At 06:13 PM 6/7/2008, you wrote:
>On Sat, 2008-06-07 at 13:32 -0700, Kirk Wallace wrote:
>... snip
> > I can certainly try, but I am using the latest 2.2.5 which should be
> > fixed. I have pwmdir set true. I measured only logic levels on the dir
> > pin and analog on the PWM pin. The no load forward and reverse RPM
> > through the range (0 to 5500) was within 50 RPM.
> >
>
>These are a little embarrassing, but here are some pictures of my
>Pico/Pluto setup:
>
>http://www.wallacecompany.com/machine_shop/Pluto/
>
>The cores of the inductors seem to be heating and not the copper, so it
>takes a while for the heat to be detected. It seems that one or the
>other inductor heats up dependent on direction of the motor rotation. I
>seem to get no heating at zero speed and have only done brief testing up
>to 30% speed.
>
>The upper trace is the PWM signal at the amp connector. The lower trace
>is the direction signal at the amp connector.
>
>--
>Kirk Wallace (California, USA
>http://www.wallacecompany.com/machine_shop/
>Hardinge HNC/EMC CNC lathe,
>Bridgeport mill conversion, doing XY now,
>Zubal lathe conversion pending
>Craftsman AA 109 restoration
>Shizuoka ST-N/EMC CNC)
Kirk,
Looks like you have one of those Surplus Center DC motors in
the third picture. I've got two of those, and they're going to be
powering the saws on my saw beveling machine. BTW, your bench looks
not better or worse than mine... ;-)
Mark
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