How to align the Z axis (BCN3D Sigma)


Allen Key 2mm
Allen Key 2.5mm
Allen Key 3mm 
Socket driver 8mm 


If you hear strange squeaking noises coming from the Z-axis, even though you already lubricated it, it's time to realign the Z-axis. It doesn't happen so often, but it can happen over time. Follow the next steps to realign the Z-axis:


1. Go to Utilities/Maintenance/Move printing platform and move the printing platform to its middle position. 

2. Take out the central bottom cover screw-iconx3 M3 8mm

screw-iconx2 M3.2 9.5mm


3. Partially loosen the clamps that hold the Z-axis sidebars, both upper and lower clamps, and the screws that hold the Z motor.

spacer-iconx4 Set screw M6

screw-iconx4 M3 6mm 

IMG_20201014_155920 (1) IMG_20201014_155756 (1)
4. Partially loosen the nuts that hold the clamps, you'll see they admit some horizontal movement. nut-iconx8 M5 


5. From the Move printing platform menu (Utilities/Maintenance/Move printing platform), lower the platform to its bottom position. Once in the bottom, move it back up all the way to the top

6. Repeat the previous step a couple of times to align the Z-axis.



To reassemble again the axis, follow the previous steps from step 4 and in reverse order.

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Repair didn’t go as planned? Check out our forum community for troubleshooting help.


It's important to keep your printer in good shape to make the most out of it. In this chart you can find a list of the extruder maintenance procedures and how frequently these should be done. Maintenance Plan.


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