Re: Re: What makes a motor a servo?

> Hmmm, I agree that servos far exceed steppers in performance. It's
> almost impossible to find anyone who uses steppers anymore for
> commercial CNC or any high end motion control application(please prove
> me wrong).
>
> There is always the uncertainty that steps will be lost in a stepper
> system. Mariss is tackling this by developing a stepper driver which
> will correct for lost steps. But now we have a system which is every
> bit as complicated as a servo system with the weak performance of a
> stepper system. I think the best solution would be a good source for
> chinese brushless motors(with encoders), and an inexpensive digital
> drive with AC commutation and "wake and shake" capability. This would
> provide unbelievable power and speed, while being extremely reliable
> and zero maintanance (and no need for hall sensors). I'm sure that
> Mariss could develop a drive if there was a source of cheap brushless
> servo motors. But it appears all we have are lemons(steppers), so
> we'll have to make lemonade :(
>
> P.S. Mariss, you said you were working on a brushless controller at
> one time, is that idea dead?

Rutex already do one and have done for a while.

http://www.rutex.com/home/R992H.htm

John S.



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