The threading method of the overlock sewing machine is to thread the looper thread first and then the machine needle thread.
The threading method is as follows:
Before threading, please note:
1) Adjust the relationship between the thread stand and the thread ball placement. This is the same as the flat car. The same; in addition, the order of the needle thread and the upper and lower looper threads must be determined to prevent the sutures from kinking together. According to the wire rack, the wire rack of the overlocking machine has a three-wire wire reel rack installed in parallel with the third-wire wire crossing board, and a second-wire wire reel rack corresponding to the second wire wire crossing board. The second-thread thread reel frame and the second-thread thread guide plate are generally installed on the right side of the machine table for placing the upper and lower looper threads; the third-thread thread guide frame is perpendicular to them and is used for placing the left and right machine needle threads and chain loopers. When passing through the thread rack, the line pay-off position is required to be appropriate and stable, and each thread hook of the thread rack must be aligned with the thread post on the respective reel. Because the pressure of the thread pressure spring of the thread clamp of the overlock sewing machine is generally small, if the resistance of the thread passing through is slightly greater, it will affect the normal combination of the stitches.
2) It is best to adjust the suture angle through each thread clamp to a range of less than 90°. Because the included angle is too large, the stitches often run out of the clamping plate during sewing, causing the stitches to be poorly combined. The angle of the upper thread can be adjusted by loosening the thread clamping screw and turning the peach-shaped thread guide plate.
3) The upper looper thread hook must be hung with thread. If it is missed, it will also affect the stitching.
The method of threading the upper looper thread is to pull the suture from the second thread hole of the second thread thread frame, and pass it through the second horizontal hole on the right side of the wire rod on the upper cover of the casing (from the rear). Pass it forward), then thread the suture from top to bottom into the second longitudinal hole, wrap it around like this, and then pull it out; thread it into the upper second hole of the four-eye thread passing plate, and then go around the thread clamp. The clamping plate (the angle of the suture passing through the clamping plate should be less than 90°), pull it out from the second hole under the four-eye thread-passing plate, pass it through the corresponding wire hole in the casing, and then pass it through the left side of the thread volume adjustment plate. In the small plate, pass the thread through the second hole of the upper looper shaft, pass through the thread passing frame fixed on the casing, then thread the upper looper from front to back, and pull out 50mm of thread.
The way to thread the lower looper thread is to pull the suture out from the first thread hole of the second thread thread frame, and pass it through the first horizontal hole on the right side of the wire rod on the upper cover of the casing (made by Pass it through from back to front), then pass the suture from top to bottom into the first longitudinal hole, wrap it around like this, and then pull it out; pass it through the first hole in the top of the four-eye thread-passing board, and then go around the clamping thread. The clamping plate of the device (note that the angle of the suture passing through the clamping plate should be less than 90°), pull it out from the first hole under the four-eye thread passing plate, pass it through the corresponding wire hole in the casing, and then insert it into the thread amount adjustment plate In the right small plate, pass through the first thread holding hole of the upper looper shaft, then pass the thread holding part of the upper looper swing lever, pass through the two holes of the thread holding part of the lower looper shaft, and then pass the lower looper thread; The curved needle has three holes from bottom to top. Pass the suture through the first hole from front to back, then through the second hole from back to front, and finally pass the suture through the third hole from front to back along the thread groove, and then pull Take out a 50mm long thread.