Thanks hanermo2. we have previously been running the machine to laser etch mostly black granite, although the machine has stood idle for a few years now. We use photograv 3 SW , Wincnc which I think is the controller. I was wondering if it was worth updating the hard wear to get it to run quicker,smoother etc, plus the HW is over twenty years old so could possibly be worn. We have struggled to get a replacement Slo syn MD808 drive motor hence the reason for possibly updating everything.Hope this makes some sense to you.