Velcro tape auto cutter does not cut the tape

1.The bearing of knife is broken in the automatic strip cutter. Check the reason, replace the bearing. 2. Wear of the middle knife. The middle knife has cutting edges on both sides, one side can be worn and the other side can be used or replaced with a new knife. 3. The tube pin of the middle knife is broken. Use a small punch to punch out the broken pin and install a new pipe pin. 4. The tightening force is adjusted [...]