Re: Tawagawa Seiki steppers

Thanks Alan,

That might be the limiting factor, the lower torque. Good for
instruments, not enough torque for "cutting metal", as you say. The 3
phase would be a possibility also. I'll watch the surplus here, never
know, I might find some!

Thanks for the comments.

Alan KM6VV

Alan King wrote:

>
> Well, it's a bit hard to find 5 phase motors larger than NEMA 23 and
> about 1 A ratings, they are mainly light/medium duty high
> precision/smoothness..
> More importantly, I have it mentally filed away that they're largely
> super ceded by 3 phase hybrid motors. Don't remember off hand what site
> etc the info came from, but remember it was on good authority and made
> sense, and look up hybrids again if and when high smoothness or
> precision is needed. There were 5 phase and 3 phase variable reluctance
> motors, then someone came up with the hybrid motors. Foggy on the exact
> details, but the reason you don't see lots more and larger 5 phase
> motors was because the 3 phase hybrids had basically all the same
> advantages, with the extra advantage of less driving electronics. 5
> phase motors were kind of a specialty item before that, and are now a
> niche item that are only used in a few cases. (I think none of which
> tended to be helping other parts chew through metal..)
>
> Still could be worth it for certain things, especially if 1000 half
> steps per rev is enough to eliminate gearing etc and the load is light
> enough.
>
> > Hi Alan,
> >
> > Now this is useful. I guess it's been a few years since I read Jones on
> > stepping motors! One coil is always breaking? And that acts like a
> > damper? Sounds like some nice motors for CNC, if you can find/build a
> > driver. Thanks for the comments! Now to find a set of motors...
> >
> > Alan KM6VV