Brother International VX3250F Operation Manual - Page 28
Thread tension
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SEWING BASICS Select a stitch. 7 CAUTION ● After selecting a stitch, slowly turn the handwheel toward you (counterclockwise) and check that the needle does not touch the presser foot. If the needle hits the presser foot, the needle may bend or break. ● The twin needle should only be used with the Straight Stitch (Center Needle Position) and the Zigzag Stitch (1.5 mm (1/16 inch) width). Do not use the twin needle with any other stitches. Start sewing. 8 For details on starting to sew, refer to "Starting sewing" on page 23. Two lines of stitching are sewn parallel to each other. CAUTION ● When changing the sewing direction, be sure to raise the needle from the fabric, and then raise the presser foot lever and turn the fabric. Otherwise the needle may break or the machine may be damaged. Thread tension The tension of the thread 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. 2 1 3 4 1 Surface of fabric 2 Back of fabric 3 Upper thread 4 Lower thread ■ Upper tension is too tight Loops will appear on the surface 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" on page 15 and rethread the bobbin thread. 2 1 3 5 4 1 Surface of fabric 2 Back of fabric 3 Upper thread 4 Lower thread 5 Loops appear on surface of fabric Solution Reduce the tension by turning the upper tension control dial to a lower number. 27