Fiber is broken before the cutter in the PTFE guiding tube

This may happen if the cutter is positioned incorrectly, so the fiber could not pass through it and was broken in the PTFE guiding tube (see INCORRECT POSITION OF CUTTER, p. 11.9).

1. Pull out the tube from the printing head, pressing the latch on both sides.
   
2. Remove the excessed fibers from the tube.
   
3. Connect the tube to the printing head.