How To Deal With Common Faults Of Overlock Sewing Machine

Needle bending

1.

The positioning of the needle and the upper bending needle is not allowed: the position of the needle and the bending needle is readjusted.

2, the gap between the needle and the upper bending needle is too large: re adjust the position of the bending needle.

3, the relationship between needle and crochet is wrong: the relationship between high speed needles and crochet pins.

4, threading error: re correctly thread.

5, needle installation error: re install the needle correctly.

6, control line pressure is too strong or too weak: high speed control line strength.

7. The tip of the crochet is damaged: remove the hair or replace the new product.

8, needle bending: new products.

9, the thimble piece installation error: re install the thimble piece correctly.

Downward bending needle thread jumping needle

1, machine needle bending or needle tip hair: replace machine needle.

2, the direction of the needle is not correct: adjust the direction of the needle eye, so that the needle slot can be directed to the operator.

3. The lower curved needle needles are not sharp: grinding or bending the needle needles or replacing them.

4, the guard line plate is not fixed: adjust the position of the guard wire plate, so that the guard line board draws closer to the machine needle.

5, the height of the needle is not allowed to be positioned according to the standard.

6. The clearance between the lower bending needle and the machine needle is too large: re adjust the gap according to the standard.

7, needles and sutures are not properly selected. The needle is too thick and the thread is too thin: the needle and thread should be selected correctly.

8. The return quantity and the height of the lower bending needle are not correct: adjusting the left and the right size of the needle and the lower bending needle meet the standard.

Interlacing jump needle

1. Upper and lower bending needles.

The gap between the intersection points is too large: enlarge the deflection angle of the upper bending needle or the lower bending needle installation position.

2. The needle of the upper bending needle has been blunted: replace the upper bending needle.

3. There is serious wear on the convex part of the lower bending needle: replace the lower bending needle.

Chain line skipping

1, chain line Crochet positioning is not allowed: adjust the chain line Crochet position.

2, the position of the chain line picking rod is not adjusted, so that the thread of the chain Crochet can not be collected, and the line identification can not be produced: adjusting the position of the thread picking rod, and achieving the braided line trace when the material is interrupted.

3, chain line bending needle clamp plate pressure too loose: Micro tighten chain line bending needle thread clamp nut.

4. The return quantity or height of chain thread Crochet is incorrect: re adjust according to the standard.

Broken needle

1. The position of the lower bending needle is not allowed to be broken. The needle is broken. The position of the lower bending needle is re adjusted.

2. The needle tip is not parallel to the center of the needle bar: correct the needle bar head or replace the needle clamp to make the center of the needle bar parallel to the center of the needle bar.

3, the position of the guard pin is not correct: adjust the position of the guard rack.

4, the pressure foot slot is not aligned with the machine needle: adjust the position of the presser foot slot and point the machine needle.

5, needle installation error: re install the needle, long hook for the operator.

6, needle size is not suitable: choose suitable thread and needle for cloth.

7, the needle has been bent: re needle replacement.

8, the relationship between needle and thimble is wrong: adjust the relationship between thimble and needle.

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

10. The needle is not in the center of the needle slot or the presser foot slot: reinstall the needle or needle plate, or press the foot at high speed.

Breaking machine needle and thread

1.

Clamp wire plate pressure too tight: loosening machine needle thread clamp nut.

2, needle tip hair: replace machine needles.

3. Lower curved needle tip hair: trim down the needle tip or replace the lower bending needle.

4, feeding teeth have front mouth: grinding or polishing cloth surface.

5. There is a burr on the edge of the small needle plate: the edges of the small needle plate are repaired or polished.

6, poor quality of the line: switch to a good quality line.

7, the thickness of the line is uneven or thicker than that of the needle: the appropriate needle and thread should be changed.

8, threading error: re correctly thread.

9, control line pressure is too strong: adjust the intensity of the control line.

10, needle installation error: reinstall the needle correctly.

11, the line rack wrong line: reinstall the rack so that the line can be freely passed.

12, the needle temperature is too high: (1) needle cooling has no cooling oil; (2) the guiding needle plate is wrongly installed; (1) oil cooling; (2) adjust the guide pin plate.

13, the control wire has been rough: use abrasive cloth to slide and polish.

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