Re:

Joel wrote:

>I'm working on a chopper drive for the motors. I have a prototype up and
>running. So far I've got the current up to 3 amps/phase. With two phases
>energized it's drawing less than 500ma from my 40 volt supply. It's
>designed to go up to 5 amps but I'm stopped here till I get some instability
>issues worked out. It seems to have some problems at certain motor speeds -
>I believe it's caused by the physical resonance of the motor armature.

I'm sure I'm not the only one who'd be interested in hearing what you
chose for a drive circuit, if you'd be willing to briefly describe it.

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
30 Griswold Street, Cambridge, MA 02138
http://www.mdc.net/~stratton
(617) 492-3358 home/shop