new lenovo pc hangs after 30 minutes driving a cnc machine

[nwk]

I have a new Lenovo A58 pc with windows 7 32 bit pro.  I am running Mach3 to drive a cnc machine via a parallel port.  (The Mach3 software is an exact copy from a previous very old win2k machine that failed)

The cnc machine ( a router driven by stepper motors) needs pulses from the pc parallel port to work.

My problem is after about 30 minutes the cnc machine stops, and the screen appears to 'hang'. 

I suspect that there is a power saving feature that stops the Lenovo machine from working.

I have set the 'power management' settings (disk/display/cpu) to 'never' stop.

Not sure if there are any other settings that I could change?

Another alternative would be to install a program that 'moved' the mouse in the background,
so that the pc would re-set the 30 minute timer?

[rthompson80819]

If you know enough to turn off the power settings to never, I'm sure you have also set the screen saver to none.  You didn't mention it so I had to ask.

On some cnc machines the software was written for older OS's, and doesn't always work for newer versions of OS's.  That would be the next thing I would look at.  Although if that's the case the fact it works for 30 minutes is puzzling.