MESA 5i25/ 7i76 connect to M542T stepper driver

I am having an issue getting my new 7i76 to connect to my driver - when connecting the driver to a parallel BOB - it works fine. I added the mesa config lines from pncconf to my existing hal/ini files for the "B" axis and connected the driver to the stepgen.03 outputs (gnd + Pul+ / Dir+) and the driver is not moving when i try to jog the "b" axis.

the driver is a M54T from www.omc-stepperonline.com

I have included my ini/hal files - any suggestions would be appreciated.

I am converting from a plain parallel bob to mesa and am doing it bit by bit - this axis will be the first.
Thank you!

I didn't notice any obvious errors in the hal/ini files
but the M542T manual says this:

For reliable response, pulse width should be longer than 1.5μs

So you might try setting the step pulse width to 2 or 3 usec

Hmm, I was looking at the manual for my DM542A which seems to be the same controller. I noticed that in some BOB installs on CNCzone guys mentioned they had to connect ground to the step and direction. Perhaps thats why I never got the drives working on a BOB with LCNC but I've driven them from an Arduino. The wiring is documented in the instructions and I made a mental note to be prepared for problems when I wire them to my Mesa 7I76E in the next week or so. I'm wondering if the Mesa sides with the Arduino or with Mach3 BOB.

ok - so i increased the steplen/stephold to 2500 - no change. (BTW 1800 worked on the parallel BOB)

I also tried various ways to connect the 7i76 to the driver:

1) 7i76 pul-/pul+ --> Driver step-/step+
2) 7i76 GND/pul+ --> driver step-/step+
3) 7i76 pul-/Vcc --> Driver step-/step+

(Did the same with dir as well)

No difference. the UI will jog the "B" axis just fine - nothing happens on the motor end.

Also - tried to invert the signals as well - hal/ini attached...

Any other troubleshooting steps???

You might check the B direction pin to see if it changes when jogging different directions
just in case there might be some hal issue

Also you might try a longer step length (parallel port step lengths are often a few usec longer than programmed due to access time issues)

Another thing to verify is that the 7I76 5V supply is within specs

ok - so increasing the steplen/stephold to 3500 from 1800 worked. Does this mean that I will need to increase the steplen/hold for my other drivers as well? I guess I will find out.

Note: for others - it works with simple wiring - Pul-/Pul+ -> Step-/Step+ and Dir-/Dir+ -> Dir-/Dir+ - and with the increased steplen/hold times i get a consistent stepper movements.

Thank you for the suggestions!