Re: [CAD_CAM_EDM_DRO] What is adequate for a stepper motor?

I ran my Shoptask with some 260 in/oz motors for a while and it worked, but
the feeds were what I would consider marginal. The Z actually requires a
pretty stout motor. You do not the reduction benefit of a screw on that
axis. It's effective reduction is slightly more than the X or Y but not as
much as you may think. So, I would say that 300 is about the minimum I would
suggest.

Tim
[Denver, CO]

> I'm planning to CNC my shopmaster when it arrives as well as a
> mill/drill I picked up. In my parts bin I have a few double stack
> Nema 23's which are supposedly 100 ozin, 1 triple stack 23 which is
> 150 ozin, and a couple of little 17's. I suspect that none of these
> are adequate (well, for the Z direction of the mill/drill if I
> attached to the current fine feed wheel, even the little 17's would
> probably do OK actually). So I'm looking for some 34's (since that
> what will bolt to the Shopmaster anyhow) and I've found some double
> stack 34's Superior Electric 300 ozin. I'm planning on using a 63
> volt supply. Would these be adequate for both applications?
>
> I'm not bent on ultra fast rapids, but I don't want it to be turtle
> slow either. I could get the motors for about $60 each which I'm
> guessing is a half decent price.
>
> Any comments?
>
> Thanks,
> -Chris