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Sunstar Precision SWF G Series Manual

Multi-head automatic embroidery machine
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MANUAL
MULTI-HEAD AUTOMATIC
EMBROIDERY MACHINE
SWF/G-Series
LCD Monitor Operation
●
M M M M E E - -
S S U U N N S S T T A A R R P P R R E E C C I I S S I I O O N N C C O O . . , , L L T T D D . .

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  • Page 1 MANUAL MULTI-HEAD AUTOMATIC EMBROIDERY MACHINE SWF/G-Series LCD Monitor Operation ● M M M M E E - - S S U U N N S S T T A A R R P P R R E E C C I I S S I I O O N N C C O O . . , , L L T T D D . .
  • Page 2 THIS IS AN INSTRUCTION FOR SAFE USE OF MULTI-HEAD AUTOMATIC EMBROIDERY MACHINES. READ THOROUGHLY BEFORE USE.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS ..........................CHAPTER 1 SAFETY RULES ............... CHAPTER 2 MACHINE INSTALLATION AND ASSEMBLY 2-1) INSTALLATION ENVIRONMENT ..................2-1 2-2) ELECTRICITY INSTALLATION ..................2-1 2-3) LEVELING THE MACHINE ....................2-2 2-4) PERIPHERALS ASSEMBLY ....................2-4 ...................... CHAPTER 3 NAMES OF MACHINE PARTS ...................
  • Page 4 ..................CHAPTER 10 MAINTENANCE AND INSPECTION 10-1 10-1) CHECK POINTS FOR REGULAR INSPECTION ............10-1 10-2) CLEANING ........................10-1 10-3) OIL SUPPLY ........................10-3 10-4) DRIVE BELT TENSION ....................10-6 ..................CHAPTER 11 MAJOR MACHINE ADJUSTMENTS 11-1 11-1) ADJUSTING THE TRIMMERS ..................11-1 11-1-1) ADJUSTING THE INSERT ANGLE OF MOVABLE BLADE .......

  • Page 5: Chapter 1 Safety Rules

    CHAPTER SAFETY RULES The following set of safety rules categorized as , and indicates possibilities of DANGER WARNING CAUTION physical or property damages if not fully observed. : These safety instructions MUST be observed to be safe from danger when installing, delivering, or DANGER repairing the machine.
  • Page 6 2) Using a Forklift Make sure that size and weight of the forklift is sufficient to support the machine. Use the pallet to place the machine so that its center is on the forklift arm (see [Fig.1-2]). Lift the machine carefully so that the machine does not tilt to either side.
  • Page 7 The SWF Automatic Embroidery Machine is designed for applying 1-3) MACHINE embroidery to fabric and other similar materials. OPERATION Pay careful attention to the stickers on certain WARNING CAUTION parts of the machine. Make sure to observe the following when operating the machine: 01) Read thoroughly and fully understand the manual before operating the WARNING...
  • Page 8 1-5) Placement of Observe the directions on ALL warning stickers placed on the machine as Warning Sticker reminders for your safety. WARING Fire or death may be caused by high voltage electric shock. Don’t open the cover except for service man assigned by SWF. When open the cover turn off power and wait for 6 minutes.
  • Page 9 1-6) Contents of A) WARNING Warning Stickers WARNING Injury may be caused by winding. Be sure to turn off the power before cleaning, lubricating, adjusting or repairing. [CAUTION] Safety cover refers to all covers near the operating parts of the machine. WARNING Injury may be caused by moving needle.

  • Page 10: Chapter 2 Machine Installation And Assembly

    CHAPTER MACHINE INSTALLATION AND ASSEMBLY Install your machine in an appropriate environment and with adequate electrical supply. Failure to follow the directions may result in machine malfunction. 2-1) INSTALLATION ENVIRONMENT 1) Temperature: 0 ~ 40℃ (32 ~ 104℉) when the machine is in operation －25 ~ 55℃...

  • Page 11: 2-3) Leveling The Machine

    2-3) LEVELING THE MACHINE The machine must be accurately leveled (especially front and back) to prevent the needle from moving out of position as well as machine error. 1) Use the adjusting bolts installed at the four stands to level the machine (front, rear, left, and right). Use a level gauge.
  • Page 12 3) Using the level gauge Level gauge [Fig.2-3] [CAUTION 1] The level gauge does not measure accurately on a pipe or a table. ③ Fasten the bolts snugly when the machine is horizontally leveled. ④ Install the supporting bolt as shown in [Fig.2-4]. Turn the bolt until it touches the machine and turn additional 1/4 round.

  • Page 13: 2-4) Peripherals Assembly

    2-4) PERIPHERALS ASSEMBLY 1) Assembling Upper Thread Stand Thread holder structure Support Spool plate [Fig.2-5] 2) Assembling Operation Box Operation box Frame contact line [Fig.2-6]...

  • Page 14: Chapter 3 Names Of Machine Parts

    CHAPTER NAMES OF MACHINE PARTS 17 15 [Front] [Side] [Fig.3-1] [Back] 1) Machine Body 10) Head 19) X, Y driver box 2) Table 11) Thread tension adjustment board 20) Main power switch 3) Upper thread stand 12) Sub-controller 21) Lamp 4) Main shaft drive motor 13) X-axis driving system 22) Leveling base...

  • Page 15: Chapter 4 Features And Specifications

    CHAPTER FEATURES AND SPECIFICATIONS 01) EXPANDED MEMORY SIZE The machine can store a maximum of 100 designs. The basic memory size is 2 million stitches. 02) MIRROR IMAGE CONVERSION AND DESIGN DIRECTION You can turn the design from 0�to 359�in the increments of 1�and also reverse the design in the X direction (mirror image).
  • Page 16 12) AUTOMATIC TRIMMING The automatic trimming function, determined by the design and the machine set-up, enhances work productivity and quality of the finished product. 13) AUTOMATIC DETECTION OF UPPER AND LOWER THREAD BREAKS The machine detects when the upper thread breaks or the lower thread is out of the needle and automatically stops the machine.

  • Page 17: Chapter 5 Functions For Basic Machine Operation

    CHAPTER FUNCTIONS FOR BASIC MACHINE OPERATION 5-1) NAMES AND FUNCTIONS OF PARTS IN OPERATION BOX [Front] ① ② ④ ③ ⑦ ⑤ ⑧ ⑥ [Fig.5-1] ① LCD Menu Screen A color monitor that shows all data related to work. ② Number Buttons This is used to input numbers when setting parameters.
  • Page 18 [CAUTION] CHANGING NEEDLE BAR WITH “CL” KEY If you want to change the order of the needle bar during operation. Input the desired needle number and press “CL”. [Right] [Bottom] ① ② ③ ⑨ ⑧ ⑦ ④ ⑥ ⑤ [Fig. 5-3] [Fig.

  • Page 19: 5-2) Emergency Power And Start/Stop Buttons

    5-2) EMERGENCY POWER AND START/STOP BUTTONS 1) Emergency Power Switch When starting the machine from initial stage, ① Turn on the main power. ② Press the emergency power switch (blue color). ③ Emergency power switch will not turn on if the main power is off. Emergency power switch Main power switch [Fig.5-5]...

  • Page 20: 5-3) Bar Switch

    5-3) BAR SWITCH Refer to [Fig.5-6] for use of the bar switch. Bar switch Right Left [Fig.5-6] Use the bar switch to: ① Start the embroidery work or stop the machine during operation. ② Move the frame back during machine stop. ③...
  • Page 21 ③ For forward non-stitching (during machine stop) Refer to p.7-10 for floating functions during machine stop. BUTTON OPERATION MACHINE OPERATION Push to right Frame moves forward in selected movement units (see Note 2) Frame starts to move forward. If you release the switch before the machine goes 10 of the selected Hold to right stitches, the machine will stop immediately (the machine moves forward in the selected movement units).

  • Page 22: 5-4) Lamp On Thread Tension Adjustment Board

    5-4) LAMP ON THREAD TENSION ADJUSTMENT BOARD 1) Switch ① For normal operation, turn the toggle switch on to turn on the indicator lamp. ② If the machine stopped after detecting a thread break, move the frame back to the location of the thread break and restart the machine.

  • Page 23: 5-5) Needle Stop Clutch

    5-5) NEEDLE STOP CLUTCH The needle bar will operate when you push the clutch so the red mark on the clutch faces you. To stop the needle bar, turn the clutch 90� in the direction shown in [Fig.5-8]. Head Clutch [Fig.5-8] ①...

  • Page 24: 5-6) Lamp On Color Change Box

    5-6) LAMP ON COLOR CHANGE BOX Needle position lamp on the color change box blinks at the needle currently in operation. Needle set lamp on the box blinks when the needle reaches the center of the needle hole on the plate (the roller is on the straight line movement of the color change cam.

  • Page 25: 5-7) Upper Threading And Tension Adjustment

    5-7) UPPER THREADING AND TENSION ADJUSTMENT 1) Upper Threading Upper thread stand Upper thread (from the upper thread stand) Sub thread adjuster Thread tension adjustment board Thread detecting roller Take-up spring stopper Take-up spring Rotary tension disk Main thread tension adjuster Upper thread guide Thread guide (upper)
  • Page 26 Threading the main Threading the sub Threading the thread Threading around the tension adjuster detector roller tension adjuster needle Upper thread Thread guide holder spring Thread Sensing Roller (lower) One and One turn Thread Guide Disk half turn (Pass through the Rotary Tension Disk middle of shaft) Feed the thread through...
  • Page 27 3) Take-Up Spring ○ ○ Correct Position of Take-up Spring × × Incorrect Position of Take-up Spring Take-up spring unable to contact the stopper Take-up spring contacts the stopper Stopper (dust or foreign substances in the stopper) Take-up spring [Fig.5-14] ①...

  • Page 28: 5-8) Lower (Bobbin) Threading And Tension Adjustment

    5-8) LOWER (BOBBIN) THREADING AND TENSION ADJUSTMENT 1) Lower Threading ① Use cotton yarn (#80-#120) for your lower thread. ② Threading the bobbin: � Insert the threaded bobbin into the bobbin case with the thread coming out from the case slot. Pull the thread through the thread guide.

  • Page 29: 5-9) Bobbin Winder

    5-9) BOBBIN WINDER 1) Names and Functions of Major Parts � ⑥ ⑧ � ⑤ ③ ④ ② ① � � ⑬ � � ⑦ ⑨ ⑫ ⑪ ⑩ ⑮ ⑭ [Fig.5-18] ① Power SW: main power switch ② Time: adjust the volume of the thread on the bobbin (MIN ↔ MAX) ③...
  • Page 30 2) Bobbin Winding ① Install the bobbin onto the winding shaft and manually wind the thread 5-6 times around the bobbin in the desired direction. Press [START] to rotate the bobbin. ② Winding will stop automatically according to the pre-set timer. However, if you want to stop the winding, press STOP.
  • Page 31 5) Product Specification Machine size Package size Model Name Speed Power supply (pure weight) (total weight) AC 110/220V BW-02 420×155×125 450×190×170 3,200rpm 50/60Hz (Bobbin Winder) 3.9kg 4.5kg 6) Precautions ① Make sure to check the voltage supply before use. (SWF machines can use either 100V or 220V, but the default is 220V. To change to 110V, adjust the voltage switch underneath the machine).

  • Page 32: 5-10) Floppy Disks

    5-10) FLOPPY DISKS Make sure to meet the following guidelines when using floppy disks. [CAUTION] You can use pre-formatted disks, but be sure to use disks of recognized quality. ① Keep the disks away fro objects with magnetic fields such as televisions. ②...

  • Page 33: 5-11) In And Out Of Designs

    ■ ■ DISK IN [Fig.5-23] ① Press the acryl cover of the disk drive to open (as shown in the left picture of [Fig.5-23]. ② Insert the floppy disk into the drive in the direction shown in the right picture of [Fig.5-23] ■...

  • Page 34: 5-13) Needle-Hook Timing Control

    5-13) NEEDLE-HOOK TIMING CONTROL 1) Needle ① It is very important to select the right needle for the type of thread and fabric used. ② Inappropriate needle may cause bad embroidery, thread breaks, skipped stitches, etc. ③ For normal embroidery, use a DB×K5 needle. [CAUTION] DB×K5 needle has an eye twice larger than that of DB1 (used for normal sewing).
  • Page 35 ② When inserting the needle, make sure that the groove Needle insert on the front of the needle is facing the front. Shaft of hole the needle should be inserted completely into the needle bar. Front groove of the needle [Fig.5-25] [CAUTION 1] For special threads such as artificial silk, turn the needle slightly to the right to...
  • Page 36 4) Relationship between Needle and Hook ① Adjusting Timing between Needle and Hook Default timing of the needle and the hook is set at the main shaft angle of 201� . Refer to the below for relationship between the needle and the hook. Hook point Top point of hook circumference...
  • Page 37 [CAUTION] Functions by Needle Shape ① Size of the hole and groove differs by needle. � Front groove: protects the thread from the heat of the Front groove sewing friction (which may cause thread breaks). � Back groove: helps regulate the hook timing and prevents looping.
  • Page 38 5) Relationship between the Take-up Lever and the Hook Hook point timing is directly related to thread tension and thread breaks. The following pictures show the location of hook when the take-up lever starts to move up from the lower dead stop (main shaft rotation angle: 291� ). Fast Hook Timing Groove of the hook is in the (A) range.

  • Page 39: 5-14) Assembly And Functions Of Thread Detector

    5-14) ASSEMBLY AND FUNCTIONS OF THREAD DETECTOR 5-14-1) Functions of the Thread Detector Detection of the breaks of upper or lower threads prevents ill quality embroidery. The thread- break detector unit contains rollers that sense the smooth feeding of the thread. Any dust, thread remnants, etc. will interfere the rollers’...

  • Page 40: Chapter 6 Basic Machine Operation

    CHAPTER BASIC MACHINE OPERATION TURN ON THE MAIN POWER � PRESS POWER ON SWITCH IN THE BAR SWITCH BOX � IS THE OPERATIONG SYSTEM IN MEMORY? � ARE F1, F2, F7 PRESSED? � INSTALL OPERATING SYSTEM � � ARE THERE PREVIOUSLY WORKED DESIGNS? ARE THERE DESIGNS IN MEMORY? �...

  • Page 41: Chapter 7 Operation Box

    CHAPTER OPERATION BOX SWF AB-Version ※ ※ [NOTE] Refer to Sun Star’ ’ s LCD Monitor Manual [SWF AB Version] for details of the operation box.

  • Page 42: Chapter 8 Error Messages And Correction

    CHAPTER ERROR MESSAGES AND CORRECTION 8-1) MAIN SHAFT MOTOR ERROR CAUSE CORRECTION MAIN SHAFT MOTOR: Use a lever to adjust the shaft angle Main shaft didn’ t stop at 100� INCORRECT STOP at 100� MAIN SHAFT MOTOR Turn the main switch OFF and ON Error in main shaft motor driver DRIVER ERROR again.

  • Page 43: 8-4) Encoder

    8-4) ENCODER ERROR CAUSE CORRECTION Check encoder cable connection. ERROR IN MAIN SHAFT Error in main shaft encoder A Turn the main power OFF and ON ENCODER A again. Check encoder cable connection. ERROR IN MAIN SHAFT Error in main shaft encoder Z Turn the main power OFF and ON ENCODER Z again.

  • Page 44: 8-6) Memory

    8-6) MEMORY ERROR CAUSE CORRECTION No embroidery data in the Save the data in memory using disk NO DATA IN MEMORY memory. or tape. Not enough memory space for NO SPACE IN MEMORY Delete unnecessary data. data storage. MEMORY FULL Memory is full.

  • Page 45: Chapter 9 Control Box

    CHAPTER CONTROL BOX 9-1) MAIN CONTROL BOX 9-1-1) Inside the Control Box ⑥ ⑧ ③ F5 ④ F6 ① F3 ⑤ F7 ② F4 external outlet ⑦ [Fig.9-1] Inside Control Box ① -250V 15A: Fuse for picker solenoid ② -250V 15A: Fuse for picker solenoid ③...
  • Page 46 9-1-2) Outside the Control Box ② ① [Fig.9-2] Outside the Control Box ① Power supply terminal for tape reader and winder ② Fuse for picker solenoid...

  • Page 47: 9-2) Main Shaft Motor Drive

    9-2) MAIN SHAFT MOTOR DRIVE ① OP: connect to Remote Operator ② Screen: displays the condition of main shaft driver and errors. ③ CN2: cable for the main shaft encoder ① ④ CN1: control signal cable ⑤ CNA: control and power input cable for motor ⑤...

  • Page 48: 9-3) X, Y Motor Drive

    9-3) X, Y MOTOR DRIVE ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ [Front] ① Y-axis driver ⑥ RESET ② X-axis driver ⑦ Dip switch plate ③ Main power lamp ⑧ Heatproof plate ④ Rotary switch 1 ⑨ Cooling fan ⑤...
  • Page 49 ⑤ ④ ③ ② ① [Back] ① CN1: power connector for motor ④ CN3: power connector for motor control ② CN2: main power connector (DC310V) ⑤ CN4: power connector for motor control signal ③ CN5: power connector for cooling fan (no cable connection)

  • Page 50: Chapter 10 Maintenance And Inspection

    CHAPTER MAINTENANCE AND INSPECTION 10-1) CHECK POINTS FOR REGULAR INSPECTION Safety rules must be observed during the inspection. CAUTION 1) Clean, oil, and grease the set parts of the machine on a regular basis. 2) Inspect tension of each driver belt. 3) Failure to perform regular inspections may cause the following: �...
  • Page 51 Hook ② Guide rail ① to the take-up lever Trimmer motor box Movable blade Lower thread holder ③ Fixed blade ④ [Fig.10-1] 10-2...

  • Page 52: 10-3) Oil Supply

    10-3) OIL SUPPLY Make sure to turn the power OFF during oil supply. SunStar is not responsible for machine damages or wear-outs caused by the operator’ s insufficient oiling. CAUTION 1) Oil supply Use the SWF sewing machine oil (Spindle Oil) or ISO-standard VG18. Oiling cycle Ref.
  • Page 53 2) Grease supply Make sure to turn OFF the main power during the grease supply. CAUTION Use high-quality mineral-based lithium grease. Where to Grease Greasing cycle Reference Fig. Inside the arm ① Take-up lever drive cam Once in 6 months ②...
  • Page 54 Turn OFF the main power during the grease supply. CAUTION Use lithium-type grease (JIS No.2) - Albania No.2. Where to Grease Greasing cycle Reference Fig. Head drive LM guide Once a month ① [CATUION] Do NOT grease the parts not indicated (needle bar, hook, etc.) ①...

  • Page 55: 10-4) Drive Belt Tension

    10-4) DRIVE BELT TENSION Turn OFF the main power when inspecting drive belt tension. CAUTION Too weak or too tight tension on the drive belt may cause machine malfunction or damages (abnormal wear-out of drive unit). Inspect the driver belt on a regular basis. Location for inspection Inspection cycle Inspection cycle...

  • Page 56: Chapter 11 Major Machine Adjustments

    CHAPTER MAJOR MACHINE ADJUSTMENTS Turn OFF the main power when adjusting the machine. WARNING 11-1) ADJUSTING THE TRIMMERS 11-1-1) Adjusting the Insert Angle of Movable Blade The movable blade is started by the trimmer cam in the angle it is inserted. As one of the basic trimming functions, it arranges the upper thread tails in the needle after trimming.

  • Page 57: 11-1-3) Adjusting Blade Tension

    11-1-3) Adjusting Blade Tension Make sure to check and adjust the cross-tension of the movable and the fixed blades after replacement or repair. ① Checking the cross tension Unfasten the crank of the movable blade. Manually move the movable blade and cut the upper and the lower threads.

  • Page 58: 11-1-4) Adjusting Trimmer Return Spring

    11-1-4) Adjusting Trimmer Return Spring 1) Function of the Trimmer Return Spring: the spring detects if the movable blade has returned to its correct position after trimming. It stops the machine to protect from possible damages of needle and the movable blade, which may occur if the machine is operated without the blade returned.

  • Page 59: 11-3) Adjusting Upper Thread Holder

    11-3) ADJUSTING UPPER THREAD HOLDER ① Adjusting Sensor Adjustment Rings Make the following adjustments if you find errors in the wiper return system. ⓐ Open the cover of the wiper motor. Of the two sensor adjustment rings, align the center of the sensor screw in the rear ring with the #1 carve point on the fixed block on the cam shaft.

  • Page 60: 11-4) Adjusting Height Of The Presser Foot

    ④ If there occurs a trimming or jump problem on a particular head during the embroidery, operate the wiper clutch to protect the embroidery and the wiper. � Press and turn the wiper clutch counterclockwise to operate the wiper clutch. Press and turn it clockwise to stop the operation.
  • Page 61 2) When the Presser Foot is Too High ① Needle In [Fig.11-11] shows the presser foot fails to press the work material when the needle pierces into the fabric, causing an unstable needlework. ② Needle Out [Fig.11-12] shows the presser foot fails to press the work material when the needle comes out of the fabric. The embroidery material is lifted up along with the needle, making a gap between the fabric and the needle plate.

  • Page 62: 11-5) Correct Position Of Needle

    11-5) CORRECT POSITION OF NEEDLE ① Make sure to check the position of the needle - it may change during machine delivery or leveling. First check if the needle is bent. Then turn the main shaft lever to set the shaft at around 130� . Position the needle at the lower dead stop and check if the needle is at the center of the needle hole on the plate.

  • Page 63: 11-6) Adjusting Half-Turn Film For Color Change

    11-6) ADJUSTING HALF-TURN FILM FOR COLOR CHANGE The machine will stop automatically if either of the needle position lamp or the needle set lamp is off on the color change box. In this case, adjust the half-turn film as below. �...

  • Page 64: 11-8) Jump Solenoid Adjustment

    11-8) JUMP SOLENOID ADJUSTMENT Adjust the position of the jump motor if you have to replace it or if you find errors in jump. 1) Adjusting the standby position (assembling solenoid and bracket) ① Unfasten the solenoid nut with the jump solenoid adjusting spanner (included in the SWF accessory kit).

  • Page 65: 11-9) Adjusting Drive Belt Tension

    11-9) ADJUSTING DRIVE BELT TENSION 11-9-1) X, Y Timing Belt 1) X, Y Timing Belt ① Push the frame plate to X or Y axis as shown in [Fig.11-19] and press the middle of the belt span to check the tension. ②...

  • Page 66: 11-10) Adjusting X, Y Scope Limits

    11-10) ADJUSTING X, Y SCOPE LIMITS 1) Adjusting X scope limit ① Manually move the frame to a point, where the Center of the needle right end of the frame clip is 45.5mm from the hole on #1 bed center of the needle hole on the #1 bed (see [Fig.11-22]) [Fig.11-22] ②...
  • Page 67 2) Adjusting Y scope limit ① Manually move the frame so the frame location pointer is at the frame origin indicated on the table (see [Fig.11-22]). Distance between the first needle of the head #1 and the rear end clip of the frame (Y-axis) should be around 16.5mm.
  • Page 68 4) Adjusting X scope limit when using odd or even number heads (SWF/D-(WB) SERIES) ① X scope will double if you set the needle bar stop clutch function for the even number heads (Note: X scope of the SWF/D-(WB) Series will be expanded to 480mm if even/odd number heads are used, whereas the scope will be 240mm when using all heads).

  • Page 69: Troubleshooting

    CHAPTER TROUBLE SHOOTING DANGER CAUTION Inspect/repair the machine by the guideline when in machine failures. Error Type Cause Inspection & Repair Reference ① Loose belt tension / belt �Check Operation failure Adjust belt tension / change belt ① main driver belt damage ②...
  • Page 70 Error Type Cause Inspection & Repair Reference Bad Color ① Incorrect position of needle Refer to user’ s manual Set main shaft angle back Change stop at 100� , if you manually moved it for cleaning, inspection or repair. ② Failure to detect signal for Run manual color change and See11-6 (p.11-8) needle position or 1 rotation...
  • Page 71 Error Type Cause Inspection & Repair Reference Poor detection ① Failure of thread detecting Disassemble the roller and clean of upper thread roller the roller and bush bearing. ② Poor connection & quality Check board connection and of tension adjusting board change the circuit board Bad jump ①...
  • Page 72 Error Type Cause Inspection & Repair Reference Thread breaks ① Stitch is too small/dense for Re-punch design tape Check design thread ② Frequent thread break in �Re-punch after checking Refer to LCD Monitor the same spot design Manual �Correct the stitches on operation box ③...
  • Page 73 Error Type Cause Inspection & Repair Reference ⑦ Bad thread (weak, uneven Change to good quality thread ※Selecting thread thickness, poorly twisted, Select soft, tight, and old) stable thread with even thickness and left-twist ⑧ Right-twisted thread Change to left-twisted thread �Z-twist: left �S-twist: right ※Left-twist prevents...
  • Page 74 Error Type Cause Inspection & Repair Reference ⑫ Dent on thread path on Remove dent or change the Check rotary hook hook and bobbin case case ⑬ Narrow space between Adjust space ※Set the space at 0.5- hook holder and groove for 0.7mm for smooth hook holder (on hook) feeding of upper thread...
  • Page 75 Error Type Cause Inspection & Repair Reference Skipped ① Bent needle Stitches ② Inadequate needle size for Change needle See 5-13-2 (p.5-18) thread ③ Incorrect installation of Adjust installation needle ④ Poor timing of needle and Adjust timing hook ⑤ Large gap between needle Adjust lower dead stop See 11-8 (p.11-9) groove and hook point...
  • Page 76 Error Type Cause Inspection & Repair Reference Poor stitch ① Weak upper thread tension Adjust upper thread tension See 5-7-2 (p.5-10) tension ② Uneven upper thread Clean main and sub tension tension due to foreign adjusters in the thread tension substances adjusting plate ③...
  • Page 77 Error Type Cause Inspection & Repair Reference Puckering ① Excessive thread tension Adjust tension See 5-7 (p.5-9) See 5-8 (p.5-12) ② Excessive pressure of Change presser foot spring presser foot ③ Needle failure - Change needle worn out/damaged needle needle is too large for thread ④...
  • Page 78 Error Type Cause Inspection & Repair Reference Trimmer return ① Poor connection of sensor Check connection failure ② Bad circuit board Change circuit board ③ Bad sensor and sensor �change sensor �clean around the sensor position. Dirty area around the �adjust location of the sensor See 11-1-4 (p.11-3) sensor.
  • Page 79 Error Type Cause Inspection & Repair Reference ① Lower thread is too short �adjust or change bobbin case Too short lower thread �doesn’ t unwind smoothly spring cannot make stitches right �clean/check for dent in thread after trimming guide on the bobbin case �too weak or too elastic Change lower thread Short upper...
  • Page 80 Error Type Cause Inspection & Repair Reference Failure of upper ① Bad fuse for upper thread Change front fuse in controller Check fuse spec thread holder holder motor and bad box or check connection = 250V 2A motor connection. ② Poor connection Change joint board Failure to hold ①...

  • Page 81: Chapter 13 Greasing

    CHAPTER GREASING 13-1) WHERE AND HOW TO GREASE (GROOVE ON X, Y CAM ROLLER GUIDE PLATE) Grease in the groove on the cam roller guide plate. 1) Cam Roller Guide Y-axis cam roller guide Table X-axis cam roller guide Stainless cover Frame Stainless cover [Fig.13-1]...

  • Page 82: 13-3) Greasing Lm Guide Rail On Head

    Timing belt Timing belt Where to grease Where to grease 2 sides of the 2 sides of the LM guide rail LM guide rail X axis Y axis Timing belt Timing belt Where to grease Where to grease [Fig.13-2] 13-3) GREASING LM GUIDE RAIL ON HEAD (FOR ALL SPECIFICATIONS) ①...

  • Page 83: 13-4) Greasing Cycle

    13-4) GREASING CYCLE Grease the LM guide rail once every 30 days. 13-5) GREASE SPECIFICATION Use a lithium grease (JIS No.2) Albania No.2. 13-6) PRECAUTIONS Do NOT grease the needle bar and around the hook. 13-3...

  • Page 84: Chapter 14 Block Diagram

    CHAPTER BLOCK DIAGRAM 14-1...

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