Re: Stepper Drivers

> From: Jon Elson <jmelson@...>
> I would suspect that no manufacturer gets away with this anymore in
> industrial equipment,

Both Servo Dynamics and Advance Motion Control make systems that run directly
off the line (no isolation transformer). How they do it? I don't know...

See:

http://www.servodynamics.com/smba/sdsmc1525-17.htm
They make several model that run off the line.

and

http://www.a-m-c.com/
Some of the PS1600 series supplies are just a bridge and a cap.

Apparently they have some way of "de-referencing" ground (?)

Matt