Dongguan Wan Jiang Ling-car dealers. Computer pattern sewing machine does not cut the wire transfer method computer tricks machine the problem may be in the on-line sub-line is not divided, resulting in the aspects of the knife did not hook to on-line, on-line poor line, cut line at the wrong time. Can be summarized as follows: a cut line at the wrong time. With earlier, the suture will emerge from the needle may produce poor on-line cut line; late with needle and thread wiper collision, resulting in poor cut line. Knife-point line is not divided. Knife blade wear. On-line poor line. Computer pattern sewing machine needle and hook with the wrong time. The gap may be the bobbin case positioning pieces wrong, wrong needle and hook point gap, the gap of the hook of the needle plate is wrong, the needle bar lift amount and height wrong. Fixed knife, pressure-ray position is wrong. The initial position of the pressure-ray wrong, will result in the closing line of the bottom line is bad; initial fixed knife the wrong place, it will cause poor cut line. Seven off-line spring range of motion is too small. Eight knife position is not accurate, knife incision with fixed blade knife-edge distance is too large, it occurs that the cut line. Solution: adjust the cut line. Adjust the cut line solenoid location, combined with the thread trimming cam to be adjusted. Pushed fault side of the bobbin case cover, hand Turn the machine pulley observed on-line over the surface of the cover from the shuttle to be taken up is smooth (key observation retractor action is to ensure that on-line surface of the cover from the shuttle and shuttle file passed the needle plate gap), otherwise adjust the the retractor position, on-line from the shuttle passed the cover surface retractors and shuttle files between the needle plate. Check the rotary hook surface scratches, rust and other defects. The rotary hook positioning pieces gap of 0.2 mm, needle and hook point gap of 0.05 mm, the gap of the hook of the needle plate is 0.9 mm, the rise in volume and height of the needle bar should be appropriate. V. replace the knife. Note: double needle needle guard in the conditions of work, the needle and the hook point with the gap, if appropriate, exist needle in flexion with the possibilities. Knife position will deteriorate, prolapse of the on-line cut line error occurs. A properly check and adjust the fixed knife, the location of the pressure-ray film. Properly check and adjust the position of the knife before and after. Properly checked and adjusted off-line spring stopper plate.