Original post copied here....
Debounce set to 1000 - done that! Did no good. Probably something that I'm totally missing but I cannot see this problem on the machine end.
This machine conversion has failed. I cannot get past the "limit switch activation" in Mach3 and after spending a week on that problem alone, there is nothing left. The "combo board" wiring has been checked time after time and the limit switches have been totally rewired a couple of times with shielded wire. The servo motors run fine, no noise and will fast feed, just not very long. I have been able to home the axis and begin to run the 'roadrunner' then - 'plunk '- reset. The spindle has not even been started - cannot get past the limit switch problem and set-up.
I have read here and there about this problem and have tried everything that has been suggested. The hours spent are beginning to seem like a total waste.
What fails? The Combo Board? The cable from LPT1? (actually tried another of those). Cannot see what else could possibly be done with the limit switches and wiring - they are just switches! I don't detect any noise on the limit switch leads with an oscilloscope although they are advertised as 'floating ground' - I do see that they in fact are. The switches are series wired on each axis with a common ground and are active high with a 470 ohm resistor from the 12V at each input to the signal input.
I have other components to get working like a pendant and a VFD spindle drive but cannot even begin to start on them!
BTW - hello everyone! ..... and looks like goodbye at the same time. Can't get it to work after all the serious precision conversion with ball screws, servo motor mounting and set-up....
Thanks,
Bill Clemens