Friend of mine's computer died & I had one that I had been using before making some upgrades, machine is running windows 7 32bit via the parallel port & has been optimised to run mach3. This computer had been running my CNC for a couple of years without any problems. I removed myself as a user & deleted all my files, removed my licence file for mach3 & installed my friends licence code & the profile that he had been using with his old computer. Those were the only changes to the computer.
Now it is hooked up to his cnc machine the Y & Z axis seem to be working as normal but there seems to be a random problem with the X axis. If you press the left arrow key the machine moves to the left as it should or if you press the right arrow key it moves to the right as it should. The problem is that on occasions if you move to either the right or left (doesn't seem to matter) then move in the opposite direction the machine carries on moving the way it had previously been moving rather than changing direction
I thought this may be a keyboard problem but I have now tried 3 different keyboards & same thing happens with them all, every now & again the axis doesn't change direction when it should. Haven't tried cutting anything to see if it does the same thing when cutting just in case there was a problem