Brother International PR1055X Operation Manual - Page 120

Adjusting the tension of the upper thread When embroidering, the thread tension should be set so that the upper thread can be seen slightly on the wrong side of the fabric. Turn the thread tension knobs. a ■ 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. 1 Right side 2 Wrong side Turn the knob in the direction of the arrow to decrease the tension of the upper thread. 1 Thread tension knobs 2 Tighter 3 Looser 4 Mark  If the thread tension is not still correctly adjusted, turn the upper thread guide pretension knob. 1 Upper thread guide pretension knob 2 Tighter 3 Looser ■ Correct Thread Tension The pattern can be seen from the wrong side of the fabric. If the thread tension is not set correctly, the pattern will not finish well. The fabric may pucker or the thread may break. 1 Right side 2 Wrong side 1 Red line If the red line is visible, the thread tension cannot be decreased any further. Increase the tension of the bobbin thread. (page 116) Note • If you decrease the thread tension further than the red line, the tension knob may be disassembled. • If necessary, refer to page 176 for reassembling the tension unit. ■ 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. 1 Right side 2 Wrong side Turn the knob in the direction of the arrow to increase the tension of the upper thread. Follow the operations described below to adjust thread tension according to the situation. Note • If you decrease the thread tension further than the red line, the tension knob may be disassembled. This is not a sign of a malfunction. Increase the thread tension slightly, and begin embroidering again. • If necessary, refer to page 176 for reassembling the tension unit. 118