I am using Mach3 with a CandCNC MP3000 torch height control on a plasma cutting machine. The machine has been running fine for several months, then it started display an intermittent erratic problem where it will be cutting fine with the same program over and over again, then have the problem out of the blue. What it seems to be doing is following the G-code properly then, spontaneously will move to the next position as a rapid (G00) when it should have been a G2 or G3. When you run the same program again it will perform normally. On the display screen when scrolling through the code it displays all movements properly, but when the problem happens it displays it as a rapid on the screen? I am stumped to why this is happening, and am losing a lot of time and material every time it happens… some one help, please!
I have attached several pictures of the problem, G-code and the Mach configuration.