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Z-Axis Coupler Tightening

The Z-axis coupler is responsible for the platform’s movement along the Z axis. If the platform moves with difficulties and makes unusual noises, the screws on both sides of the Z-axis coupler need to be tightened. Follow the step from this manual to see how to gain access to the coupler and tighten the screws.

If tightening the screws does not help, the Z-axis coupler or the Z-axis motor needs to be replaced. See the manuals: Z-axis motor and Z-axis coupler.

The following manual shows the M200 maintenance work. For the M300, these procedures are the same.

Unplugging the Power Cable

Turn off the printer and unplug the power cable. Wait a few minutes for all the capacitors to discharge.

Changing the Printer's Position

Grab the printer’s housing and change the printer’s position so that you can easily access the bottom plate.

Unscrewing the Bottom Plate, part 1

Unscrew the screws that secure the bottom plate on one side of the housing. Use a 2.5mm Allen key.

Turning the Printer

Turn the printer over.

Unscrewing the Bottom Plate, part 2

Unscrew the screws that secure the bottom plate on the other side of the housing. Use the same key.

Separating the Bottom Plate

Separate the bottom plate from the printer and unplug the bottom fan cable from the motherboard.

Providing Better Access to the Z-Axis Coupler

Unfasten the two extruder cable straps and unplug the cable from the motherboard. Next, unfasten the third strap. Place the extruder cable between the power supply unit and the housing. Finally, grab the cables next to the motherboard and fasten the strap.

This step is not necessary to follow, however it is recommended so as to avoid the risk of damaging the cables and to get better access to the Z-Axis coupler.

Z-Axis Coupler Screws Tightening, part 1

Tighten the three Z-Axis coupler screws placed on the Z-Axis coupler side.

Turn the Z-Axis coupler to get better access to each screw on the coupler.

Z-Axis Coupler Screws Tightening, part 2

Tighten the three Z-Axis coupler screws placed on the Z-Axis side.

Turn the Z-Axis coupler to get better access to each screw on the coupler.

Rearranging the Cables

Rearrange the cables to their original position: unfasten the strap next to the motherboard. Secure the extruder cable with the first strap and plug it in. Fasten the remaining straps.