controlling an add on laser to my gantry mill

Thanks for the reply Chris, yes I am looking into that way also, I have just ordered a db25 to 26pin header for the 5i25 second port P2 and I could then program a second pwm.
I'm using the 5i25 because I get better timing with it, my PC with the parallel port only is really crappy and gives me really bad latency errors no matter what I try.
BTW it's not burn-in, I'm getting small non burn gaps at the end of a move.
I'm going to try giving Z axis greater acceleration, tomorrow (it's getting late here in OZ);
Eric

Since there is no Z axis, set the velocity and acceleration as high as they can go without causing following errors.

Thanks Tom, I had a quick scan of your files and at first glance your velocity and acceleration values were what jumped out at me, will try these numbers as a start and fiddle from there.
Eric

When you divide spindle and laser with M3 and M4, you will make software switch:
For example
"spindle.M.forward" you connect to servocdrive output,
"spindle.M.reverse" you connect to some laser pwm-enable pin.

sorry aleksamc I have no idea what you mean by this, I'm not very good at this and need some hand holding.

May be you doesn't need it properties, so you don't understand.

Imagine that you need to make laser-work and than after that you want to mill and all operations you make from software program.