Brother LS-1717 Service Manual
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Also See for LS-1717:
- Instruction manual (82 pages) ,
- Parts reference list (15 pages) ,
- Quick setup (2 pages)
Related Manuals for Brother LS-1717
Summary of Contents for Brother LS-1717
- Page 1 SERVICE MANUAL FOR LS-1717 LS-1817 LS-1717P LS-1717B LS-2020 LS-2020P LS-30 LS-2000 LS-2250PRW 3. 2001. 8. 2010.
- Page 2 • This service manual was compiled for use when repairing the LS-1717 Zigzag Stitch Sewing Machines. • Use this manual, together with the Parts Catalog, when making repairs. • This manual was written based on the most up-to-date product specifications at the time of printing.
- Page 3 LIST of UPDATE RECORD Date Added Models Contents LS-2250PRW 8.2010...
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Page 4: Table Of Contents
CONTENTS Removing order of covers ............................ 1 Clearance between the needle and the shuttle hook point (Shuttle race position)........2 Clearance between the shuttle driver and the race way ................... 3 Needle swing (Parabola) ............................4 Needle down centering ............................5 Needle position on zigzag to the needle plate .................... -
Page 5: Removing Order Of Covers
Removing order of covers • 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). - 1 -... -
Page 6: Clearance Between The Needle And The Shuttle Hook Point (Shuttle Race Position)
Clearance between the needle and the shuttle hook point (Shuttle race position) Standard • The shuttle race should be positioned correctly with respect to the turning direction of the shuttle race.. • Clearance between the needle and the shuttle hook point should be 0.02 to 0.1mm. Adjustment •... -
Page 7: Clearance Between The Shuttle Driver And The Race Way
Clearance between the shuttle driver 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. -
Page 8: Needle Swing (Parabola)
Needle swing (Parabola) Standard The sideways movement of the needle must be equal completed in the up and down motion. When 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 •... -
Page 9: Needle Down Centering
Needle down centering Standard • When the needle position dial is set to “M” and the zigzag dial is set to “0”, the needle should be in the center of the needle plate hole. Adjustment • Set the needle position selector to M and the stitch width knob to 0 •... -
Page 10: Needle Position On Zigzag To The Needle Plate
Needle position on zigzag to the needle plate Standard • When the needle position selector is set at M and the stitch width knob is set at 5, the needle should move within a range of 4.6 to 5.0mm across the needle plate. When the needle is lowered, it should not be too close to either the left or right edge of the needle plate hole. -
Page 11: Loop Lift
Loop lift Standard • When the needle bar moves 1.7 - 2.1mm upwards from its lowest position at the left side, the shuttle hook point should align with the left side 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. -
Page 12: Height Of The Needle Bar
Height of the needle bar Standard • When the needle is at the right side, the shuttle hook point is aligned with the left side of the needle, the shuttle hook point lower edge should be 0.8 - 1.2mm above the upper edge of the needle eye. Adjustment 1. -
Page 13: Tension Of The Timing Belt
Tension 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 - 9 -... -
Page 14: Height Of The Feed Dogs
Height of the feed dogs Standard • The feed dog teeth should be 0.9 - 1.1mm 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. -
Page 15: Height Of The Presser Bar
Height of the presser bar Standard • The clearance between the presser 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. -
Page 16: Stitch Length For Forward And Backwards Stitching
Stitch length for forward and backwards stitching Standard • 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. -
Page 17: Upper Tension Control Dial
Upper tension control dial Standard • A thread tension amount between 0.05 and 0.1N (5 and 10g) should be measured at dial position 0. 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. -
Page 18: Bobbin Winding
Bobbin Winding Standard • The bobbin should wound evenly, up to 75 - 85% of the outer diameter of the bobbin. Adjustment 1. Loosen the set screw of the pretension slightly. 2. Shift the pretension up or down until even winding is achieved. 3. -
Page 19: Adjustment Of Lower Thread Tension
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. - Page 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...