Hi,
I'm hoping someone can help me here with a, what appears to be, spurious signals for the software. I've been running Mach3 mill for a few years and getting good results. However, I'm starting to have problems.
The milling machine runs fine, then out of the blue, the x-axis stepper occassionally momentarily stalls and looses approx 5mm in travel on a fast jog mid program - it is like the machine has recieved a spurious signal that has put the stepper into stall.
I have changed steppers and drivers and checked everything out on the machine and all is OK. Today, when doing a test aircut I noticed that, part the way into the programme, the spindle was suddenly running at 4400rpm yet checking the G-code line it was set at 4000rpm. I stopped the machine and reset - re ran the programme and it ran the spindle at the correct speed. However, part way through the programme the X-axis did it's momentary stall again loosing approx 5mm.
I shut everything down to and came back to machine later - doing a test aircut from the same programme as previously run and found that the spindle was screaming it's head off (the readout on the actual mill was giving 5300! - this is more than the max that the motor can handle - usually max out at 4500) - checked the DRO and forund that Mach had set the spindle at 8400! I noticed that the spindle factor(?) - appeared alongside the spindle speed - was at 2.2. The G-code line was 4000rpm. I have checked the G-code and everything is as it should be. What is happening? Is this wrong signal for the spindle also what is happening with the X-axis too? Can anyone help?