Explanation Of Automatic Thread Cutting And Sewing Needle Positioning Device For Sewing Machine

The automatic shearing device is driven by a solenoid valve to drive a driven rod. The driven rod contacts the control cam to start the shearing mechanism, and the shearing type cutting wire knife cuts off the suture on the edge.

When you want to cut the line, pedal the pedal.

The machine began to work; the sewing machine automatically lifted the needle bar from the lower needle to the upper part of the needle, and when it arrived at the predetermined point, the wire drawing device installed under the needle plate began to work. The wire drawing device simultaneously grabbed the needle line and the shuttle core line, and pulled the two lines into the fixed cutter, cutting the thread like a scissors.

The distance between the edge of the scissors and the center of the needle is 4 mm, the cutting edge is 0.6 mm, and the distance between the dynamic scissors and the needle center is between 2 and 2.5 millimeters.

When

The distance between the edge of the knife and the tip of the knife is 4 millimeters. It is in the standard position, but it can be shifted to the right slightly more than 4 millimeters. At this time, the time of the bottom line cutting is delayed, but the line is increased because the base line stays longer. When the distance between the dynamic scissors and the center of the needle is greater than 2.5 mm or less than 2.5 mm, there will be the result of cutting the bottom line.

First, the two selector switches are adjusted to ON bits, so that the seam can be automatically returned at the beginning and end of sewing.

If the starting return pin switch is pferred to the OFF position, the switch back to the ON switch is terminated. The synchronous machine is going well, and the return pin must be good.

If there is something wrong with the return pin of the synchronous vehicle, then it is certain that there is something wrong with it. For this reason, we can check whether the side pressure foot has been raised, whether the crank angle is correct, whether the clamping mechanism is not screwed, the angle of the crank handle and the rocker chuck is not correct, and so on.

Feeding mechanism crank and rocker chuck screws loose and so on.

It can be automatic when sewing is terminated.

On the other hand, automatically return the stitching head at the beginning; if the two start is fully adjusted to the OFF position, it will not be able to automatically return the needle, but the button switch can be used to return the stitching head as required. If only the needles are stitched evenly, no need to return the sewing head, so that the two switches can be fully adjusted to OFF bits.