I finally got my mill so I can get underway with my addiction/new hobby.
I've been reading and reading and reading and can't find what I'd call a definitive answer on timing pulleys, specifically what ratio I should be using and what kind of motor I should get. (The machine is pretty big by most cnc hobbyist standards and it will take pretty big motors I'd assume)
I have a few emails out right now to various suppliers like Kelling, but no replies as of yet.
I was just curious as to which motor style I should get - a stepper or a servo with encoder. I constantly hear of missed steps etc are the servos that much better? What size of motor should I be considering? I want a stronger/bigger motor than you'd normally use because I plan on using it a LOT.
Am I to understand it correctly that a 4200 RPM servo motor, 4 pitch ballscrew and timing pullies with about 4.28:1 (14T/60T) - in theory should produce 245 IPM in a perfect world? (under no load, wide open)
Just in case anyone was wondering how I came up with those numbers...
4200 RPM X .250/rev = 1050 IPM with no gear reduction.
1050 IPM / 4.28:1 gear reduction = 245 IPM rapid?
Or am I not even in the ballparK? ideas? Suggestions?
Edit - for the record, this machine is just like Chich2's HAFCO shown HERE.