Re: DC Surplus Motors

--- In CAD_CAM_EDM_DRO@y..., Drew Rogge <drew@p...> 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@p...

Drew & others:

From what I'm reading here, this sounds like a great spindle motor
for a homebrew mill like the "Heavy Iron" project in Nuts & Volts
mag. This being a DC motor, does it run properly without any further
electronic parts on AC line power...just the included controller?
Forgive my dumb questions, please.

Thanks,
Milton