JUKI LH-3528 Instruction Manual
  1. Manuals
  2. Brands
  3. JUKI Manuals
  4. Sewing Machine
  5. LH-3528
  6. Instruction manual

JUKI LH-3528 Instruction Manual

Hide thumbs Also See for LH-3528:
Table of Contents

Advertisement

Quick Links

ENGLISH
INSTRUCTION MANUAL

Advertisement

Table of Contents
loading

Related Manuals for JUKI LH-3528

Summary of Contents for JUKI LH-3528

  • Page 1 ENGLISH INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ......................1 2. NAME OF EACH COMPONENT ..................2 3. INSTALLATION ........................ 3 3-1. Caution at the time of set-up ..........................3 3-2. Installation of the sewing machine ........................4 3-3. Adjusting the height of the knee lifter ......................... 6 3-4.

  • Page 3: Specifications

    3.2 to 3.8 mm Lift of presser foot 2 mm by knee lifter, 5.5 mm by hand lifter lever Lubrication JUKI NEW DEFRIX OIL No.  or JUKI MACHINE OIL #7 Noise Workplace-related noise at sewing speed – n = 2,700 min ≦...

  • Page 4: Name Of Each Component

    2. NAME OF EACH COMPONENT !5� 1 Separately driven needle 6 Pedal !1 Bobbin winder changeover lever 7 Knee pad Knee pad !2 Thread stand (LH-3568, LH-3568-7 only) 8 Power switch !3 Oil supply opening 2 Thread take-up cover 9 Reverse feed switch Reverse feed switch !4 Reverse feed control lever 3 Finger guard...

  • Page 5: Installation

    3. INSTALLATION 3-1. Caution at the time of set-up Transporting procedure of the sewing machine Hold and transport the sewing machine with two persons as shown in the illustration. Caution when placing the sewing machine Do not put protruding articles such as the screwdriver and the like at the location where the sewing machine is placed.

  • Page 6: Installation Of The Sewing Machine

    3-2. Installation of the sewing machine (1) Installing the under cover The under cover should rest on the four corners of the machine table groove. Fix two rubber seats 1 on side A (operator’ s side) using nails 2 as illustrated above. Fix 22.5 mm 18.5 mm two cushion seats 3 on side B (hinged side)
  • Page 7 Insert hinge 6 into the machine main body. Fit the machine head to table rubber hinges 7 and place it on head cushions 8 on the four corners. Attach head support rod 9 to the table. Remove inlet port !0 for circulation which is fixed to the oil tank installing plate, and securely insert it into filter !1 until it goes no further after removing cap !4 which is...

  • Page 8: Adjusting The Height Of The Knee Lifter

    3-3. Adjusting the height of the knee lifter WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. The standard height of the presser foot lifted using the knee lifter is 2 mm.

  • Page 9: Preparation Of The Sewing Machine

    4. PREPARATION OF THE SEWING MACHINE 4-1. Method of lubrication (1) Method of circulating lubrication (when the oil collected in the under cover is reused) Lubrication to hook side Plunger Circulation Oil tank Filter for plunger Filter for plunger 2 Lubrication Circulation Filter for circulation...

  • Page 10: Lubrication To The Oil Tank

    2,000 rpm or less. • For the oil for hook lubrication, purchase JUKI NEW DEFRIX OIL No. 1 (Part No. : MDFRX1600C0) or JUKI MACHINE OIL #7 (Part No. : MML007600CA). •...

  • Page 11: Adjusting The Amount Of Oil In The Hook

    4-3. Adjusting the amount of oil in the hook WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. Oil splashes Oil amount Oil amount...

  • Page 12: Applying Grease

    (the standard is once in 2 to 3 years). In case of the sewing machines with thread trimmer (LH-3528-7 and -3568-7), when the time of grease-up has come, the warning alarm sounds. When the alarm sounds, perform the grease-up.
  • Page 13 [LH-3568, LH-3568-7] Thread take-up lever (oil wick) Felt Needle bar Square block Needle bar bracket Face plate lubrication felt [Common] Remove the rubber cap, take out the felt in A , pour new grease in the hole, and put the felt to which grease has been soaked after removing old grease adhered to the inside of the hole and the felt.
  • Page 14 [Releasing procedure of the grease-up warning] For SC-500 When a certain number of times of sewing has been performed, error code No. 220 1 is displayed in the control box at the time of turning ON the power, and warning buzzer sound five times intermittently. This warning informs of the grease replenishment time of the specified place.

  • Page 15: Installing The Belt Cover And The Bobbin Thread Winder

    Loosen needle clamp screws 2 and pick up two needles 1 in the way that their grooves 3 are facing outwards. Insert the needles into the needle clamp as far as they will go. Tighten needle clamp screws 2 firmly. [LH-3528, 3528-7] – 3 –...

  • Page 16: How To Take Out The Bobbin Case

    3 on the bobbin case from the inside. Put the thread on bobbin threads slack preventer spring 4 . [LH-3528, 3528-7] [LH-3528, 3528-7] Set a bobbin to the bobbin case so that the bobbin turns in the direction of arrow mark A.

  • Page 17: Threading The Machine Head

    ･ Figure A for thin filament thread of #60 or less ･ Figure B for thick filament thread and polyester spun thread of #50 or more 2. Pass right-side needle thread through the upper side of thread guide pin H . 3. Pass the thread through the intermediate thread guide of LH-3528-7 and -3568-7 as follows. ･ Fig. C for polyester spun thread ･ Fig. D for synthetic thread...

  • Page 18: Thread Tension

    4-11. Thread tension WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. Needle thread tension Turn thread tension nut No.

  • Page 19: Thread Take-Up Spring

    4-12. Thread take-up spring WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. (1) When you want to change the stroke of the thread take-up spring To turn Stroke of thread take-up spring 1 on the right is adjustable by moving thread tension No.

  • Page 20: Adjusting The Stitch Length

    To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. [LH-3528, 3528-7] • Adjust the needle and the hook as follows.
  • Page 21 [LH-3568, 3568-7] • Adjust the needle and the hook as follows. [Adjusting procedure for DP X 5 needle] Adjust the stitch dial to 2.5 on the scale. Turn the handwheel to align the blade point of hook with the center of needle when the needle bar goes up by 2.2 mm from the lowest position (lower engraved marker line of the needle bar...

  • Page 22: Adjusting The Needle Stop Position

    (1) Stop position after thread trimming [LH-3528-7, LH-3568-7 only] The standard needle stop position is obtained by aligning marker dot A on the machine arm with white marker dot B on the handwheel.

  • Page 23: Pedal Pressure And Pedal Stroke

    4-16. Pedal pressure and pedal stroke WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. (1) Adjusting the pressure required to depress the front part of the pedal This pressure can be adjusted by altering the...

  • Page 24: Operation Of The Sewing Machine

    5. OPERATION OF THE SEWING MACHINE 5-1. Pedal Operation (1) The pedal is operated in the following four steps: The machine runs at low sewing speed when you lightly depress the front part of the pedal. The machine runs at high sewing speed when you further depress the front part of the pedal.

  • Page 25: Adjusting The Pressure Of The Presser Foot

    5-3. Adjusting the pressure of the presser foot Loosen nut 2 by turning counterclockwise, and turn presser spring regulator 1 to adjust the Decrease Increase pressure. Turn the regulator clockwise to increase the pressure and turn it counterclockwise to decrease the pressure. After the adjustment, tighten nut 2 .

  • Page 26: Thread Tension Release Changeover When Using The Knee Lifter

    3. Just loosen screw 2 , and do not remove it. 5-6. One-touch manual reverse feed (One-touch reverse feed type) [LH-3528, 3528-7] [LH-3568, 3568-7] ・How to use Press switch 1 , and the sewing machine will immediately run in the reverse direction to perform the reverse feed stitching.

  • Page 27: Maintenance

    To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. [LH-3528] Loosen hinge screw 1 after adjusting the...

  • Page 28: Changing Procedure To Needle Feed And The Adjustment

    To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. [LH-3528] The procedure is the reverse of "6-. Changing procedure to bottom feed and the adjustment".

  • Page 29: Adjusting The Hook Needle Guard

    6-3. Adjusting the hook needle guard WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. (Bend outward.) (Bend inward.) 0 to 0.1mm...

  • Page 30: Adjusting The Height And The Inclination Of The Feed Dog

    6-5. Adjusting the height and the inclination of the feed dog WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. (1) Adjusting the height Loosen bottom feed link setscrew 1 , and turn feed driving link shaft 2 to adjust the height.

  • Page 31: Replacing The Gauge

    6-6. Replacing the gauge WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. Drive arm pin Drive arm pin •...

  • Page 32: Adjusting The Thread Presser Spring

    Insert a rod (thin rod, wrench, etc.) into adjusting [LH-3528-7, LH-3568-7 only] hole 2 in thread presser spring base 1 , and loosen setscrew 4 with a hexagonal wrench key of .5 mm.

  • Page 33: Adjusting The Position Of The Moving Knife

    2 becomes the dimension as shown in the list below. B (Left) C (Right) LH-3528-7 LH-3568-7 Set clearance D between moving knife 3 and the inner hook to 0.3 ± 0. mm when moving knife 3 works. Loosen moving knife setscrews 6 and 7 , and adjust the clearance.

  • Page 34: Position Of The Wiper

    6-9. Position of the wiper WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. Needle Adjust engraved marker dot 1 on the machine arm to white engraved marker dot 2 on the handwheel (second white engraved marker dot in the rotating direction of the sewing machine).

  • Page 35: Replacing The Bobbin Thread Slack Preventer Sprlng (For Lh-3568, 3568-7)

    6-11. Replacing the bobbin thread slack preventer sprlng (For LH-3568, 3568-7) Loosen screw 1 and remove bobbin thread slack preventer spring 2 from the groove on the bobbin case. Fit bobbin thread slack preventer spring 2 which replaces the removed spring in the bobbin case through the groove.

  • Page 36: Stitch-To-Angle Table By Gauge (Pitch And Mm Conversion Table)

    7. STITCH-TO-ANGLE TABLE BY GAUGE (PITCH AND mm CONVERSION TABLE) /8"(3.7mm) 5/32"(3.96mm) Number of Number of stitches stitches Turning Turning angle angle 3/6"(4.76mm) 7/32"(5.56mm) Number of Number of stitches stitches Turning Turning angle angle /4"(6.35mm) 9/32"(7.4mm) Number of Number of stitches stitches Turning...

  • Page 37: Gauge Sets

    8. GAUGE SETS (1) LH-3528 Needle gauze size Presser foot asm. inch Tip-divided Tip-divided Lower feed Swivel guide 3/32 22637557 – – – – – 22637656 40035896 – 039852 2262752 2264705 22637755 40035897 – – – – 5/32 3/6 22637854...
  • Page 38 Needle gauze size Feed dog 1.15 1.15 ø1.2 ø1.4 ø1.4 ø1.7 ø2.2 2.2mm inch Option Option 3/32 4003374 – – – – – 4003375 40035883 40033563 – – – 5/32 4003376 – – 40025784 – – 3/6 4003378 40035884 40033564 40025785 B6352D0H 4002580...
  • Page 39 (2) LH-3528-7 Needle gauze size Throat Plate Needle clamp asm. Feed dog ø1.7 ø2.4 2.2mm Option inch 4003588 40026027 40035890 – – 5/32 40025485 40026029 4002587 – – 3/6 40025490 4002603 4002588 4003589 4002583 7/32 4002549 40026033 4002589 – –...
  • Page 40 (3) LH-3568 Feed dog Needle gauze size Needle clamp asm. (DP5) Needle clamp asm. (DP7) Option Option inch (Left) (Right) (Left) (Right) 2262507 4003576 4003577 40035877 40035878 22625206 40035762 40035772 40026063 40026084 5/32 22625305 40035763 40035773 40026065 40026086 3/6 7/32 22625404 40035764 40035774...
  • Page 41 (4) LH-3568-7 Needle gauze size Feed dog Needle clamp asm. (DP5) Needle clamp asm. (DP7) Option Option (Left) (Right) inch (Left) (Right) 4003588 4003576 4003577 40035877 40035878 40025485 40035762 40035772 40026063 40026084 5/32 40025490 40035763 40035773 40026065 40026086 3/6 4002549 40035764 40035774 40026067...

  • Page 42: Troubles And Corrective Measures

    9. TROUBLES AND CORRECTIVE MEASURES TROUBLES CAUSES CORRECTIVE MEASURES Thread 1 There is a sharp edge or burr on the ™ Remove sharp edge or burr using a fine breakage thread path, needle point, hook blade sandpaper. Polish the surface of the (Thread is point or bobbin case resting groove on bobbin case resting groove on the throat...

  • Page 43: Motor Pulley And Belt

    ) Use a clutch motor with an output 400 W (2P). 2) Use M type V belt. 3) The relation between the motor pulley, belt length and number of revolutions of sewing machine is as shown in the list below. LH-3528, LH-3568 Motor pulley Sewing speed (rpm) Belt Outer diameter(mm) Part No.

This manual is also suitable for:

Lh-3528-7

Table of Contents