Re: 7A, 80VDC 10 microstep drive

Bob,

No, the drive does not automatically reduce current. This can be done
by switching in another current set resistor while the G201 is
stopped using an opto-coupler whose emitter goes to term. 12. The
collector would connect to one end of this resistor while the other
end would go to term 11.

I admit this is rather a kludge; in the next iteration of the board I
will try to do this internally. Thank you for the suggestion.

I am presently finishing up a design of a brush-DC servodrive (G320)
that will emulate a step motor. It will be the same package size as
the G201, and likely the same price. The ratings will be 20 Amps, 80
VDC, true PID (albeit analog), +/- 128 count servo lock range, step
and direction inputs, no tach required, pulse by pulse current
limiting, will power the quad encoder so long as 5VDC current
consumtion is 50 ma or less, etc. This would place it in the 1-2 hp
class.

Prototypes will be available for beta-testing end of this month, if I
haven't screwed up the PCB layout.

Mariss Freimanis
Geckodrive Inc.