Hi!
I am looking forward to build my first home made 3 axis CNC router although for now still digging into basic concepts.
Maybe it is a silly question, but I can't get my head around this:
Suppose I come to a setup where the XY plane and Z plane drive have different feed rate limitations, for instance a 100IPM bound over XY but only 10IPM on the Z axis. what would happen then if I send a downward diagonal cut ? Will the controller somehow restrict the XY feed rate in order to perform the correct path ? If it is the case, is the XY plane feed rate always bounded by the Z limit or only when Z moves are involved?
Just to give some context to my question, I was thinking about using HDT3M timing belts and pulleys for horizontal movements and a 5mm pitch ball screw assembly over Z (in direct motor coupling mode). Based on my quick calculations this would give me a stepper frequency offset of about 400 RPM between planes. In this kind of setup would it be better to maybe use a lighter stepper on Z, to catch up on the torque curve? I know that one could also stretch the ball screw pitch, but I really want to keep my depth accuracy to a maximum.
Any help with this would be greatly appreciated,
Thanks in advance.
Cheers,