hi i dont know if this helps you as im very new to this, but i did have the same problem, and i got the answer off this forum somewhere
i hads to ground my vinyl cutter, and also move it away from carpet and put onto wooden floor, i was told its all to do with static, or static build up, i now reset my cutter after nearly all cuts
this maybe no help, and i might get shot down on better members, it just my learning