Does anybody have an opinion or experience of the variation of the Z-height as a function of the position of the Y-axis?
Below is a graph. The Z-axis height is measured relative a reference surface plate (with an accuracy of 2.8 microns). As can be seen from the graph we have an almost sinus shaped variation of the Z-axis height. The period of the “sinus” curve matches the pitch of the Y-axis leads screw. The variation is about 5 microns at max. Is this (sinus shape) normal?!
The CNC router is a type with a gantry. See photo below. For the sake of clarity, my primary use is for PCB etching.
Regards
Bo