Brother International LK3-B431 MKII Instruction Manual - Page 46

10 . STANDARD ADJUSTMENTS 10-12. Adjusting the needle up stop position The needle up stop position is adjusted so that the index mark 0 on the machine pulley 0 is inside the mark 0 on the belt cover 0. If adjustment is necessary, loosen the screw 0 at the "U" mark of the machine pulley 0 and adjust the position of the machine pulley 0. The machine pulley 0 stops later if it is turned clockwise, and it stops earlier if it is turned counterclockwise. NOTE: The screw 0 at the "D' mark is an adjusting screw for the needle down detection function and is adjusted to match the feed timing, so it should not be loosened. The screw 0 is a screw for detecting the machine stop position, and should not be loosened. * If the index mark 0 is not inside the mark 0 when the sewing machine is started, error code "E-50" will be displayed. Turn the machine pulley to move the index mark 0 to the correct position and then start the sewing machine. 10-13. Adjusting the thread wiper 11 0 IQ 0 0 F 2±0.5mm Approx. 20mm 1. Loosen the set screw 0 and move the wiper arm support 0 up or down to adjust so that the clearance between the top of the thread wiper and the needle point 0 is 2 ± 0.5 mm when the thread wiper is aligned with the center of the needle. * Before carrying out this adjustment, check that the needle bar is lowered 5 to 5.5 mm from the needle up stop position when the sewing machine stops. 2. Loosen the screw 0 and move the thread guide connecting plate 0 up or down so that the thread wiper is approximately 20 mm from the needle when it is at the standby position. 39 LK3-6430E-, B431E-, B432E-, B433E- Mark II