ELNA eXpressive 970 Service Manual
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ELNA eXpressive 970 Service Manual

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SERVICE MANUAL
MODEL: eXpressive 970

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Summary of Contents for ELNA eXpressive 970

  • Page 1 SERVICE MANUAL MODEL: eXpressive 970...

  • Page 2: Table Of Contents

    CONTENTS Replacing the Spool Stand ................... Replacing the Tension Unit Cover................. Replacing the Static head cover (Right) ............... To Replace Right Cover and Left Cover ............... Replacing the Base Cover and Bed Cover ..............Checking the Thread Paths (1) ..................Checking the Thread Paths (2) ..................
  • Page 3 CONTENTS Replacing the Jump Solenoid ..................Adjusting a Play in the Moving Head ................Replacing the Moving Head (1) .................. Replacing the Moving Head (2) .................. Adjusting the Needle Drop Position (Back or Forth) ..........Adjusting the Needle Height ..................Replacing the Needle Bar, Needle Spring and Cushion ..........
  • Page 4 CONTENTS Adjusting the Dynamic Cutter Blade ................Adjusting the Bobbin Thread Holder ................Adjusting the Thread Keeper ..................Adjusting the X-carriage Belt Tension ................. Replacing the X-carriage Belt ..................Adjusting the Y-carriage Belt Tension ................Replacing the Y-carriage Belt..................Adjusting the Timing Belt Tnsion ................Replacing the Timing Belt ...................

  • Page 5: Replacing The Spool Stand

    Replacing the Spool Stand Setscrews To remove: 1. Remove the setscrews and spool stand. To attach: 2. Attach the spool stand and tighten the setscrews. Spool stand Replacing the Tension Unit Cover Tension unit cover To remove: Setscrews 1. Remove the setscrews and tension unit cover. To attach: 2.

  • Page 6: Replacing The Static Head Cover (Right)

    Replacing the Static Head Cover (Right) Caps Setscrews (A) To remove: 1. Loosen the RCS mounting arm knob and remove it. 2. Remove caps, and two setscrews (A). Remove the static head cover (right). 3. Disconnect the LED lamp connector and K-board connector.

  • Page 7: To Replace Right Cover And Left Cover

    To Replace Right Cover and Left Cover Upper hook 1 Upper hook 2 Right Cover To remove: 1. Remove head cover (right). Unhook the right cover from the right hook. • To remove the head cover, Unhook the cover from upper hook 1, upper hook 2 and the hook on handwheel side.

  • Page 8: Replacing The Base Cover And Bed Cover

    Replacing the Base Cover and Bed Cover Setscrews (A) Base Cover To remove: 1. Remove the six setscrews (A). 2. Lift the back of the machine and remove it from the base cover. To attach: 3. Attach the machine into the base cover. 4.

  • Page 9: Checking The Thread Paths (1)

    Checking the Thread Paths (1) To avoid seam puckering, skipped stitches or thread breaking, keep the thread paths in the best condition. 1. Tension control, detecting roller Detecting rollers should spin smoothly. Tension controls and detecting rollers should be free of lint or dust. Detecting roller 2.

  • Page 10: Checking The Thread Paths (2)

    Checking the Thread Paths (2) Upper side 6. Needle plate There should be burrs or scratches. Lower side 7. Presser foot There should be no burrs or scratches, especially inside of the presser foot hole. There should be no warp in the presser foot.

  • Page 11: Replacing The Needle

    Replacing the Needle Needle clamp screw To remove: 1. Loosen the needle clamp screw. 2. Remove the needle. Needle To attach: 3. Insert the needle into the needle clamp with the long groove facing you. Push the needle up as far as it will 4.

  • Page 12: Needle And Thread Reference Table

    Needle and Thread Reference Table Use DBxK5Q1NY needles and select an appropriate size of needle for threads and fabrics to be sewn. An inappropriate size of needle may cause skip stitches, thread breakage or loose seam. Please refer to the table below and select the suitable needle size.

  • Page 13: Adjusting The Bobbin Thread Tension

    Adjusting the Bobbin Thread Tension * Use cotton thread size 120. Rear view Guide path 1. Guide the thread to the left to pass it into the guide path as shown. Thread Side view Front hole Adjusting screw 2. Pulling the thread from the front hole in the direction of arrow, measure the thread tension with a tension meter.

  • Page 14: Checking The Lowest Position Of The Needle

    Checking the Lowest Position of the Needle 1. Remove the spool stand, static head right cover and left cover. 2. Turn the handwheel to set the index disk at 270°. 3. Push the needle bar down to engage the needle bar clutch.

  • Page 15: Replacing The Needle Bar Rest

    Replacing the Needle Bar Rest To remove: 1. Remove spool stand, head cover (right), right cover and left cover. Connecter 2. Disconnect the thread catcher unit connector. Remove the two setscrews (A) and setscrew (B). Re- move the thread catcher unit. Setscrews (A) Setscrew (B) 3.

  • Page 16: Replacing The Take-Up Lever Cam Roller

    Replacing the Take-up Lever Cam Roller Setscrews Drive cover To remove: 1. Remove spool stand, head cover (right), right cover, left cover and thread tension panel. 2. Remove the three setscrews and drive cover. Thread take-up lever spring 3. Remove the thread take-up lever spring with pliers. Setscrew 4.

  • Page 17: Adjusting The Take Up Lever Timing

    Adjusting the Take-up Lever Timing To remove: 1. Remove spool stand, head cover (right), right cover and left cover. 2. Turn the handwheel to set the index disk at 6º. 3. Insert the positioning pin from the left side of the arm. The positioning pin goes into the pin groove of take-up lever cam if the timing is correctly adjusted.

  • Page 18: Replacing The Presser Foot Cam

    Replacing the Presser Foot Cam (1) *The presser foot cam shall be replaced as the crank unit. Setscrew A Left face plate 1 Remove the spool stand, head set right cover, right cover, left cover, moving head, thread catcher (unit) and needle bar rest.
  • Page 19 Replacing the Presser Foot Cam (2) Setscrew C 5 Loosen the setscrews C (2 pcs.). Crank (unit) 6 Remove the setscrew B. Pull the crank out to the front to remove it. Setscrew B...
  • Page 20 Replacing the Presser Foot Cam (3) 7 Apply the grease to the groove of the presser foot cam. * Recommended grease: MOLYKOTE (R) EM-30L. 8 Reverse the procedure to reinstall the parts. Do not attach the covers yet. 9 Check the lowest position of the needle (refer to page 13 of service manual).

  • Page 21: Replacing And Adjusting The Presser Foot (1)

    Replacing and Adjusting the Presser Foot (1) 1. Remove the lower thread guide plate unit and thread catcher panel. 2. Loosen the needle clamp screw and the setscrew. Remove the needle, needle clamp and two needle clamp cushions. Needle cramp cushion NOTE: Needle clamp...

  • Page 22: Replacing And Adjusting The Presser Foot (2)

    Replacing and Adjusting the Presser Foot (2) 7. Turn the handwheel to set the index disk at 0º (L). 8. Insert the 1.2 mm thick gauge between the needle plate and the presser foot. 9. Tighten the setscrew. Setscrew 10. Turn the handwheel to reset the index disk at 270º. 11.

  • Page 23: Replacing The Presser Foot Return Spring And Washer

    Replacing the Presser Foot Return Spring and Washer Step 1: Open the Needle Change Adjusting Window of the Factory Adjusting Mode. Select needle bar No. 1. Setscrew (A) Setscrew (A) Step 2: Removing the Needle Bar Remove the tension unit cover, lower thread guide plate and thread catcher panel (head cover).
  • Page 24 Needle bar holder Presser foot screw Loosen the needle bar holder screw. holder Pull the needle bar up until the bottom end of the needle bar reaches the bottom end of the presser foot holder. Note: Do not pull the needle bar out of the frame. Presser foot Replace the white plastic washer with the metal return spring...
  • Page 25 Step 3: Adjusting the Height of the Needle Bar and Presser Foot Needle rest (view from the side 12 Remove the bobbin case. of the moving head) 13 Hold the needle bar holder and push the needle bar down until it clicks. 14 Lower the needle bar to the lowest position by turning the hand wheel.

  • Page 26: Replacing The Thread Catcher

    Replacing the Thread Catcher To remove: 1. Remove spool stand, head cover (right), right cover, left cover, moving head and horizontal moving unit. 2. Disconnect the thread catcher connector. Remove the two setscrews (A), setscrew (B) and the thread catcher. Connector To attach: 3.

  • Page 27: Replacing The Thread Catcher Hook

    Replacing the Thread Catcher Hook To remove: 1. Remove the thread catcher unit (see page 25). 2. Loosen the six setscrews and remove the thread catcher guide. 3. Remove the thread catcher hook screw. Remove the thread catcher hook. To attach: 4.

  • Page 28: Replacing The Jump Solenoid

    Replacing the Jump Solenoid 1. Remove the head cover (right). Setscrews 2. Disconnect the connector. Remove the three setscrews and jump solenoid. Connector Slope cam 3. The slope cam should slide on the slope cam guide smoothly. Clean the solenoid if there is any lint or dust on it.

  • Page 29: Adjusting A Play In The Moving Head

    Adjusting a Play in the Moving Head 1. Remove head cover (right). 2. Check the play in the direction of the arrows. Needle drop adjusting rail If there is a detectable play, loosen the setscrew and tighten it while pressing the adjusting roller against the needle drop adjusting rail.

  • Page 30: Replacing The Moving Head (1)

    Replacing the Moving Head (1) To remove: 1. Remove the spool stand, head cover (right), right cover Cord clamp Setscrew and left cover. Connector Connector 2. Disconnect the connectors. Remove the setscrew of the cord clamp. 3. Remove either the left or right side of stopper screw on Connector Connector the rail shaft.

  • Page 31: Replacing The Moving Head (2)

    Replacing the Moving Head (2) 6. Turn the handwheel to set the index disk at 270º. 7. Turn the idler gear to set the moving head to the needle bar No. 3. Push the needle bar No. 3 down to engage the needle bar clutch.

  • Page 32: Adjusting The Needle Drop Position (Back Or Forth)

    Adjusting the Needle Drop Position (Back or Forth) 1. Set the moving head to needle bar No. 3 (see pages 33 and 46 of the instruction book). Push the needle bar No. 3 down to engage the needle bar clutch. Setscrews 2.

  • Page 33: Adjusting The Needle Height

    Adjusting the Needle Height 1. Remove the lower thread guide plate and thread catcher panel. 2. Remove the bobbin case. 3. Push the needle bar down to engage the needle bar clutch. 4. Turn the handwheel to set the index disk at 5º. 5.

  • Page 34: Replacing The Needle Bar, Needle Spring And Cushion

    Replacing the Needle Bar, Needle Spring and Cushion 1. Remove the presser foot (see pages 20 and 21). 2. Loosen the needle bar holder screw. Needle bar Needle bar spring 3. Pull the needle bar up and out of the frame. To remove the parts on the needle bar, pull the needle bar as far as the desired part can be removed.

  • Page 35: Replacing The Rotation Stopper Plate

    Replacing the Rotation Stopper Plate To remove: 1. Remove moving head (see pages 22 and 23). Setscrews 2. Remove the six setscrews and rotation stopper plate. To attach: 3. Attach the rotation stopper plate with the six setscrews. The setscrews should be positioned at the center of each holes when tightening each setscrews.

  • Page 36: Replacing The Thread Take-Up Lever

    Replacing the Thread Take-up Lever 1. Remove moving head (see pages 29 and 30). Thread take-up lever shaft Setscrew 2. Remove the E-ring. 3. Loosen the setscrew on the thread take-up lever shaft. 4. Pull the thread take-up lever shaft out in the direction of the arrow.

  • Page 37: Adjusting The Check Spring Tension

    Adjusting the Check Spring Tension Check spring tension is not necessary to adjust under normal conditions. However, you need to adjust the tension of the check spring when it is replaced. Setscrew (C) Setscrew 1. Remove the two setscrews (A) and lower thread guide plate.

  • Page 38: Adjusting The Check Spring Stroke

    Adjusting the Check Spring Stroke Check spring stroke is not necessary to adjust under normal conditions. However, you need to adjust the stroke of the check spring when it is replaced. 1. Loosen the setscrew. Move the adjuster up or down so the distance between the top of the check spring and the bottom side of the thread guide pin is 7 mm.

  • Page 39: Adjusting The Thread Catcher Holder

    Adjusting the Thread Catcher Holder 1. Remove the right cover of the stationary head (see page 5). Setscrews (A) Rod shaft 2. Remove the thread catcher panel and lower thread guide plate (see pages 25 and 26). 3. Loosen the four setscrews (A). 4.

  • Page 40: Replacing The Thread Catcher Loop Tape

    Replacing the Thread Catcher Loop Tape 1. Remove the right cover of the stationary head (see page 5). 2. Remove the thread catcher panel and lower thread Setscrews (A) guide plate (see pages 25 and 26). 3. Remove the four setscrews (A) and remove the thread catcher holder unit.

  • Page 41: Replacing The Lateral Moving Unit

    Replacing the Lateral Moving Unit To remove: 1. Remove the spool stand, right cover and left cover Setscrews (A) (see pages 4 and 5). Drive cover 2. Remove the tension unit cover (see page 4). 3. Remove the three setscrews (A) and remove the driver cover.

  • Page 42: Adjust The Hook Timing

    Adjusting the Hook Timing 1. Remove the setscrews and needle plate. Setscrews 2. Loosen the three setscrews on the hook. 3. Select No. 3 needle bar in the Ready to Sew mode (see the instruction book) and push the needle bar down.

  • Page 43: Adjusting The Position Of The Hook Stopper

    Adjusting the Position of the Hook Stopper 1. Loosen the setscrew to move the hook stopper. 2. Move the hook stopper to align the center with the needle and make a 0.6 – 0.8 mm clearance between the hook. Setscrew Tighten the setscrew securely.

  • Page 44: Replacing The Thread Cutter Driving Roller

    Replacing the Thread Cutter Driving Roller 1. Remove the spool stand and right cover (see pages 4 and 5). 2. Loosen the setscrew and remove the pivot pin. Remove the lever unit from the frame. Pivot pin Setscrew 3. Loosen the setscrew and remove the roller shaft. Replace the thread cutter driving roller.

  • Page 45: Replacing The Dynamic Cutter Blade

    Replacing the Dynamic Cutter Blade 1. Remove the setscrews and needle plate. Setscrews 2. Turn the power switch on while pressing the Start/ Stop button and Thread cutter button at the same time to open the Factory Adjusting window. Press the Phase key to open the Phase Sensor adjusting window and press the All Int key.

  • Page 46: Replacing The Static Cutter Blade

    Replacing the Static Cutter Blade 1. Remove the setscrews and needle plate. Setscrews 2. Press Divide key to move the dynamic cutter blade forward. 3. Remove the two setscrews and replace the static cutter blade. 4. Attach the static cutter blade and tighten the set screws while pressing the static cutter blade in the direction of the arrow.

  • Page 47: Adjusting The Static Cutter Blade

    Adjusting the Static Cutter Blade Setscrew 1. Remove the setscrews and needle plate. 2. Press Init key to move the dynamic cutter blade to the home position. 3. Check if there is no play in the cutter drive shaft and eliminate a play if any.

  • Page 48: Adjusting The Dynamic Cutter Blade

    Adjusting the Dynamic Cutter Blade Setscrews 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Remove the two setscrews and needle plate. 3. Press Divide key to move the dynamic cutter blade to the home position.

  • Page 49: Adjusting The Bobbin Thread Holder

    Adjusting the Bobbin Thread Holder 1. Remove the setscrews and needle plate. Setscrews 2. Place the bobbin thread between the dynamic cutter blade and bobbin thread holder. Close the dynamic cutter blade to clamp the bobbin thread. 3. Loosen the nut and turn the adjusting screw to adjust the clamping pressure.

  • Page 50: Adjusting The Thread Keeper

    Adjusting the Thread Keeper Gauge bobbin 1. Insert the gauge bobbin (a 1.6 mm thick spacer stuck on it) into the bobbin case and insert the bobbin case into the hook. 2. Loosen the two setscrews (A) and insert a 2 mm thick gauge between the frame of the solenoid and washer on the plunger.

  • Page 51: Adjusting The X-Carriage Belt Tension

    Adjusting the X-carriage Belt Tension 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Loosen the two setscrews (A) and remove the X-carriage cover. 3. Shift the hoop supporter to the extreme left end. Set the push-pull gauge at the right side of the machine frame and push the X-carriage timing belt.

  • Page 52: Replacing The X-Carriage Belt

    Replacing the X-carriage Belt 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Loosen the two setscrews (A) and remove the X-carriage cover. 3. Shift the hoop supporter to the extreme left end. Remove the two setscrews (C) and the X-belt holder.

  • Page 53: Adjusting The Y-Carriage Belt Tension

    Adjusting the Y-carriage Belt Tension 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Shift the X-carriage to the extreme front end. Push-pull gauge 3. Shift the X-carriage to the extreme front end. Set the push-pull gauge in line with the front end of the base frame and push the Y-carriage timing belt.

  • Page 54: Replacing The Y-Carriage Belt

    Replacing the Y-carriage Belt 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Remove the two setscrews (B) and the Y-belt holder. Setscrews (B) 3. Loosen the two setscrews (A) and shift the Y-belt pulley in the direction of the arrow.

  • Page 55: Adjusting The Timing Belt Tnsion

    Adjusting the Timing Belt Tension Push-pull gauge Timing belt 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Place a scale on the DC motor. Set the push-pull gauge in line with the scale as illustrated and push the timing belt.

  • Page 56: Replacing The Timing Belt

    Replacing the Timing Belt 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). Setscrews (A) Pointer 2. Remove the two setscrews (A) and the pointer. 3. Remove the three setscrews (B) and CPU board. 4.

  • Page 57: Adjusting The Motor Belt Tension

    Adjusting the Motor Belt Tension 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Place a scale under the stud bolt. Set the push-pull gauge in line with the scale as illustrated and push Motor belt the timing belt.

  • Page 58: Replacing The Motor Belt

    Replacing the Motor Belt 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Remove the two setscrews (A) and the pointer. Pointer Setscrews (A) 3. Remove the three setscrews (B) and DC motor. 4.

  • Page 59: Replacing The Dc Motor

    Replacing the DC Motor 1. Remove the spool stand, static head right cover and left cover (see pages 4 – 6). 2. Disconnect the motor connector. Remove the three DC motor setscrews (A) and DC motor. 3. Attach the DC motor and tighten the three setscrews (A) slightly.

  • Page 60: To Reset Motor Drive Time

    To Reset Motor Drive Time A warning message will appear when the motor drive time has exceeded 1,000 hours. The warning will be displayed until the motor is Replace the DC motor replaced and the motor drive time clock reset. (770610007) Replacing the DC Motor DC motor...

  • Page 61: Adjusting The Needle Upper Shaft Timing

    Adjusting the Upper Shaft Timing 1. Remove the spool stand and right cover (see pages 4 and 6). 2. Open the factory adjusting menu window and press the Phase key to open the Phase Sensor adjusting window. 3. Turn the handwheel clockwise. The indication next to Bottom dead pt.

  • Page 62: Adjusting The Moving Head Stop Position

    Adjusting the Moving Head Stop Position 1. Remove the spool stand, right cover, left cover and tension control panel (see pages 4 – 6). 2. Open the factory adjusting menu window and press the Needle key to open the Needle Change adjusting window.

  • Page 63: Adjusting The Needle Stop Position

    Adjusting the Needle Stop Position 1. Remove the spool stand, right cover, left cover and tension control panel (see pages 4 – 6). 2. Turn the lateral movement idler gear to select needle bar No. 1. 3. Open the factory adjusting menu window and press the Needle key to open the Needle Change adjusting window.

  • Page 64: Adjusting The Carriage Home Position

    Adjusting the Carriage Home Position 1. Remove the spool stand, right cover, left cover, base cover and X-carriage cover (see pages 4 – 7). 2. Attach the Hoop M1 (MB Hoop 240 X 200) to the hoop supporter. Front 3. Open the factory adjusting menu window and press the X/Y Motor key to open the X/Y Motor adjusting window.

  • Page 65: Securing The Cables In The Moving Head (Upper Part)

    Securing the Cables in the Moving Head (Upper Part) Nylon clip Secure the cables with the Nylon clip and cable guides to prevent the cables from interfering with parts in the moving head. Cable guides Left LED cables Right LED cables and other cables Setscrew Attaching the cable guide (black)

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