41
General Mach Discussion / Wierd LPT problem
« on: January 12, 2011, 11:54:16 AM »Hi all, I've been using my Mach3 lathe for quite a few years without too many problems.
Today, I was running the same code as always and in the middle of the run both axis stopped.
I checked through from drive power to the lpt cable and discovered that the computer is not outputting any steps
on the pins. I connected an oscilloscope to the lpt1 connector and checked pins 2 and 3, The direction signal on pin3
works ok but no signal on pin2.
I then swapped the pins in Mach3 and tested again and I have direction on pin2 but no output on pin3 so the lpt port is ok.
This 1200 mhz computer only runs Mach3 on Win2000 nothing else. I have not loaded any new software or done anything but use mach3
on it. I then re-installed Mach ontop of the existing version and still have the problem.
Any ideas..
Cheers
John