JUKI MEB-3810N Series Instruction Manual
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JUKI MEB-3810N Series Instruction Manual

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MEB-3810N
INSTRUCTION MANUAL
COVERI

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Summary of Contents for JUKI MEB-3810N Series

  • Page 1 MEB-3810N INSTRUCTION MANUAL COVERI...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ..........1 6-4. Performing re-sewing ..........46 6-5. Performing threading ..........47 2. NAME OF EACH COMPONENT ......2 6-6. How to use the counter ..........47 3. INSTALLATION ..........3 6-7. When dropping of the knife is temporarily not desired ..............
  • Page 3 7-37. Setting the soft start ..........64 (6) Standard of replacing time of the gas spring ..... 94 7-38. Setting the number of stitches at the beginning of (7) Replacing the gas spring ..........95 sewing of thread tension ..........64 11.

  • Page 4: Specifications

    DO x 558 Nm90 to 120 (Needle count attached at the time of delivery: Nm110) Safety device Pause switch & automatic stop function at the time of detection of a trouble Lubricating oil JUKI MACHINE Oil No. 18 Main regulator: 0.5 MPa Air pressure Hammer pressure regulator: Standard 0.35 MPa (max. 0.4 MPa) 49.5 ℓ...

  • Page 5: Name Of Each Component

    2. NAME OF EACH COMPONENT ❼ • Hand pulley ❼ The needle bar can be lifted or lowered by hand with the hand pulley. ❾ ❽ ❼ ❶ ❹ ❸ ❷ ❺ ❻ ❶ Temporary stop switch ❺ Control box ❾...

  • Page 6: Installation

    3. INSTALLATION DANGER : 1. The sewing machine should be installed by a trained technician. 2. Contact the distributor or a professional electrician to ask him/her to carry out electric wiring. 3. The sewing machine has a mass of approximately 110 kg. Four or more workers are required to carry out the installation of the sewing machine and adjustment of the table height.

  • Page 7: Drawing Of The Table(Table-Fixed Type)

    (2) Drawing of the table(Table-fixed type) – 4 –...

  • Page 8: Drawing Of The Table (Semi-Sunken Type)

    (3) Drawing of the table (Semi-sunken type) In the case the semi-sunken type machine head is used, the kit for semi-sunken type (part number : 40157881) is required. Prepare the kit simultaneously with the table. In the case the semi-sunken type machine head is used, the table reinforcing plate (part number: 32080707）(supplied with the kit (part number: 40157881)) has to be installed without exceptions.

  • Page 9: Installing The Control Box

    3-2. Installing the control box Install control box ❶ to the location illustrated in the figure using four bolts ❷, four plain washers ❸ and four spring washers ❹ and four hexagonal nuts ❺ ❷ supplied with the unit. 1. Install control box ❶ 30 mm or more away from the stand.
  • Page 10 2) Connecting the power cable Voltage specifications are shown on the power indication tag attached on the power cable and on the rating plate adhered on the power box. Connect the cable which matches the specifications. Power indication tag Rating plate (For example: In the case of 200V) Never use the machine unless the voltage specifications described on the power indicator label are satisfied.

  • Page 11: Taking Out The Sewing Machine

    3-4. Taking out the sewing machine DANGER : 1. The sewing machine should be taken out by a trained technician(s). 2. The sewing machine has a mass of approximately 110 kg. Four or more workers are required to take out the sewing machine. 3.

  • Page 12: Installing The Sewing Machine

    3-5. Installing the sewing machine WARNING : The sewing machine has to be carried by four or more workers. Carry out the installation work on a level place. (1) In the case of the table-fixed type machine head 1) Remove the paper liners from four bolt rubbers B ❶...
  • Page 13 6) Remove machine head fixing bolts ❽. Raise the 6), 7) sewing machine to the 1st step of the hinge stop- per. ❻ ❼ When raising the sewing machine, refer to "3-6. ❹ Raising and returning the sewing machine" p. ❺...

  • Page 14: In The Case Of The Semi-Sunken Type Machine Head

    (2) In the case of the semi-sunken type machine head ❸ ❸ ❶ ❶ ❹ ❺ ❻ ❸ ❷ ❷ ① Installing the table reinforcing plate 1) Fix two table reinforcing plates ❷ on the table ❶ with eight bolts ❸ , eight plain washers ❹ , eight spring washers ❺...
  • Page 15 ④ INSTALLATION 1) Place table ❶, bottom cover stay (front) ❷ and bottom cover stay (rear) ❸ on the ❶ floor. 2) Align bottom cover stay mounting hole A in table ❶ with mounting holes B for the respective bottom cover stays. ❷...
  • Page 16 1. Lift the sewing machine head with four or more people by holding the sections marked with dotted circle as shown in the figure. 2. Do not hold hinge stopper ❻, bottom ❺ of bottom cover D and depressed portion E on the side face.
  • Page 17 5) Holding table ❶ at its four corners with four or more workers, place it on assem- bled table stand  and fix with four bolts , four plain washers , four spring washers  and four nuts . ❶ 1.
  • Page 18 8) Raise the sewing machine to the 4th step of the hinge stopper. When raising the sewing machine, refer to "3-6. Raising and returning the sewing machine" p. 9) Secure the machine head by fixing two bolts , two packings , four plain wash- ers , four bolt rubbers  and four nuts  at two locations on far side of the sewing machine.

  • Page 19: Raising And Returning The Sewing Machine

    3-6. Raising and returning the sewing machine DANGER : 1. Do not lift the sewing machine for any purpose other than for installation, repair or adjustment in order to prevent accidents resulting in personal injuries due to pinching. In addition, the sewing machine has to be lifted for repair or adjustment only by a maintenance technician who is familiar with the machine.
  • Page 20 1) To raise the sewing machine, firstly push feed ❷ base ❷ away from you (in the direction of the arrow), then insert flat-blade screwdriver ❹ into ❻ bottom-cover opening tool slot ❸, turn it counter- clockwise to release the sewing machine up/down lock ❺.
  • Page 21 [To lift the sewing machine from the 3rd to 4th step of the hinge stopper] 6) Hold rib ❶ located on the front side of the bed with your right hand to draw hinge stopper ❻ in direction of arrow A until the lock is released. Then, slowly lift the sewing machine. 7) Hold ribs ❶...

  • Page 22: Installing The Poly Oiler

    3-7. Installing the poly oiler 1) Place the sewing machine in its home position. 2) nstall oil drain cock ❶, oil seal ❷ and washer ❸ ❺ on bottom cover ❺ with four setscrews ❹. 3) Raise the sewing machine. ❷...

  • Page 23: Installing The Regulator And The Manifold

    3-9. Installing the regulator and the manifold 1) Install manifold asm.  on manifold mounting plate ❾ with four setscrews . 2) Install solenoid valve  on manifold mounting plate ❾ with two setscrews . ❾ 3) Install regulator asm. ❶ on table ❷...
  • Page 24 [For the needle thread clamp unit] 1) Install manifold asm. ❶ for the needle thread clamp on manifold ❷ mounting plate ❷ with four set- ❷ screws ❸. ❸ ❸ Setscrew ❸ is M4 hexa- gon socket head screws of which is 30 mm.

  • Page 25: Connecting The Cords

    3-10. Connecting the cords DANGER : To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, carry out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent accidents caused by unaccustomed work or electric shock, request the electric expert or engineer of our dealers when adjusting the electrical components.

  • Page 26: Handling The Cords

    3-11. Handling the cords DANGER : To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, carry out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent accidents caused by unaccustomed work or electric shock, request the electric expert or engineer of our dealers when adjusting the electrical components.

  • Page 27: Installing The Foot Pedal Switch (Optional)

    3-12. Installing the foot pedal switch (optional) DANGER : To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, carry out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent accidents caused by unaccustomed work or electric shock, request the electric expert or engineer of our dealers when adjusting the electrical components.

  • Page 28: Connecting The Air Supply

    3-13. Connecting the air supply (1) Connecting the regulator and the manifold 1) Connect joint ❶ of the regulator and joint ❷ of the ❸ ❷ manifold by means of the air tube ø10 ❸. ❶ [For the needle thread clamp] 1)-1.

  • Page 29: Connecting The Air Tubes

    (2) Connecting the air tubes Connect the respective air tubes coming from the sewing machine head to the respective solenoid valves matching their numbers correspondingly. No.1 No.2 No.3 No.4 No.5 No.6 No.7 No.8 No.15 No.9 No.39 (In the case of the No.10 needle thread clamp) No.16...

  • Page 30: Installing The Air Hose

    3-14. Installing the air hose ■ Connecting the air hose Connect the air hose to the regulator using the hose band and quick-coupling socket joint supplied with the unit. ❸ ■ Adjusting the air pressure ❷ Open air cock ❶. [Main regulator] Pull up and turn air pressure regulating knob ❸...

  • Page 31: Cautions For The Compressed Air Supply (Source Of Supply Air) Facility

    When the supply air contains a considerable amount of carbon and dust Mist separator (Most troubles in the air solenoid valves are caused by carbon.) Be sure to install a mist separator. Standard equipment supplied by JUKI Filter regulator Air solenoid valve Air cylinder Cautions for main piping •...

  • Page 32: Installing The Thread Stand

    3-16. Installing the thread stand 1) Assemble the thread stand asm. and install it in the hole in the rear left part of the table. 2) Tighten locknut ❶ so that the thread stand is fixed. ❶ – 29 –...

  • Page 33: Installing The Thread Guides

    3-17. Installing the thread guides 1) Remove two thread guide plates ❶ and setscrew ❷ ❷. ❶ 2) Reverse one of thread guide plates ❶. Install the thread guides so that they turn by approximately 40° to allow the thread to pass smoothly. ❶...

  • Page 34: Installing The Eye Protection Cover And The Finger Guard

    3-18. Installing the eye protection cover and the finger guard DANGER : The eye protection cover and the finger guard are used to protect eyes against flying broken needle. Be sure to use the sewing machine with them installed without exceptions. 1) Assemble finger guard ❶...

  • Page 35: Installing The Cloth Chip Bag

    3-19. Installing the cloth chip bag 1) Connect cloth chip suction device ❶ and cloth chip tube ❷. Fix them with hose band ❻. ❶ ❷ ❻ 2) Install suspension hook ❸ to an easy-to-access location on the underside of the table. 3) Suspend cloth chip bag ❹...

  • Page 36: Installing/Removing The Presser Unit

    3-20. Installing/removing the presser unit Carefully prevent contact between the cloth trimming knife and the work clamp plate when moving the feed base by hand or installing/removing the work clamp unit. ■How to install ❷ 1) Install the presser unit so that presser lever ❸ fits in the letter “U”...

  • Page 37: Preparation Before Operation

    Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ＊ Use JUKI MACHINE OIL No. 18 as the machine oil. (1) Lubricating the arm oil tank Lubricate arm tank ❶ to such an extent of approxi- mately 80 %.

  • Page 38: Lubricating The Looper And Spreader Components

    (3) Lubricating the looper and spreader components 1) Remove the presser plates, right and left. 2) Apply two to three drops of oil to looper link ❶, ❺ ❸ ❹ spreader link ❷, spreader, right ❸, spreader, left ❹ and spreader actuating cam ❺. ❶...

  • Page 39: Lubricating The Needle Bar And The Gear Section

    (5) Lubricating the needle bar and the gear section Lubricate the components at the time of delivery or after an extended period of disuse. 1) Loosen setscrews ❶ and remove face plate ❷. ❶ ❶ 2) Apply one or two drops of oil to needle bar bushing ❸, needle bar ❹...

  • Page 40: Attaching The Needle

    4-2. Attaching the needle WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. The correct direction of the needle is that needle Insert the needle thread guide ❶ faces the opposite side of groove of until it will go no the needle.

  • Page 41: Threading The Machine Head

    4-3. Threading the machine head WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. (1) Threading the upper thread (needle thread) Ⓑ Ⓐ Ⓐ Ⓒ Ⓑ Ⓒ...

  • Page 42: Threading The Lower Thread (Looper Thread)

    (2) Threading the lower thread (looper thread) For the model provided with the needle thread clamp unit Needle thread trimmer type Gimp Looper thread Thread trimmer retaining plate 1. When passing the looper thread, turn looper bracket by 180 degrees of an angle in advance. 2.

  • Page 43: Threading The Machine With Gimp

    (3) Threading the machine with gimp In case of thin thread, insert gimp in the gimp presser plate. 4-4. How to set the cloth on the sewing machine ❶ ❶ ❷ ❷ ❷ 1) Enter the sewing material until it comes in contact with cloth patches ❶, right and left. 2) Loosen setscrews ❷, right and left and adjust the sewing position by moving the cloth patches to and fro.

  • Page 44: Structure Of The Operation Switch

    5. STRUCTURE OF THE OPERATION SWITCH 5-1. Structure of the operation panel ❶ ❷ ❸ ❹ ❺ ❻ ❽ ❼ ❾ [Table of functions of the operation panel] Description Name ❶ This LED goes out when the sewing machine is in data setting state Sewing LED and lights up when the sewing machine is in sewing state.
  • Page 45 Description Name + / FORWARD This key is used to increment the set value of data or the count value on the counter when setting the data. It is used to move the feed forward by one stitch in the pause state. THREAD This LED lights up when displaying/setting the needle thread tension.

  • Page 46: Temporary Stop Switch

    5-2. Temporary stop switch This switch stops the operation of the sewing machine. Temporary stop switch 5-3. Hand switch [Presser switch (right) ❶] This switch performs up/down of the presser. Start switch lamp [Start switch (left) ❷] This switch performs the start of sewing. When the start switch is effective, the start ❷...

  • Page 47: How To Use The Operation Panel

    6. HOW TO USE THE OPERATION PANEL In the case the sewing machine stops with its needle-bar rested in any position other than the upper end when the READY key is pressed, Error (E030) will occur to stop the sewing machine. In this case, turn the hand pulley to move the needle bar to its upper stop position.

  • Page 48: Temporarily Stopping The Sewing Machine

    6-3. Temporarily stopping the sewing machine ■ How to stop the sewing machine 1) Press temporary stop switch ❶. 2) The sewing machine stops and “E050” is displayed. ■ How to re-start 1) While "E050" is shown on the screen, press RESET ❷...

  • Page 49: Performing Re-Sewing

    6-4. Performing re-sewing Sewing can be performed without cloth-opening operation of the presser foot. ❸ If the Sewing LED stays ON, press the ❶ ❶ Ready key to turn it OFF. ❸ to display the mode setting 1) Press Mode key ❻...

  • Page 50: Performing Threading

    6-5. Performing threading WARNING : Turn OFF the power after operation of steps 1) and 2), and replace needle, thread, cloth cutting knife or hammer. This operation cannot be carried out immediately after power-on. Carry out the following operation ❶ after the origin retrieval of the feed bar/needle bar by pressing once the Ready key ❷...

  • Page 51: When Dropping Of The Knife Is Temporarily Not Desired

    6-7. When dropping of the knife is temporarily not desired  to make Be- 1) Press Knife ON/OFF key fore-cut knife LED F and After-cut knife LED G go out.  again to light 2) Press Knife ON/OFF key up Before-cut knife LED F or After-cut knife LED G to enable the operation of the knife.
  • Page 52 Sewing machine operation under each operation mode (1) NORMAL mode (when the operation mode is set to "0" and the power is ON) Operation is carried out under the normal operation mode where the cloth cutting knife is activated and a sewing sequence such as sewing and thread trimming is carried out by operating the Presser foot switch and the Start switch.

  • Page 53: Changing Procedure Of The Sewing Pattern

    6-9. Changing procedure of the sewing pattern If the Sewing LED stays ON, press the ❶ Ready key to turn it OFF. ❶ ❹ or + key ❺ to select the 1) Press – key pattern number B you want to sew. (The number of pattern which is not registered is not displayed.) ❹...

  • Page 54: Setting Procedure Of The Sewing Data

    7. SETTING PROCEDURE OF THE SEWING DATA In the case the sewing machine stops with its needle-bar rested in any position other than the upper end when the READY key is pressed, Error (E030) will occur to stop the sewing machine. In this case, turn the hand pulley to move the needle bar to its upper stop position.

  • Page 55: Setting The Knife No

    ＊ The data No. is stated in 2-digit LED B and the example of the set value is stated in 4-digit LED C as shown below. ● The setting range is stated in the respective sentences. ● Corrected stitches are represented by the stitch shape as observed from the right side of the material. Wrong side Right side of stitching...

  • Page 56: Setting The Cut-Before/Cut-After Knives

    7-3. Setting the cut-before/cut-after knives Set whether the cut-before knife or the cut-after knife. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼ . The knife can be set within the range given in the ❼...

  • Page 57: Setting The Cut Space

    7-6. Setting the cut space Set the clearance where the knife drops in the parallel section. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼ . ❼ The space can be set –1.2 to 1.2 mm in the increments of 0.1 mm.

  • Page 58: Number Of Stitches Of Sewing End Compensation

    7-9. Number of stitches of sewing end compensation Number of stitches of sewing end can be increased at the same sewing pitch. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼ . ❼ – Without bartack ..1 to 6 stitches –...

  • Page 59: Compensation Of Eyelet In Lateral Direction

    7-12. Compensation of eyelet in lateral direction Position on the top of eyelet can be moved to the right- or left-hand. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼. ❼ Setting can be performed –0.6 to 0.6 mm in the incre- ments of 0.1 mm.

  • Page 60: Compensation Of Left Parallel Section Of A Buttonhole

    7-15. Compensation of left parallel section of a buttonhole Length from the bottom of eyelet to the left side of parallel section can be adjusted. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼. ❼ Setting can be performed －0.6 to 0.6 mm in the in- crements of 0.1 mm.

  • Page 61: Setting The Needle Throwing Width Of The Left Bottom Of Eyelet

    7-18. Setting the needle throwing width of the left bottom of eyelet Needle throwing width of the left side of the bottom of eyelet can be set. Feed base is actuated with the needle throwing to change the sewing width. ❼...

  • Page 62: Setting The Length Of Taper Bar

    7-21. Setting the length of taper bar Set the length of taper bar. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼. ❼ The taper bar length can be set in increments of 1 mm in the range from 3 to 15 mm.

  • Page 63: Setting The Number Of Stitches Of Slant Section Of Taper Bar

    7-24. Setting the number of stitches of slant section of taper bar Number of stitches of the slant section from the taper bar to the parallel section can be set. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼...

  • Page 64: Setting The Number Of Stitches Of Straight Bar

    7-27. Setting the number of stitches of straight bar In this step of procedure, the number of stitches of straight bar is to be set. Set the knife number by means of –/BACKWARD key ❼ ❻ or +/FORWARD key ❼ . The number of stitches can be set according to the straight bar length using the stitch length within the ❻...

  • Page 65: Setting The Number Of Stitches Of Round Bar

    7-30. Setting the number of stitches of round bar The number of stitches of the round bar is set. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼ . ❼ The number of stitches can be set 4 to 20 stitches. In the case the round bar is selected for the ❻...

  • Page 66: Setting The Needle Throwing Width At The Upper Section Of Eyelet Bar

    7-33. Setting the needle throwing width at the upper section of eyelet bar The needle throwing width at the upper section of eyelet bar is set. Change the stitch width by operating the feed base along with the needle throwing operation. ❼...

  • Page 67: Setting The Soft Start

    7-37. Setting the soft start Sewing speed at the sewing start can be limited. Set the knife number by means of –/BACKWARD key ❻ or +/FORWARD key ❼. The soft start can be set in the range from 0 (zero) to ❼...

  • Page 68: Adjustment Of Each Part

    8. ADJUSTMENT OF EACH PART 8-1. Adjusting the pressure of the cloth trimming knife WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, keep away from the looper thread trimming knife and cloth trimming knife during the adjustment procedure.

  • Page 69: Adjusting The Stitch Bite Width

    8-2. Adjusting the stitch bite width WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Open needle rocking adjustment cover ❶. 2) Turn the handwheel to bring the needle bar to its ❷...

  • Page 70: Adjusting The Presser

    8-3. Adjusting the presser WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ■ Adjusting the height of the presser ❶ 1) Remove auxiliary presser plate cover ❶. 2) Loosen screw ❷...

  • Page 71: Adjusting The Presser Opening Amount

    8-4. Adjusting the presser opening amount ■ How to check the cloth opening amount 1) Turn the power ON. Press the READY key to light up the sewing LED. ❸ ❶ 2) Press the knife ON/OFF key to turn off the LED to disable the cloth trimming knife.

  • Page 72: Adjusting The Needle Thread Drawing Amount

    8-5. Adjusting the needle thread drawing amount WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ■ Adjusting the drawing amount of the needle thread at the sewing start Carry out the adjustment with the air supplied.

  • Page 73: Adjusting The Remaining Amount Of The Gimp

    8-7. Adjusting the remaining amount of the gimp WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, keep away from the looper thread trimming knife and cloth trimming knife during the adjustment procedure ❸...

  • Page 74: Needle Thread Clamp Unit (Optional)

    8-9. Needle thread clamp unit (optional) WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. When the clamp of the needle thread clamp unit is in the lower position, standard height A of the underside ❶...

  • Page 75: Adjusting The Brightness Of The Hand Lamp

    8-10. Adjusting the brightness of the hand lamp The brightness of the hand lamp can be adjusted on the operation panel. 1) Select the memory switch operation mode. Refer to "13. MEMORY SWITCH" p. 101 for how to operate the memory switch operation mode. ❹...

  • Page 76: How To Use The Various Functions

    9. HOW TO USE THE VARIOUS FUNCTIONS Refer to "13. MEMORY SWITCH" p. 101 for how to set the memory switches described below. 9-1. Operating procedure of thread tension compensation of each section Thread tension of each section of the sewing shape can be individually changed. The thread tension applied to each section of a buttonhole is the value obtained by adding the respective com- pensated values to the needle thread tension set value (No.
  • Page 77 Compensation Setting item Description position No. Compensation of needle thread tension of sewing start Compensation value of needle thread tension of sewing start Compensation of needle thread tension of sewing end Compensation value of needle thread tension of sewing end Compensation of needle thread tension at the time of Compensation value of needle thread tension at the time of thread trimming of sewing machine ＊1...
  • Page 78 Fig. 2 [Compensation position of straight bar] Data No. 43 Compensation of needle thread tension of top eyelet Data No. 44 Compensation of needle thread Data No. 45 Compensation of needle thread tension of right bottom of eyelet tension of left bottom of eyelet Data No.

  • Page 79: Changing The Setting Position Of Cloth

    9-2. Changing the setting position of cloth The setting position of the material can be changed to the front side or the sewing start position in the case of cut-after knife/without knife. (1) To set the material setting position at the front side for every type of knife setting, i.e., cut-before knife/ cut-after knife/without knife.

  • Page 80: Copying The Pattern Data

    9-7. Copying the pattern data In this step of procedure, the pattern data is to be copied. ❸ If the Sewing LED stays ON, press the ❶ ❶ to turn it OFF. Ready key ❸ to display the mode setting 1) Press Mode key screen.

  • Page 81: Deleting The Pattern Data

    9-8. Deleting the pattern data In this step of procedure, the pattern data is to be deleted. ❸ If the Sewing LED stays ON, press the ❶ ❶ Ready key to turn it OFF. ❸ to display the mode setting 1) Press Mode key ❻...

  • Page 82: Maintenance

    10. MAINTENANCE 10-1. Looper thread trimming (overall thread trimmer type) WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.
  • Page 83 To adjust the timing between the needle and the looper, adjust the needle throwing width and check the needle bar height in advance. The inside needle means the innermost needle entry and the outside needle means the outermost needle entry of the needle throwing width employed for sewing an eyelet buttonhole. 1) Loosen two setscrew ❻...
  • Page 84 3) Adjust with looper driving cam ❸, so that the blade Needle inside point of the left looper is aligned with the center of the needle when the needle bar goes up 3 mm from the lower dead point of the inside needle. Then, fix the looper driving cam by tightening two setscrews ❻...

  • Page 85: Height Of The Needle Bar

    10-3. Height of the needle bar (1) Adjusting the needle bar height WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 86: Adjustment To Prevent Triangular Stitch Skipping In The Case Of A Narrow Needle Throwing Width

    10-4. Adjustment to prevent triangular stitch skipping in the case of a narrow needle throwing width For sewing with the narrow needle throwing width of Throat plate 2 mm or less, the outer needle enters the left side of Spreader, left the looper thread triangle (C section) when the outer needle comes down during sewing in the standard Outer needle...

  • Page 87: Clearance Between The Needle And The Looper

    10-5. Clearance between the needle and the looper WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 88: Clearance Between The Spreader And Looper And The Opening Timing Of The Spreader

    10-7. Clearance between the spreader and looper and the opening timing of the spreader WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.
  • Page 89 Loosen setscrew ❺ in the spreader stopper and adjust the position of spreader stopper ❻. Then fix ❷ ❶ ❻ ❻ the spreader in place. (Make the same adjustment for both left/right spreaders.) ❺ ❺ ● Timing to open/close the spreaders aligned In the case of the outer needle, the correct timing is such that the left spreader completely closes at...

  • Page 90: Height Of The Throat Plate

    10-8. Height of the throat plate (1) Height of the throat plate Install the throat plate at the position where top surface ❷ of the throat plate is 0.4 mm below top surface ❶ ❷ ❶ of the support plate. (2) Adjusting the height of the throat plate The height of the throat plate should be adjusted in the following procedure.

  • Page 91: Position Of The Presser Foot

    10-9. Position of the presser foot WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 92: Installing Position Of The Needle Thread Trimming Knife

    10-11. Installing position of the needle thread trimming knife WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 93: Cleaning

    10-12. Cleaning WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 94: Replacing Consuamables

    10-14. Replacing consuamables (1) Worn-out of the hammer face WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 95: Replacing The Cloth Cutting Knife And The Hammer

    (2) Replacing the cloth cutting knife and the hammer WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 96: Replacing The Looper Thread Trimming Knife (Overall Thread Trimmer Type)

    (3) Replacing the looper thread trimming knife (overall thread trimmer type) WARNING : 1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming knife during work.

  • Page 97: Replacing The Needle Thread Trimming Knife

    ❶ of the bed with a piece of string as shown in the figure at the left, immediately change the gas spring with JUKI's genuine gas spring (part number: 40100390). 1. Do not strap any section of the machine other than front foot section ❶.

  • Page 98: Replacing The Gas Spring

    (7) Replacing the gas spring DANGER Replacement work has to be carried out within the defined range by a service technician who has full knowledge of the machine. 1) Lift the sewing machine until the hinge stopper reaches its 4th step and let the hinge stopper lock the sewing machine.

  • Page 99: Exchanging Gauge Parts And Optional

    11. EXCHANGING GAUGE PARTS AND OPTIONAL 11-1. Throat plate Name of part * (for narrow needle (for wide needle throw- * (for narrow needle (for wide needle throw- throwing width) ing width) throwing width) ing width) Applicable needle 2.0 to 3.2mm 2.0 to 4.0mm 2.0 to 3.2mm 2.0 to 4.0mm...

  • Page 100: Presser Holding Plate

    11-3. Presser holding plate Eyelet buttonhole presser Eyelet buttonhole presser Eyelet buttonhole presser Eyelet buttonhole presser Name of part holding plate, left holding plate, right holding plate, left holding plate, right Shape of hole Eyelet buttonhole Eyelet buttonhole Stitch length 10 to 34 10 to 38 Shape...

  • Page 101: Hammer

    11-5. Hammer Name of part For eyelet buttonhole Name of part For decorative buttonhole Shape Shape Size (mm) Part No. Remarks Size (mm) Part No. Remarks 40115670 14042501 [J accessories] 40115669 32064404 [C accessories] 40115668 32064503 14042600 [J] 40115667 [C] 40115666 32064602 32067209 32064701...

  • Page 102: Troubles And Corrective Measures In Sewing

    12. TROUBLES AND CORRECTIVE MEASURES IN SEWING Phenomenon Cause Corrective measure Page 1. Stitch skipping • The needle is bent. There is a scratch on the • Check and replace the needle. needle. The needle is incorrectly attached. • Kind of needle is wrong. •...
  • Page 103 Phenomenon Cause Corrective measure Page 6. L o o p e r t h r e a d • The looper thread tension is too high. • Adjust the sewing conditions to obtain an appropri- 44, 73 breakage ate thread tension. •...

  • Page 104: Memory Switch

    13. MEMORY SWITCH 13-1. Operating procedure In this step of procedure, the Memory switch setting is to be carried out. ❸ If the Sewing LED stays ON, press the ❶ Ready key to turn it OFF. ❶ ❸ to display the mode setting 1) Press Mode key ❻...

  • Page 105: Memory Switch List

    13-2. Memory switch list Setting Setting Initial Function Description range unit value 400 to Max. sewing speed Max. sewing speed is set 2,500 2,500 sti/min Soft-start speed setting Limited speed at the sewing start of the sewing machine is 400 to 1st stitch (Inside needle →...
  • Page 106 Setting Setting Initial Function Description range unit value After-cut knife temporary stop selection Whether or not the machine is stopped before the after-cut knife operates and the cloth cutting knife is operated by means of the start switch is selected 0 : Normal operation 0 to 1 1 : The sewing machine automatically stops before the...

  • Page 107: Error List

    14. ERROR LIST Description How to reset Sewing machine motor error Turn OFF the power. Sewing machine motor doses not run or signal does not enter even when it is running. Machine head memory error Model type, memory switch data and standard In the case data on the machine head memory has broken (Note 4) patterns are initialized after pressing the reset...
  • Page 108 Description How to reset Faulty main shaft hole sensor/position sensor Turn OFF the power. In the case the hole sensor/position sensor of the sewing machine is faulty Reverse rotation of main shaft motor Turn OFF the power. In the case the main shaft motor rotates in the reverse direction of rotation Emergency stop switch Turn OFF the power.
  • Page 109 Note 1 : Set the thread tension within the range of 0 ≦ thread tension ＋ compensation value of thread tension ≦ 200. Note 2 : L = cut length ＋ taper bar length ＋ Crosswise compensation of left eyelet ＋ Crosswise com- pensation of left parallel section ＋...

  • Page 110: Standard Pattern List

    15. STANDARD PATTERN LIST J type Pattern No. C type Pattern No. Data Setting item Shape Knife No. Cut length Cut-before/cut-after knife Number of stitches of parallel Number of stitches of eyelet Cut space 0.3 0.0 0.3 0.0 0.3 0.0 0.3 0.0 Eyelet space 0.4 0.0...

  • Page 111: Sewing Data Entry Sheet

    16. SEWING DATA ENTRY SHEET Setting item Description Setting range Unit Knife No. Shape of knife *1 0 to 6 Cut length Length of cloth cutting knife Operation of cloth cutting knife Cut-before/cut-after knife 0 to 2 0 : Without knife 1 : Cut-before knife 2 : Cut-after knife Number of stitches of parallel Number of stitches from parallel section to bottom of eyelet 3 to 100 stitch...
  • Page 112 Setting item Description Setting range Unit Compensation of needle thread ten- Compensation value of needle thread tension at right side of sion at right parallel section parallel section Compensation of needle thread ten- Compensation value of needle thread tension at left side of sion at left parallel section parallel section Compensation of needle thread ten-...

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Meb-3810njMeb-3810nc

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