Brother International SL-1110 Instruction Manual - English - Page 20

8. THREAD TENSION 8. THREAD TENSION 8-1. Adjusting the thread tension CAUTION Turn off the power switch before removing or inserting the bobbin case. The motor will keep turning even after the power is switched off as a result of the motor's inertia. Wait until the motor stops fully before starting work. The machine may operate if the treadle is depressed by mistake, which could result in injury. Good even stitches 0572M Upper thread Lower thread 0573M Upper thread tension too weak or lower thread tension too strong Increase the upper thread tension. Decrease the lower thread tension. 0574M Upper thread tension too strong or lower thread tension too weak Decrease the upper thread tension. Increase the lower thread tension. Adjust by turning the adjustment screw (1) until the bobbin case drops gently by its own weight while the thread end coming out of the bobbin case is held. Becomes weaker Becomes stronger 2177M After the lower thread tension has been adjusted, adjust the upper thread tension so that a good, even stitch is obtained. 1. Lower the presser foot. 2. Adjust by turning the tension nut (2). Becomes weaker Becomes stronger 3853M 13 SL-1110