oooh yeah.. this happens whens the media get caught up, or it pulls vinyl to tight when feeding forward or bucnhes up or it some times just does it for no reason LOL. try doing this.
1. find out how big your desgin is (say 83") then foward the vinyl a lil bit past that measurement say like 90" then hit "V" to feed it back then try cutting.
2. check your rollers in the back and make sure they are lined up in the grooves
3. roll out some vinyl in the back so it not pulling
4. try a slower speed
5.and make sure your rollers in the back are set up for how much vinyl you have on there like if its a full 150 yards roll i put the bar all the way to the last groove, and on the second groove in for a 10 yard roll
and a
and if it's still giving you a problem call the summa tech support
hope that wasn't to confusing and hope it help a lil