Brother LS-1717 Скачать руководство пользователя страница 19

Страница: 19 / 20

- 15 -

Adjustment of lower thread tension

Standard

Lower thread tension: 0.3 - 0.35N (30 - 35g)

How to check the tension: Pull cotton thread #50 with tension gauge slowly.

1. Set cotton thread #50 in bobbin case and pull it with tension gauge.

2. Adjust the adjustment screw to tension 0.3 - 0.35N (30 - 35g)

Содержание LS-1717

Страница 1: ...SERVICE MANUAL FOR LS 1717 LS 1817 LS 1717P LS 1717B LS 2020 LS 2020P LS 30 X 3 LS 2000 LS 2250PRW 3 2001 8 2010 ...

Страница 3: ...LIST of UPDATE RECORD 8 2010 Date Added Models Contents LS 2250PRW ...

Страница 4: ...e way 3 Needle swing Parabola 4 Needle down centering 5 Needle position on zigzag to the needle plate 6 Loop lift 7 Height of the needle bar 8 Tension of the timing belt 9 Height of the feed dogs 10 Height of the presser bar 11 Stitch length for forward and backwards stitching 12 Upper tension control dial 13 Bobbin Winding 14 Adjustment of lower thread tension 15 ...

Страница 5: ... Remove accessory table A Loosen and remove the screw then remove the face plate B Loosen and remove the screws then remove the front cover C Loosen and remove the screws lower the presser foot lifter then remove the rear cover D ...

Страница 7: ...river and the race way Standard The shuttle driver should rotate smoothly no play should be felt in the race way Adjustment 1 Loosen setscrews of the driver shaft gear 2 Adjust the clearance of the driver shaft 3 Retighten the setscrews ...

Страница 8: ...the needle is in the descending stroke sideways end movement this at the left side turn the zig zag width dial from 5 0 and back the needle movement should be less than 0 1mm Adjustment Loosen the three zigzag base assembly screws Align the upper shaft gear and the zigzag cam gear Tighten the three zigzag base assembly screws ...

Страница 9: ... in the center of the needle plate hole Adjustment Set the needle position selector to M and the stitch width knob to 0 Loosen the setscrew of the zigzag connecting rod Loosen the fixation screw of the eccentric nut Turn the eccentric nut to make adjustment Retighten the fixation screw of the eccentric nut Retighten the setscrew ...

Страница 11: ...e of the needle Adjustment 1 Set the stitch width knob to 5 then lower the needle to its lowest position at the left side of the needle plate 2 Loosen the setscrews on the drive connecting rod 3 Loosen the fixation screw of the eccentric nut 4 Turn the eccentric nut to make adjustment 5 Retighten the fixation screw of the eccentric nut 6 Retighten the setscrews ...

Страница 12: ...le the shuttle hook point lower edge should be 0 8 1 2mm above the upper edge of the needle eye Adjustment 1 Set the stitch width konb to 5 then lower the needle to its lowest position at the right side of the needle plate 2 Loosen the setscrew of the needle bar 3 Move the needle bar up or down to make adjustment 4 Retighten the setscrew ...

Страница 13: ...nsion of the timing belt Standard The belt should slacken approx 4 6mm under a 2N 200g load Adjustment 1 Loosen the setscrews on the motor holder 2 Move the motor to make adjustment 3 Retighten the setscrews ...

Страница 14: ...m above the needle plate at the highest position Adjustment 1 Loosen the setscrew on the vertical feed arm 2 Loosen the fixation screw of the eccentric nut 3 Turn the eccentric nut to make adjustment 4 Retighten the fixation screw of the eccentric nut 5 Retighten the setscrew ...

Страница 15: ...esser foot and the needle plate should be between 6 0 and 6 5mm Adjustment 1 Raise the presser foot 2 Loosen the screw on the presser bar guide bracket 3 Adjust the height of the presser bar 4 Tighten the screw Note Check that the presser foot and feed dogs are aligned ...

Страница 16: ... There should be a difference of max 10 in the lengths of the forward and backward stitching Adjustment 1 Loosen the setscrew on the reverse sewing regulator shaft 2 Turn the reverse sewing regulator shaft left or right to make adjustment 3 Retighten the setscrew ...

Страница 17: ... Adjustment 1 Remove the tension dial sheet and the stopring 2 Remove the tension dial 3 Turn the adjusting nut left or right to make adjustment 4 Remount the tension dial at zero position then the stopring and the tension dial sheet Note Cotton thread 50 should be used when adjusting the tension Do not include take up spring torque ...

Страница 18: ...bobbin Adjustment 1 Loosen the set screw of the pretension slightly 2 Shift the pretension up or down until even winding is achieved 3 Retighten the set screw 4 Loosen the set screw of the bobbin presser 5 Adjust the bobbin presser until the correct amount of thread is wound 6 Retighten the set screw ...

Страница 19: ...ndard Lower thread tension 0 3 0 35N 30 35g How to check the tension Pull cotton thread 50 with tension gauge slowly 1 Set cotton thread 50 in bobbin case and pull it with tension gauge 2 Adjust the adjustment screw to tension 0 3 0 35N 30 35g ...

Страница 20: ...LS 1717 LS 1817 LS 1717P LS 1717B LS 2020 LS 2020P LS 30 X 3 LS 2000 LS 2250PRW T1010137 Printed in TAIWAN ...