Cheapish CNC machine

[techhelpbb]

Originally Posted by cadandcookies

140 oz-in NEMA 23 steppers (or 60 oz-in NEMA 17 steppers)...
120 oz-in NEMA 23 steppers...
175 oz-in NEMA 23 steppers

Course you might not be able actually get those mechanical results without electronics that insure at full step enough power is supplied. Once you microstep all bets are off.

If 750W is about 1HP.
A 1500W spindle is 2HP.

Now the important questions about the spindle are:
1. At what RPM is maximum mechanical power output? Does the motor driver effect that?
2. Is that RPM a good match for the feed rates these NEMA23 steppers can deliver and honestly the answer in all 3 cases is likely no.
So the quality of cut and the tool life will diminish. Though obviously the results can always be good enough and someone could always get more tools.