04
2020
-
02
Sewing machine clothing, pay attention to uneven fabric
During the process of sewing fabric with a sewing machine, there may be irregular phenomena such as uneven fabric movement speed and short stitch duration.
During the process of sewing fabric with a sewing machine, there may be irregular phenomena such as uneven fabric movement speed and short stitch duration.
For this fault phenomenon, the author analyzed that the movement of the fabric relies entirely on the cooperation of the feeding teeth and the presser foot to move forward. Therefore, when the fabric exhibits the irregular movement mentioned above, we can conclude that there is a malfunction in the teeth and presser foot or improper pressure adjustment. If the foot pressure is too low and the fabric cannot be pressed tightly, it will cause irregular movement. At this point, we just need to turn the pressure adjusting screw downwards to tighten the fabric.
In addition, if the presser foot is too high, the flat sewing machine's presser foot will also be unable to press the fabric, which can cause the fabric to move freely or not at all. When adjusting, we should first lift the presser foot wrench, loosen the guide frame screw, and then move the presser foot rod from top to bottom to adjust the distance between the presser foot and the needle plate to a height of 7mm-8mm. Then tighten the screw and start using the car.
It is worth noting that there is another reason: due to loose screws on the teeth of the flat sewing machine, the teeth shake left and right during operation, preventing the fabric from moving forward in a regular manner. Our suggested solution for this is to remove the needle plate of the flat sewing machine and tighten the two teeth screws. After tightening, we can install the needle plate and check whether there is any friction between the teeth and the edge of the needle plate groove. If there is friction, it will cause noise and machine weight. At this time, the only way is to remove the needle plate, loosen the tooth screws, adjust the tooth position to the middle of the needle plate slot, tighten the tooth screws, and then install the needle plate.