Hello all,

If you really want a look at the top of the line in stepper motor and
servo motor designs take a look at http://www.compumotor.com when only
the best will do I use Compumotor.

Having tried many commercial designs, and finding that most performed
poorly or not at all. Seeing Roman's design, he has worked out most of
the bugs I have found in many high end (so called by their Mfgs.) motor
drive applications.

The only commercial people willing to come on site and work with us,
were the people from Compumotor. These motors are for the high end of
things where precision counts, and most applications won't warrant the
expense, but I find Roman's prices very reasonable for the product he
has designed. So thumbs up to Roman.

Vern Jones, Sound Research htp://www.foothill.net/~soundres

Spehro Pefhany wrote:
>
> At 02:52 PM 2/10/2003 -0500, you wrote:
> >I've looked at the lini-stepper, and might use it if there was profit to be
> >had in this project. 3 Axes worth of linisteppers gets expensive though,
> >especially for such small motors. What I'm doing now is pretty close and
> >only costs about $10 per axis total. It may be that in taking the next step,
> >the linistepper may be a bargain - but I just haven't gotten there yet. I'll
> >look harder at using Roman's design...
>
> Chris:-
>
> If you really need high performance, you might want to look at DC servos
> rather than steppers. With a built-in optical encoder (and some drive
> circuitry) they can "look" just like a microstepping PWM stepper controller
> to the driving software. Steppers have issues with resonances and such like,
> as well as the obvious one of getting enough drive current due to winding
> inductance.
>
> Best regards,
>
> Spehro Pefhany --"it's the network..."            "The Journey is the reward"
> speff@interlog.com             Info for manufacturers: http://www.trexon.com
> Embedded software/hardware/analog  Info for designers:  http://www.speff.com
>
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