Brother International SQ9050 Users Manual - English - Page 33

Adjusting thread tension The thread tension will affect the quality of your stitches. You may need to adjust it when you change fabric or thread. Memo ● We recommend that you do a test sample on scrap of a fabric before you start to sew. ■ Correct tension Correct tension is important as too much or too little tension will weaken your seams or cause puckers on your fabric. 1 Memo ● When you finish sewing, remove the bobbin cover and then make sure that the thread is shown as below. If the thread is not shown as below, the thread is not inserted through the tension-adjusting spring of the bobbin case correctly. Reinsert the thread correctly. For details, refer to page 15, 16. 2 a Wrong side 2 b Surface c Upper thread d Lower thread 3 4 ■ Upper tension is too tight Loops will appear on the surface of the fabric. ■ Upper tension is too loose Loops appear on the wrong side of the fabric. Note ● If the bobbin thread was incorrectly threaded, the upper thread may be too tight. In this case, refer to "Lower threading" (page 15) and rethread the bobbin thread. 1 2 3 a Wrong side b Surface c Upper thread d Lower thread e Loops appear on 5 surface of fabric 4 Solution Reduce the tension by turning the upper tension-control dial to a lower number. 54 3 Note ● If the upper thread was incorrectly threaded, the upper thread may be too loose. In this case, refer to "Upper threading" (page 17) and rethread the upper thread. 1 5 2 3 4 a Wrong side b Surface c Upper thread d Lower thread e Loops appear on wrong side of fabric Solution Increase the tension by turning the upper tension-control dial to a higher number. 54 3 31