I'm running Mach3 in order to drive my G540 and can't seem to get my steppers to spin. I've tried this on two machines, each running the configuration from geckodrive.com.
Machine 1:
In BIOS, parallel port set to EPP+ECP mode
Charge pump not pulling the drive out of fault
Scoped the parallel port, pin 2 (X axis step) seems to be stuck high while jogging
Seems to be activity on other pins... can't remember which
Pulling the plug on the drive causes mach3 to fault... so it seems to see the interface
Machine 2:
In BIOS, parallel port set to EPP mode
Charge pump has no problem pulling the drive out of fault
Something keeps activating mach3's e-stop request... it won't come out of reset
I did some bench testing of the drive... and the motors spin when I just tickle the step pin with a function generator, so this would seem to be a problem on the computer side. I've also tried bi-directional mode on machine 1 and it doesn't make any difference.