Brother International XL-2121 Users Manual - English - Page 29
Tension of the Thread
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KNOWING YOUR SEWING MACHINE Tension of the Thread The tension of the thread will affect the quality of your stitches. You may need to adjust it when you change fabric or thread. Correct tension Correct tension is important as too much or too little tension will weaken your seams or cause puckers on your fabric. 2 Memo ● We recommend that you do a test sample on scrap of a fabric before you start to sew. ■ Possible Problems If the Tension is Wrong Upper tension is too tight. Loops will appear on the surface of the fabric. 2 1 3 5 4 1 3 4 1 Surface of fabric 2 Back of fabric 3 Upper thread 4 Lower thread 5 Loops appear on surface of fabric 6 Loops appear on back of fabric. 54 3 Solution Reduce the tension by turning the Upper Tension Control Dial to a lower number. Upper tension is too loose. Loops appear on the back of the fabric. 2 6 1 3 4 54 3 Solution Increase the tension by turning the Upper Tension Control Dial to a higher number. 28