How To Solve The Problem Of Poor Movement Of Sewing Materials

Back and forth

At that time, there is always the phenomenon that clothing is moving back and forth, that is, walking forward and backward.

This is caused by too high a cloth tooth. The surface of the needle is exposed too high, and the teeth always appear outside the needle plate to move back and forth, causing the material to move back and forth.

When the adjustment is made, the screws of the lifting crank screws are loosened, and the teeth are pressed down with a screwdriver, so that the delivery teeth are reduced to the standard height, that is, the teeth are exposed to the size of the needle plate 0.8-1 mm, and then the crank screws are screwed.

The material does not go forward.

The movement of clothing depends entirely on the pfer of teeth.

When the material does not move around, it is only found on the teeth.

If the tooth position is too low, the material can not move forward.

When adjusting, the machine head is pulled up first, the lifting teeth crank screws are loosened, and the rack rack is gently lifted with a screwdriver to send the teeth to the direction.

Expose the needle plate 0.8-1 mm above.

It's the standard size of the teeth. As long as the position is adjusted, the material can move normally.

Finally, tighten the screws.

When you screw the screws, you should also pull up the machine head.

Irregular material movement

in use

In the process of sewing materials, irregular movements of clothing and uneven stitches are sometimes observed.

The movement of the cloth depends entirely on the mating of the feeding tooth and the presser foot. Therefore, when the fabric is in the irregular motion, it can be concluded that the teeth and presser foot are malfunctioning or the pressure is not properly adjusted.

For example, presser foot pressure is too small.

If the cloth is not pressed, it will cause irregular movement.

At this point, just turn the pressure screw down to compress the material.

The presser foot is too high to press the material, which will cause the material to move or move at any level. When adjusting, the foot wrench is lifted up, the guide screw is loosened, and the presser bar is moved up and down, so that the distance between the presser foot and the needle plate is adjusted to 7-8 millimeters, then the screw is screwed up and then driven.

Another reason is that because of the loosening of the teeth and the movement of the teeth, the left and right sides of the teeth are shaken so that the material can not move forward regularly.

The treatment is to unload the needle plate.

Tighten the two teeth screws.

After tightening, install the needle plate, check whether the teeth on the two sides are rubbed with the edges of the needle slot. If there is friction, it will cause noise and machine weight. At this time, the needle plate must be unloaded again, the teeth screws should be loosened, the position of the teeth should be adjusted to the middle of the needle slot, and then the needle plate should be tightened after tightening the tooth screws.

Material back to back.

Sometimes a sewing towel sometimes appears.

Instead of moving forward, it moves toward the operator, that is, the fabric is retreating.

This failure is due to the misalignment of the upper axle crank and the cam eccentric screw.

The tooth can move forward rhythmically. It is entirely driven by a cloth cam.

Because the cam itself is eccentricity.

So the front and back of the fork move, and the fork drives the feeding axis and rack to promote the reciprocating movement of the teeth.

It can be seen that the eccentric position of the cam is very important.

The standard angle of the upper axle crank and the cam screw.

As long as the angle between the cam screw and the upper crankshaft is adjusted to 260-300, the material will not return.

When adjusting, the rear cover of the head is pulled down, and the cloth feeding cam can be seen, and the screwdriver is inserted into the inner part of the casing, and the cam of the delivery cam is loosened, then the screw is screwed to the upper shaft and bent to 260-300, and then the cam screw is tightened.