beans. 20 g take about 20–30 seconds, depending on grind size and speed.

Important: Only open the gearbox cover with the main switch off, otherwise there is a risk of crushing. Switch off the main switch during longer breaks.

Manufacturer’s manual: KEY Instruction Manual (English, PDF) · Quickstart (English, PDF)

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Most common reason: new or older beans — not a defect.

Try this first:

1. Check bean age: the grind size shifts as the beans age. Readjust in small steps by taste.
2. One change per attempt, keeping the dose and the amount in the cup the same by weight. If the espresso runs noticeably fast and doesn't taste good, go one small step finer; if it runs noticeably slowly, one small step coarser — that's also what Varia recommends.
3. Note the reference value per bean (clicks/dial).
4. Clear fines from the outlet and chamber with a brush and bellows.

Sources: Comandante — FAQ · Varia — Dialling in espresso (help article)

Stop line: No disassembling "on suspicion", no work on the motor.

Go deeper: Grinder Lab · Gear: brush & bellows in Grinder Accessories

1. Unplug it, empty the bean hopper.
2. Clear the outlet chute from the outside with a brush and vacuum cleaner.
3. Varia: check whether the grind setting is in the 0–1 range — according to Varia, you should never grind there. Set it coarser, remove leftover beans and foreign objects (e.g. small stones) from the grind chamber and use the bellows after every grind.
4. Eureka (Mignon range, Oro Single Dose Pro): according to the manual, you remove the bean hopper, take off the lid, open the upper burr carrier and clean the burrs and internal parts with a dry brush or cloth, using a vacuum cleaner or compressed air if needed. The same manual, however, also states that maintenance and cleaning should be carried out by specialist staff authorised by the manufacturer — if you don't feel confident doing it, get in touch with us.
5. Operate the bellows several times, start a test grind coarser, then step by step finer. Eureka: according to the manual, grind a little coffee roughly every 2 notches — a full turn with the motor stopped can block the grinder.

Sources: Varia — VS3 Manual ("blocked grind chamber") · Varia — VS3: grind chamber blocked (help article) · Eureka — Mignon instruction manual (with German section, PDF) · Eureka — Oro Single Dose Pro instruction manual (with German section, PDF)

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Eureka: don't disassemble anything beyond the upper burr carrier — the motor, electronics and lower burr carrier are off limits. If a foreign object blocks the motor: switch off immediately and get in touch with us — according to Eureka, a job for authorised customer service.

Gear: brushes from the cleaning range · Burr cleaner: Urnex Grindz (not for super-automatic grinders with a brew chamber)

1. Varia VS3: with the motor switched off, turn the hopper clockwise as far as it goes past "0", then back to "0" — that's your zero point. According to Varia, two or three clicks of play past "0" are normal. Never switch on at the stop: that's where the burrs touch.
2. Varia VS4: according to Varia, you don't need to recalibrate — the zero point is kept when cleaning and when removing the hopper. According to Varia, an offset of around 2 marks on the dial is normal.
3. Varia VS6: brush the thread, grind chamber and burrs completely clean — according to Varia, coffee residue otherwise shifts the zero point. Each burr (flat or conical) has its own zero point. Screw the hopper in clockwise only as far as "0".
4. Comandante: zero = the first setting where the horizontally held crank no longer falls on its own; count clicks from there.
5. Option-O: normal cleaning keeps the grind setting. After a burr change, carry out the zero calibration according to the official video for your model.
6. Note the new reference values — the first few grinds are a settling-in phase.

Sources: Varia — VS3 Manual (calibration, section 4.1) · Varia — Does VS4 hold calibration? (help article) · Varia — VS4 zero point (help article) · Varia — VS6 Manual (section 3.6) · Varia — VS6: grind setting changes after cleaning (help article) · Option-O — User Guides: Casa · P80 · P64 · 01 · mini 2

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: No disassembly beyond the manual's steps (bearing seat, motor shaft); never force the burr carrier into alignment.

1. Operate the bellows after every grind — that's part of the single-dose workflow.
2. Weber EG-1 up to v3 (which we list as Mk.3): switch the grinder off at the main switch, remove the upper and lower magnetic caps, brush out the grind chamber or wipe it with a damp cloth — according to Weber a 30-second routine, ideally at every bean change. Never put the parts in the dishwasher. New Weber EG-1 (October 2026): remove the single-piece burr chamber cover without tools and clean the grind chamber — thanks to Intrinsic Alignment, according to Weber no manual alignment is needed after cleaning or burr changes; Vibe Tone helps loosen coffee left between the burr teeth after grinding.
3. Weber Key Mk II: clean the burr, funnel and base plate with the built-in brush. For a thorough clean, according to Weber, remove the lower funnel with a twist, take out the conical burr with the supplied key and brush both burrs.
4. Weekly, brush and vacuum the outlet and chamber.
5. Compare the weight in and weight out (e.g. 18 g in → 18 g out).

Sources: Weber Workshops — EG-1 Cleaning (EG-1 up to v3) · Weber — EG-1 v3 Manual (PDF) · Weber — KEY Manual (PDF) · Weber — KEY Quickstart (PDF) · Weber Workshops — Key (Maintenance and Cleaning) · Video: (EG-1 up to v3) · Weber Workshops — EG-1 (new generation)

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: EG-1 up to v3: the wiper system and bearings only as far as the magnetic-cap opening. New EG-1: do not disassemble beyond the removable burr chamber cover. Electrics are off-limits.

Gear: dosing cups & bellows in Barista Accessories · Puck Prep Workshop

Static is normal, especially with new grinders — according to Varia, it gets noticeably better after the first 2 kg or so of beans. To counter static, Varia, Option-O and Weber recommend RDT, i.e. a little water on the beans before grinding:

1. RDT as specified by the manufacturer: Varia VS3 2–3 sprays onto the beans in the dosing cup, cover the cup and shake it, wipe the cup dry before grinding; Varia VS4 about 1 spray; Option-O P64 1–3 sprays for 18 g from a distance of 2–4 cm, then shake; Weber Key 1 spray per dose. Never spray into a running grinder.
2. Mazzer Philos: the manual prohibits moistening the beans; the Mazzer FAQ, on the other hand, describes the bean path as moisture-safe. As long as Mazzer contradicts itself, if in doubt skip RDT on the Philos.
3. Use a metal catch cup instead of plastic.
4. Let the cup sit briefly after grinding, then tap it. For the M47 Traveler hand grinder, Kinu recommends tapping the body and container lightly after grinding.
5. Clean the outlet regularly — fines increase static, and according to Varia it also helps not to grind too fine. In our experience, dry winter air in Swiss indoor spaces makes it worse.

Sources: Varia — VS3 Manual (section 4.4 "Static and RDT") · Varia — VS4 User Manual (section 5.5) · Varia — static with new grinders (help article) · Option-O — LAGOM P64 Safety Manual ("Some words on RDT", PDF) · Weber — KEY Quickstart (PDF) · Mazzer — Philos (FAQ "Can I do RDT") · Mazzer — Philos Operating Manual (English, section 5) · Kinu — M47 Traveler instruction manual (with German section, PDF)

Stop line: No water in the container or chamber, no anti-static modifications to the electrics.

Gear: metal dosing cups (Varia/Normcore) in Barista Accessories

1. Switch off immediately, unplug it, remove the beans.
2. Only open the grind chamber via the officially approved route (Varia: manual, disassembly section) and remove foreign objects — usually a small stone.
3. Eureka: if a foreign object blocks the motor, switch off immediately — according to Eureka, a job for authorised customer service, get in touch with us. Mazzer Philos: only remove foreign objects with the mains plug pulled out. If the overheating protection has tripped because the burrs are blocked: switch off, pull the plug and get in touch with us — according to Mazzer, a job for qualified staff.
4. Vacuum the chamber, choose a coarser setting, test again.
5. Check the outlet and cable against another device.
6. If the motor still won't start: service — don't keep trying.

Sources: Varia — Manual (foreign material) · Eureka — Mignon instruction manual (safety instructions, with German section, PDF) · Mazzer — Philos Operating Manual (English, sections 3 and 8.4)

Absolute limit: Motor, capacitor, circuit board, power supply — never yourself. In the case of stone damage, we check the burrs at the same time.

Request service & repairs

1. With daily use, disassemble weekly and clean with a brush/compressed air — explicitly intended by the manufacturer.
2. Clean the C40's burr set and interior dry only: brush, bellows or compressed air. If the body is dirty, wipe it with a slightly damp cotton cloth and dry it immediately. Never soak it, never put it in the dishwasher — according to Comandante, the wood veneer and ball bearings would otherwise suffer. You may clean the Bean Jars with hot water. Comandante only allows rinsing with water for the C60 and X25 Trailmaster. Never clean the Ironheart steel burr set wet (it's not stainless).
3. Determine the zero point: hold the grinder horizontally — the first setting where the crank no longer falls; count clicks from there.
4. A slight amount of play at the top of the crank is by design — not a defect.
5. If the wooden knob squeaks: pull off the knob, lubricate the crank or the inside of the knob with a little mineral or olive oil, then push the knob back on until it clicks into place — that's what Comandante recommends.

Sources: Comandante — FAQ · Comandante — C40 instruction manual (German, PDF)

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Never loosen the three screws at the bottom of the grind ring — according to Comandante, they hold the factory calibration; loosening them can damage the grinder and void the warranty. Don't remove the grind ring. If the axle is bent, get in touch with us.

Spare parts & Red Clix: Comandante Accessories · Hand Grinders

1. Switch on the scale, update the app and the smartphone's system.
2. Close all other coffee apps — the scale only holds one Bluetooth connection.
3. Android: enable location services; switch Bluetooth off and back on, keep the phone close to the scale.
4. Stuck update: close the updater app, disconnect and reconnect USB power, do a soft reset, restart the update.

Sources: Acaia — Scale doesn't connect · Acaia — Firmware update failed

Stop line: Never open the scale.

1. Adjust the sleep/auto-off timer in the settings or via the app (Lunar: 5 to 60 minutes, or off).
2. Check the charging indicator: according to the instructions, the Lunar and Pearl S show a lightning bolt icon at the top left while charging (Pearl S: orange). It goes out when the battery is full. The Acaia help article states "bottom left" for the Lunar — the instructions for your model are what counts.
3. Test the cable on another device — faulty cables are the most common cause.
4. Let a hot scale cool down first — the charge protection blocks charging when it's warm.
5. Don't let the battery run completely flat, and charge it as needed — that's what the Acaia instructions say. If it's deeply discharged after long storage, leave it on the power adapter for a long time (Pyxis Black: according to Acaia at least 8 hours).

Sources: Acaia — Lunar Manual (German, PDF, 01.2026) · Acaia — Charging

Stop line: Don't replace the battery yourself, don't open the housing — that's our recommendation from the workshop. If the scale still won't charge, get in touch with us.

Scales & accessories: Barista Scales

1. Place it on a stable, level, vibration-free surface; eliminate drafts and fans.
2. Lunar: check the base alignment — loosen the hex screws slightly, create an even gap between the base and the tray.
3. Pearl: remove trapped packing-foam residue between the base and housing.
4. Calibrate: set the unit to grams, in weigh-only mode tap the T button quickly (6–7 times) until "CAL" appears, place the 100 g calibration weight centred on the scale and wait until "End" appears. Pyxis Black: in a brewing mode without Umbra pairing instead of weigh-only mode. Acaia recommends calibrating at home about once a month.

Sources: Acaia — Numbers jumping · Acaia — Calibration guide · Acaia — Lunar Manual (German, PDF, 01.2026)

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Never touch or adjust the load cell; after a drop or overload = support.

If the hopper turns while you grind and your grind setting drifts, the cause is usually the hopper thread: Varia greases it at the factory with food-safe grease. As that wears off over time, the thread slips more easily. That's maintenance, not a defect. If the hopper shifts by less than one click per grind, that's normal according to Varia — the thread is settling in.

Try this first — in this order:

1. Unplug the grinder, unscrew the hopper anticlockwise and regrease the thread with a little food-safe grease (we use Renz silicone grease for this). Put the hopper back on, turn it to the zero point and set your grind size again.
2. If it still shifts: Varia then recommends turning the ring bearing over and replacing the four springs with the ones from the included spare parts kit. The springs sit below the outer burr — the VS3 manual shows step by step how to remove and refit them (sections 5.1 and 5.2). Then reset the zero point and your grind size.
3. If neither helps, sometimes the opposite does: remove the grease from the thread completely and run the VS3 without grease. The dry thread has more friction and holds the setting better. This comes from our own workshop experience and differs from Varia's recommendation (grease the thread) — so only try it once steps 1 and 2 haven't helped.

Sources: Varia — VS3 Manual (FAQ «The hopper on my VS3 is moving while grinding?», sections 5.1/5.2) · Varia — VS3: Why does the dial shift while grinding? (help article) · Step 3: Coffee Coaching Club — our own technical/workshop experience

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Only take it apart as far as the manual shows — the bottom cover stays closed, the motor and drive are off limits. Careful, the burrs are very sharp. And never switch it on at the tightest setting: that's where the burrs touch.

Gear: Renz silicone grease (food-safe) · Varia VS3 spring set

The VS4 doesn't have a stepless speed dial, but four fixed settings (150/200/250/300 RPM). 200 RPM is a good starting point — but in the end your taste decides, not the number on the dial.

1. Start at 200 RPM — according to Varia, the compromise if you use one grinder for different brewing methods.
2. For filter coffee, cold brew and light roasts, switch to 150 RPM. According to Varia, this produces fewer fines and a clearer taste.
3. For espresso, Varia recommends 200–250 RPM — this keeps a few more fines in the grounds, which gives more body.
4. If you want to grind faster, choose 300 RPM.
5. Feel free to experiment across the four settings. The RPM choice affects speed and fines — your espresso in the cup decides which setting is right for you.

Sources: Varia — VS4 User Manual (section 4.3) · Varia — VS4: How should I set the RPM? (help article) · Varia — Download-Centre

Stop line: If the grinder repeatedly stops mid-grind at a particular setting for no apparent reason, don't keep experimenting endlessly — get in touch with us instead; we're an official Varia dealer in Switzerland.

Varia describes this in its help centre: if the VS4 is permanently plugged in, it goes into sleep mode 5 minutes after the last grind. If you then turn the dial from "OFF" to 150 RPM or another setting, it won't start. That's not a defect.

1. Set the dial to your speed (150, 200, 250 or 300 RPM).
2. If it doesn't start: press the dial once — on the VS4 it's also the on/off switch. Then wait around 2 seconds: according to Varia, the VS4 first calibrates itself and then starts up gently with a soft start.
3. If the VS4 hasn't been switched on for a while, in our experience you may need to press it three times in quick succession before it starts again.
4. After grinding, turn the dial back to "OFF". Good to know: if you forget, the VS4 stops by itself after about 20 seconds without beans in the grind chamber, according to the manual.

Sources: sleep mode and soft start — Varia — VS4 auto-off (help article) · Varia — VS4 start time (help article) · Varia — VS4 won't power on (help article) · pressing three times — Coffee Coaching Club, our own hands-on experience · Operation & auto-stop: Varia — VS4 User Manual (sections 4.3 and 5.1) · Varia — Download-Centre

Stop line: If it still won't start, check the socket with another device and check that the quick-release ring is locked — that's what Varia recommends. Then get in touch with us instead of opening the grinder. According to Varia, the lower chamber and drive are off limits.

Flat and conical burrs need different speeds: according to Varia, the conical burr always runs 200–300 RPM lower than the flat burr, otherwise the beans jump around in the chamber (popcorning). Grind light roasts more slowly, dark roasts faster.

1. With the flat burr: light roast 700–900 RPM, medium 900–1200 RPM, dark 1100–1400 RPM.
2. With the 63 mm conical burr: light roast 500–600 RPM, medium 600–800 RPM, dark 700–900 RPM. If the beans jump, go back to 500–600 RPM.
3. If the VS6 shows error E006, the motor's overload protection has tripped: switch it off and let it cool for 15–30 minutes, check the hopper for foreign objects, clean the grind chamber and knocker. Afterwards, don't grind extremely fine, and add hard, light roasts in portions only once the grinder is running.
4. Move within these ranges to suit your taste — the RPM number is a starting point, not the goal.

Sources: Varia — VS6: recommended RPMs for different burrs (help article) · Varia — VS6: beans popcorn with conical burr (help article) · Varia — Error E006 on VS6 (help article)

Stop line: If E006 comes back after these steps, don't keep experimenting endlessly — get in touch with us, ideally with a short video showing the grind setting, speed and error message. That's exactly what Varia needs for the diagnosis.

Usually the lock nut on the conical burr has loosened and the lower burr has shifted slightly outward. This can be corrected by hand without a toolbox.

1. Attach the hand crank or motor head on top so the shaft is fixed.
2. Remove the catch cup and check the lock nut at the base of the conical burr.
3. Loosen the nut slightly, push the lower burr inward and turn it until it seats noticeably.
4. Hold the burr pressed in this position and tighten the nut firmly again.

Source: Varia — Why is my EVO Grinder not grinding fine enough for espresso? (help article)

Stop line: If the nut doesn't loosen easily or the burr jams, don't use force — get in touch with us instead.

A noticeable measurement error can be fixed yourself on all three AKU models using the built-in calibration function — all you need is a 100 g reference weight.

1. Place the scale on a level, stable surface and zero it.
2. On the AKU and AKU mini: press the tare button 6 times to open the calibration mode, then choose the matching capacity.
3. Place a 100 g calibration weight centred on the scale and wait until "PASS" appears.
4. On the AKU PRO: likewise press the tare button 6 times to open the settings. Use the tare button to scroll to the calibration menu item, briefly press the power button (don't hold it) and follow the instructions on the display: place the 100 g weight centred on the scale and finish with the tare button.

Source: Varia — AKU Scale User Manual · Varia — AKU PRO Scale User Manual (Settings, "7. Calibration")

Stop line: If "PASS" doesn't appear even after several attempts, don't keep calibrating on your own — get in touch with us instead; we're an official Varia dealer in Switzerland.

Varia names one clear prerequisite: the scale needs the latest firmware, otherwise it won't connect to the app.

1. Update the scale's firmware — according to Varia, Bluetooth updates for the AKU now run via the Varia App.
2. If the firmware download doesn't work, Varia recommends: choose the firmware for your AKU model, switch the scale off and on again at the main switch next to the USB-C port, fully charge the scale and your phone, go somewhere with few other Bluetooth devices and try again — if necessary with a phone running the other operating system (iOS or Android).
3. Update your coffee app in the App Store or Play Store.
4. Turn Bluetooth on your phone off and back on.
5. Close other Bluetooth devices or a second coffee app nearby — the scale only holds one connection at a time.
6. Still no connection: get in touch with us.

Source: Varia — AKU: Why can't my scale connect to Bluetooth? (help article) · Varia — AKU: issues with downloading the firmware (help article) · Varia Lab — Download-Centre & Varia App · Varia — AKU Scale User Manual · Varia — AKU PRO Bluetooth

Stop line: If it still won't connect despite an update and restart, don't open the scale yourself — get in touch with us; we're an official Varia dealer in Switzerland.

1. Use only a 5V/1–2A USB-C power adapter, never a fast charger — and don't use the scale while it's charging.
2. Test the charging cable and power adapter on another device to rule each one out individually.
3. Auto-tare only responds in certain operating modes (not available in every mode) — check the manual for the right mode.
4. Set the vessel down stably and calmly before auto-tare can trigger.
5. If liquid has already gotten in: stop charging or using it — the scales are splash-resistant (IPX5/IPX6) but not waterproof.

Source: Varia — AKU Scale User Manual · Warranty: Varia — buying from a dealer: how the warranty works (help article) · Varia — information needed for a warranty claim (help article)

Stop line: No charging progress despite the correct power adapter, or liquid has got in: don't open it yourself. With Varia, warranty claims go through the dealer — if you bought from us, get in touch with us (we're an official Varia dealer in Switzerland). Include the proof of purchase and a photo or video of the problem.

According to Mahlkönig's troubleshooting tables, the possible causes are: a clogged grinding mechanism, a grind setting that's too fine, ground coffee that has backed up after overdosing the portafilter, or a foreign object in the grinding mechanism. For the first three causes, according to the instructions, the grinder grinds itself free again at the coarsest setting; for a foreign object, see the stop line below.

Try this first:

1. After overdosing, first clean the spout with a brush.
2. Set the grind to the coarsest setting — E64 WS: highest µm value, X64 SD: «12», X54: maximum value, EK43: coarsest step. On the E65S GbW and E80 GbW, release the grind setting lock first.
3. Start grinding — the grinder grinds itself free.
4. Then set your desired grind size while the grinder is running.
5. Prevention: on the X54, E65S GbW and E80 GbW, according to the instructions, you only adjust finer while the grinder is running; on the EK43 you only ever adjust the grind while the grinder is running; on the X64 SD, larger steps only while the motor is running. For the E65S GbW, E80 GbW and EK43, Mahlkönig also recommends that, for a finer setting, you first go about one step coarser and only then move to the target value — this way, according to the instructions, you avoid imbalances or inaccuracies in the grind setting.

Sources: Mahlkönig — E64 WS instruction manual (English, PDF) · X64 SD instruction manual (English, PDF) · X54 instruction manual (English, PDF) · E65S GbW instruction manual (English, PDF) · E80 GbW instruction manual (English, PDF) · EK43 instruction manual (English, PDF) · Mahlkönig — FAQ · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Never force the grind finer while beans are blocking the burrs — on the X54, according to Mahlkönig, this can damage the adjustment levers or even the burr casing. For the X64 SD, Mahlkönig warns: if you adjust the grind in larger steps while the grinder is at a standstill, you risk mechanical overload the next time you grind — in the worst case, damage to the burrs, motor and gear parts. If a foreign object is stuck in the burrs: on the X64 SD and X54 the manual says it's a job for customer service; on the other models, according to the instructions, you remove it when cleaning the grinding mechanism — if it can't be removed that way, according to Mahlkönig it's a job for the service partner. In both cases: get in touch with us.

Gear: grinder cleaner Urnex Grindz · brushes from the cleaning range

1. Check the plug: according to Mahlkönig, it must be plugged into a properly installed socket.
2. Is the bean hopper seated correctly? On the E64 WS, X54 and the GbW and GbS models, the grinder won't grind without a correctly fitted hopper (X54: error message E001). If there are beans in the hopper seat, remove them — otherwise the hopper won't fit.
3. Overcurrent protection switch (on the E64 WS, X54, the GbW and GbS models and the EK43): switch the grinder off, press the tripped release button back in, switch the grinder on again. On the EK43, according to the manual, also unplug the grinder first.
4. Ground a lot in one go? On the E64 WS, the GbW and GbS models and the EK43, a motor protector also switches the grinder off when the motor gets too hot — let it cool down. According to their manuals, the E64 WS and X64 SD home grinders are built for short intervals: max. 6 seconds of grinding, 54 seconds of pause, max. 2.5 kg per day.
5. GbW and GbS models: check your household fuse and, if necessary, unplug other appliances on the same circuit. On the EK43, if the upstream fuse has tripped, the manual refers you directly to the service partner.

Sources: Mahlkönig — E64 WS instruction manual (English, PDF) · X64 SD instruction manual (English, PDF) · X54 instruction manual (English, PDF) · E65S GbW instruction manual (English, PDF) · E80 GbW instruction manual (English, PDF) · E65W GbS instruction manual (English, PDF) · EK43 instruction manual (English, PDF)

Stop line: If the protection switch or the fuse trips repeatedly, stop trying — according to Mahlkönig, that's a job for the service partner. Otherwise, if the overcurrent protection switch trips repeatedly, the motor winding may be damaged (as noted in the instructions for the E64 WS, the GbW and GbS models and the EK43). Never open the housing.

Request service & repairs

According to Mahlkönig's troubleshooting tables, a load cell calibration is then needed: when the display is red and when the grinder weighs inaccurately — on the E64 WS and the GbS models also when the grinder grinds on its own. If it weighs inaccurately, Mahlkönig names an unstable installation location as a further cause.

1. Use a brush to remove ground coffee from the portafilter support, portafilter holder and spout — on the E65S GbW, E80 GbW and GbS models also from the magnetically held load cell cover.
2. Place the grinder on a level, stable, vibration-free surface — vibrations and draughts distort the weight.
3. E64 WS, E65S GbW and E80 GbW: start the calibration in the «Service» menu («Calibrate load cell» or «Load Cell – Calibrate») and follow the instructions on the display. Remove the portafilter — nothing may touch the support while the grinder determines the zero point. At the end, the E64 WS shows «calibration complete» in green.
4. GbS models: according to the instruction manual, you start the calibration via the software — but according to the Grind-by-Sync software manual, the «Service» menu is reserved for technician access. For this, get in touch with us.
5. Calibration weight: according to the manuals, the E65S GbW, E80 GbW and GbS grinders are calibrated with a 1 kg weight (Mahlkönig accessory); for Grind-by-Sync, Mahlkönig shows in the «Custom Weight» video how other calibration weights can also be used with newer software (also in the «Service» menu). According to the Quick Guide, the E64 WS needs a reference weight between 400 g and 1100 g — a calibrated 1 kg weight is optionally available from Mahlkönig.
6. When? E64 WS and GbS models weekly or as needed, E65S GbW and E80 GbW every six months — and always after readjusting the portafilter support or relocating the grinder. On the E64 WS and GbS models also after cleaning the surface the grinder stands on.
7. Never lift the grinder by the portafilter support or the bean hopper — according to the manual, only by the housing, with both hands.

Sources: Mahlkönig — E64 WS instruction manual (English, PDF) · E64 WS Software Manual (PDF) · E64 WS Quick Guide (English, PDF) · E65S GbW instruction manual (English, PDF) · E65S GbW quick start guide (DE/EN, PDF) · E80 GbW instruction manual (English, PDF) · E65W GbS instruction manual (English, PDF) · Grind-by-Sync Software Manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Nothing gets taken apart beyond the load cell cover. If the display stays red after a clean calibration or the weight keeps drifting: that's a service case — get in touch with us.

1. Calibrate the load cell (see point 21) — according to Mahlkönig, this is necessary when the location has changed or the calibration interval has been exceeded.
2. Clean the spout: Mahlkönig recommends a brush with nylon bristles, on the E64 WS once a week. Remove the spout (E64 WS: turn it out of the lock and pull it down), brush out the outlet on the housing, wipe the spout with a damp cloth and dry it. Watch out for scratches: according to Mahlkönig, ground coffee sticks to them and causes dosing fluctuations.
3. If grounds have built up inside: coarsest setting, start grinding, let the grinder clear itself, then reset the grind while it's running.
4. Clean the flappers — E64 WS: silicone and metal flapper; E65S GbW and E80 GbW: every 2–5 days with lukewarm water, then dry. Mahlkönig shows in the video on the «Mahlkönig Home» channel how to open the grinding chamber on the E64 WS and reach the flappers.
5. Flapper worn? On the E65S GbW and E80 GbW, replace it when it's porous, deformed or heavily soiled. On the E64 WS, the manual says the service partner replaces a worn silicone flapper; in the video mentioned above, Mahlkönig shows how to open the grinding chamber and fit the new metal flapper.
6. If the grounds don't land centred: align the spout with your portafilter and adjust the portafilter support — E64 WS: loosen the screws until the support slides down, insert the portafilter, push the support up until the portafilter fits exactly in between, tighten the screws. Then recalibrate the load cell.
7. E64 WS: don't let the hopper run empty — according to the manual, keep at least about 1 cm of beans above the finger guard, otherwise the dose fluctuates.

Sources: Mahlkönig — E64 WS instruction manual (PDF) · E65S GbW instruction manual (PDF) · E80 GbW instruction manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: A damaged spout is a service case. Only open the grinding chamber as far as your model's manual describes — on the E64 WS, whose manual doesn't describe opening it, as far as Mahlkönig shows in the video on the «Mahlkönig Home» channel. Unplug first; on the E65S GbW and E80 GbW, the manual requires gloves for manual cleaning. According to Mahlkönig, the flapper videos for the E65S GbW and E80S GbW are intended for technicians and trained specialist staff.

Gear: E64 WS flapper set · E65S flapper set · Silicone flappers 10-pack E65S/GbW · X64 SD flapper · X54 flapper

What Mahlkönig specifies, depending on the model:

• E64 WS: «Service» menu → «Calibrate Disc Distance» (fine calibration of the burr distance) and follow the display — Mahlkönig also shows this in the «E64 WS Zero Calibrate» video. For a burr replacement, the manual refers you to the service partner.
• X64 SD: Mahlkönig shows the zero-point calibration in the «X64 SD Zero Calibration» video on the «Mahlkönig Home» channel. For a burr replacement, the manual refers you to customer service.
• X54: according to Mahlkönig, every grinder is calibrated at the factory so that it covers the right grind range. According to its warning, the «X54 | Calibration» video is intended exclusively for technicians and trained specialist staff, and according to the manual, readjusting the burrs is a job for customer service — for that, get in touch with us. According to Mahlkönig, the standard burrs can't grind powder-fine for Turkish coffee even at the finest setting — this applies not only to the X54 but to all Mahlkönig grinders without special burrs for Turkish coffee.
• E65S GbW and E80 GbW: according to the manual, clean the burrs (see point 25), replace them or adjust them. After a burr replacement, Mahlkönig recommends adjusting the burrs and calibrating the Disc Distance Detector (DDD). According to Mahlkönig, the videos on this are intended for technicians and trained specialist staff.
• Grind-by-Sync (E65W/E80W GbS): according to the software manual, «Calibrate Disc Distance» is in the «Service» menu, which is reserved for technician access; Mahlkönig also shows the electronic zero-point calibration in the «Electronic Zero Calibration» video. For this, get in touch with us.
• EK43 / EK43 S: if the burrs are worn or not correctly aligned, the manual refers you to the service partner. According to Mahlkönig, the calibration videos are intended for technicians and trained specialist staff — get in touch with us.
• Wear: according to Mahlkönig, the burrs of its home grinders (E64 WS, X64 SD, X54) last about 500 kg of coffee on average. For the professional grinders, Mahlkönig recommends replacing them after about 700 kg (E65S GbW) or 1500 kg (E80 GbW) — depending on grind size, type of bean, degree of roast and the condition of the burrs.
• Burr replacement: on the E64 WS, X64 SD and X54, the manual says to go through service (X54: error code E010 = burrs worn). The E65S GbW and E80 GbW manuals describe the replacement with the optional burr replacement tool.

Sources: Mahlkönig — FAQ (home grinder burrs, factory calibration, Turkish coffee) · E64 WS instruction manual (English, PDF) · E64 WS Software Manual (PDF) · X64 SD instruction manual (English, PDF) · X54 instruction manual (English, PDF) · E65S GbW instruction manual (English, PDF) · E80 GbW instruction manual (English, PDF) · Grind-by-Sync Software Manual (PDF) · EK43 instruction manual (English, PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Only original Mahlkönig burrs: according to Mahlkönig, imitations can cause motor failure and void the warranty. Wear gloves when replacing the burrs — as the E65S GbW and E80 GbW manuals require.

Gear: original burrs 64 mm (X64 SD/E64 WS) · 54 mm (X54) · 65 mm (E65S) · 80 mm (E80S) · 98 mm (EK43) · all parts in the Mahlkönig range

1. 2.4 GHz only: the E64 WS, the Grind-by-Sync grinders and the Sync Scale use the 2.4 GHz band — 5 GHz won't work. For the E64 WS and Grind-by-Sync, according to the software manual, your phone should also be on the 2.4 GHz network during setup if you use a dual-band router.
2. Grind-by-Sync grinders (GbS): first set the time zone, time and date in the general settings — according to Mahlkönig, the Wi-Fi won't connect without the correct time and date.
3. E64 WS: menu «Connectivity» → «Connectivity Diagnosis». The diagnosis shows the chain from the grinder to the cloud; whatever is red is where it's stuck. Clicking the entry with the rotary knob shows troubleshooting suggestions. If you don't see «Connectivity»: according to the software manual, the menu only appears if you're logged in as the owner with connection rights — to do this, set a password (it may also be confirmed blank).
4. X54: according to Mahlkönig, the grinder opens its own Wi-Fi network (access point), which your phone or laptop connects to — through it, you upload software updates or download log files in your browser. The «X54 | WiFi connection and web server» video shows how this works. With error message E002 (no Wi-Fi connection): switch the grinder off and on again, then reset the Wi-Fi setting via «rSEt». If that doesn't help: customer service — get in touch with us.
5. Pairing the Sync Scale with a Grind-by-Sync grinder (GbS models, E64 WS): the grinder must be onboarded in the Mahlkönig Sync app and have the latest software. GbS models: under «Connectivity», activate the cloud connection in «Cloud Settings» and enable the cloud device under «Machine to Machine». E64 WS: activate the cloud via «Connectivity» → «E64 WiFi & Cloud Setup» and select «Enable Cloud Device» under «Machine to Machine». Then, in the app, select «Onboard & Sync devices» → «Syncing» → «Coffee scale», choose the scale and the grinder and confirm with «YES».
6. Fully disconnecting the Sync Scale from the network: according to Mahlkönig, removing it from the app isn't enough — also run «Reset WiFi» in the scale's setup menu.
7. Nothing works any more: factory-reset the Sync Scale as shown in the official video.

Sources: Mahlkönig — E64 WS Software Manual (PDF) · Grind-by-Sync Software Manual (PDF) · Grind-by-Sync Quick Start Guide (English, PDF) · Mahlkönig — FAQ · X54 instruction manual (English, PDF) · Sync Scale User Manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: In the grinder's web interface, only do what Mahlkönig documents (e.g. the firmware update). On the E64 WS and Grind-by-Sync, according to the software manual, everything else is reserved for technicians — a wrong configuration can permanently damage the electronics.

1. Bean hopper: according to the manual, wipe off coffee oil daily (E64 WS, E65S GbW, E80 GbW, GbS models and EK43; X54: ideally daily with frequent use) with a damp cloth and dry it; the residues affect the taste. First close the hopper towards the burrs and grind the remaining beans empty.
2. Weekly: clean the spout with a nylon brush, wipe the housing and drip tray with a damp cloth.
3. Grinding mechanism every 2–5 days with a grinder cleaner such as GRINDZ: coarsest setting, remove the hopper, add the cleaner directly into the burrs as directed on the pack, grind it through — then grind about the same amount of coffee beans and throw both away. X54: with frequent use about weekly, at a medium setting, then grind beans through twice.
4. X64 SD: when switching beans, blow residual grounds out of the hopper with the single-dose bellows.
5. E64 WS and E65W/E80W GbS: recalibrate the load cell after cleaning the surface the grinder stands on (see point 21).
6. Off-limits according to Mahlkönig: compressed air (e.g. an air gun), water jet, steam cleaner, immersing the grinder in water; don't put the drip tray or hopper lid in the dishwasher; no sharp or metallic cleaning tools such as knives or metal scourers — they scratch the surface.

Sources: Mahlkönig — E64 WS instruction manual (English, PDF) · X64 SD instruction manual (English, PDF) · X64 SD Quick Guide (English, PDF) · X54 instruction manual (English, PDF) · E80 GbW instruction manual (English, PDF) · E65W GbS instruction manual (English, PDF) · E80W GbS instruction manual (English, PDF) · EK43 instruction manual (English, PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Only open the grinding chamber if the manual describes it for your model (e.g. manual cleaning of the grinding mechanism on the E80 GbW — with gloves, according to the manual) or — on the E64 WS — as shown in the video on the «Mahlkönig Home» channel. Unplug first.

Gear: grinder cleaner Urnex Grindz · brushes from the cleaning range

The EK43 is a commercial shop grinder — according to Mahlkönig, only trained staff may service it. Here's what you can do in everyday use:

1. Only adjust the grind while the grinder is running (scale 0 = fine to 16 = coarse); for finer settings, first go about one step coarser, then turn to the target value — this way, according to Mahlkönig, you avoid inaccuracies in the grind setting.
2. After grinding, use the lever to let the knocker tap against the spout a few times.
3. Clean the bean hopper daily and the grinding mechanism every 2–5 days with a grinder cleaner at the coarsest setting.
4. Calibration (zero point) and centring are maintenance tasks: if the burrs are worn or not correctly aligned, the manual refers you to the service partner. According to Mahlkönig, the official videos on this are intended for technicians and trained specialist staff.
5. For trained staff: according to Mahlkönig, the Mahlkönig centering tool eliminates the axial offset between the burrs and the motor shaft. The official instructions show every step — unplug, coarsest setting, remove the faceplate and the prebreaker with the rotating burr, clean all surfaces thoroughly, centre both burrs with the tool, apply the enclosed grease to the motor shaft when reassembling and tighten the faceplate alternately left and right.

Sources: Mahlkönig — EK43/EK43 S instruction manual (English, PDF) · EK43 centering tool — instructions (DE/EN, PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Only centre the burrs if you have training and experience — the instructions say to be very careful when opening and never to leave the grinder unattended. According to Mahlkönig, if an unauthorised person opens the machine, liability and warranty claims against the manufacturer become void. The housing stays closed — if in doubt, get in touch with us.

Gear: Mahlkönig alignment tool EK43/EK43 S · 98 mm burrs EK43

1. Red symbol on the display: select the symbol with the jog dial and press once briefly — the error menu shows the current code.
2. E001: insert the bean hopper. E002: Wi-Fi (see point 24). E004 (LED failure) and E008: switch the grinder off and on again; if the code remains → customer service. E003 (grinder stuck in manual grind mode) and E010 (burrs worn): customer service.
3. According to Mahlkönig, a certain amount of spraying at filter grind sizes is normal and not specific to the X54 — lightly misting the beans with water before grinding helps. If it doesn't improve, Mahlkönig recommends cleaning the flapper, spout and grinding mechanism. According to the manual, you clean the grinding mechanism with a grinder cleaner (see point 25). The «X54 | Flapper replacement» video shows how to get to the flapper — according to its warning, it is intended for technicians and trained specialist staff, so for that, get in touch with us.
4. Adjust the portafilter holder: remove the portafilter module while holding down the push button on the side. Loosen the screw of the portafilter rest on the back of the module with a screwdriver — the rest drops down. Insert the portafilter, push the rest up until the portafilter fits exactly in between, tighten the screw and refit the module.
5. Grind setting (01 = fine to 35 = coarse): only adjust finer while the grinder is running.

Sources: Mahlkönig — X54 instruction manual (English, PDF) · Mahlkönig — FAQ · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Never force the setting from coarse to fine while beans are blocking the burrs — according to Mahlkönig, this can damage the adjustment levers or the burr casing.

Gear: X54 flapper · 54 mm burrs X54 · Bean hopper 0.25 kg X54/E64 WS

1. Automatic updates (E64 WS): when the grinder is connected to the cloud, it announces new software itself. Requirements according to Mahlkönig: a password must be set (blank or at least 8 characters with an upper-case letter, a lower-case letter and a number) and the cloud enabled via «Connectivity» → «E64 WiFi & Cloud Setup».
2. Without the cloud: update via the grinder's web interface with the .swu file from the Mahlkönig product page — step by step in the official video.
3. Factory reset (E64 WS): «Service» menu → «Factory Reset». Caution: this deletes all settings and recipes. On the GbS models, according to the software manual, the «Service» menu is reserved for technician access.
4. Forgotten password (E64 WS; according to the software manual, the same applies to the GbS models): remove the bean hopper, switch the grinder off, press and hold both buttons, switch it on and keep them pressed for 15 seconds — the factory reset page then appears for confirmation.
5. Mahlkönig shows software updates for Grind-by-Sync, the E65S GbW and E80S GbW in dedicated videos, and a reset for the E80S GbW and E80W GbS (links below). According to Mahlkönig, the videos on the E65S GbW and E80S GbW and on resetting the E80W GbS are intended for technicians and trained specialist staff.

Sources: Mahlkönig — E64 WS Software Manual (PDF) · Grind-by-Sync Software Manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Note down your recipes before a reset. In the web interface, only carry out the documented firmware update — according to the software manual (E64 WS, Grind-by-Sync), all other settings are reserved for technicians (risk of permanent damage to the electronics).

Try this first:

1. Increase the speed with the knob on the back and restart the grinder.
2. According to Timemore, grind light roasts above 1000 RPM. The range: 064/064S 800–1200 RPM, 078/078S 800–1400 RPM. Don't set the speed too low for light or hard beans — otherwise the grinder can jam.
3. Weigh the beans beforehand: the Sculptor grinds the whole dose in one go. Close the lid while grinding.
4. If it stops after one minute, that's the automatic shut-off (after 60 seconds) — not a defect. You can pause at any time with the power button.
5. Take a quick look into the hopper before filling — foreign objects don't belong there.

Sources: Timemore — Sculptor 078/078S Manual (PDF) · Sculptor 064/064S Manual (PDF)

Stop line: If it still stops at a higher speed: don't keep forcing it and don't take it apart — get in touch with us.

Timemore gives guide values with «0» as the baseline: smaller number = finer, larger number = coarser; the red line shows the current setting. The 064 (without S) has 32 steps, the 078 (without S) 36; according to Timemore, you adjust the S models steplessly.

• 064S: Espresso 1–4 · Moka 3–5 · Pour over 8–13 · French press 13–16
• 078S: Espresso 0–5 · Moka 2–6 · Pour over 12–16 · French press 16–18
• 064: Pour over 5–12 · French press 12–16
• 078: Pour over 4–12 · French press 10–18

The values are starting points — in the end, your cup decides.

Sources: Timemore — Sculptor 064/064S Manual (Coarseness Setting, PDF) · Sculptor 078/078S Manual (PDF) · Timemore — Sculptor product page

Stop line: According to Timemore, the 064 and 078 without «S» aren't made for espresso — don't force them to espresso fineness; that's what the S versions are for.

Go deeper: Grinder Lab

1. After every grind, turn the rotary knocker clockwise — it knocks the fines out of the chute.
2. Clean the grounds chute with a brush and air blower after each use.
3. Don't wash any part of the main body and never immerse the grinder in water; a soft, damp cloth is enough for the outside — then let it dry completely.
4. Deep cleaning: the manual shows how to remove the burrs (unplug, pull the adjustment dial off horizontally …) and clean them with an air blower and brush. However, Timemore advises consulting customer service or professionals for this and excludes damage caused by your own disassembly and reassembly from the warranty.
5. Official videos: according to Timemore, the «Sculptor 078/078s Assembly Tutorial» is for information only — Timemore advises against assembling the grinder yourself. The «064S Burr Assembly Tutorial» shows how to install SSP burrs in the 064S; according to the video description, Timemore's after-sales service only repairs damage from an improper replacement for a fee.

Sources: Timemore — Sculptor 078/078S Manual (PDF) · Sculptor 064/064S Manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: The burrs are very sharp. We're happy to handle burr replacement or deep cleaning for you — get in touch.

Gear: replacement burrs 078 Turbo · 078S · 064 Turbo · 064S · brushes from the cleaning range

According to Timemore, you only need to calibrate when the scale has actually become inaccurate. Timemore also advises against leaving heavy objects on the scale for long periods — this can slightly deform the sensor.

1. Rule this out first: level, stable, vibration-free surface; don't weigh while charging (on the Basic 3, Timemore says this can reduce accuracy).
2. You'll need test weights: 20 g, 100 g, 500 g, 1 kg and 2 kg — these are the weights Timemore uses in the official calibration videos.
3. Black Mirror Mini: switch on; while «8.8.8.8» is displayed, long-press the left button and quickly press the right button 5 times → calibration mode. Then place whatever the display asks for: 100 g, 500 g, 1500 g (500 g + 1 kg); then the check steps F1 (20 g), F2 (500 g centred), F3–F6 (500 g right, top, left, bottom) and F7 (2 kg). When «End» appears, calibration is complete — switch the scale off and on again.
4. Black Mirror Basic 3: switch on; as soon as all segments light up, press and hold the Timer button and tap Tare 5 times quickly. Step «0»: leave the scale empty; then 100 g, 500 g and 1500 g, each centred. Then the check: F1 20 g centred, F2 500 g centred, F3–F6 500 g in the corners (back left, back right, front right, front left), F7 2000 g centred, F8–F11 2000 g in the same corners. Lift and reposition the weight before each step and wait for the next display each time. «End» means done — auto power-off is disabled during calibration, so switch the scale off with the slider.
5. If you can't get into calibration mode: the time window after switching on is short — switch the scale off and on again and try again.
6. Basic 2 and DUO: we can't find a calibration guide that explicitly applies to these models either in the manual or in Timemore's tutorial playlist. Watch out for mix-ups: according to its description, the «BLACK MIRROR 2.0 CALIBRATION TUTORIAL» video is for the Black Mirror 2.0 (shown with a stand and dripper ring), and the «Basic Calibration Tutorial» is for the Basic Plus. Timemore doesn't say whether these procedures also apply to the Basic 2 or DUO — please don't try it at random; get in touch with us instead.

Sources: Timemore — Black Mirror Mini Manual (PDF) · Black Mirror Basic 3 Manual (PDF) · Official videos:

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: Never open the scale — according to Timemore, this voids the warranty, and the Basic 3 is precisely calibrated at the factory. Without the right test weights, don't calibrate — get in touch with us instead.

Gear: calibration weights 100 g · 500 g

1. Mini: pressing the Timer button 5 times briefly switches Regular → Pour-over → Espresso. In Pour-over mode, the Timer button starts a 3-second countdown; after that the scale tares and the time runs as soon as the weight changes. A recording only counts as a brew after more than 40 seconds and more than 50 g.
2. Mini, Espresso mode («ESP»): place your cup — the scale tares automatically and starts the timer as soon as drops fall into the cup. When you remove the cup, time and weight stop, the values flash and then reset.
3. Basic 2: Timer button 5 times in a row = auto timer on/off. Pressing the timer once starts a 3-second countdown; after that, the time starts when you begin pouring. The timer only stops automatically if more than 40 seconds have been recorded.
4. Basic 3: slide the side switch towards «M» = change mode (Regular, Pourover, Espresso). Long-press the Ratio button = ratio display on/off (not in Espresso mode). In Espresso mode, the scale wakes up as soon as the weight changes by more than 50 g.
5. Grams ↔ ounces (Mini, Basic 2): after zeroing, briefly press the power button 6 times.
6. Sound and reset: beep on/off = hold the Timer button for 5 seconds (Mini, Basic 2) or 4 seconds (Basic 3). Reset the timer = hold the Timer button for 1 second (Mini, Basic 2) or long-press it (Basic 3).
7. The buttons are capacitive — for the Mini and Basic 2, Timemore advises touching them gently rather than pressing hard. Weighing with a portafilter (Mini): flip the silicone pad over and place the portafilter on it at an angle.

Sources: Timemore — Black Mirror Mini Manual (PDF) · Black Mirror Basic 2 Manual (PDF) · Black Mirror Basic 3 Manual (PDF)

Manufacturer videos on YouTube. They only load when you tap them.

Stop line: If a button doesn't respond at all despite a gentle touch: don't press harder and don't open the scale — get in touch with us.

1. Use a 5 V power adapter with 1–2 A, no fast charger (Mini, Basic 2). The Basic 3 charges at 5 V/1 A; for faster charging, Timemore recommends 5 V/2 A.
2. Not used for a long time or battery completely flat: first charge it from a computer's USB port (low charging current) until the scale responds — then charge it normally with the adapter. Timemore advises not letting the battery run completely flat in the first place.
3. Don't weigh while charging.
4. If it switches off by itself: that's the auto power-off — with the timer off, after 3 minutes of inactivity; with the timer on, after 15 minutes of inactivity (the Basic 3 goes into standby).
5. Water: according to Timemore, the surface of the Mini and Basic 2 is waterproof — even so, on all models don't let liquid get into the gaps or the charging port, and never soak the scale. The Mini and Basic 3 have a silicone cover on the charging port for this — keep it closed. Use the included silicone pad to protect it from heat.

Sources: Timemore — Black Mirror Mini Manual (PDF) · Black Mirror Basic 2 Manual (PDF) · Black Mirror Basic 3 Manual (PDF)

Stop line: Don't open it and don't replace the battery yourself — according to Timemore, this voids the warranty. If liquid has got in or the scale won't charge despite a suitable adapter: get in touch with us.

1. Put the lid on before adjusting the grind.
2. Zero point: turn the adjustment dial clockwise to the stop — that's the starting point «0», the finest setting (on the S3 the «0» then lines up with the red mark). From there, anticlockwise = coarser (C3 Pro, ESP, X lite: count clicks; S3: read the value on the scale at the red mark).
3. C5 (C5 Pro / C5 ESP Pro): according to Timemore, the first 3 clicks are a protective buffer and count as the practical zero point — the finest usable setting is 3 (C5 Pro) or 4 (C5 ESP Pro). One click corresponds to 0.031 mm (C5 Pro, 48 clicks per revolution) or 0.015 mm (C5 ESP Pro). For guide values per brewing method, use the manual that comes with the grinder; Timemore doesn't provide one online for the C5 — if you have questions, get in touch with us.
4. S3: the locking knob on the underside of the grinder is not a grind adjuster. Always keep it fully tightened (clockwise until it won't turn any further) — only then is the «0» correct. Turned anticlockwise, it releases the inner burr.
5. Guide values from «0» — S3 (values on the adjustment dial's scale; according to the lid, 0.015 mm per click): Espresso 0–1.0 · Moka 0.5–2.0 · Pour over 5.0–8.0 · French press 8.0–9.0. In clicks: C3 Pro Espresso 7–8 · Pour over 13–16 · French press 17–20. ESP Espresso 18–24 · Moka 26–32 · Pour over 35–50 · French press 50–60. X lite Espresso 5–7 · Pour over 13–16 (recommended: 15) · French press 17–22.
6. Don't grind at the finest clicks — according to Timemore, this can damage the burrs: C3 Pro not at 0–6, ESP not at 0–10, X lite not at 0–3, C5 not within the buffer of the first 3 clicks.
7. Don't keep turning anticlockwise endlessly: otherwise the burr set can fall out (C3 Pro, ESP). On the X lite, according to Timemore, the inner burr comes out of the body if you keep turning to the end.
8. S3: no more than 30 g of beans per load.

Sources: Timemore — Chestnut S3 Manual (PDF) · C3 Pro Manual (PDF) · ESP Manual (PDF) · X lite Manual (PDF) · Timemore — Chestnut C5 (product page, "Tech Specs")

Stop line: The burrs are sharp. Timemore doesn't recommend disassembling or replacing the burrs or internal parts yourself.

Go deeper: Grinder Lab · Timemore range

1. According to Timemore (S3, C3 Pro, ESP), the spring or the burrs can then get stuck: hold the grinder by the body and gently shake the handle until you hear a click.
2. If that doesn't help: unscrew the lid above the bearing, take out the whole burr set, clean it and put it back in.
3. X lite: if the dial shows «12» instead of «0» at the stop, remove the dial, refit it from the opposite direction and recalibrate. If the grind consistency gets worse: check for damaged parts; if you've removed the outer burr, it may have shifted — refit and adjust it.
4. Clean only with a brush or air blower — according to Timemore, no liquid, not even water.
5. Store in a cool, dry place.

Sources: Timemore — Chestnut S3 Manual (PDF) · C3 Pro Manual (PDF) · ESP Manual (PDF) · X lite Manual (PDF)

Stop line: If it still doesn't click cleanly afterwards, don't take it apart any further. In this case, Timemore refers you to the seller — that's us: get in touch.

Gear: brushes from the cleaning range · Hand grinders