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Z-Axis Coupler Replacement

The Z-axis coupler is responsible for the platform’s movement along the Z axis. Therefore, if the platform does not move at all or it moves with difficulties and makes unusual noises, the Z-axis couple needs to be replaced. Before replacing the coupler, make sure that the screws on the coupler are properly tightened. More details can be found in the manual.

If the screws cannot be fully tightened, follow the steps from this manual to replace the Z-axis coupler.

The following manual shows the M200 repair 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.

Unplugging the Z-Axis Motor Cable

Unplug the Z-Axis motor cable.

Loosening the Z-Axis Coupler Screws

Loosen the three Z-Axis coupler screws placed on the Z-Axis motor side.

TURN THE Z-AXIS SCREW TO GET ACCESS TO EACH Z-AXIS COUPLER SCREW.

Unscrewing the Z-Axis Motor

Unscrew the two screws that secure the Z-Axis motor. Remove the motor with its distance piece. Remove the two big screws from the housing.

Z-Axis Coupler Removal

Loosen the three Z-Axis coupler screws placed on the Z-Axis side. Remove the coupler.

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

Z-Axis Coupler Assembly

Install the Z-Axis coupler in its place and tighten the screws placed on the Z-Axis side.

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

Z-Axis Motor Assembly

Insert the two Z-Axis motor screws in the housing, hold them and put the motor with the distance piece on them. Next, tighten the screws.

Tightening the Z-Axis Coupler Screws

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

TURN THE Z-AXIS SCREW TO GET ACCESS TO EACH Z-AXIS COUPLER SCREW.

Plugging the Z-Axis Motor Cable

Plug the Z-Axis motor cable in.

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.