Originally Posted by
mackeym
Thanks for the tips Iron-Man!
I sorted out the wires and tried a couple different parallel port settings and it seems ok now. I tried my new parallel port cable with shielding and including the encoder input directly into the parallel port. It seems to be working when a lower pull-down resistor (1Kohm or 500 ohms) is used. The weird thing is mach3 encoder readout is accurate when I jog using the keyboard, but when I input a move with MDI like .2" or so, the encoder readout isn't right anymore. Next i'm going to try a pull-up resistor on the two encoder signals and the 5V supply (but i need to read more on this before I do it).
The noise and slight spindle movement comes and goes....maybe it started back up because I shielded the split-out encoder wires with aluminum foil. My 2nd parallel port card came today, so I can put that in now.