Singer 9970 Instruction Manual - Page 21

THREAD TENSION This machine adjusts the thread tension automatically when pattern is selected. However you can change the thread tension as follows. 1. Press the fuction F5 button directly under the tension mark. LCD changes to the thread tension mode. 2. To increase the upper thread tension, press the function F5 (+) button. To decrease the upper thread tension, press the function F4 (-) button. Pre-set tension number is highlighted. The mark " " is indicating the absolute thread tension. By pressing the function F3 (AUTO) or clear "C" button, thread tension will return to pre-set. By pressing the function F1 button, LCD return to the previous mode (Stitch information mode). When another stitch pattern is selected, thread tension will return to pre-set. You can start sewing at this mode and change tension while sewing. A. Preset thread tension Upper and bobbin thread will lock approximately in the middle of fabric. B. When thread tension is increased. Bobbin thread will appear on the top side of fabric. C. When thread tension is decreased. Upper thread will appear on the bottom side of fabric. D. Thread tension except for straight stitch Thread tension except for straight stitch is set to a slightly weaker tension than when sewing straight stitch. You will obtain a nicer stitch when upper thread appears on bottom side of fabric. E. Helpful Hints 1. If your sewing appears as shown on drawing, stitches on top side of fabric are good but bottom side looks very loopy, it could be that the upper thread is not threaded correctly. Refer to page 16 for correct threading. 2. If after checking the top thread and the bobbin thread is still showing on the top side, check the bobbin to see if it is set correctly. Refer to page 15 for the correct setting. F5 F1 F3 F4 F5 21