S
sarareillyAug 17, 2025
Why does the upper thread keep breaking on my Brother BAS-311F-0 Sewing Machine?
- JJessica ArroyoAug 17, 2025
The upper thread may break due to several reasons: * Incorrect upper thread tension: Adjust the upper thread tension. * Incorrect needle installation: Install the needle so that the groove is facing forward. * Incorrect thread for the needle: Use the correct thread for the needle. * Thread take-up spring issues: Adjust the tension and height of the thread take-up spring. * Damage or burring on parts: File smooth or replace the affected part. * Overheating: Use a thread cooling device. * Incorrect thread path: Pass the thread correctly along the thread path.