Got it working!! Mostly.....
Deleted and re-loaded Mach 3 and add-ons. Re-configured Mach to match my system. Still no action.
I went to BuildyourCNC, Patrick Hood-Daniels' amazing site with info on just about anything CNC you can imagine.
I re-visited the setup videos for the electronics, and decided I must have a grounding issue. Started checking voltages and
stuff, and sure enough - my enable circuit to the emergency stop switch had a broken connection!! How stupid is that??
So I fixed that, fired it up, and found more fun stuff! Mach and the Xbox add-on have changed. Reconfigured both, and the
Xbox now won't keep the Y from moving when I move X, and vice-versa. Messed with the settings, no joy. And the jog
buttons won't work in the continuous mode. But I can move the DROs with the joystick, so OK.
But the motors STILL won't move!! So I verified that the LPT was working by using Patrick's method: Go to the
direction pin, put your VOM on it, move the axis and see if it goes to 5 volts in one direction and 0 in the other. YES!
My LPT is actually working!!!! YEAAA.
So, in messing with the pin settings, high and low to check voltages, I found that if I set the steps low and the directions high,
THE MOTORS TURNED!!!
Now this is very strange, because I had them working fine with steps and directions low. Plus, if you change high to low, won't the
directions just be reversed??? Anyhow, I appear to be heading back to operational.
Lesson learned: It's pretty easy to check (verify) that your LPT is functional and talking to the breakout board by checking the pin
voltages at the board when you toggle the axes back and forth. Just look for 5 or 0 volts DC on the direction pin. I suppose
if you have an oscilloscope you could watch the pulses on the step pin, but I don't know what you would see with just a VOM.
And yes, the Port pins indicator still doesn't see any action, so don't rely on it too much!!
Oh yes, I have also learned that this hobby ain't for sissies!!
Thanks for the Mach program and this site. AWESOME!!
Dave