Brother 431B Sewing Machine User Manual


 
1. SPECIFICATIONS
--. Measuring tension
Upper thread tension Lower thread tension
3564Q 3565Q
Thread take-up spring height Thread take-up spring tension
Measure the value when the thread take-up
spring starts to extend.
1–2 mm
3566Q
3567Q
* When the spring height (stroke) is great or the spring tension is insufficient, it may cause the thread end length to vary after
thread trimming.
KE-430B, 430C series
6