CM3 won't work with the latest Illustrator upgrade. CM4 keeps randomly changing the condition settings on the plotter. Set the plotter on Condition 1 manually, sometimes it will stay on 1, sometimes it randomly changes it to 3. Try "enabling driver options" in cutting master, sometimes it will use those settings, sometimes it just randomly does it's own thing. Turn that option off, get the same random crap
Graphtec tech support used to be outstanding, the techs actually sounded like they knew the plotters and the software inside and out and they could talk you through anything. Now, when you finally get someone on the phone, the conversation is more about getting you off the phone than getting you answers.