Janome HD 3000 Servicing Manual
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Janome HD 3000 Servicing Manual

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SERVICING MANUAL
HD 3000

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  • Page 1 SERVICING MANUAL HD 3000...

  • Page 2: Table Of Contents

    CONTENTS REMOVAL AND ATTACHMENT OF EXTERNAL PARTS ............2-5 FACE PLATE (UNIT) AND TOP COVER (UNIT) ..............2 BELT COVER ........................3 BASE AND BED COVER (UNIT) ..................4 FRONT PANEL (UNIT) ......................5 ADJUSTMENT PART/REPLACEMENT ................6 -27 CORRECTION OF STAGGERED STRAIGHT STITCH ............6 ADJUSTMENT OF TIMING OF LATERAL NEEDLE SWING ..........

  • Page 3: Removal And Attachment Of External Parts

    Face plate (unit) To remove: (1) Remove the two set screws (A), and detach the face plate (unit). To attach: (2) Temporarily tighten the two set screws (A) to set the face plate (unit). (3) Close the face plate, level it with the arm, thread tension dial (unit) and top cover, and then completely tighten the two set screws (A).

  • Page 4: Belt Cover

    Belt cover To remove: (1) Pull out the pattern selector dial. (2) Remove the set screw (A) and loosen the set screws (B). (3) Open the top cover and separate the rib of the belt cover from the front panel. After that, pull up the belt cover to disengage its convex part from the carrying handle supporter plate and detach the belt cover.

  • Page 5: Base And Bed Cover (Unit)

    Base To remove: (1) Loosen and remove the three set screws (A), (B), (C) and then two set screws (D). (2) Detach the base while tilting it. To attach: (3) Insert the base while tilting it, and tighten the two set screws (D) and then three set screws (A), (B) and (C).

  • Page 6: Front Panel (Unit)

    Front panel (unit) To remove: (1) Detach the top cover (unit) and belt cover. (2) Turn the pattern selector dial toward you to select BH. (3) Remove the set screws (A) and (B) ,and loosen the set screws (C), (D) and (E). (4) While holding the right side of the front panel and lightly pushing down section F, draw the front panel (unit) toward you for removal.

  • Page 7: Adjustment Part/Replacement

    CORRECTION OF STAGGERED STRAIGHT STITCH If the needle bar moves laterally when the balance wheel is turned toward you with the pattern selector dial set at “ “and the zigzag width adjusted to “ 0 “ then make adjustment in the following procedure: (1) Remove the top cover (unit), set the pattern selector dial at “...

  • Page 8: Adjustment Of Timing Of Lateral Needle Swing

    ADJUSTMENT OF TIMING OF LATERAL NEEDLE SWING If the needle bar moves sidewise while the needle is in the fabric in zigzag stitching, then make adjustment in the procedure given below. The needle should start swinging from a position 2 to 3 mm above the top surface of the needle plate.

  • Page 9: Correction Of Needle Position Misalignment

    CORRECTION OF NEEDLE POSITION MISALIGNMENT Make adjustment in the procedure given below if the needle bar moves laterally upon change of the zigzag width between “0” and “6.5” (maximum width) with the needle brought to the center after the pattern selector dial is set at “ “ and the maximum zigzag width is selected. (After the adjustment, check if the straight stitch “M”...

  • Page 10: Adjustment Of Needle Drop Position In Needle Plate Hole

    ADJUSTMENT OF NEEDLE DROP POSITION IN NEEDLE PLATE HOLE When the pattern selector dial is set at “ “ (straight stitch), the needle should be positioned at the center of the needle plate hole. When the pattern selector dial is set at “ “ and the maximum zigzag width is selected, the clearance between the needle and the edge of needle plate holder should be equal and 0.2 mm or more at the left and right needle drop positions.

  • Page 11: Adjustment Of Zigzag Stopper

    ADJUSTMENT OF ZIGZAG STOPPER If the needle tip interferes with the needle plate when the needle swings to the right at the maximum zigzag width, then make adjustment in the following procedure. (When the needle drop position in the needle plate hole is deviated toward the right on the whole, refer to “ADJUSTMENT OF NEEDLE DROP POSITION IN NEEDLE PLATE HOLE”...

  • Page 12: Adjustment Of Presser Bar Direction And Height

    ADJUSTMENT OF PRESSER BAR DIRECTION AND HEIGHT The side of the zigzag foot is parallel with the openings for the feed dog in the needle plate when the presser foot lifter is lowered. There should be a clearance of about 6 mm between the presser foot and the needle plate when the presser foot lifter is raised.

  • Page 13: Adjustment Of Clearance Between Needle And Rotary Hook

    ADJUSTMENT OF CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK The clearance between the needle and the rotary hook tip should be -0.10 to +0.05 mm. (1) Remove the needle plate and bobbin holder, and then attach the master needle. (2) Set the pattern selector dial at “ “ and adjust the zigzag width to “0”. (3) Remove the bed cover (unit).

  • Page 14: Adjustment Of Backlashes Between Hook Drive Shaft

    ADJUSTMENT OF BACKLASH BETWEEN HOOK DRIVE SHAFT AND LOWER SHAFT GEARS Engagement of the gears should be smooth and the backlash should be 0.8 mm or less when the rotary hook tip is within the width of the feed dog. After adjustment of the clearance between the needle and the rotary hook, be sure to check and adjust the backlash.

  • Page 15: Adjustment Of Needle Bar Height

    ADJUSTMENT OF NEEDLE BAR HEIGHT When the tip of the rotary hook exactly meets the right side of the needle in ascending travel of the needle bar from its lowest position at the left needle drop position with the pattern selector dial set at “...

  • Page 16: Adjustment Of Hook Timing

    ADJUSTMENT OF HOOK TIMING With the needle bar swung to the left at the maximum zigzag width, the amount of ascending travel of the needle bar from its lower position to the position where the tip of the rotary hook exactly meets the right side of the needle should be 3.15 to 3.45 mm.

  • Page 17: Adjustment Of Feed Dog Height

    ADJUSTMENT OF FEED DOG HEIGHT When the presser foot is lowered with the pressure dial set at “ 3 “ the highest position of the feed dog should be 0.75 to 0.85 mm above the top surface of the needle plate. Set the pressure dial at “...

  • Page 18: Adjustment Of Stretch Stitch Feed Balance

    ADJUSTMENT OF STRETCH STITCH FEED BALANCE When a stretch stitch pattern is sewed with the 55 adjusting knob at a mark “ “ the pattern should be formed as shown in the figure below. If not (if there is no balance between forward feeding and backward feeding), then make adjustment in the following procedure.

  • Page 19: Adjustment Of Zero Feeding

    ADJUSTMENT OF ZERO FEEDING If the material is fed with the pattern selector dial set at “ “(straight stitch) and the stitch length adjusted to “0” then make adjustment in the following procedure. (1) Remove the belt cover, set the pattern selector dial at “ “ and adjust the stitch length to “0”. (2) Put a piece of paper between the presser foot and the feed dog, and lower the presser foot lifter.

  • Page 20: Adjustment Of Buttonhole Feed Balance

    ADJUSTMENT OF BUTTONHOLE FEED BALANCE If there is a difference in stitch density between the right and left rows of a buttonhole, then make adjustment in the procedure given below. The right row should have 9 to 12 stitches compared with 10 stitches on the left row. (1) Sew a buttonhole by use of the BH foot (R) and check the stitch density on the right and left rows.

  • Page 21: Adjustment Of Buttonhole Function

    ADJUSTMENT OF BUTTONHOLE FUNCTION If any of the following functional troubles occur in buttonhole stitching, make adjustment in the procedure given below. I. The buttonhole is extremely short or long. II. The sewed length is smaller or larger than the length set on the R foot. <Adjustment in case of I >...

  • Page 22: Replacement Of Bh Lever (Unit)

    REPLACEMENT OF BH LEVER (UNIT) For replacement of the BH lever with a new one, take the following procedure. To remove: (1) Remove the snap ring (E-3). (2) Pull out the BH lever (unit) from the shaft. To attach: (3) Pass the shaft through a new BH lever (unit) and fasten it with the snap ring. (Note) After the above replacement, check the BH function.

  • Page 23: Adjustment Of Needle Thread Tension

    ADJUSTMENT OF NEEDLE THREAD TENSION When the cotton thread size 50 is passed as shown in the figure below and pulled upward, the tension should be 85 to 115 g with the thread tension dial set at “3”. (1) Set the thread tension dial at “3” and pass the thread. (2) Open the face plate, and lower the pressure foot lifter.

  • Page 24: Replacement Of Thread Tension Dial (Unit)

    REPLACEMENT OF THREAD TENSION DIAL (UNIT) To remove: Remove the top cover (unit), lower the presser foot lifter, and open the face plate. Detach the front panel (unit). Lower the thread take-up lever, remove the set screws (A) and (B), and then detach the thread tension dial (unit).

  • Page 25: Adjustment Of Thread Tension Releasing Mechanism

    ADJUSTMENT OF THREAD TENSION RELEASING MECHANISM When the presser foot lifter is raised, the tension disc supporter should move about 1.0 mm so that the thread tension releasing mechanism works properly. (1) Remove the top cover (unit). (2) Lower the presser foot lifter, set the thread tension dial at “9” and then loosen the set screw. (3) While pushing the thread tension releasing plate (2) in direction (A), bring the thread tension releasing plate (1) into contact with the tension disc supporter.

  • Page 26: Adjustment Of Threader (1)

    ADJUSTMENT OF THREADER (1) If the threader pin (threader spring) interferes with the needle eye, then make adjustment in the following procedure. (1) Attach the blue tipped needle. (2) Turn the balance wheel until the needle comes to its highest position. (3) Pull down the threader to bring the positioning plate into contact with the roll pin of the needle bar.

  • Page 27: Adjustment Of Threader (2)

    ADJUSTMENT OF THREADER (2) If the hook of the threader does not catch the thread loop, then make adjustment in the following procedure. (1) Attach the blue tipped needle to the needle bar. (2) Thread the embroidery thread #50. (3) When the hook does not catch the thread loop, adjust the hook in the vertical direction and in the direction of clearance.

  • Page 28: Replacement Of Threader Pin

    REPLACEMENT OF THREADER PIN If the threader pin (threader spring) is deformed or damaged, then replace it with a new one in the following procedure. Pull down the threader 2 cm or so from its highest position. Hold the threader supporter in place. Pinch the knob section of the threader pin and pull it out.

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