Hi all,
I built the tachus unipolar driver board and it was working perfectly.
After abandoning it for a year and when i tried to reuse it the problem arised:
The only working axis is the Z axis, X and Y didn't work. I checked the Dir and Step pins in mach3 for each axis and they were set as they should.
I substituted the 74hc14 IC with a new one, the 4030 and 4013 IC's but in vain.
Please may someone tell me how to troubleshoot this problem and what might be the cause.
Thanks in advance