Got my MH 721 on eBay and it was delivered Jan 11, 2007. My problem is: I change my speed settings to 8 inches and force settings to 30g for optimum premium vinyl plots but, in the course of the cut (especially longer ones of 4 feet or more), the settings will invariably move up in speed and downforce. The result is that many times the plotter cuts through the paper backing in the middle of the plot. I also think it strange that I have to ratchet the speed and force down to such low settings to make a successful plot (at least, at the start).
Please help, as I have ruined lots of premium vinyl!
I have grounded the stand to the plotter, I'm using a serial connection on Comm1, and I'm running Signcut X2 PE on XP.