Heya,

So, first thing is first, we need to make sure your parallel port driver is working, and that Mach3 is talking to it.

I've never used Mach3 myself, but to me that means assigning a port and a pin to one of the axis directions, let's say X Dir, assign to Pin 1 of whatever port you're using, maybe port 1?

Now, jog that axis in Mach 3 one way then the other whilst having a multimeter in DC voltage <20V mode on the parallel port to try and see it change. If you can see the pin change when you change the jog direction, we're in business, otherwise there's a problem to fix.

Incidentally, I'm over in Fareham, so although I'm not experienced with either that mill or the software, I'm quite good with this stuff in general so would be willing to pop over for some poking around and moral support.

Good Luck!
Andy