Step1. Mount the Z nut on the X-axis left end from bottom to up, fix with M3 x 6mm
screws.
Step2. Mount the linear bearing on X-axis motor end from bottom to up. Fix it up
with M3 x 6mm screws.
Mount the endstop trigger
1. Thread a M3 washer> spring> M3 washer in order to the M3x30mm screw.
2. Thread half of the M3x30mm screw into the screw hole.