... miss 3 techniques at the same timeStitch system: step needle motor controls, is equipped with 32 sections stitches,which can ... is controlled by servo motorFabric-rolling system: PC control, torque electric motor control, 24 kinds of pull are available to be ... , broken needle, striker, back roll cloth, piece count, overload motor, heterotopia shaking table and hand piece.Driving-head system: servo ...