I have a pcut ctn630 that is not cutting accurately. When I try to cut a circle, it ends up with flat spots in random locations, it doesn't track properly. The cuts don't line up anywhere close to where they are supposed to be. I'm using a brand new 45 degree blade. I am using signblazer elements and have never had a problem like this before. I have two of the same cutters and the other one works fine. Whenever I try to change the cutter settings, signblazer comes up with the "unrecoverable error" and crashes. I have calibrated this machine according to US cutters forum (with the nickel) and it hasn't helped any. Is there any other way to adjust settings or calibrate the machine to cut properly? Is there a way to prevent the program from crashing every time I try to open the cutter settings?