What is the gantry made of? How much weight are you going to be pushing around? How many TPI on the R/P?
Properly geared, it might be possible - but... my gut feeling is that you're going to be a lot safer and happier with some NEMA 34s. Even 200 IPM rapids are going to feel very slow when you're homing on that 8' table. For a table that size, I'd definitely consider servos as well.
Are there any DIY examples here of a big table, R/P and similar steppers? I can't imagine there are any commercial machines using motors that size - but I could definitely be wrong...
Steve |