Fault Handling Method For Sewing Machine

Chain wire Crochet wire tight

1.

The chain adjustment board is too close, so that the chain line Crochet outlet quantity is not enough, causing the machine needle thread to be pulled down: increase the chain line Crochet outlet quantity.

2. The upper and lower positions of the chain line stringing board are not adjusted, causing the chain line Crochet to be outbound or delayed: adjust the outlet time according to the standard.

Sewing elastic material to produce expansion

1, the surplus ratio of feeding teeth is too small, resulting in elongation: move the differential plate holder to the "0" position until the seam is smoothed.

2, the surplus ratio of feeding teeth is too large, resulting in shortening: shifting the differential plate to the "0" position.

The upper and lower seam is uneven and the bottom layer is short.

1. Press foot pressure is too loose: increase the pressure of the screw.

2. Pressure resistance is too big or uneven: polish the front foot or install the presser foot.

3, the differential tooth and the feeding tooth surface are not on the same plane: adjust the height of the feeding tooth as required, so that the two tooth surface should be neat.

Irregular trimming

1, the upper and lower blades are blunt: use the emery wheel or black silicon carbide wheel to grind the upper and lower blade edges, then use the grinding paste to sharpen the edge of the blade until sharp.

2, cutter contact is not good, improper position: according to the requirements for adjustment.

Suture loosening

1.

Error: reinstall the line correctly.

2, the line is too thick: replace the appropriate suture.

3. The control coil is not pressed to the line: adjust the control coil and press the line properly.

4, needle and crochet wrong: re installed correctly.

Unevenly stitched

1, threading error: re install correctly.

2, the installation of the rack is wrong: reinstall the rack so that the line can pass freely.

3. Installation error: reinstall the knife.

4, knives and scissors cloth is not neat (1) knife misloading: (2) blunt blunt: (1) adjust the correct position of the knife: (2) sharpen or replace the new product 5, line hole scratch: re polish.

6, needle tip damage: replace new needles.

7, the height of the feeding device is not suitable: adjust the correct height.

8, the pressure is too strong or too weak: adjust the pressure intensity of the holder.

Ring seam outlet is not smooth.

1, installation error: installation is correct again.

2. The timing of crochet cam movement is not suitable: adjust the wheel position properly.

3. Installation error of ring stitch needle: re install correctly.

4, threading error: re correctly thread.

5, the intensity of control line is too large or too weak: adjust the appropriate line strength.

6, the relationship between needle and crochet is wrong: adjust the relationship between needle and crochet.

7, needle plate or tongue lifting: use abrasive cloth or oil stone to skid and polish.

8, control film has been rough: use abrasive cloth to slide and polish.

Sound

1, loose parts or collision: carefully check parts of each part, then tighten all parts screws to correct collision or loosening.

2, oil road obstruction: after dismantling the oil pan, clean the external garbage of the oil pump, so that the oil pump can get in and out of the oil.

3, the oil pan rubber pad is not leveled: check whether there is a collision between the oil pan and chassis, if necessary, lay it flat so that it does not touch.

Machine weight

1, because of the impure nature of the machine oil: clean the oil with petrol and then pour in the new oil for a few minutes to lubricate.

2, because the machine is too tight or parts are not allowed to: check and correct all parts of the screws in detail, so that the machine parts have a reasonable gap.

Oil leakage

The oil guard plate of the feeding rack is broken or the cover is not covered: replace the oil proof plate, check other parts or replace the sealing rubber, cover the flat of each part, then tighten the cover plates.

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