New build
Clearpath SDSK motors aren't responding to step and direction signals from the PMDX-126. I'm using Test mode of the PMDX-126.
I don't see the signals from the PMDX-126 in the clearpath software gui, not completely I should even be able to, But FWIW the drives work fine using only the MSP software. Auto Tune and jog work fine.
What I can see visually is that the LEDs on the PMDX board are blinking as I would expect, DIR coming on and off with each press of the test button (while in TEST mode) and STEP barely illuminating and getting more intense as the pulse train ramps up. It matches what I see on the scope.
I looked at these signals with a scope looking for pulse duration (which is fine) and just to better see what was actually happening and thats when I saw the low volt signal. I understand that excess current would drag the signal down, but the specs look like the board should be able to provide what the Clearpath requires and I know some other folks have this working.
I don't have a current probe for this scope so I can only read the DIR signal's current with a meter, I can do that tomorrow just to be sure its not dragging the voltage down. FWIW I did reverse them with the config dip switches and the results were the same. Its also of note that the PC +5v pin is fine the whole time.
The Clearpath motor is set for Step and Direction -doesn't appear to have any other options available, they are greyed out in the software. I never saw any way to tell it what signal types to look for but I was hoping there was such an option in there somewhere.
Set for 800 Pulses per rev, as delivered.
Again, the pulse train occurs as it should and direction toggles properly as well, its just that the voltage on the signals is too low. Anyone else seen this or did I connect or jumper something wrong? I saw in the book that in some cases a 1k resistor is placed across the signal and ground, but that would only cause more current loss.
Ideas please?
https://www.pmdx.com/PMDX-Forums/ind...tach=729;image