Help please,
Having installed a timing disc on my C1 style lathe, in accordance with the instructions in the Mach3 manual, I have a problem. I calculated the slot width according to the manual(3mm on a 99mm disc), I know it's right, the wife checked it. The software returns an accurate RPM for the spindle (exactly the same as my optical tachometer) up to about 200RPM. Beyond that, no increase in the registered speed. Any one any ideas as to what I should do?
Ian Hart