Common faults and solutions for sewing machines
2021-11
A. Skipped stitches: The hook at the bottom of the machine fails to hook the thread or slips after hooking the thread and the sewing machine does not form a continuous thread step.
1. Incorrect threading method, please follow the "threading diagram" and rethread the thread.
2. The straight needle is incorrectly installed. Check the needle height and orientation so that the needle moves slightly downwards in front of the needle plate hole.
3. The needle tip is straight or bent, replace it with a new one.
4. If the tip of the curved needle is blunt, polish it with an oil stone or fine sandpaper, or replace it with a new curved needle.
5. If the stitch tension is too high or too low, adjust the stitch tension appropriately.
6. The curved needle does not fit the loop of the right straight needle and the right needle of the lower trim line skips stitches. The loop of the straight needle is too small, increase the amount of skipped stitches appropriately.
7. The loop on the left straight needle cannot be hooked by the curved needle. The loop formed by the left stitch of the lower trim thread and the loop formed by the straight needle are too large, the amount of jumper should be reduced appropriately.
8. The bent needle cannot catch both the middle and left straight stitch loops, the middle and left stitches of the lower decorative thread both jump, reduce the amount of jump stitches appropriately.
9. The middle left needle on the back of the curved needle cannot be threaded into the triangle of knitting needles and curved needle stitches, the middle left needle back jumps. Check that the stitches pass through the thread clamp, check the synchronised work of the bottom thread cam and readjust as standard if there are any problems.
10. Improper cooperation of needle and bending needle with the YOYO resource network. Check the height of the needle bar and the synchronisation of the needle and bending needle. If there are any problems, readjust according to the standard.
11. Mismatch between needle and needle guard. Check the position of the needle and needle guard.
12. The needle on the decorative thread skips stitches because the needle does not fit the tension needle properly or the tension needle is in the wrong position. Check the mating dimensions of the needle and tension needle and check the thread yield of the tension needle.
*** Translated with www.DeepL.com/Translator (free version) ***
Contact
Service Hotline ：
Add: Shatou Industrial Park, Jiujiang Town, Nanhai District, Foshan City, Guangdong Province
No.1, Zhenye East Second Road, Foshan hualianda intelligent technology co.，ltd
Wechat Official Account
Sweep to Add
Enterprise WeChat
Sweep to Add
