also, i just had the same problem today!! my cutter kept going back and forth on the same line till it cut clear through the vinyll, if you have a tray that allows the vinyll to roll and its being cut make sure the vinyll roll, stays on the tray, if you dont have a tray make sure theres enough slack so it can continue to cut your design, i didnt have enough slack of vinyll for it to flow easily so because of the pressure of the roll, it didnt roll out, and my needle couldnt continue because the wheels werent feeding my material out....hope some of this made sense to you lol its kinda hard to explain, anyways good luck and hope your problem gets solved.