JUKI LS-2342 Instruction Manual
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JUKI LS-2342 Instruction Manual

JUKI LS-2342 Instruction Manual

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LS-2342, 2342-7
INSTRUCTION MANUAL

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Summary of Contents for JUKI LS-2342

  • Page 1 LS-2342, 2342-7 INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ......................1 2. INSTALLATION ........................ 3 2-1. Attaching the drain container ......................3 2-2. Installation of the sewing machine ....................3 2-3. Pneumatic components ........................5 2-4. Installing the thread stand ......................... 6 3. PREPARATION OF THE SEWING MACHINE ..............7 3-1.

  • Page 3: Specifications

    Cam-driven scissors type 20 Lubrication Concentrated tank type oil wick lubrication (partially by manual) 21 Lubricating oil JUKI New Defrix Oil No. 2 (equivalent to ISO standard VG32) 22 Tube diameter 72 mm 23 Space under the arm 347 mm × 127 mm 24 Hand wheel size Outer diameter : ø123 mm...
  • Page 4 Cam-driven scissors type 20 Lubrication Concentrated tank type oil wick lubrication (partially by manual) 21 Lubricating oil JUKI New Defrix Oil No. 2 (equivalent to ISO standard VG32) 22 Tube diameter 72 mm 23 Space under the arm 347 mm × 127 mm 24 Hand wheel size Outer diameter : ø123 mm...

  • Page 5: Installation

    2. INSTALLATION 2-1. Attaching the drain container 1) Attach oil extractor ❶ onto the top surface of the ❷ machine table, and fix it with setscrew ❷ and wash- ❸ er ❸ . 2) After fixing oil extractor ❶ , screw drain container ❹ ❶...
  • Page 6 3) Fix the sewing machine in the four places of the ma- ❹ chine table with countersunk screws ❹ , washers ❺ and nuts ❻ supplied with the sewing machine. ❺ ❻ 4) Securely attach head support rod ❼ to the table until it goes no further.

  • Page 7: Pneumatic Components

    2-3. Pneumatic components WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. (1) Routing the air tube and cables Pass the air tube and cables ❶...

  • Page 8: Installing The Thread Stand

    2-4. Installing the thread stand Assemble the thread stand, set it up on the machine table using the installation hole in the table and tighten nut ❶ gently. ❶ – 6 –...

  • Page 9: Preparation Of The Sewing Machine

    3. PREPARATION OF THE SEWING MACHINE 3-1. Lubrication WARNING : 1. Do not connect the power plug until the lubrication has been completed so as to prevent accidents due to abrupt start of the sewing machine. 2. To prevent the occurrence of an inflammation or rash, immediately wash the related portions if oil ad- heres to your eyes or other parts of your body. 3.

  • Page 10: Attaching The Needle

    3-2. Attaching the needle WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. Use 134-35 needles.

  • Page 11: Threading The Hook

    3-4. Threading the hook WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. 1) Pass the bobbin thread through threading groove ❶...

  • Page 12: Threading The Machine Head

    3-6. Threading the machine head WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. ❶...

  • Page 13: How To Set The Model Of The Machine Head

    3-7. How to set the model of the machine head • CP-18 1) Call Function Setting No. 95 in reference to "III-6. Function Setting of SC-922" in the Instruction Manual for the SC-922. 2) The type of machine head can be select- switch ❺...

  • Page 14: Adjusting The Machine Head

    3-8. Adjusting the machine head • CP-18 switch ❹ and 1) Simultaneously pressing switch ❺ , turn ON the power switch. is displayed A in the indicator and the mode is changed over to the adjust- ment mode. ❸ ❹ ❺...
  • Page 15 • CP-180 1) Simultaneously pressing switch ❶ and switch ❷ , turn ON the power switch. ❶ ❷ is displayed A in the indicator and the mode is changed over to the adjustment mode. 3) Turn the handwheel by hand until the main-shaft refer- ence signal is detected.

  • Page 16: Adjusting The Sewing Machine

    4. ADJUSTING THE SEWING MACHINE 4-1. Adjusting the stitch length * The scale markings on the stitch dial are shown in mm. [LS-2342S, H] ❸ ❹ Turn standard feed adjusting dial ❶ to align the desired number with marker dot ❸ on the machine dial. ❷...

  • Page 17: Thread Tension

    4-2. Thread tension (1) Adjusting the needle thread tension ❶ 1) [LS-2342S, H] Adjust thread tension No. 1 ❶ so that it tenses the ❸ needle thread extending from it to thread tension No. 2 ❷ does not flap. ❷ [LS-2342S-7, 2342H-7] ❹...

  • Page 18: Thread Take-Up Spring

    4-3. Thread take-up spring ❶ ❶ ❷ (1) When you want to change the stroke of the thread take-up spring Loosen screw ❷ . Adjust thread take-up spring ❶ by moving it in the slot. ❸ ❶ ❹ Decrease Increase (2) When you want to change the tension of the thread take-up spring To adjust the tension of thread take-up spring ❶...

  • Page 19: Needle-To-Hook Relation

    4-5. Needle-to-hook relation WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. Adjust the timing between the needle and the hook fol- lowing the procedure described below.

  • Page 20: Adjusting The Hook Needle Guard

    4-6. Adjusting the hook needle guard WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. When a hook has been replaced, be sure to check the position of the ❶...

  • Page 21: Position Of The Counter Knife And Adjustment Of The Knife Pressure (Ls-2342S-7, 2342H-7)

    4-8. Position of the counter knife and adjustment of the knife pressure (LS-2342S-7, 2342H-7) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. 1) Move the moving knife ❶...

  • Page 22: Operation Of The Sewing Machine

    5. OPERATION OF THE SEWING MACHINE 5-1. Hand lifter To lift the presser foot manually, pull hand lifter ❶ in the direction ❶ of the arrow. This makes the presser foot rise 10 mm and stay at that position. 5-2. Resetting the safety clutch WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest.

  • Page 23: Normal-/Reverse-Feed Stitch Needle Entry Points Alignment At The Time Of Automatic Reverse Feed Stitching (Ls-2342S-7, 2342H-7)

    5-4. Normal-/reverse-feed stitch needle entry points alignment at the time of automatic reverse feed stitching (LS-2342S-7, 2342H-7) When the sewing speed or stitch pitch is changed, the normal- and reverse-feed stitch needle entry points may not be aligned at the time of automatic reverse feed stitching. In such a case, correct the alignment of needle entry points by changing the ON/OFF timing of the automatic re- verse feed cylinder.

  • Page 24: Operation Switches

    5-5. Operation switches When raising the machine head which has been tilted, do not hold the operation switch to raise it. ❶ Alternating vertical movement amount change- over switch (LS-2342S-7, 2342H-7) If this switch is pressed the amount of the alternat- ing vertical movement of the walking foot and the presser foot will be maximized.
  • Page 25 ❸ Needle lifting switch When the switch is pressed, the needle moves from its lower-end stop position to its upper-end stop position. ❶ ❷ ❸ ❹ ❺ ❻ ❹ 2P switch (LS-2342S-7, 2342H-7) Example If this switch is pressed, the stitch length is changed •...

  • Page 26: Knee Switch (Ls-2342S-7, 2342H-7)

    5-6. Knee switch (LS-2342S-7, 2342H-7) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow- ing work after turning the power off and ascertaining that the motor is at rest. (1) Installation of the knee switch 1) Assemble the knee switch ❶...
  • Page 27 (3) Function setting of the knee switch • CP-18 ❶ ❷ ❸ ❹ 1) Enter the function setting mode referring to "6. Setting of functions of SC-922, 1)" in the Instruction Manual for the SC-922. switch ❶ or switch ❷ to call out function setting No.12 (option 2) Press input/output function selection).
  • Page 28 ❶ • CP-180 ❸ ❷ 1) Enter the function setting mode referring to "18. FUNCTION SET- TING SWITCH, 1)" in the Instruction Manual for the CP-180. 2) Select function number 12 according to the function setting method. 3) Select the item of " " by switch ❸ . "...

  • Page 29: Sewing Speed Table

    6. SEWING SPEED TABLE Operate the sewing machine at a speed equal to or lower than the maximum sewing speed selected from those shown in the table below according to the sewing conditions. The sewing speed is automatically set according to the amount of the alternating vertical movement of the walking foot and the presser foot.

  • Page 30: Troubles In Sewing And Corrective Measures

    7. TROUBLES IN SEWING AND CORRECTIVE MEASURES Troubles Causes Corrective measures ① Thread path, needle point, hook blade ○ Remove the sharp edges or burrs on 1. Thread breakage (Thread frays or is worn out.) point or bobbin case resting groove on the the blade point of hook using a fine throat plate has sharp edges or burrs.
  • Page 31 Troubles Causes Corrective measures ① The blades of moving knife and counter ○ Refer to 6. Thread is not cut sharply. "4-8. Position of the count- knife have been improperly adjusted. er knife and adjustment of the knife pressure (LS-2342S-7, 2342H-7)" p.19.

This manual is also suitable for:

Ls-2342s-7Ls-2342-7Ls-2342hLs-2342sLs-2342h-7

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