i am cutting out some lettering using scal3 pro and i looked at the design in cut preview and everything is fine but when i goi the cut it, it works fine for about 90% of the design and then starts to scribble the letters. i put it into pen mode and drew it on a piece of paper and it worked fine. went back to cut mode and its cut the same as before. so i put it into pen mode and it cut the vinyl fine. please help