Brother International PR-620 Users Manual - English - Page 103

OTHER BASIC PROCEDURES After making the adjustments, try 4 embroidering with all needle bars to check the thread tension. Memo ● In the built-in embroidery patterns, one pattern is used for checking the thread tension. By sewing this pattern, the thread tension can easily be checked. For details, refer to page 160. ■ Upper thread is too tight The tension of the upper thread is too tight, resulting in the bobbin thread being visible from the right side of the fabric. (Right side) (Wrong side) Turn the knob in the direction of the arrow to decrease the tension of the upper thread. Adjusting the tension of the upper thread Turn the thread tension knobs. 1 3 1 2 4 1 Thread tension knobs 2 Tighter 3 Looser 4 Mark 1 If the red line is visible, the thread tension cannot be decreased any further. Increase the tension of the bobbin thread. For details, refer to page 85. Note ● If you decrease the thread tension further than the red line, the tension knob may be dis-assembled. ■ Upper thread is too loose The tension of the upper thread is too loose, resulting in a loose upper thread, loose thread locks or loops appearing on the right side of the fabric. (Right side) (Wrong side) Turn the knob in the direction of the arrow to increase the tension of the bobbin thread. 86