I’ve finally 3d-printed and sourced most of the parts - except the electronics -, and have started assembling my mpcnc.
Unfortunately, I’ve forgotten to shorten the lead screw of the z-axis (currently 300mm) and I’ve already fixed it to the 5-to-8mm-coupler and motor shaft. Since, I’ve applied Loctite to the small set screws of the coupler, I don’t necessarily want to loosen them again.
However, the length of the lead screw should be the default 131mm for a workspace z-height of 81mm.
I plan to carefully shorten it while leaving everything connected. Now does it have to be exactly 131mm long, or can it be a little longer (ca. 5 to 10mm)?
I’m asking because it’s nearly impossible to get an exact measurement without taking it out of the coupler.