1. The sewing machine needle is blunt, causing the need […]
1. The sewing machine needle is blunt, causing the needle bar to deform.
Processing method: Change the needle, beginners should use the No. 14 sewing machine needle, its strength and toughness are more durable than the No. 9 and No. 12 sewing machine needles;
2. Presser foot, feeder teeth, shuttle tip burr.
Treatment method: Replace immediately.