JUKI MO-6800S/DD20 Series Instruction Manual
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JUKI MO-6800S/DD20 Series Instruction Manual

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MO-6800S(D)/DD20 Series
INSTRUCTION MANUAL

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Summary of Contents for JUKI MO-6800S/DD20 Series

  • Page 1 MO-6800S(D)/DD20 Series INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATION ......................1 1-1. Specifications of the sewing machine head .................. 1 1-2. Specifications of the control box ....................1 2. NAMES OF MAJOR PARTS .................... 2 3. INSTALLATION ........................ 3 3-1. Installing the suction device ......................3 3-2.
  • Page 3 7-1. Periodical Maintenance Items ....................... 64 7-2. How to remove the batteries ......................65 8. ADJUSTMENT DIMENSION VALUES ................67 8-1. Dimensions use to adjusting the looper and the needle guard ..........67 8-2. Dimensions related to the position of the thread take-up and the looper thread cam (standard adjustment) ........................

  • Page 4: Specification

    DC × 27 (Standard) Motor DD motor Presser foot lift 5 to 7 mm Lubricating oil JUKI MACHINE OIL #18 Exclusive grease Part number: 23640204 (100 g tube) Grease Part number: 40006323 (10 g tube) Weight 28 kg - Equivalent continuous emission sound pressure level (L ) at the workstation: A-weighted value of 83.0 dB;...

  • Page 5: Names Of Major Parts

    2. NAMES OF MAJOR PARTS ❶ Presser foot lifting lever ❷ Presser foot (asm.) ❸ Thread stand ❹ Oil gauge ❸ ❺ Pulley ❻ Cloth plate cover ❺ ❶ ❹ ❷ ❻ – 2 –...

  • Page 6: Installation

    3. INSTALLATION WARNING : • Machine installation should only be carried out by a qualified technician. • Contact your dealer or a qualified electrician for any electrical work that may need to be done. • The sewing machine weighs 28 kg. The installation should be carried out by two or more people. •...
  • Page 7 3) Fit pipe in Y elbow. [DD23] Connect the Y elbow side of the pipe to the dust bag. Connect the hose side of the pipe to the elbow of the inlet. Connect the air tube A to the solenoid valve A. Connect air tube ③...

  • Page 8: Installing The Table And The Table Stand

    3-2. Installing the table and the table stand 1. After unpacking, do not carry the sew- ❷ ing machine holding the lower section of cloth plate cover ❶ . 2. Do not hold the bottom section of the electrical box cover ❷ . ❶...

  • Page 9: Installing The Pedal Sensor

    3-3. Installing the pedal sensor 1) Ins tal l the pedal sens or to the table wi th mounting screws ❶ supplied with the unit. It is necessary to install the pedal sensor at such a position that the connecting rod is perpendicu- lar to the table.

  • Page 10: Attaching The Connecting Rod

    3-4. Attaching the connecting rod 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 a lapse of 5 minutes or more. Fix connecting rod ❶...

  • Page 11: Air Piping

    3-5. Air piping 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. ［DD22］ 1) Pass air tubes ❶ , ❷ , ❸ and ❹ coming from ❹...
  • Page 12 ［DD23］ 1) Pass air tubes ❶ , ❷ , ❸ and ❹ coming from the air cylinder under the table. ❶ ❷ ❸ ❹ 2) Connect air tubes ❶ , ❷ , ❸ and ❹ to the sole- noid valve located under the table. Connect air tubes A and B coming from the suc- ❷...

  • Page 13: Connecting The Connector

    3-6. Connecting the connector WARNING : • To protect against personal injury resulting from abrupt start of the sewing machine, be sure to turn the power OFF, unplug the machine and wait for five minutes or more before installing the pedal sensor.

  • Page 14: How To Install The Power Plug

    3-7. How to install the power plug WARNING : 1. Be sure to attach the ground wire (green/yellow) to the specified location (on the ground side). 2. Take care not to allow terminals to come in contact with each other. 1) Connect the power cord to power plug ❶...

  • Page 15: Power Switch

    3-8. Power switch 1) Turning the power ON with the power switch ❶ Single phase 220 to 240V The power to the sewing machine is placed in the ON state when the "|" mark side of power switch ❶ (1ø 220 - 240V type) is pressed; or in ❶...

  • Page 16: Lubrication And Drainage

    1) Remove oil sight window ❶ from the oil inlet. Add lubricating oil specifically made for machines which run at a super-high speed (JUKI MACHINE OIL #18) supplied with the unit or equivalent through the oil inlet. When the oil surface reaches the space between two marker lines on the oil gauge, tighten oil sight window ❶ .

  • Page 17: Drainage And Refill The Oil

    4-2. Drainage and refill the oil 1) Loosen the screw ❶ and drain all the oil inside the oil tank. Then, tighten the screw ❶ again. ❶ Needle cooling lubrication oil : SILICON OIL ❷ SILICON OIL SILICON OIL 2) In order to extend the term of usage, please replace the oil after the first four weeks, and then replace it every four months.

  • Page 18: Exclusive Grease Replenishment [Only For The Mo-6800D]

    ❷ 1) Remove grease replenishing rubber plug ❶ from 2) Replenish grease by means of a tip of screw- driver ❸ , ❷ or the like. Use JUKI GREASE A for the needle bar compartment. the replenishment of grease JUKI GREASE A: 40006323 (part number) 2.

  • Page 19: Preparation Before Sewing

    5. PREPARATION BEFORE SEWING 5-1. Threading WARNING : Follow the procedures for threading. Wrong threading can cause stitching troubles such as thread breakage, stitch skipping and puckering. MO-6804 MO-6814 – 16 –...
  • Page 20 MO-6814- △△△ -44H MO-6816 – 17 –...
  • Page 21 MO-6816- △△△ -50H MO-6816- △△△ -60H – 18 –...

  • Page 22: Adjusting The Thread Tension

    5-2. Adjusting the thread tension The thread tension should be adjusted properly according to the kinds and the thickness of the materials, stitch length, and seam width, etc. In addition, adjust the nuts case by case individually. Turn the nuts clock- wisely will increase the thread tension.

  • Page 23: Replace The Needle

    (3) Adjusting the looper thread cam thread guide 1) In the case the looper thread is not appropriately adjusted, thread loops cannot be formed with consistency. ⊖ (Thread can be excessively loos- ⊕ ened or thread loops cannot be formed.) ⊖...

  • Page 24: Adjusting The Stitch Length

    5-4. Adjusting the stitch length 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. Change the stitch length appropriately according to the material to be used, differential feed ratio or other rel- evant factors.

  • Page 25: Replace The Knives

    5-6. Replace the knives 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. ❸ ❹...

  • Page 26: Adjusting The Overedge Width

    5-7. Adjusting the overedge width 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) Turn the pulley to move the upper knife ❹...

  • Page 27: Adjusting The Presser Foot

    5-9. Adjusting the presser foot (1) Adjusting the presser foot position Increase ❶ Decrease ❷ ❹ ❼ ❻ ❺ ❸ * This figure gives an illustration of the MO-6814S 1) Loosen adjusting screw ❶ and screw ❼ of the presser foot. 2) Move the presser foot ❻...
  • Page 28 (2) Adjusting the lift amount of the presser foot ❷ 1 mm ❶ ❸ ❻ ❺ ❹ * This figure gives an illustration of the MO-6814S 1) Turn the pulley to lower the feed dog until the bottom of the presser horizontally comes in contact with the throat plate.

  • Page 29: Adjusting The Feed Dog

    5-10. Adjusting 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 feed dog height ❷...

  • Page 30: The Relationship Between The Needle And The Looper

    5-11. The relationship between the needle and the looper 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) The relationship between the needle and the upper looper When the upper looper moves to the leftmost point, the distance...
  • Page 31 (3) The relationship between the upper looper and the lower looper When the upper and the lower loopers cross, keep them as close as possible. Somehow, the loopers shall not either touch nor col- lide to each other. The clearance of 0.05 to 0.2 mm should be provided between the upper and lower loopers when they are crossing.

  • Page 32: Adjusting The Amount Of Travel Of The Double Chainstitch Looper

    5-12. Adjusting the amount of travel of the double chainstitch looper 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 double chainstitch looper makes elliptic move- ment.

  • Page 33: Operation Procedure

    6. OPERATION PROCEDURE 6-1. Operation panel ❺ ❸ ❼ ❹ ❽ ❻ ❾ ❷ ❶ How to press Function the button Short time This button is used for changing over the current mode to the function setting ❶ mode. Long time This button is used for setting the time.

  • Page 34: Font Comparison Table

    How to press Function the button Short time This button is used for displaying the sensor values. ❾ Long time Keeping this button held pressed changes over the screen to the sensor sensitivity adjustment screen. This LCD displays the current time. " : " blinks on this LCD while the sewing machine is in operation.

  • Page 35: Function Setting

    6-3. Function setting Functions can be selected and set as described below. ❶ . 1) Press The display on the display section A is changed over to display the Function setting No. (P- * *). (The display item that has been previously changed is displayed unless you have turned the power OFF after you changed the setting last time.

  • Page 36: Function Setting Table

    6-4. Function setting table Initial value Item Description Range DD22 DD23 P001 Maximum sewing speed The maximum sewing speed is limited with the function setting number P121. 200-7000 (It can be set under the Service Level mode.) (Unit: sti/mn) Extra- Extra- Gen- High...
  • Page 37 Initial value Item Description Range DD22 DD23 P022 Intermediate sensor ON / OFF set- In the case the front sensor has failed, this function setting number should be set to "OFF". ting (0: OFF / 1: ON) P023 Rear sensor ON / OFF setting This function setting number is enabled only in the case "DD23"...
  • Page 38 Initial value Item Description Range DD22 DD23 P034 Number of stitches to prevent cloth This function setting number is enabled only in the case "DD23" is selected with the function trimming setting number "P125 Model selection". If the rear sensor detects the material before the front thread trimmer operates, the operation of the front thread trimmer will be cancelled.
  • Page 39 Initial value Item Description Range DD22 DD23 P049 Automatic suction ON / OFF Type of operation of the automatic suction can be selected with this function setting number. (0: OFF / 1: Front suction / 2: Rear suction /3: Front and rear suction) P050 Front suction, continuing number of This function setting number is used for setting the number of stitches to be sewn continuously...
  • Page 40 Initial value Item Description Range DD22 DD23 P067 Presser foot lifting during sewing ON This function setting number is enabled when the sewing machine is operated with the foot / OFF pedal (except for the full automatic mode). It is used for setting whether or not the presser foot is automatically lifted when the foot pedal is returned to its neutral position.
  • Page 41 Initial value Item Description Range DD22 DD23 P086 Translucent fabric, correction of ma- The correction value set with this function setting number applies to the threshold of detecting 0-800 terial-detection threshold in the case "1: Translucent fabric" is selected with the function setting number P088. P087 Standard fabric, correction of materi- The correction value set with this function setting number applies to the threshold of detecting...
  • Page 42 Initial value Item Description Range DD22 DD23 Daily target This function setting number is used for setting the daily target number of products to be sewn. 0000-9999 (Unit: Piece) Number of times to count a piece of This function setting number is used for setting the number of times of thread trimming to be 1-50 counted before the number of products increases by one.
  • Page 43 ■ Model selection table Maximum number of Model selection Maximum sewing speed Model name revolutions setting (P125) (P01) initial value (P121) MO-6804S-0E4-30H General 7000 6500 MO-6804S-0A4-150 General 7000 6500 MO-6814S-BE6-40H High lift 6500 6000 M O -6814S - B E6-24H / General 7000 6500...

  • Page 44: Details Of Setting Of The Main Functions

    6-5. Details of setting of the main functions ❸ ❼ ❺ ❹ ❽ ❻ ❾ ❶ ❷ When the manual mode If you change any of the below-stated parameters during sewing, the set value of the is selected parameter will be rendered effective by depressing the back part of the pedal (refer to "6-4.
  • Page 45 ② Selection of the sewing-end speed reduction function (Function setting No. P005) P005 0: Sewing-end speed reduction function OFF 1: Sewing-end speed reduction function ON In addition, the speed limit during the sewing-end speed reduction and the number of stitch at which the sewing-end speed reduction function starts can also be changed.
  • Page 46 Function setting No. P026: It is possible to select either the semi-automatic mode or the free stitching mode with this function setting number. Under the free stitching mode, the sewing machine will not stop as long as the front part of the pedal is held depressed after the completion of thread trimming.
  • Page 47 Sewing mode Full Semi Free Manual Remarks automatic automatic stitching It is necessary to depress For the sake of safety, 〇 ー ー ー the back part of the pedal the pedal operation is when turning the power ON. required only under the full automatic mode.
  • Page 48 ⑦ Selection of the automatic thread trimming function (Function setting No. P029) Operation of the automatic thread trimmer can be selected with this function setting number. P029 0: OFF 1: Front thread trimming 2: Rear thread trimming 3: Front and rear thread trimming ❽...
  • Page 49 ⑨ Selection of the tension release function (Function setting No. P038) This function setting number is used for selecting the tension release operation. P038 0: OFF 1: Front open 2: Rear open 3: Front and rear open (Caution) This function setting number is enabled only when "DD22" is selected with the "P125 Model selection"...
  • Page 50 Function setting No. P043: Used for setting the number of revolutions of the main shaft in the case of manual thread trimming. P043 Setting range: 500 - 7000 [sti/min] <10 sti/min> (Caution) This function setting number is enabled only when "DD22" is selected with the "P125 Model selection (setting of this function is enabled under the Service lev- el).
  • Page 51 Function setting No. P051: Used for setting the continuing number of stitches to be sewn before the rear suction operation stops after the material has passed the intermediate sensor. P051 Setting range: 0 - 50 stitches (Caution) This function setting number is enabled only when "DD22" is selected with the "P125 Model selection (setting of this function is enabled under the Service lev- el).

  • Page 52: Adjusting The Sensitivity Of Sensors

    6-6. Adjusting the sensitivity of sensors It is possible to adjust the sensitivity of the sensors that detect the material placed on the main body (near the needle entry area) of the sewing machine. ❾ 1) Sensor values can be checked by pressing on the normal sewing screen.
  • Page 53 2) Material-detection thresholds of the sensors can be ❾ held pressed on the changed by keeping normal sewing screen. ❾ is held pressed, the materi- Every time al-detection thresholds of the sensors are displayed for changing in the written order repeatedly: Mate- ❼...
  • Page 54 4) Type of fabric for sewing is set with the function setting number P088. P088 0: Transparent fabric 1: Translucent fabric 2: Standard fabric When the transparent fabric is selected, the sensitivity of the sensors is increased to be able to detect the fabric with a higher transmission.

  • Page 55: Of Pcs. Counter

    6-7. No. of pcs. counter The number of pieces produced can be counted. 1) Referring to "6-3. Function setting" p.32, call the function setting number P097 (A). ❷ to display the No. of pcs. counter. Press If you want to return to the normal sewing screen, press 、...
  • Page 56 3) It is possible to set the method to count the number of pieces produced. (Function setting No. J13) 0: OFF 1: Ascending order 2: Descending order 3: Ascending order (audio notification) 4: Descending order (audio notification) The audio notification is given when the function setting number "J05 Audio setting" is set to "ON" and "R"...

  • Page 57: Initialization Of The Function Setting Data

    6-8. Initialization of the function setting data The function setting data you have changed arbitrarily can be stored in memory. If you change the data after- ward, it can be returned to the aforementioned data that you have stored in memory. ❸...

  • Page 58: Hand Led Light

    6-9. Hand LED light Brightness of hand LED light ❶ can be changed by ❻ ❻ pressing . When you keep held pressed for a long time, the light adjustment function is changed over to the color temperature changing func- tion.

  • Page 59: Audio Guidance

    6-10. Audio guidance Audio guidance messages, as described below, are given from the portion A when you turn the power ON/OFF, operate the sewing machine or operate the operation panel. ① When turning the power ON .."It is (day of week), (month) (day)", etc. ②...
  • Page 60 "6- 2) Call the function setting number J06 referring to 3. Function setting" p.32 (C). The sound vol- ume of the audio guidance can be adjusted (function setting No. J06). 1: Small 2: Medium 3: Large ❷ to confirm the sound volume of the Press audio guidance.

  • Page 61: Clock Setting

    6-11. Clock setting The time displayed on the operation panel can be changed. 1) The time change screen is displayed by keeping ❶ held pressed in the normal sewing state. ❼ ❸ ❹ ❽ ❾ ❺ ❶ ❻ ❷ [Year] 2) Firstly the "Year"...
  • Page 62 [Minute and Second] ❷ , the "Hour: Minute" (C) 4) When you press ❺ and is displayed. Change the "Hour" with ❻ if necessary. Change the "Minute" with ❸ and ❹ if necessary. ❷ to proceed to the setting of the Press Confirm ❶...

  • Page 63: Backlight

    6-12. Backlight Brightness of the backlight for the operation panel LCD can be set. It is also possible to set the time to turn OFF the LCD backlight when the operation panel is left without any operation for a predetermined time period. "6- 1) Call the function setting number J10 referring to 3.

  • Page 64: About The Usb

    6-13. About the USB WARNING : The device to be connected to the USB port should have the rated current value or less as shown below. If any device rated current value of which is higher than the rated current value, the main body of the sewing machine or the USB device connected can be damaged or malfunction.

  • Page 65: Pedal Operation

    6-14. Pedal operation [Pedal operation under the semi-automatic mode (factory-set at the time of shipment)] Ⓐ 1) Lightly depress the front part of the pedal to car- ry out low-speed sewing. Ⓑ Ⓑ 2) Further depress the front part of the pedal to car- ry out high-speed sewing.
  • Page 66 [Manual mode] Under the manual mode, the material sensor is disabled. Under this mode, the sewing machine is oper- ated with the pedal or the hand thread trimming switch. Depress the back part of the pedal to lift the presser foot. Depress the pedal to start sewing.

  • Page 67: Maintenance

    7. MAINTENANCE WARNING : 1. Turn off the power switch before carrying out cleaning. The machine may operate if the treadle is pressed incautiously, which could result in injury. 2. Be sure to wear protective goggles and gloves when handling the lubricating oil and grease so that they do not get into your eyes or onto your skin, otherwise inflammation can be resulted.

  • Page 68: How To Remove The Batteries

    7-2. How to remove the batteries The operation panel has a built-in battery in order to allow the clock to work even when the power to the sewing machine is turned OFF. It is necessary to discard the battery properly in accordance with the relevant local laws and regulations.
  • Page 69 ❼ ❽ ❾ Parts No. CR2450 4) Remove connectors ❼ , ❽ and ❾ from the operation panel. 5) Remove PCB fixing screws  (at four locations) to take out PCB  . 6)  installed at the lower part of the front face of the PCB is the battery for clock . 7) Remove the main body of the battery together with its case from the PCB.

  • Page 70: Adjustment Dimension Values

    8. ADJUSTMENT DIMENSION VALUES 8-1. Dimensions use to adjusting the looper and the needle guard WARNING : 1. To avoid possible accidents due to unfamiliarity with the machine, get a maintenance man who has a good knowledge of the machine or serviceman of our distributor to adjust the machine or replace any of its parts.

  • Page 71: Dimensions Related To The Position Of The Thread Take-Up And The Looper Thread Cam (Standard Adjustment)

    8-2. Dimensions related to the position of the thread take-up and the looper thread cam (standard adjustment) 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) Position of the needle thread take-up and the needle thread guide MO-6804 MO-6814**...
  • Page 72 (2) Position of the looper thread take-up and the looper thread guide (Unit : mm) Model MO-6804 11.5 17.5 28.5 MO-6814-2 △ H 21.5 14.5 MO-6814-3 △ H 21.5 14.5 MO-6814-4 △ H 21.5 14.5 28.5 MO-6814-30P 11.5 17.5 28.5 MO-6816-3 △...

  • Page 73: Error Code List

    9. ERROR CODE LIST Error code Description Overvoltage error Low voltage error E03/E03P Communication fault between the operation panel and the electrical box Pedal signal fault Lock error This error is automatically reset when the pulley is turned. Upper stop position cannot be found during operation. Solenoid current is excessively large.
  • Page 74 10. TABLE DRAWING Unit：mm Difference：±2 1200 断面 断面 – 71 –...
  • Page 75 Fully-sunken type table * Auxiliary table is required. Unit : mm Difference : ±2 Weight :12.4 kg ±5% 1200 1020 9- R20 4 - R10 23 0 ø19.5 Through hole A = This part has to be removed when installing the auto hemmer device to the sewing machine.
  • Page 76 Auxiliary table for fully-sunken type table Unit : mm Difference : ±2 Weight :4.25 kg ±5% – 73 –...
  • Page 77 Fully-sunken type table (bracket type) 1200 1020 3-R20 3-R10 4-R10 ø19.5 Through hole A = This part has to be removed when installing the auto hemmer device to the sewing machine. – 74 –...

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Mo-6800d/dd20 series

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