In most cases, weird Z-axis movements could be caused by wrongly set parameters. You can easily solve this by re-importing the parameters of the mainboard (The file can be found in the U disk that came with your engraver).

If re-importing the parameter has failed, follow the steps below to reset the laser head’s origin first, which is necessary for further debugging.

1. Power the engraver off.
2. Manually move the laser head to the middle along the Z-axis by turning the threaded rod of the Z-axis.
3. Reboot the engraver.

Normally, the laser head should start to move toward its origin along the X, Y, and Z axis, then retract a little, back to the origin, and finally retract a little, which means the origin resetting has finished.

Meanwhile, the button is glowing green. Now, identify and troubleshoot your Z-axis problem(s) against the problems listed below.

Noise following Z axis returning to origin>>

Z axis slowly moving down after powering up>>

Non-responsive Z axis after powering up>>

Z-axis not moving smoothly and making noise>>