Hmmm I think I am stuck now:

- I have checked my wiring several times (including continuity testing to make sure I haven't crossed any on the signal wires in error) and everything seems to check out.
- My drivers have their green lights lit.
- The breakout board seems to be responding on the axis correctly i.e. I use a jog key in Mach 3 or run the Roadrunner.tap GCode and the activity lights on the axis outputs seems to be lit when they should.
- I've tried the enables 1 to 3 ticked in the mach3 Outputs tab on Pin No.1 using Active Low ticked and unticked and using Pin 1 as suggested in the BoB instructions (when I have these checked the diagnostic screen in Mach3 is showing 3 red "LEDs" for each
- Tried 25000 and 35000 Kernel speeds (35000 is the setting suggested in the instructions)
- Checked to make sure the parallel Port's address is correct
- Checked and re-entered the Motor profiles for each axis as per the BoB manual, although I notice my G's value doesn't match theirs

Anyway all of that and each time I switch the machine on the steppers lock in place with a kind of high pitch hum and refuse to move, as if there is constant power going to them but no direction.

If anyone has any suggestions I'd be grateful , as I think I'm either missing something very fundamental, got some defective parts or some arcane setting in Mach3 is eluding me and I'm running out of things to try.

Cheers


Chris