Re : motor woes

> steve@...
>
> Has anybody used Astrosyn 8 wire T180 universal motors?
>
> Specs are as follows - 12v 0.6 amp/phase Res 20 Ohm/phase
> Inductance 35mH/phase Torque 5.5Kg-cm.
>
> I can't get the damn things to run at anything above a crawl
> without missing steps!!
>
> I'm running them in unipolar mode with a home built
> controller based on UDN5804B's

This is no surprise. 12V motors have to have a LOT of inductance.
Runing them unipolar makes it even worse. What is your DC supply
voltage? Is this an R/L drive or chopper type?

Jon