James there won't have been a Bug it will down to poor connection on the direction pin. Or you have the active pin state set wrong in Mach3 for that axis.

I remember you sending me pics of the wiring 4 or 5yrs ago and it was a rats nest so if this is still the same that won't help matters. The wiring diagrams I sent you at the time I couldn't make any simpler so why your having this trouble is beyond me.?

Did you get my return email saying send me the stuff including the control box and I'll wire it for you.?

If this isn't an option then send me details of what drives and BOB etc you have now and I'll do you another diagram that if you follow to the letter WILL WORK. . . . . Getting this going shouldn't be that hard.