Function description: external control board, there are two types for this controller – brushed and brushless controller, working life of brushed motor is short. Brushless control board applies no HALL working mode.
The working process like this: motor rotates in CW way at the first half of operation time, and then rotates in CCW way and twists and ties iron wire tightly at the second half of operation time, the controller can control output current precisely to make sure the iron wire tight enough while not broken.

Protective functions: over current protection; low voltage protection; overheat protection; motor blocking protection; starting up protection etc.