I'm designing / building a 2x3 machine to route wood and occasionally mill pcb's.
At first I thought R&P would be the better route - no bent screws, no whipping, and possibly less expensive?
After thinking about the z-axis, I'm having second thoughts about R&P. Does anyone have any recommendations or experience here. I'm thinking screws will be more accurate for pcb milling, but will severely limit speed when routing wood. What if I venture into routing aluminum? Which drive mechanics will be better?
I thought I'd invest in linear bearing guides to improve rigidity (and accuracy?) for pcbs.
Is overall weight more important?
Thanks in advance for any comments or suggestions.