Re: [CAD_CAM_EDM_DRO] No movement

On Saturday 14 August 2004 06:42 pm, Gene wrote:

> I am still trying to get my machine to move. I can get EMC to home by
> tripping the home switch's by hand, The letters turn green and start
> counting when I push Jog, but no movement of the motors. The I/O show
> script shows the pins changing colors and reacting to the jog commands.
> On the geckos I get 1.56 volts between the +5 term. and the step term,
> and 4.65 volts between the +5 term. and the dir term. The power terms
> show 46 volts and the motors are locked up. Is there something in the
> ini that could cause this. The parallel cable from the puter to the
> breakout board came off a working machine. Could it be a bad breakout
> board?

Measuring voltages there isn't going to be nearly as helpful as knowing what's
going on. For those step and dir pins, particularly. I realize that a
scope isn't exactly a trivial matter to acquire, but maybe a logic probe?
Maybe build something simple? There are schematics out there, I'm sure...

That 1.56 volts in particular doesn't sound like a valid logic level but might
be what a voltmeter would say if it were looking at a train of pulses. Try
the meter on AC instead of DC and see how the reading changes, that might
tell us something.