Re: Camtronics/Gecko troubleshooting

Monte,

Both the phase A & B signals should swing from gnd to greater than
2.4 volts, actual spec is 0.4 volt or less is gnd signal, 2.4 volt or
grater is logic 1. Looking at the USDigital's spec, phase A & B are
identical pulse width, but A leads B by a 1/4 cycle.

Looks like one phase isn't working. Care to try another motor?

Bernard

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Monte Westlund
<montejw@e...>" <montejw@e...> wrote:

> Bernard,
> > What you are saying is correct, without the Arm pins connected
> there
> > is no power to the motors and with the encoder connected as you
> > describe the Fault LED should turn on if you manually turn the
> shaft.
> >
> > As you are limited to a Multi meter, there aren't a lot of tests
> you
> > can make. One thing you can do is check power is actually
> arriving
> > at the encoder, I presume you are using the 600oz" motors from
> Dan.
>
> Supposed to be some 400 oz-in that he just got and hadn't listed
> them on the web site yet.
>
> > The two loops at the end of the encoder connector are gnd and +5.
> > Make sure that you have power there.
>
> There is 5v across the encoder + and - leads, if that's what you

are

> talking about.
>
> > If so, you might find a Tandy
> > open, so buy a 470 ohm resistor and LED and check for pulses on
> the
> > Phase A & B pins while you spin the motor.
>
> Tim suggested I measure the voltage across enc- and each of the
> phase wires. One side goes from 5v to 0 as I turn the shaft, the
> other side stays fixed at 5v.
>
> >
> > Hope this helps.
>
> Me too.
>
> Thanks,
> Monte