Bag sewing machine in the event of feed is not smooth feed plate surface to check whether serious wear and tear, but also check whether the feed dog wear the bag sewing machine main feed dog and differential feed dog height adjustment for the exposed needle plate 1mm so, push the gear up or down tight (see the time right gear is left or right).

When using single or double bag sewing bag thin fabric, sometimes feeding is not smooth or wrinkled fabrics serious phenomenon.

Feed is not smooth when there should first check the pressure foot board is serious wear and tear, if the pressure of feet deep groove board should be replaced (the presser foot should be used in good quality, inferior products may exist floor uneven phenomenon); then check whether the feed dog wear, if worn with a triangular file can be sharpened feed dog, or choose pitch dense thin material with a feed dog.

The package machine main feed dog and differential feed dog height adjustment for the exposed needle plate about 1mm, presser foot pressure adjustment moderate, and then observe whether the feed dog rose to their feet fully in contact with the pressure plate when the upper dead point, Once the discharge line to reduce the amount of rotation of the rotary hook or wire ring formation occurs in poor, will cause the hook point hook live wire loop to produce 1 to 2-pin jumper. On a flat fabric sewing needle does not jump, jump stitches as long as the processing of thick material, there will be uphill, downhill jumpers, there is a thick material into a large area on the jumper. If unilateral presser foot clearance should be adjusted to the level of the presser foot adjustment is completed should adjust the position of the presser foot limit board, this is because the main focus of the presser foot feed dogs and differential feed dog in the middle. In order to strengthen the capacity of the main feed dog when the presser foot is in the horizontal position, the limit will be adjusted in contact with the pressure plate to the soles of the feet can be.

If the package when the fabric sewing machine sewing serious fold phenomenon, in addition to wrapping the suture tension and adjust the width, but also pay attention to adjust the height of the auxiliary feed dog, inspection, the hook is firmly fixed on the lower shaft, only two gears with teeth gap between the teeth large, need to unscrew the screw gear to gear up or push down tight (see time on the gear is left or right). Because there is a Morse taper, you can just squeeze tight on the gear, but not too tightly packed, when the main feed dog height when 1mm, auxiliary feed dog should be 0.8mm; then observed in the main feed dog returns whether the cloth while stocks below the needle plate surface, which is very important, it is one of the causes of fabric folds.