Re: servo vs. treadmill motor

I did a non-destructive dissection of one of the treadmill motors and
was impressed by the quality of the brush assembly. It had a solid
brass rectangular holder that enclosed the brush and there was little
slop. And they are replaceable. I've ordered a G320 and will give it
a shot anyway. I have a feeling it will work fine. Whats the fun if
there's no gamble. ;-) There's just enough of a ~1/4" shaft on the
opposite side to mount a USdigital encoder.

-Lee

--- In CAD_CAM_EDM_DRO@y..., Mark Fraser <mfraser@h...> wrote:

> The advantage will be the brush arrangement. In the treadmill
> motors (I assume the enclosed DC ones, not the open frame GE ones)
> the brushes are sort of sloppy in their guides, and when they run in
> one direction, the commutator wears an offset pattern in them. This
> gives the trailing edge a sharper shape, and when you reverse the
motor,
> this can grab a groove in the commutator. This is a real
phenomenon,
> as Marcus (frequent and valued contributor to this group) knows for