Brother International HE-800B Instruction Manual - English - Page 92

11. TROUBLESHOOTING 11-10. Uneven seams (8) ...... Thread sticking out at end backtack Items with a "*" in the "Page" column should only be handled by a qualified technician. Cause Check Remedy Backtack shape Checking the number of Adjust the setting values for parameter numbers 51 end backtack stitches and 52. Checking the end backtack width Uneven feeding material Work clamp pressure Increase work clamp pressure. * The standard height of the adjustment screw is approximately 30 mm, so tighten it further than this. Work clamp When using knit material, replace with the -3 work clamp and needle plate. Upper thread trimmer Adjust to an appropriate opening timing. opening timing Upper thread trimmer Apply grease to the inclined face of the opening cam. operation Lower thread clamp Adjust so that the lower thread clamp plate opens opening timing when the feed mechanism moves 6 - 7 mm. Page 39 66 * 69* 69* 70* 11-11. Uneven seams (9) ...... Sticking in needle plate Front and rear tack sections of material gets stuck in needle hole Items with a "*" in the "Page" column should only be handled by a qualified technician. Cause Check Remedy Start backtack Number of start backtack stitches Use parameter number 38 to reduce the number of stitches in the front tack. * If the material is soft, it can be effective to set the number of stitches to 0. Rear tack Rear tack vector shape Use parameter number 31 to set the rear tack vector shape to a rectangle. * Setting the vector shape to a rectangle can be effective when the width is less than the bar tack width. Needle plate Needle plate ・When using knit material, replace with the -3 needle plate. ・Replace with a needle plate with a smaller needle hole. Page 38 38 * 83 HE-800B