Stepper motor for spindle?

[blades]

Would this even be possible?
How would it be controlled?
Would you still need a rev counter to read spindle pulses for threading in Mach?

I don't want to hear how impractical you think it is, just looking for feasibility and playing with an idea. Thanks!

[Al_The_Man]

Stepper motor as a spindle motor
Al.

[blades]

Thanks Al!

[kawazuki]

Hoss did a stepper driven spindle purely for tapping - just slackened the main spindle drive belt and drove the spindle geared down 4:1 with a smallish stepper - worked well enough to tap all the holes on his fixture plate thingy!

[blades]

Hoss did a stepper driven spindle purely for tapping - just slackened the main spindle drive belt and drove the spindle geared down 4:1 with a smallish stepper - worked well enough to tap all the holes on his fixture plate thingy!

So it wasn't the primary spindle drive motor, but rather a secondary one.... interesting concept! Not surprised Hoss did it.