Greetings all. I'm building a ~ 4"x3" 8020 machine, and using ~32mm ballscrews and THK precision linear rails. I have 2 precision ballscrews outta a decommissioned mill that are matched in every way but length. My impulse is to just dual-drive the x axis to avoid any chance of racking, but my gantry will be, it seems, very rigid, so perhaps centerdriving would be the way to go. What would you do if it were your machine?
Heres a sort of mockup photo to help with your visualization. Linear bearings not pictured, the steel rail wont be used there