Re: [CAD_CAM_EDM_DRO] DC Surplus Motors

>
> Drew, et al,
> A note of clarification:
> The info below is largely for the older GE motor and controller
> no longer available from Surplus center.
> The new motor and controller is 90VDC permag with a KB electronics
> controller. The two types function the same but the parts cannot
> be swapped around. The KB is much superior to the GE.
> I have both types and they are good stuff.
> Rich D.
>
> Drew Rogge wrote:
> >
> > Just a note for anyone interested in getting into the treadmill
> > motors at Surplus Center.
> >
> > These motors have been discussed pretty extensively in RCM over
> > the years. You can search the archive at google and come up
> > with a bunch of info. In particular the URL:
> >
> > http://groups.google.com/groups?hl=en&safe=off&ic=1&th=1871dbd6bf968e95,
> 11&seekm=8252tc%24ikb%241%40izalco.d-and-d.com#p
> >
> > will get you a discussion on how to reverse the direction of the
> > motors.
> >
> > Also there are various file format flavors of the schematic
> > of the motor controller at:
> >
> > http://www.metalworking.com/dropbox/_1998_retired_files/
> >
> > Look for treadmot.???. Also the file treadmot.txt talks about
> > two mods which have been worked out for the motor. The first mod
> > is to remove one of the transistors (pretty sure it's T3) on the
> > board which defeats a "feature" of the controller which prevents
> > the motor from starting unless the speed control pot has been
> > turned down to zero. The second mod is to cut a trace running to
> > pin 6 of the control chip and then connecting the pin to ground.
> > This change bypasses the "slow start feature" of the controller.
> > Both of these features make sense for use in a treadmill but
> > may not be applicable when using these motors on a machine tool.
> >
> > Have fun,
> > Drew
> >
> > --
> > Drew Rogge
> > drew@...
> >