Re: Stepper on a spindle

Big problem is when you want to run "normally", that is, set
the spindle turning and keep it going forever while the other
axes follow instructions. But if it is supplied with steps from
an independent source, should be no problem.

You'll want to think about steps/revolution...

If you want resolution of .001, on a 10-inch diameter workpiece,
you'll need roughly 31,000 steps/rev; at 10-microstepping using
motor spec'd at 200 full steps/rev, you'll need a 20:1 reduction
ratio. Using Mach3 with 25,000 step/sec pulse rate, you'll get
spindle speeds in the area of 1/second or 60rpm.

/mark who has been there