Brother International HE-800B Instruction Manual - English - Page 36
Upper thread tension, B] When the zigzag tension discs 1 are closed
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4. PREPARATION BEFORE SEWING 4-5-2. Upper thread tension Whip stitch (plain stitch) [A] Zigzag areas Purl stitch (seal stitch) [B] Purl areas [A] Bar tacking areas [A] Bar tacking areas 4774M 4775M Whip stitch (plain stitch) To ensure that neat seams will be sewn in the bar tacking areas and zigzag areas, adjust the upper thread tension while the zigzag tension discs are open as shown in "[A] When the zigzag tension discs (1) are open" below. Purl stitch (seal stitch) 1. First, to ensure that neat seams will be sewn in the bar tacking areas, adjust the upper thread tension while the zigzag tension discs are open as shown in "[A] When the zigzag tension discs (1) are open" below. 2. Next, to ensure that neat seams will be sewn in the purl areas, adjust the upper thread tension while the zigzag tension discs are closed as shown in "[B] When the zigzag tension discs (1) are closed" below. Adjustment method Use threading mode to adjust by the procedure given below. In addition, the procedure is safe because the sewing machine will not start up, even if the treadle is depressed. Open [A] When the zigzag tension discs (1) are open 1. Press the THREAD key. (The sewing machine will switch to threading mode. The zigzag tension discs (1) will be fully opened.) 2. Turn the tack tension control (2) to adjust the tension for the bar tacking area and the zigzag area. 3. Measure the upper thread tension as shown in the illustration. 4. Press the THREAD key to exit threading mode. [B] When the zigzag tension discs (1) are closed 1. Press the THREAD key. (The sewing machine will switch to threading mode.) 2. Press the ▼ key. (The zigzag tension discs (1) will be fully closed.) 3. Turn the zigzag tension control (3) to adjust the tension for the purl area. 4. Measure the upper thread tension as shown in the illustration. 5. Press the THREAD key to exit threading mode. Closed 4776M 27 HE-800B