Originally Posted by
hemsworthlad
To be honest there's too meny variables to give any advice at this time without being connected to a machine.
I would recommend you build the new machine and see how it performs this time round.
If the parallel port was giving 5v and not 3.3v then I doubt latency was the problem and there's so meny other problems which could have caused it.
Carve one had a similiar problem and if I remember mariss fremarnis found the problem and it was something like the A+ A- & B+ B- wires on one of the motors was wrong way round causeing the pulse's to never reach full width before next pulse came along, effectivley causing missing steps.? Check C1 build.!
Good luck.
Mariss asked me to check the DIR signals at the two X axis G203V drive modules (X and A) to verify that the voltages were 0v (< 0.3vdc) in one direction and 5v (> 4vdc) in the other direction. They were not meeting those conditions and the voltages were abnormal for TTL logic. I found that there were a couple of check boxes in the Mach3 Output Pins tab that were incorrect. Once those were corrected the step-over problem I could not figure out for months permanently disappeared.
I don't remember which settings they were now, but I'll see if I can find the info I posted in my Work Table CNC Machine log.
CarveOne
CarveOne
http://www.carveonecncwoodcraft.com