How to scientifically debug three needle five line stretch sewing machine
The curved needle must move left to the farthest limit position, which must be repeated to confirm.
At this point we have to pay attention to the front and rear movement of the needle when the needle on the left and right to move the limit position, to move the needle forward and backward movement in the curved needle to the left to reach the needle position to achieve the minimum.
In addition to the left and right movements, the looper has the front (toward the operator) (away from the operator).
The adjustment of the timing of the needle and the looper is most important and most noticeable. When the needle is lowered to the lowest point, the looper must move to the nearest extreme position, and the needle is raised to the highest
Adjustment of the timing of the needle and the looper
