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@...
>
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