JUKI LU-2818-7 Instruction Manual
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JUKI LU-2818-7 Instruction Manual

JUKI LU-2818-7 Instruction Manual

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LU-2810, 2810-7, 2860, 2860-7,
2818-7, 2868-7
INSTRUCTION MANUAL

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Summary of Contents for JUKI LU-2818-7

  • Page 1 LU-2810, 2810-7, 2860, 2860-7, 2818-7, 2868-7 INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    5-3. Adjusting the automatic presser foot lifter ..................34 5-4. Fixing the feed adjusting dial ......................35 5-5. How to change the maximum stitch length (LU-2818-7, LU-2868-7) ..........37 5-6. Normal-/reverse-feed stitch needle entry points alignment at the time of automatic reverse feed stitching (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7) ............

  • Page 3: Specifications

    18 Lubrication Automatic lubrication by oil tank (with oil gauge) 19 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7 20 Bed size 643 mm × 178 mm 21 Space under the arm 347 mm ×...
  • Page 4 Cam-driven scissors type 20 Lubrication Automatic lubrication by oil tank (with oil gauge) 21 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7 22 Bed size 643 mm × 178 mm 23 Space under the arm 347 mm ×...
  • Page 5 Cam-driven scissors type 20 Lubrication Automatic lubrication by oil tank (with oil gauge) 21 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7 22 Bed size 643 mm × 178 mm 23 Space under the arm 347 mm ×...

  • Page 6: Installation

    2. INSTALLATION 2-1. Installation of the sewing machine To prevent possible accidents caused by the full of the sewing machine, perform the work by two persons or more when the machine is moved. Do not hold the pulley and the reverse feed lever.
  • Page 7 Attaching the oil pan Align Table Operator’s side Fix the oil pan ❺ supplied with the machine on the table by tightening ten wood screws. ❺ Align Attach a filter ❻ to the oil pan ❺ as shown in Multi-layered part the figure.
  • Page 8 Securely attach head support rod ❾ until its rib is closely pressed against the table. When it is really necessary to conduct work with the machine head supporting rod re- moved for the purpose of maintenance and repair, it is necessary to carry out the work with two or more persons.

  • Page 9: Installing The Belt Cover And The Belt (Lu-2810, Lu-2860)

    2-2. Installing the belt cover and the belt (LU-2810, LU-2860) 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. (Installation procedure) Put the V-belt on the sewing machine pulley.

  • Page 10: Installing The Oil Shield

    LU-2860, LU-2860-7, LU-2868-7 ❷ ❶ 2-5. Pneumatic components (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7) 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.
  • Page 11 (2) Adjusting the air pressure Decrease Increase The operating air pressure is 0.5 to 0.55 MPa. ❶ Adjust the air pressure using air pressure regu- lating knob ❶ of the filter regulator. In the case fluid accumulation is observed in A section of the filter regulator, turn drain cock ❷...

  • Page 12: Installing The Thread Stand

    2-6. Installing the thread stand Assemble the thread stand, set it up on the machine LU-2810, LU-2810-7, table using the installation hole in the table and tight- LU-2818-7 en nut ❶ gently. ❶ LU-2860, LU-2860-7, LU-2868-7 ❶ – 10 –...

  • Page 13: Installing The Thread Guide Pin

    2-7. Installing the thread guide pin Insert needle thread guide pin ❶ into the corre- LU-2810, LU-2810-7, LU-2818-7 sponding hole in top cover ❷ . ❷ ・ LU-2810, LU-2810-7, LU-2818-7: One needle thread guide pin ・ LU-2860, LU-2860-7, LU-2868-7: ❶ Two needle thread guide pins LU-2860, LU-2860-7, LU-2868-7 ❷...

  • Page 14: Preparation Of The Sewing Machine

    "■ Adjusting the oil quantity in the hook" p.13.) 2. For the oil for hook lubrication, purchase JUKI NEW DEFRIX OIL No. 1 (Part No. : MDFRX1600C0) or JUKI MACHINE OIL #7 (Part No. : MML007600CA). 3. Be sure to lubricate clean oil.
  • Page 15 ❹ ❺ ❻ ■ Adjusting the oil quantity in the hook LU-2810, LU-2810-7, LU-2818-7 Remove rubber cap ❶ . Loosen nut ❷ and turn oil amount adjustment screw ❸ to adjust the amount of oil in the hook. Turning the screw clockwise A will decrease the...

  • Page 16: Attaching The Needle

    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. Switch "off" the motor. LU-2810, LU-2810-7, LU-2818-7 Use 135x17 needles. Turn the handwheel to bring the needle bar to ❷...

  • Page 17: Attaching And Removing The Bobbin

    ❷ ❶ Pass the thread through thread path ❶ in the LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7 inner hook and thread hole ❷ in the lever, and slowly draw the thread. Now, the thread passes under the tension spring.

  • Page 18: Winding A Bobbin

    3-5. Winding a bobbin Pass the thread through sections ❶ to ❹ in the numerical order. Put the thread until the root of bobbin thread clamp ❺ is reached. Then, trim the thread. (The ❶ thread end is retained under the looper thread clamp.) Load a bobbin on bobbin winder shaft ❻...

  • Page 19: Threading The Machine Head

     . LU-2810-7 LU-2810 LU-2818-7 1. Thread guide  is necessary to prevent the thread from slipping off the needle eyelet when per- forming thread trimming at a position which is outside the material. 2. If thread tangling failure occurs when starting sewing from the material edge, the thread should be removed from the location where it is clamped with the spring of thread guide  , or thread guide  should be changed with another one.
  • Page 20 [LU-2860, 2860-7, 2868-7] 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. ❶ ❶ Left-hand needle thread Right-hand...

  • Page 21: How To Set The Model Of The Machine Head

    LU86 ❸ ❹ ❺ ❻ LU-2810-7 L81d LU-2860-7 L86d LU-2818-7 L81L LU-2868-7 L86L After selecting the type of machine switch ❸ ( head, by pressing switch ❹ ), the step proceeds to 94 or 96, and the display automatically changes to the contents of the setting corresponding with the type of ma- chine head.
  • Page 22 Indication LU-2810 LU81 LU-2860 LU86 LU-2810-7 L81d LU-2860-7 L86d LU-2818-7 L81L LU-2868-7 L86L After selecting the type of machine head, by ❷ pressing switch , the step proceeds to 96 or 94, and the display automatically initializes to the contents of the setting corresponding with the type of machine head.

  • Page 23: Adjusting The Machine Head (Lu-2810-7, Lu-2860-7, Lu-2818-7, Lu-2868-7)

    3-8. Adjusting the machine head (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7) • CP-18 Simultaneously pressing switch ❹ and switch ❺ , turn ON the power switch. is displayed A in the indicator and the mode is changed over to the adjustment mode.
  • Page 24 • CP-180 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. Turn the pulley of the machine head by hand until the main-shaft reference signal is detected.

  • Page 25: Adjusting The Sewing Machine

    In the case standard stitch dial ❶ is set at a small pitch value, move feed control lever ❹ up and down several times before starting sewing. Refer to "5-7. Operation switches (LU-2810- 7, LU-2860-7, LU-2818-7, LU-2868-7)" p.39 for the details of the 2P device. – 23 –...

  • Page 26: Thread Tension

    4-2. Thread tension (1) Adjusting the needle thread tension Turn thread tension nut No. 1 ❶ clockwise A to shorten the length of thread remaining on the ❶ top of needle after thread trimming. Turn the nut counterclockwise B to lengthen it. ❷...

  • Page 27: Thread Take-Up Spring

    4-3. Thread take-up spring (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. Loosen screw ❹ . Adjust thread take-up spring ❸...

  • Page 28: Adjusting The Pressure Of The Presser Foot

    4-4. Adjusting the pressure of the presser foot Turn presser spring regulating dial ❶ clockwise A to increase the pressure of the presser foot, or counter- clockwise B to decrease it. Be sure to operate the sewing machine with ❶ the pressure of the presser foot minimized as long as the presser foot securely holds the material.

  • Page 29: Needle-To-Hook Relation

    To protect the relevant parts from contact, shift the thread stand to a position at which the thread stand does not interfere with the control panel. [Only for the LU-2810-7, LU-2860-7, LU-2818-7 and LU-2868-7] To check the needle bar position as described in the aforementioned 2) [i.e., "...the needle bar ascend by 2.3 mm from the lowest position of its stroke"], you may use the display of the main shaft rotation...

  • Page 30: 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 following 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 hook needle guard.

  • Page 31: Adjusting The Bobbin Case Opening Lever

    A of the inner hook to 0.9 to LU-2860, 2860-7, 2818-7, 2868-7 1.1 mm for the LU-2860, -2860-7 and 2868-7, or to 0.7 to 0.9 mm for the LU-2818-7. Tighten setscrews ❼ while pressing bobbin case opening lever ❶ downward and pressing the bobbin case holding lever sleeve ❽...

  • Page 32: Adjusting The Position Of Counter Knife, Knife Pressure And Clamp Pressure

    Loosen counter knife setscrews ❼ . Adjust the distance between the bed slide mounting plane and the counter knife tip to 37 ± 0.1mm for the LU-2810-7 and LU-2860-7, or 34.5 ± 0.1 mm for the LU-2818-7 and LU-2868-7. Then, tighten setscrews ❼ .

  • Page 33: Adjusting The Condensation Stitch (Lu-2818-7, Lu-2868-7)

    4-9. Adjusting the condensation stitch (LU-2818-7, LU-2868-7) 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.

  • Page 34: Adjusting The Amount Of The Alternating Vertical Movement Of The Walking Foot And The Presser Foot

    4-10. Adjusting the amount of the alternating vertical movement of the walking foot and the presser foot Adjust the amount of the alternating vertical move- ment of the walking foot and the presser foot us- ❶ ing dial ❶ . Turn the dial clockwise to increase the amount of the alternating vertical movement of the walking foot and the presser foot, or counterclock- wise to decrease it.

  • Page 35: Resetting The Safety Clutch

    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 following work after turning the power off and ascertaining that the motor is at rest. The safety clutch functions when an excessive load is applied to the hook or the other components dur- ing sewing.

  • Page 36: Adjusting The Automatic Presser Foot Lifter

    5-3. Adjusting the automatic presser foot 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. Turn the power ON.

  • Page 37: Fixing The Feed Adjusting Dial

    5-4. Fixing the feed adjusting dial If the feed adjusting dial moves out of the set po- LU-2810, 2810-7, 2860, 2860-7 sition when the automatic reverse feed device is operated (LU-2810, 2810-7, 2860, 2860-7): Remove rubber cap ❶ . Tighten screws ❷ . ❷...
  • Page 38 To prohibit the adjustment of the feed adjusting LU-2818-7, 2868-7 dial (LU-2818-7, 2868-7): Loosen stitch dial setscrew ❸ (or ❹ ). Remove stitch dial ❶ (or ❷ ) and four washers ❺ . ❹ Insert stitch dial ❶ (or ❷ ) back to its original position and push it in direction A.

  • Page 39: How To Change The Maximum Stitch Length (Lu-2818-7, Lu-2868-7)

    5-5. How to change the maximum stitch length (LU-2818-7, LU-2868-7) Loosen stitch dial setscrew ❶ . Remove stitch ❹ dial ❷ . Loosen dial cover setscrew ❸ . Remove dial cover ❹ . ❶ ❸ ❷ Loosen dial plate setscrew ❺ . Remove dial ❹...

  • Page 40: Normal-/Reverse-Feed Stitch Needle Entry Points Alignment At The Time Of Automatic Reverse Feed Stitching (Lu-2810-7, Lu-2860-7, Lu-2818-7, Lu-2868-7)

    5-6. Normal-/reverse-feed stitch needle entry points alignment at the time of automatic reverse feed stitching (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7) 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.

  • Page 41: Operation Switches (Lu-2810-7, Lu-2860-7, Lu-2818-7, Lu-2868-7)

    5-7. Operation switches (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7) ❶ Alternating vertical movement amount change-over switch If this switch is pressed the amount of the alter- nating vertical movement of the walking foot and the presser foot will be maximized. (Lamp above...
  • Page 42 ❸ Needle lifting switch When the switch is pressed, the needle moves from its lower-end stop position to its upper-end stop position. When raising the machine head which has been tilted, do not hold the operation switch to raise it. ❹...

  • Page 43: Knee Switch

    5-8. Knee switch 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) Installation of the knee switch Install knee switch mounting plate ❶...
  • Page 44 (3) Function setting of the knee switch ・CP-18 ❶ ❷ ❸ ❹ 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 Press (option input/output function selection).
  • Page 45 ・CP-180 ❶ ❸ ❷ Enter the function setting mode referring to "18. FUNC- TION SETTING SWITCH, 1)" in the Instruction Manual for the CP-180. Select function number 12 according to the function set- ting method. Select the item of " " by switch ❸ . Select the displayed number "...

  • Page 46: Function Setting For The Sc-922 (Lu-2818-7, Lu-2868-7)

    5-9. Function setting for the SC-922 (LU-2818-7, LU-2868-7) This section describes how to set the functions of the SC-922 specific to the LU-2818-7 and 2868-7 (Long pitch type). Refer to "6. Function setting for the SC-922" in the Instruction Manual for the SC-922.

  • Page 47: Sewing Speed Table

    Stitch length : More than 7 mm and 12 mm or less of the walking foot and presser foot less mm and 9 mm or less (Only for the LU-2818-7 and -2868-7) 3 or less 3,000 sti/min 2,000 sti/min 1,800 sti/min...

  • Page 48: Troubles In Sewing And Corrective Measures

    8. TROUBLES IN SEWING AND CORRECTIVE MEASURES Troubles Causes Corrective measures ① Thread path, needle point, hook blade ○ Remove the sharp edges or burrs on the 1. Thread breakage (Thread frays or is point or bobbin case resting groove on blade point of hook using a fine emery paper.
  • Page 49 Troubles Causes Corrective measures ① Thread tension given by the tension ○ Decrease the thread tension given by the 5. Thread slips off the needle eyelet at the controller No. 1 is too high. tension controller No. 1. ② The clamp spring has deformed. ○...

This manual is also suitable for:

Lu-2810-7Lu-286Lu-2860-7Lu-2810Lu-2868-72810-7x

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