Originally Posted by
dixdance
My 8" chuck weighs 55 lbs, seems like a lot to hang horizontally on a 4" flange HD. Plus the forces involved in cutting metal are pretty significant. The flex spines look so delicate, or are those things sturdier than they appear?
I'm not too worried for my application, I'll only be taking very light cuts in wood, and my table will be horizontal, and supported by a large cross roller bearing. Seems like one of the smaller (cheaper) drives will be fine.
One question: some of the ebay HD's come with servo motors and drivers - is it asking for trouble to try to use a servo with Mach 3 when the rest of my motors are steppers? Instinctively ot seems like something for a beginner to stay away from, but is it really? Any big advantage to a servo, other than closed loop performance?