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Summary of Contents for JUKI FLS-350N Series
- Page 1 Electronic Handstitching Machine FLS-350N Series ENGINEER’S MANUAL 29311107 No.01...
- Page 2 PREFACE This Engineer’s Manual is written for the technical personnel who are responsible for the service and maintenance of the machine. The Instruction Manual for this machine intended for the maintenance personnel and operators at an apparel factory contains operating instructions in detail. And this manual describes “Standard Adjustment”, Adjustment Procedures”, “Results of Improper Adjustment”, and other important information which are not covered in the Instruction Manual.
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Page 3: Table Of Contents
CONTENTS 1. SPECIFICATIONS ..................1 2. EXPLANATION OF UNITS................. 2 (1) Configuration ......................2 (2) Operation panel (1 Operation panel) ............... 3 3. EXPLANATION OF STITCH LENGTH COMPENSATION FUNCTION ..5 (1) Function ........................5 1) In case the upper stitch becomes small ................... 5 2) In case the upper stitch becomes large ................... - Page 4 (16) Adjusting the left looper ..................32 (17) Adjusting the right looper cam ................34 (18) Adjusting the right looper ..................34 1) Adjusting the right looper pin ......................34 2) Adjusting the relationship between the right looper and the needle ..........36 (19) Adjusting the position of the ellipse gear ..............
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Page 5: Specifications
Drum cover open / close protection switch (when opening the drum cover, the sewing machine is not actuated even when the foot pedal is depressed.) Lubricating oil JUKI New Defrix Oil No. 2 (equivalent to ISO VG32) Grease ESSO TEMPLEX Grease N2 containing 10g (Part No. 13552206) -
Page 6: Explanation Of Units
2. EXPLANATION OF UNITS (1) Configuration 1 Operation panel 2 Reverse stitch switch ™ The machine perfomes reverse stitching as long as the push-button is held pressed. The machine resumes normal stitching when the push-button is released. (Caution) Reverse stitching should be carried out at the lowest speed within the range of 1 to 3 stitches. 3 Sewing machine light ™... -
Page 7: Operation Panel (1 Operation Panel)
8 Sewing machine foot pedal ™ The machine changes the sewing speed from low to high by gradually increasing depressing the front part of the foot pedal. ™ After releasing the foot pedal, the needle will stop at the intermediate resting position in its stroke. (The needle has two different intermediate resting positions.) ™... - Page 8 − −...
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Page 9: Explanation Of Stitch Length Compensation Function
3. EXPLANATION OF STITCH LENGTH COMPENSATION FUNCTION (1) Function When changing over the upper stitch length or the lower stitch length (turn ON/OFF the stitch length changing switch.), it is ideal if the stitches are as illustrated in the figure below. Change-over of stitch length Upper stitch... -
Page 10: Needle Bar Curve And Timing Adjustment Chart
4. NEEDLE BAR CURVE AND TIMING ADJUSTMENT CHART 10˚ 20˚ 30˚ 40˚ 50˚ 60˚ 70˚ 80˚ 90˚ 100˚ 110˚ 120˚ 130˚ 140˚ 150˚ 160˚ 170˚ 180˚ Needle bar (upper) 2˚ 42˚ Needle bar (lower) 29.4˚ 90˚ 72.4˚ 75.4˚ Points to be adjusted for each timing •... - Page 11 180˚ 190˚ 200˚ 210˚ 220˚ 230˚ 240˚ 250˚ 260˚ 270˚ 280˚ 290˚ 300˚ 310˚ 320˚ 330˚ 340˚ 350˚ 360˚ 252.4˚ 255.4˚ 360˚ 270˚ 209.4˚ 360˚ 222˚ 182˚ • Adjusting the thread haul • Adjusting the thread path • Adjusting the left looper •...
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Page 12: Standard Adjustment
5. STANDARD ADJUSTMENT (1) Before making the adjustments Standard Adjustment FLS-350N FLS-350NA • NB FLS-351NA Arrow mark Angle board Gear box frame Handle Main unit table (2) Adjusting the home position (adjusting the graduation) Standard Adjustment FLS-350N FLS-350NA • NB Aluminum plate FLS-351NA Handle... - Page 13 Adjustment Procedures Results of Improper Adjustment Adjustment of the respective functions is indicated by angle board affixed to the surface of the handle. Angle indicated by the arrow mark on the gear box cover is the angle shown in the respective adjustment procedures. Adjustment Procedures The home position is indicated by “...
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Page 14: Adjusting The Needle Bar Groove Cam And The Left Looper Cam
(3) Adjusting the needle bar groove cam and the left looper cam Standard Adjustment FLS-350N Gear box cover ø8 Angle board V belt Setscrew B Groove cam wheel Setscrew D Setscrew A Left looper cam 125mm 4-ø9 Positioning hole ø8 Fixing holes Cord Guide metal... - Page 15 Adjustment Procedures Results of Improper Adjustment Disassembly procedure ™ If the position shifts, the timing 1) Loosen setscrew C, and remove the gear box cover. between the left looper cam and the 2) Loosen setscrew F, and turn the guide metal fitting fixing the needle bar shifts, and they come in synchronizer.
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Page 16: Adjusting The Needle Bar
(4) Adjusting the needle bar Standard Adjustment 1) Adjusting the height of the support cylinder of the upper needle bar Locknut Needle bar Elevating boss Upper eccentric pin Upper eccentric pin Bush Crank slide block Setscrew A Support cylinder of the upper needle bar Setscrew B 12 ±... - Page 17 Adjustment Procedures Results of Improper Adjustment Bring the support cylinder of the upper needle bar to its lower stop ™ I f t h e h e i g h t s h i f t s , n e e d l e position (within the range of 42˚...
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Page 18: Adjusting The Timing Of Transferring The Needle
Standard Adjustment 3) Adjusting the timing of transferring the needle Locknut Adjustment nut Rubber washer Upper needle bar Needle Lower needle bar Rubber washer Adjustment nut Locknut 4) Centering the needle bar Connection groove Elevating boss Support cylinder Stop pin Retaining ring Support sleeve Engraved line... - Page 19 Adjustment Procedures Results of Improper Adjustment Loosen the upper and lower locknuts 1 to loosen the adjustment ™ Check that the needle does not nuts. Turn the handle by hand to bring the needle to the transfer move up or down (from up to down, position.
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Page 20: Adjusting The Needle Guide Claw
(5) Adjusting the needle guide claw Standard Adjustment 1) Adjusting the needle and the needle guide claw Setscrew A Slide block Needle guide claws Needle Slide case Needle guide claws 2) Adjusting the thread tension of the needle guide claw Slide block Slide block Slide case... - Page 21 Adjustment Procedures Results of Improper Adjustment Close the needle guide claws, move the slide case, and make closer ™ Position of the needle guide claws the clearance “a” between the needle and the needle guide claws as is not proper, the needle guide narrow as possible so that the needle does not come in contact with claws come in contact with the the needle guide claws.
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Page 22: Adjusting The Timing Of Opening/Closing The Tubular Cam Of The Needle Guide Claw
Standard Adjustment 3) Adjusting the timing of opening/closing the tubular cam of the needle guide claw Lower fixed point 0.5 to 0.8 mm Position to close the needle guide Cam follower Needle guide Setscrew B (4 pcs.) Tubular cam of the needle guide (6) Adjusting the thread path guide Standard Adjustment... - Page 23 Adjustment Procedures Results of Improper Adjustment 1) Turn the handle until the needle guide claws are brought to the ™ If the timing shifts, the needle guide position where they start closing. comes in contact with the needle 2) Loosen four setscrews B, turn the tubular cam of the needle bar bar or the needle guide does not guide (reference value : 86˚), and adjust so that the needle guide catch the thread.
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Page 24: Adjusting The Thread Haul Lever
(7) Adjusting the thread haul lever Standard Adjustment 1) Cam timing Tubular cam A Thread haul lever Tubular cam A Setscrew B 2) Adjusting the thread haul lever Guide metal fitting Setscrew A Thread haul lever − −... - Page 25 Adjustment Procedures Results of Improper Adjustment 1) Turn the handle until the thread haul lever is brought to the position ™ If the timing shifts, causing the where it starts moving from the left end to the right. thread not to enter the drum. 2) Loosen setscrew B, and turn tubular cam A.
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Page 26: Adjusting The Brush Cam
(8) Adjusting the brush cam Standard Adjustment Brush Setscrew A (9) Adjusting the hook finger Standard Adjustment 1) Adjusting the movement amount of the hook finger Guide plate Needle center Hook finger 3 to 6 mm Hook finger Fulcrum shaft − ... - Page 27 Adjustment Procedures Results of Improper Adjustment Loosen setscrew A in the brush cam, and adjust the brush cam so ™ If the timing is too early : that the brush fully closes when the handle is turned until the machine The brush closes before the thread is brought to the position of 185˚...
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Page 28: Adjusting The Rotating Shaft And The Tension Spring
Standard Adjustment 2) Adjusting the rotating shaft and the tension spring Eccentric pin Hook finger Tension spring 0.1 to 1.0 mm Lever Needle Setscrew A 3) Adjusting the clearance between the hook finger and the needle Hook finger Needle Tension spring Setscrew B Eccentric Rotating shaft... - Page 29 Adjustment Procedures Results of Improper Adjustment Turn the handle, and turn the eccentric pin to adjust so that a 0.1 to 1.0 mm clearance is obtained between the hook finger and the needle when the hook finger comes nearest to the needle. Then tighten setscrew A.
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Page 30: Adjusting The Hook Finger To Release The Thread Tension
(10) Adjusting the hook finger to release the thread tension Standard Adjustment Needle Late Thread tension is reduced. Hook finger Eccentric pin Rotating shaft Rotation direction Mark Mark Setscrew A Setscrew Thread tension is maximized. (11) Adjusting the eccentric amount of the eccentric pin Standard Adjustment − ... - Page 31 Adjustment Procedures Results of Improper Adjustment 1) Turn the handle to allow the mark of the rotating shaft and the If the timing to return the hook finger is marks on the eccentric pin to face toward you. excessively retarded, isolated idling 2) The eccentric pin has two marks on its surface.
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Page 32: Adjusting The Lower Feed
(12) Adjusting the lower feed Standard Adjustment 1) Adjusting the feed eccentric boss and the lifting cam Eccentric boss setscrew A Setscrew D Setscrew C Lever Shaft Lower feed dog Lifting cam setscrew B Joint 180˚ 0˚ Lifting cam Eccentric Eccentric boss boss 2) Adjusting the height of the lower feed dog and the throat plate... - Page 33 Adjustment Procedures Results of Improper Adjustment 1) Turn the handle to bring the machine to its home position (0˚). ™ If the upper feed is not synchronized 2) Loosen setscrew A of the eccentric boss, turn the eccentric boss with the movement, it will result in by 180˚, and fix it there.
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Page 34: Adjusting The Upper Feed Dog And The Lower Feed Dog
(13) Adjusting the upper feed dog and the lower feed dog Standard Adjustment Setscrew A Upper feed dog Lever Lower feed dog (14) Adjusting the presser foot Standard Adjustment Setscrew A Setscrew E Presser foot holder (0˚ ) Presser foot Center of needle hole Take-up Lower feed dog... - Page 35 Adjustment Procedures Results of Improper Adjustment 1) Turn ON the power to the machine. ™ If the adjustment is not proper, the 2) Maximize the two stitch length adjusting dials on the control panel. stitch length will be unstable. 3) Loosen setscrew A tp set the lever free. Then adjust so that the upper feed dog meets the lower feed dog by moving the upper feed dog back and forth.
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Page 36: Adjusting The Upper Feed Eccentric Shaft
(15) Adjusting the upper feed eccentric shaft Standard Adjustment Setscrew A Setscrew B Eccentric shaft pin Throat plate Shaft Coupling Eccentric shaft (16) Adjusting the left looper Standard Adjustment Setscrew B Holder Center of the left looper shaft Setscrew A 120 ±... - Page 37 Adjustment Procedures Results of Improper Adjustment 1) Loosen setscrew B. Make the ascending lower feed dog flush ™ Loosen the screw from underside with the throat plate surface by turning the handle. of the upper frame. 2) Make the descending upper feed dog engage with the lower feed When the time is too early ..
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Page 38: Adjusting The Right Looper Cam
(17) Adjusting the right looper cam Standard Adjustment Setscrew A Right looper cam Lever Cam follower (18) Adjusting the right looper Standard Adjustment 1) Adjusting the right looper pin Holder Right looper pin Hexagon nut Setscrew A Actuating 9 ± 0.5 mm lever Bracket Collar... - Page 39 Period Bearings 1 of upper and lower JUKI New Defrix Everyday Oil No. 2 needle bars JUKI New Defrix Upper feed link 2 Once a week Oil No. 2 JUKI New Defrix Feed drive link A Once a week Oil No. 2...
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Page 40: Adjusting The Relationship Between The Right Looper And The Needle
Period Slide blocks 7 of elevating bosses Every six Grease months of the upper and lower needle bars (Lower needle bar) (Upper needle bar) Groove cam wheel 8 Every six Grease Grease the whole surface of the months internal groove. (3) Consumable parts replacing period table •... -
Page 41: Error Codes
8. ERROR CODES If any error is detected while the machine is in operation, the detector buzzer sounds and the corresponding error code is given on the display panel. Even when the error code is given, however, there is a case that the error is simply caused by the disconnection of connector. -
Page 42: Adjusting The Lower Looper
− −... - Page 43 − −...
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Page 44: Adjusting The Command Block And The Proximity Sensor
− −... - Page 45 − −...
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Page 46: Adjusting The Needle Stopping Position
10. TIME CHART Height of support cylinder − −... -
Page 47: Circuit Diagram
11. CIRCUIT DIAGRAM (1) Layout drawing of the control box Black Switch regulator +12 V +12 V Black/White White +12 V +12 V +12 V +12 V VR-1A Speed variable resistor Red/White Black Machine rotation speed Speed variable resistor Green setting variable resistor Speed variable resistor Green/white... -
Page 48: Adjusting The Tension Of The Timing Belt Of The Feed Stepping Motor
(2) Wiring diagram Operation printed circuit board Machine rotation speed setting variable resistor (10A) Stitch changing variable resistor (200 VA) (3A) 100V Stitch changing variable resistor (10A) Drum cover switch Upper/lower stitch length selecting switch Stitch length adjusting setting variable resistor Stitch length adjusting selecting switch AVR1... - Page 49 (3) Cable connection diagram 25210857 25210956 25206756 25206459 25206657 25207457 25208059 25207358 25207853 25208257 25212507 − −...
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Page 50: Adjusting The Angle Of The Foot Pedal, And The Foot Pressure Of The Pedal (Fls-350N Only)
12. DRWAING OF THE TABLE Working is not Working is not necessary because necessary because of 385.5 434.5 of field assembly. field assembly. X-X (1 : 1) surface Melamine decorative board +0.5 21.5 2-2 drilled hole, depth 10 Center of needle Urban white painting (bottom surface) (Y2) - Page 51 ＊ The description covered in this engineer's manual is subject to change for improvement of the TELEX : J22967 commodity without notice. Copyright C 1997-2001 JUKI CORPORATION. All rights reserved throughout the world. 01 · 09 Printed in Japan (E)
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