Brother XM3700 Service Manual
  1. Manuals
  2. Brands
  3. Brother Manuals
  4. Sewing Machine
  5. XM3700
  6. Service manual

Brother XM3700 Service Manual

Home sewing machine
Hide thumbs Also See for XM3700:
Table of Contents

Advertisement

Quick Links

See also: Operating Manual , Quick Reference Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the XM3700 and is the answer not in the manual?

Questions and answers

Related Manuals for Brother XM3700

Summary of Contents for Brother XM3700

  • Page 4: Table Of Contents

    1. Outline of Mechanism ................1 - 1 Main mechanisms ....................1 - 2 Driveline ......................1 - 3 Positions of electronic components ..............1 - 6 Control system block diagram ................1 - 7 2. Basic of Disassembly/Assembly ............2 - 1 Disassembly Main frame and Covers ..................2 - 2 Removal of Accessory table ......................2 - 3 Removal of Face plate assy .......................2 - 3 Removal of Pattern selecting dial ......................2 - 3...
  • Page 5 Buttonhole and Pattern selecting mechanism ..........2 - 31 Attachment of Pattern selecting unit assy ..................2 - 32 Attachment of BH stopper assy .......................2 - 33 Attachment of BH connecting shaft ....................2 - 34 Attachment of BH adjusting plate ....................2 - 35 Feed control mechanism .................2 - 36 Attachment of Feed bracket assy .....................2 - 37 Attachment of Lever holder assy .....................2 - 38...
  • Page 6 Removal of Slide plate ......................3 - 9 Removal of NT lower thread cutter ..................3 - 10 Removal of Needle plate A .....................3 - 11 Removal of Stopper plate R/M ....................3 - 11 Removal of Inner rotary hook assy .....................3 - 11 Removal of Inner rotary hook plate assy ..................3 - 12 Removal of Base plate .........................3 - 12 Removal of Feed dog ........................3 - 12...
  • Page 7 Removal of Lock nut ........................3 - 39 Removal of Shaft bushing ......................3 - 40 Assembly Upper shaft, Needle bar and Presser foot unit ..........3 - 41 Assembly of Needle-presser module ....................3 - 42 Attachment of Shaft bushing .......................3 - 42 Attachment of Lock nut .......................3 - 42 Attachment of Thread release lever ....................3 - 43 Attachment of Presser bar ......................3 - 43...
  • Page 8 Attachment of Base plate ......................3 - 71 Attachment of Inner rotary hook plate assy ................3 - 71 Attachment of Inner rotary hook assy ..................3 - 72 Assembly/Attachment of Needle plate assy ................3 - 72 Attachment of Stopper plate R/M ...................3 - 72 Attachment of Needle plate A ....................3 - 73 Attachment of NT lower thread cutter ..................3 - 74 Attachment of Slide plate .......................3 - 74...
  • Page 9 Feed distance ....................4 - 30 Straight forward/Straight reverse stitch length ..........4 - 32 BH lever switch load ..................4 - 34 Left reverse stitch of buttonhole stitch length ..........4 - 35 BH stitch bar tack feed distance ..............4 - 37 BH sewing length .....................4 - 39 Bobbin winder ....................4 - 41 Needle threader ....................4 - 42 Lower thread tension ..................4 - 44...

  • Page 10: Outline Of Mechanism

    Outline of Mechanism Main mechanisms ............ 1 - 2 Driveline ..............1 - 3 Positions of electronic components......1 - 6 Control system block diagram........1 - 7 1 - 1...

  • Page 11: Main Mechanisms

    Outline of Mechanism Main mechanisms Bobbin winder mechanism Feed control mechanism Upper shaft mechanism Zigzag mechanism Needle threading mechanism Needle-presser mechanism Pattern selecting mechanism BH mechanism Thread guide mechanism Lower shaft mechanism Horizontal feed mechanism Front Side View Feed / Rotary hook mechanism Back Side View 1 - 2...

  • Page 12: Driveline

    Outline of Mechanism Driveline (A) Up and down movement of needle bar, movement of thread take-up lever and zigzag movement of needle bar mechanism Main motor Motor belt Timing pulley Thread take-up Needle bar crank Upper shaft Pulley counter weight Worm gear Needle bar crank Pattern cam...
  • Page 13 Outline of Mechanism Driveline (B) Movement of feed dog and rotary hook Main motor Motor belt Timing pulley Upper shaft Lower shaft gear Lower shaft Timing pulley D Timing belt Upper shaft Pulley pulley Feed adjusting Worm gear cam, SS cam F finger F finger frame Feed cam...
  • Page 14 Outline of Mechanism Driveline (C) Movement of automatic 1-step BH mechanism BHZ finger BH connecting BH change arm BH stopper BH cam shaft BH lever holder BHF finger BH lever BH foot BH stopper BHF finger BH change arm BHZ finger BH connecting shaft Z finger frame BH lever holder...

  • Page 15: Positions Of Electronic Components

    Outline of Mechanism Positions of electronic components Power SW 3pin socket Power supply PCB Sewing lamp (LED) Main motor 1 - 6...

  • Page 16: Control System Block Diagram

    Outline of Mechanism Control system block diagram In the 3pin socket Foot controller plug Main motor 3pin socket (3pin) Foot controller Power SW Power supply PCB Sewing lamp (LED) SEWING MACHINE 1 - 7...
  • Page 17 Basic of Disassembly/Assembly When repair and replace the part of the unit, refer to “CHAPTER 3: Application of Disassembly/Assembly”. Disassembly Main frame and Covers ......2 - 2 Main motor unit........... 2 - 6 Feed unit ............ 2 - 9 Needle threading mechanism....

  • Page 18: Main Frame And Covers

    Basic of Disassembly Main frame and Covers Main frame and Covers location diagram 2 - 2...

  • Page 19: Removal Of Accessory Table

    Basic of Disassembly Main frame and Covers Removal of Accessory table 1. Remove the accessory table 1. Removal of Face plate assy 1. Remove the screw 1, and then remove the face plate assy 1. → Refer to 3 - 3 of the Disassembly. Removal of Pattern selecting dial 1.

  • Page 20: Removal Of Front Cover Assy

    Basic of Disassembly Main frame and Covers Removal of Front cover assy 1. Remove the 2 screws 1, the screw 2 and the 2 screws 3. 2. Release the 3 hooks 1 to remove the front cover assy 2, and then disconnect the connector 3.

  • Page 21: Removal Of Rear Cover Assy

    Basic of Disassembly Main frame and Covers Removal of Rear cover assy 1. Pull down the presser foot lifter 1. 2. Remove the 3 screws 1, and then remove the rear cover assy 2. → Refer to 3 - 5 of the Disassembly. 2 - 5...

  • Page 22: Main Motor Unit

    Basic of Disassembly Main motor unit Main motor unit location diagram 220 to 240V 120V 2 - 6...

  • Page 23: Removal Of Motor 3P Supply Assy

    Basic of Disassembly Main motor unit Removal of Motor 3P supply assy 120V specification 1. Remove the timing belt 1 from the T pulley 2 and the motor T-pulley 3. 2. Remove the screw 1 and the 2 screws 2, and then remove the motor assy 4 of the motor 3P supply assy.

  • Page 24: Removal Of Lower Shaft Plate

    Basic of Disassembly Main motor unit 220 to 240V specification 1. Remove the timing belt 1 from the T pulley 2 and the motor T-pulley 3. 2. Remove the 2 screws 1, and then remove the motor assy 4 of the motor 3P supply assy.

  • Page 25: Feed Unit

    Feed unit Basic of Disassembly Feed unit location diagram (Metal Model) (Plastic Model) 2 - 9...

  • Page 26: Removal Of Tension Pulley Assy

    Basic of Disassembly Feed unit Removal of Tension pulley assy 1. Remove the screw 1, and then remove the tension pulley assy 1. Removal of Feed adjuster assy 1. Remove the retaining ring E4 1, and then remove the connecting rod D 2 from the shaft 3 of the feed connecting lever assy 4.

  • Page 27: Removal Of Feed Module

    Basic of Disassembly Feed unit Removal of Feed module 1. Remove the screw 1, and then remove the bushing presser 1. 2. Remove the screw 2 and the 2 screws 3, and then remove the feed module 2. → Refer to 3 - 9 of the Disassembly. 2 - 11...

  • Page 28: Needle Threading Mechanism

    Basic of Disassembly Needle threading mechanism Needle threading mechanism location diagram 2 - 12...

  • Page 29: Removal Of Thread Guard Assy

    Basic of Disassembly Needle threading mechanism Removal of Thread guard assy Type A 1. Remove the screw 1 and the screw 2, and then remove the reverse lever supporter 1 and the thread guard assy 2. → Refer to 3 - 20 of the Disassembly. Type B 1.

  • Page 30: Zigzag Mechanism

    Basic of Disassembly Zigzag mechanism Zigzag mechanism location diagram 2 - 14...

  • Page 31: Removal Of Z Dial Assy

    Basic of Disassembly Zigzag mechanism Removal of Z dial assy 1. Remove the retaining ring E2 1 from the shaft 2 of the zigzag connecting rod assy 3. 2. Remove the screw 1 and the screw 2, and then remove the Z dial assy →...

  • Page 32: Removal Of Zigzag Link Holder Assy

    Basic of Disassembly Zigzag mechanism Removal of Zigzag link holder assy 1. Remove the screw 1, and then remove the zigzag adjusting nut 1. 2. Remove the 2 screws 2, and then remove the zigzag link holder assy 2 from the pattern selecting unit assy 3. 2 - 16...

  • Page 33: Feed Control Mechanism

    Basic of Disassembly Feed control mechanism Feed control mechanism location diagram 2 - 17...

  • Page 34: Removal Of Reverse Sewing Lever A

    Basic of Disassembly Feed control mechanism Removal of Reverse sewing lever A Type A 1. Remove the reverse sewing button 1. 2. Remove the retaining ring E4 2 from the shaft of the lever holder sub assy 3. Remove the reverse sewing lever A 4. Type B 1.

  • Page 35: Removal Of Reverse Sewing Lever B Assy

    Basic of Disassembly Feed control mechanism Removal of Reverse sewing lever B assy 1. Remove the spring from the reverse sewing lever B assy 1 and the feed bracket sub assy 2. 2. Remove the reverse sewing lever B assy 1 from the arm bed. Removal of Lever holder assy 1.

  • Page 36: Removal Of Feed Bracket Assy

    Basic of Disassembly Feed control mechanism Removal of Feed bracket assy 1. Remove the 2 screws 1, and then remove the feed bracket support plate 2. Remove the screw 2, and then remove the feed bracket assy 2. *Key point •...

  • Page 37: Buttonhole And Pattern Selecting Mechanism

    Basic of Disassembly Buttonhole and Pattern selecting mechanism Buttonhole and Pattern selecting mechanism location diagram * There is a model without the retaining ring. 2 - 21...

  • Page 38: Removal Of Bh Adjusting Plate

    Basic of Disassembly Buttonhole and Pattern selecting mechanism Removal of BH adjusting plate 1. Remove the spring from the BH change arm 1 and the BH adjusting plate 2. 2. Remove the screw 1, and then remove the BH adjusting plate 2. 2 - 22...

  • Page 39: Removal Of Bh Connecting Shaft

    Basic of Disassembly Buttonhole and Pattern selecting mechanism Removal of BH connecting shaft 1. Remove the retaining ring E2.5 1 from the BH connecting shaft 2. *Key point • There is a model without the retaining ring. 2. Remove the screw 1, and then pull out the BH connecting shaft 2. 3.

  • Page 40: Removal Of Bh Stopper Assy

    Basic of Disassembly Buttonhole and Pattern selecting mechanism Removal of BH stopper assy 1. Remove the screw 1, and then remove the BH stopper assy 1. → Refer to 3 - 30 of the Disassembly. Removal of Pattern selecting unit assy 1.

  • Page 41: Upper Shaft, Needle Bar And Presser Foot Unit

    Basic of Disassembly Upper shaft, Needle bar and Presser foot unit Upper shaft, Needle bar and Presser foot unit location diagram 2 - 25...

  • Page 42: Removal Of Upper Shaft Assy

    Basic of Disassembly Upper shaft, Needle bar and Presser foot unit Removal of Upper shaft assy 1. Remove the screw 1. 2. Remove the 2 screws 2, and then remove the 2 bushing pressers 1. 3. Remove the upper shaft assy 2. 4.

  • Page 43: Removal Of Needle-Presser Module

    Basic of Disassembly Upper shaft, Needle bar and Presser foot unit Removal of Needle-presser module 1. Remove the screw 1. 2. Remove the 2 screws 2, and then remove the needle-presser module 1. → Refer to 3 - 32 of the Disassembly. 2 - 27...

  • Page 44: Upper Shaft, Needle Bar And Presser Foot Unit

    Basic of Assembly Upper shaft, Needle bar and Presser foot unit Upper shaft, Needle bar and Presser foot unit location diagram 2 - 28...

  • Page 45: Attachment Of Needle-Presser Module

    Basic of Assembly Upper shaft, Needle bar and Presser foot unit Attachment of Needle-presser module 1. Set the shaft 1 of the needle-presser module 2 to the 2 positioning grooves of the arm bed, and secure them with the 2 screws 1. 2.

  • Page 46: Attachment Of Upper Shaft Assy

    Basic of Assembly Upper shaft, Needle bar and Presser foot unit Attachment of Upper shaft assy 1. Pass the timing belt 1 to the upper shaft assy 2. 2. Set the thread take-up counter weight 3 to the needle bar crank rod assy 3.

  • Page 47: Buttonhole And Pattern Selecting Mechanism

    Basic of Assembly Buttonhole and Pattern selecting mechanism Buttonhole and Pattern selecting mechanism location diagram * There is a model without the retaining ring. 2 - 31...

  • Page 48: Attachment Of Pattern Selecting Unit Assy

    Basic of Assembly Buttonhole and Pattern selecting mechanism Attachment of Pattern selecting unit assy 1. Set the pattern selecting unit assy 1 to the arm bed, and then secure it with the screw 1 and the 2 screws 2. *Key point •...

  • Page 49: Attachment Of Bh Stopper Assy

    Basic of Assembly Buttonhole and Pattern selecting mechanism Attachment of BH stopper assy 1. Set the BH stopper assy 1 to the arm bed, and then secure it with the screw 1. *Key point • Check that align the positioning hole of the arm bed with the boss of the BH stopper assy 1.

  • Page 50: Attachment Of Bh Connecting Shaft

    Basic of Assembly Buttonhole and Pattern selecting mechanism Attachment of BH connecting shaft 1. Attach the retaining ring E2.5 1 to the BH connecting shaft 2. *Key point • There is a model without the retaining ring. 2. Insert the BH connecting shaft 2 into the washer plain M3.5 3, the BH lever holder 4, the base holder assy 5, the arm bed, the BH change arm 6 and the BH stopper holder assy 7, and then tighten the screw 1.

  • Page 51: Attachment Of Bh Adjusting Plate

    Basic of Assembly Buttonhole and Pattern selecting mechanism Attachment of BH adjusting plate 1. Set the BH adjusting plate 1 to the arm bed, and then tighten the screw 1 temporarily. *Key point • Fully tighten the screw 1 after performing "4-34 Adjustment: BH lever switch load".

  • Page 52: Feed Control Mechanism

    Basic of Assembly Feed control mechanism Feed control mechanism location diagram 2 - 36...

  • Page 53: Attachment Of Feed Bracket Assy

    Basic of Assembly Feed control mechanism Attachment of Feed bracket assy 1. Move the dial 1 of the feed bracket assy 2 to the position [4], and set the feed bracket assy 2 to the arm bed, and then tighten the screw 1 temporarily.

  • Page 54: Attachment Of Lever Holder Assy

    Basic of Assembly Feed control mechanism Attachment of Lever holder assy 1. Set the lever holder assy 1 to the arm bed, and then secure it with the screw 1 and the screw 2. *Key point • Check that there is the shaft 2 of the reverse sewing lever D assy 3 above the shaft 4 of the pattern selecting unit assy.

  • Page 55: Attachment Of Reverse Sewing Lever A

    Basic of Assembly Feed control mechanism Attachment of Reverse sewing lever A Type A 1. Set the reverse sewing lever A 1 to the shaft of the lever holder sub assy 2 while pushing down the reverse sewing lever B assy 3. *Key point •...

  • Page 56: Zigzag Mechanism

    Basic of Assembly Zigzag mechanism Zigzag mechanism location diagram 2 - 40...

  • Page 57: Attachment Of Zigzag Link Holder Assy

    Basic of Assembly Zigzag mechanism Attachment of Zigzag link holder assy 1. Set the zigzag link holder assy 1 to the pattern selecting unit assy 2, and then secure it with the screw 1 and the screw 2. *Key point •...

  • Page 58: Attachment Of Zigzag Connecting Rod Assy

    Basic of Assembly Zigzag mechanism Attachment of Zigzag connecting rod assy 1. Insert the shaft 1 of the zigzag connecting rod assy 2 into the positioning hole of the back side 3 of the zigzag link holder assy 4 as shown in the right figure.

  • Page 59: Attachment Of Z Dial Assy

    Basic of Assembly Zigzag mechanism Attachment of Z dial assy 1. Set the Z dial assy 1 to the arm bed, and then secure it with the screw 1 and the screw 2. 2. Tighten the screw 3. 3. Set the Z dial connecting rod 2 to the shaft of the zigzag connecting rod assy 3, and then attach the retaining ring E2 4.

  • Page 60: Needle Threading Mechanism

    Basic of Assembly Needle threading mechanism Needle threading mechanism location diagram 2 - 44...

  • Page 61: Attachment Of Thread Guard Assy

    Basic of Assembly Needle threading mechanism Attachment of Thread guard assy Type A 1. Set the thread guard assy 1 to the arm bed and the thread guard supporter assy 2, and then tighten the screw 1. 2. Set the reverse lever supporter 3 to the thread guard assy 1, and then secure them to the arm bed with the screw 2.

  • Page 62: Feed Unit

    Feed unit Basic of Assembly Feed unit location diagram (Metal Model) (Plastic Model) 2 - 46...

  • Page 63: Attachment Of Feed Module

    Basic of Assembly Feed unit Attachment of Feed module 1. Set the feed module 1 to the arm bed, and then secure it with the 2 screws 1 and the screw 2. *Key point • Check that engage the outer rotary shaft 2 with the notch part of the arm bed.

  • Page 64: Phase Matching Of Upper Shaft And Lower Shaft

    Basic of Assembly Feed unit Phase matching of Upper shaft and lower shaft 1. When set the groove 1 of the upper shaft pulley 2 frontward by rotating the pulley of the upper shaft assy 3, set the mark 4 of the outer rotary hook assy 5 frontward by rotating the lower shaft assy 6 and set the feed cam 7 with the larger end facing backward, and then tighten the 2 screws 1 of the timing pulley D 8.

  • Page 65: Attachment Of Feed Adjuster Assy

    Basic of Assembly Feed unit Attachment of Feed adjuster assy 1. Insert the groove 1 of the feed adjuster sub assy 2 to the shaft of the feed arm assy 3, and then set the feed adjusting shaft holder 4 to the arm bed with the screw 1 and the screw 2.

  • Page 66: Main Motor Unit

    Basic of Assembly Main motor unit Main motor unit location diagram 220 to 240V 120V 2 - 50...

  • Page 67: Attachment Of Lower Shaft Plate

    Basic of Assembly Main motor unit Attachment of Lower shaft plate 1. Set the lower shaft plate 1 to the arm bed with the 2 screws 1. Taptite, Bind S M4X10 Attachment of Motor 3P supply assy 120V specification 1. Set the 3P socket unit 1 of the motor 3P supply assy to the back side of the arm bed, and then secure it with the 2 screws 1.
  • Page 68 Basic of Assembly Main motor unit 220 to 240V specification 1. Set the 3P socket unit 1 of the motor 3P supply assy to the back side of the arm bed, and then secure it with the 2 screws 1. 2.

  • Page 69: Main Frame And Covers

    Basic of Assembly Main frame and Covers Main frame and Covers location diagram 2 - 53...

  • Page 70: Attachment Of Rear Cover Assy

    Basic of Assembly Main frame and Covers Attachment of Rear cover assy 1. Pull down the presser foot lifter 1. 2. Set the rear cover assy 2 to the arm bed, and then secure it with the 3 screws 1. →...

  • Page 71: Attachment Of Front Cover Assy

    Basic of Assembly Main frame and Covers Attachment of Front cover assy 1. Connect the connector 1 of the LED lamp supply assy to the motor 3P supply assy 2. 2. Set the front cover assy to the arm bed, and then secure it with the 2 screws 1, the screw 2 and the 2 screws 3.

  • Page 72: Attachment Of Pattern Selecting Dial

    Basic of Assembly Main frame and Covers Attachment of Pattern selecting dial 1. Attach the pattern selecting dial 1. Attachment of Face plate assy 1. Set the face plate assy 1 to the rear cover assy, and then secure it with the screw 1.

  • Page 73: Application Of Disassembly/Assembly

    Application of Disassembly/Assembly In this chapter, explains the disassembly and assembly of the each module. When fix and replace the each module, use this chapter. Disassembly Main frame and Covers ....3 - 2 Main motor unit.........3 - 6 Feed unit...........3 - 8 Needle threading mechanism..3 - 19 Zigzag mechanism ......3 - 24 Feed control mechanism ....3 - 26...

  • Page 74: Main Frame And Covers

    Application of Disassembly Main frame and Covers Main frame and Covers location diagram 3 - 2...

  • Page 75: Disassembly Of Face Plate Assy

    Application of Disassembly Main frame and Covers Disassembly of Face plate assy 1. Remove the screw 1, and then remove the face plate cutter holder 1 from the face plate assy. 2. Remove the NT lower thread cutter 2 from the face plate assy. 3 - 3...

  • Page 76: Disassembly Of Front Cover Assy

    Application of Disassembly Main frame and Covers Disassembly of Front cover assy 2-1 Removal of LED lamp supply assy 1. Remove the screw 1, and then remove the LED lamp supply assy 1. 2. Remove the 5 retaining rings, CS4 2. 2-2 Removal of Rubber cushion A 1.

  • Page 77: Disassembly Of Rear Cover Assy

    Application of Disassembly Main frame and Covers Disassembly of Rear cover assy 3-1 Removal of Spool pin 1. Remove the spool pin 1 while pulling the spool pin spring 2. 2. Remove the spool pin spring 2. 3-2 Removal of Bobbin presser 1.

  • Page 78: Main Motor Unit

    Application of Disassembly Main motor unit Main motor unit location diagram 220 to 240V 120V 3 - 6...

  • Page 79: Disassembly Of Motor 3P Supply Assy

    Application of Disassembly Main motor unit Disassembly of Motor 3P supply assy 120V specification 1. Remove the retaining ring E3 1, and then remove the frange 2 and the motor T-pulley 3. 220 to 240V specification 1. Remove the retaining ring E3 1, and then remove the frange 2 and the motor T-pulley 3.

  • Page 80: Feed Unit

    Feed unit Application of Disassembly Feed unit location diagram (Metal Model) (Plastic Model) 3 - 8...

  • Page 81: Disassembly Of Feed Adjuster Assy

    Application of Disassembly Feed unit Disassembly of Feed adjuster assy 1. Remove the screw 1 and the nut 2 M4 1 from the feed connecting lever assy 2. 2. Pull out the feed connecting lever assy 2 from the shaft of feed adjuster sub assy 3.

  • Page 82: Removal Of Nt Lower Thread Cutter

    Application of Disassembly Feed unit 2-1-2 Removal of NT lower thread cutter 1. Release the hook 1 to remove the cutter cover 2 from the needle plate B 2. Remove the retaining ring CS3 4, and then remove the NT lower thread cutter 5 from the cutter cover 2.

  • Page 83: Removal Of Needle Plate A

    Application of Disassembly Feed unit 2-1-3 Removal of Needle plate A 1. Remove the 2 screws 1, and then remove the needle plate A 1 from the needle plate B 2. 2-1-4 Removal of Stopper plate R/M 1. Remove the screw 1, and then remove the stopper plate R 1 from the needle plate A 2.

  • Page 84: Removal Of Inner Rotary Hook Plate Assy

    Application of Disassembly Feed unit 2-3 Removal of Inner rotary hook plate assy 1. Remove the 2 screws 1, and then remove the inner rotary hook plate assy 2-4 Removal of Base plate 1. Remove the 4 screws 1, and then remove the base plate 1. 2-5 Removal of Feed dog 1.

  • Page 85: Removal Of Feed Supporting Plate

    Application of Disassembly Feed unit 2-7 Removal of Feed supporting plate 1. Remove the screw 1, and then remove the feed supporting plate B 1 and the feed supporting plate 2 from the feed arm assy 3. 2-8 Removal of Set screw collar 1.

  • Page 86: Removal Of Feed Stand Sub Assy

    Application of Disassembly Feed unit 2-9 Removal of Feed stand sub assy 1. Remove the 2 screws 1, and then remove the feed stand sub assy 1 from the feed holder 2. 2-10 Removal of Horizontal feed shaft 1. Remove the horizontal feed shaft 1 from the feed stand sub assy 2. 2-11 Removal of Feed arm assy 1.

  • Page 87: Removal Of V Feed Attachment

    Application of Disassembly Feed unit 2-12 Removal of V feed attachment 1. Release the 2 hooks 1 to remove the V feed attachment 2 from the feed stand sub assy 3. 2. Remove the lock nut 4, and then remove the screw 1 from the feed stand sub assy 3.

  • Page 88: Removal/Disassembly Of Lower Shaft Assy

    Application of Disassembly Feed unit 2-13 Removal/Disassembly of Lower shaft assy 1. Remove the 2 screws 1, and then remove the bushing presser 1 and the lower shaft assy 2 from the feed holder 3. 2. Remove the retaining ring E6 4, and then remove the lower shaft bushing 5 from the lower shaft assy 2.

  • Page 89: Removal Of Outer Rotary Hook Assy

    Application of Disassembly Feed unit 2-15 Removal of Outer rotary hook assy Plastic model 1. Remove the screw 1 from the feed holder 1. 2. Pull out the outer rotary hook shaft 2 to remove the washer 3, the magnet 4, the washer 5, the outer rotary hook assy 6 and the washer thrust 7 from the feed holder 1.
  • Page 90 Application of Disassembly Feed unit Metal model 1. Remove the screw 1 from the feed holder 1. 2. Pull out the outer rotary hook shaft 2 to remove the spacer 3, the magnet 4, the outer rotary hook assy 5, the washer 6 6 and the spacer 7 from the feed holder 1.

  • Page 91: Needle Threading Mechanism

    Application of Disassembly Needle threading mechanism Needle threading mechanism location diagram 3 - 19...

  • Page 92: Disassembly Of Needle Threading Unit

    Application of Disassembly Needle threading mechanism Disassembly of Needle threading unit 1-1 Removal of Thread guard cover assy Type A 1. Remove the screw 1, and then remove the thread guard cover assy 1 from the thread guard assy 2. Type B 1.

  • Page 93: Removal Of Thread Guide Wire

    Application of Disassembly Needle threading mechanism 1-2 Removal of Thread guide wire 1. Remove the thread guide wire 1 from the thread guard cover assy 2. 1-3 Removal of Thread take up spring 1. Remove the spring from the thread guard cover assy 1. 3 - 21...

  • Page 94: Disassembly Of Thread Guard Assy

    Application of Disassembly Needle threading mechanism Disassembly of Thread guard assy Type A 1. Remove the screw 1, and then remove the notched spring 1 from the thread tension holder assy 2. 2. Remove the tension dial shaft 3, and then remove the thread tension dial 4 and the thread tension nut 5 from the shaft of the thread tension holder assy 2.

  • Page 95: Removal Of Thread Guard Supporter Assy

    Application of Disassembly Needle threading mechanism Type B 1. Remove the screw 1, and then remove the notched spring 1 from the thread tension holder assy 2. 2. Remove the tension dial shaft 3, and then remove the thread tension dial 4 and the thread tension nut 5 from the shaft of the thread tension holder assy 2.

  • Page 96: Zigzag Mechanism

    Application of Disassembly Zigzag mechanism Zigzag mechanism location diagram 3 - 24...

  • Page 97: Disassembly Of Z Dial Assy

    Application of Disassembly Zigzag mechanism Disassembly of Z dial assy 1. Remove the retaining ring E4 1, and then remove the Z dial 2 and the notched spring 3 from the shaft 4 of the Z dial holder assy 5. 2.

  • Page 98: Feed Control Mechanism

    Application of Disassembly Feed control mechanism Feed control mechanism location diagram 3 - 26...

  • Page 99: Disassembly Of Lever Holder Assy

    Application of Disassembly Feed control mechanism Disassembly of Lever holder assy 1. Remove the nut 4 1 and the reverse sew adjusting screw 2 from the connecting rod U 3 and connecting rod D 4. 2. Remove the retaining ring E4 5, and then remove the connecting rod U 3 and connecting rod D 4 from the reverse sewing lever C assy 6.

  • Page 100: Disassembly Of Feed Bracket Sub Assy

    Application of Disassembly Feed control mechanism Disassembly of Feed bracket sub assy 1. Open the bobbin winder assy 1, and then remove the bobbin winder spring 2 from the bobbin winder assy 1 and the feed bracket sub assy 3. 2.

  • Page 101: Buttonhole And Pattern Selecting Mechanism

    Application of Disassembly Buttonhole and Pattern selecting mechanism Buttonhole and Pattern selecting mechanism location diagram * There is a model without the retaining ring. 3 - 29...

  • Page 102: Disassembly Of Bh Stopper Assy

    Application of Disassembly Buttonhole and Pattern selecting mechanism Disassembly of BH stopper assy 1. Remove the BH change arm 1 from the BH stopper 2. 2. Remove the retaining ring E4 3, and then remove the BH stopper 2 from the BH stopper holder assy 4.

  • Page 103: Upper Shaft, Needle Bar And Presser Foot Unit

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit Upper shaft, Needle bar and Presser foot unit location diagram 3 - 31...

  • Page 104: Disassembly Of Upper Shaft Assy

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit Disassembly of Upper shaft assy 1. Remove the pulley 1 from the upper shaft assy. Disassembly of Needle-presser module 2-1 Removal of Presser foot holder assy 1. Remove the zigzag presser foot 1 from the presser foot holder assy 2. 2.

  • Page 105: Removal Of Needle Bar Crank Rod Assy / Thread Take-Up Lever

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-3 Removal of Needle bar crank rod assy / Thread take-up lever 1. Remove the needle bar crank rod assy 1 from the shaft of the needle bar block 2. 2.

  • Page 106: Removal Of Bh Lever Holder Assy

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-5 Removal of BH lever holder assy 1. Remove the retaining ring E4 1, and then remove the BH lever holder assy 2 from the base holder assy. 2-6 Removal of Thread guide plate assy 1.

  • Page 107: Removal Of Spring

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-7 Removal of Spring 1. Remove the spring 2-8 Removal of Needle bar assy N 1. Remove the screw 1 from the needle bar block 1. 2. Pull out the needle bar assy N 2 to remove the needle thread position setter 3.

  • Page 108: Removal Of Needle Bar Supporter Arm

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-9 Removal of Needle bar supporter arm 1. Remove the retaining ring E2 1, and then remove the needle bar supporter arm 2 from the shaft of the needle bar supporter assy 3 and the shaft of the needle shaft holder assy 4.

  • Page 109: Removal Of Stopper L

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-12 Removal of Stopper L 1. Remove the screw 1, and then remove the stopper L 1 from the base holder assy. 2-13 Removal of Needle bar supporter assy Type A 1.

  • Page 110: Removal Of Presser Foot Lifter

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit Type B 1. Remove the spring from the plate 1 and the base holder assy. 2. Remove the needle bar supporter assy 2 from the shaft bushing 3 of the base holder assy.

  • Page 111: Removal Of Presser Bar

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-15 Removal of Presser bar 1. Remove the screw 1 from the presser bar clamp 1. 2. Pull out the presser bar 2 to remove the spring 3 and the presser bar clamp 1 from the base holder assy.

  • Page 112: Removal Of Shaft Bushing

    Application of Disassembly Upper shaft, Needle bar and Presser foot unit 2-18 Removal of Shaft bushing 1. Remove the 2 screws 1, and then remove the shaft bushing 1 from the base holder assy. 3 - 40...
  • Page 113 Application of Assembly Upper shaft, Needle bar and Presser foot unit Upper shaft, Needle bar and Presser foot unit location diagram 3 - 41...

  • Page 114: Assembly Of Needle-Presser Module

    Application of Assembly Upper shaft, Needle bar and Presser foot unit Assembly of Needle-presser module 1-1 Attachment of Shaft bushing 1. Set the shaft bushing 1 to the base holder assy, and then secure it with the 2 screws 1. Screw, Bind M3X6 1-2 Attachment of Lock nut...

  • Page 115: Attachment Of Thread Release Lever

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-3 Attachment of Thread release lever 1. Set the thread release lever 1 and the spring to the shaft 2 of the base holder assy, and then attach the retaining ring CS4 3. *Key point •...

  • Page 116: Attachment Of Needle Bar Supporter Assy

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-6 Attachment of Needle bar supporter assy Type A 1. Insert the needle bar supporter shaft 1 into the upper side hole of the needle bar supporter assy 2, and then align the screw hole of the needle bar supporter assy 2 with the hole of the needle bar supporter shaft 1, and then tighten the screw 1 until the position of the right figure.

  • Page 117: Attachment Of Stopper L

    Application of Assembly Upper shaft, Needle bar and Presser foot unit Type B 1. Insert the needle bar supporter shaft 1 into the upper side hole of the needle bar supporter assy 2, and then align the hole of the needle bar supporter assy 2 with the hole of the needle bar supporter shaft 1, and then insert the shaft 3 until the position of the right figure.

  • Page 118: Attachment Of Needle Shaft Holder Assy

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-8 Attachment of Needle shaft holder assy 1. Set the needle shaft holder assy 1 to the bottom side of the base holder assy, and then tighten the screw 1 temporarily. *Key point •...

  • Page 119: Attachment Of Needle Bar Assy N

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-11 Attachment of Needle bar assy N 1. Tighten the needle clamp screw 1 to the needle block 1 of the needle bar assy N 2. 2. Set the needle bar block 3 to the needle thread position setter 4 with the screw 2.

  • Page 120: Attachment Of Thread Guide Plate Assy

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-13 Attachment of Thread guide plate assy 1. Set the needle thread lever assy 1 to the thread guide shaft 2 of the thread guide plate assy 3, and then tighten the screw 1 temporarily. *Key point •...

  • Page 121: Attachment Of Bh Spring

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-15 Attachment of BH spring 1. Set the BH spring 1 to the base holder assy 2 with the screw 1. *Key point • Check that align the boss 3 of the base holder assy 2 with the positioning hole of the BH spring 1.

  • Page 122: Attachment Of Thread Take-Up Lever Link

    Application of Assembly Upper shaft, Needle bar and Presser foot unit 1-17 Attachment of Thread take-up lever link 1. Attach the retaining ring E4 1 to the shaft 2. 2. Set the base holder assy as shown in the right figure, and then insert the shaft 2 into the washer, spring 3, the thread take-up lever link 4 and the base holder assy from the right side, and then secure them with the screw *Key point...

  • Page 123: Buttonhole And Pattern Selecting Mechanism

    Application of Assembly Buttonhole and Pattern selecting mechanism Buttonhole and Pattern selecting mechanism location diagram * There is a model without the retaining ring. 3 - 51...

  • Page 124: Attachment Of Hexagon M4X40.5

    Application of Assembly Buttonhole and Pattern selecting mechanism Attachment of Hexagon M4x40.5 1. Attach the hexagon M4x40.5 1 to the arm bed. Assembly of BH stopper assy 1. Insert the shaft 1 of the BH stopper holder assy 2 to the BH stopper 3, and then attach the retaining ring E4 4.

  • Page 125: Feed Control Mechanism

    Application of Assembly Feed control mechanism Feed control mechanism location diagram 3 - 53...

  • Page 126: Assembly Of Feed Bracket Sub Assy

    Application of Assembly Feed control mechanism Assembly of Feed bracket sub assy 1. Set the bobbin winder shaft spring 1 to the bobbin winder assy 2. 2. Set the bobbin winder rubber band 3 to the bobbin winder assy 2. 3.

  • Page 127: Assembly Of Lever Holder Assy

    Application of Assembly Feed control mechanism Assembly of Lever holder assy 1. Tighten the screw 1 to the reverse sewing lever D assy 2, and then tighten the nut 4 3 to the screw 1 temporarily. *Key point • Fully tighten the nut 4 3 after performing "4-29 Adjustment: SS pattern (triple stretch stitch) stitch length".

  • Page 128: Zigzag Mechanism

    Application of Assembly Zigzag mechanism Zigzag mechanism location diagram 3 - 56...

  • Page 129: Assembly Of Z Dial Assy

    Application of Assembly Zigzag mechanism Assembly of Z dial assy 1. Attach the retaining ring E2 1 to the ES pin F-B 2. 2. Insert the ES pin F-B 2 into the back side of the Z dial 3 and the Z dial connecting rod 4, and then attach the retaining ring E2 5.

  • Page 130: Needle Threading Mechanism

    Application of Assembly Needle threading mechanism Needle threading mechanism location diagram 3 - 58...

  • Page 131: Attachment Of Thread Guard Supporter Assy

    Application of Assembly Needle threading mechanism Attachment of Thread guard supporter assy 1. Insert the shaft of the thread guard supporter assy 1 to the arm bed with the screw 1. *Key point • There is a model without the thread guard supporter assy 1. Taptite, Bind S M4X10 3 - 59...

  • Page 132: Assembly Of Needle Threading Unit

    Application of Assembly Needle threading mechanism Assembly of Needle threading unit 2-1 Assembly of Thread guard assy Type A 1. Set the thread tension adjusting screw 1 to the thread tension nut 2. 2. Insert the tension disc A 3, the tension plate 4, the tension release plate 5, the spring holder 6 and the spring in this order into the shaft 7 of the thread tension holder assy 8.
  • Page 133 Application of Assembly Needle threading mechanism Type B 1. Set the thread tension adjusting screw 1 to the thread tension nut 2. 2. Insert the tension disc A 3, the tension plate 4, the tension release plate 5, the spring holder 6 and the spring in this order into the shaft 7 of the thread tension holder assy 8.

  • Page 134: Attachment Of Thread Take Up Spring

    Application of Assembly Needle threading mechanism 2-2 Attachment of Thread take up spring 1. Set the spring to the thread guard cover assy 1 as shown in the right figure. THREAD TAKE UP SPRING XE9100*** 2-3 Attachment of Thread guide wire 1.
  • Page 135 Application of Assembly Needle threading mechanism Type B 1. Set the thread guard cover assy 1 to the thread tension holder assy 2 as shown in the right figure, and then secure it with the screw 1. *Key point • Check that engage the 3 protrusions 3 of the thread tension holder assy 2 with the 3 gullets of the thread guard cover assy 1.

  • Page 136: Feed Unit

    Feed unit Application of Assembly Feed unit location diagram (Metal Model) (Plastic Model) 3 - 64...

  • Page 137: Assembly Of Feed Module

    Application of Assembly Feed unit Assembly of Feed module 1-1 Attachment of Outer rotary hook assy Plastic model 1. Set the washer thrust 1, the outer rotary hook assy 2, the washer 3, the magnet 4 and the washer 5 in this order to the feed holder 6, and then insert the outer rotary hook shaft 7 to them.

  • Page 138: Attachment Of Feed Arm Supporter

    Application of Assembly Feed unit Metal model 1. Set the spacer 1, the washer 6 2, the outer rotary hook assy 3, the magnet 4 and the spacer 5 in this order to the feed holder 6, and then insert the outer rotary hook shaft 7 to them. 2.

  • Page 139: Assembly/Attachment Of Lower Shaft Assy

    Application of Assembly Feed unit 1-3 Assembly/Attachment of Lower shaft assy 1. Set the set screw collar 1, the washer thrust 2, the lower shaft bushing 3 and the washer thrust 4 to the lower shaft assy 5, and then attach the retaining ring E6 6.

  • Page 140: Attachment Of V Feed Attachment

    Application of Assembly Feed unit 1-4 Attachment of V feed attachment 1. Attach the lock nut 1 to the screw 1. *Key point • Tighten the lock nut 1 to about a quarter of the screw 1. 2. Attach the screw 1 to the feed stand sub assy 2. *Key point •...

  • Page 141: Attachment Of Horizontal Feed Shaft

    Application of Assembly Feed unit 1-6 Attachment of Horizontal feed shaft 1. Insert the horizontal feed shaft 1 into the feed stand sub assy 2. *Key point • Check that there is the groove 3 of the horizontal feed shaft 1 as shown in the right figure position.

  • Page 142: Attachment Of Set Screw Collar

    Application of Assembly Feed unit 1-8 Attachment of Set screw collar 1. Set the washer thrust and the set screw collar 1 to the horizontal feed shaft, and then tighten the screw 1 temporarily (2 locations). *Key point • Fully tighten the screw after performing "2-47 Attachment of Feed module".

  • Page 143: Attachment Of Feed Stand Supporter

    Application of Assembly Feed unit 1-10 Attachment of Feed stand supporter 1. Set the feed stand supporter 1 to the feed stand sub assy 2 with the 2 screws 1. 2. Hang the spring on the feed stand supporter 1 and the feed holder 3 as shown in the right figure.

  • Page 144: Attachment Of Inner Rotary Hook Assy

    Application of Assembly Feed unit 1-14 Attachment of Inner rotary hook assy 1. Set the inner rotary hook assy 1 to the outer rotary hook assy. 1-15 Assembly/Attachment of Needle plate assy 1. Set the needle plate assy 1 to the base plate, and then secure it with the 2 screws 1.

  • Page 145: Attachment Of Needle Plate A

    Application of Assembly Feed unit 1-15-2 Attachment of Needle plate A 1. Set the needle plate A 1 to the needle plate B 2, and then secure it with the 2 screws 1. Screw, Pan (S/P washer) M2.6X6 3 - 73...

  • Page 146: Attachment Of Nt Lower Thread Cutter

    Application of Assembly Feed unit 1-15-3 Attachment of NT lower thread cutter 1. Set the NT lower thread cutter 1 to the back side of the cutter cover 2, and then attach the retaining ring CS3 3. 2. Set the cutter cover 2 to the needle plate B 4. *Key point •...

  • Page 147: Assembly Of Feed Adjuster Assy

    Application of Assembly Feed unit Assembly of Feed adjuster assy 1. Insert the feed adjuster sub assy 1 into the spring , the feed adjusting shaft holder 2 and the feed connecting lever assy 3. 2. Set the screw 1 to the feed connecting lever assy 3, and then tighten the nut 2 M4 4 temporarily.

  • Page 148: Main Motor Unit

    Application of Assembly Main motor unit Main motor unit location diagram 220 to 240V 120V 3 - 76...

  • Page 149: Assembly Of Motor 3P Supply Assy

    Application of Assembly Main motor unit Assembly of Motor 3P supply assy 120V specification 1. Set the motor T-pulley 1 and the frange 2 to the shaft of the motor assy 3, and then attach the retaining ring E3 4. *Key point •...
  • Page 150 Application of Assembly Main frame and Covers Main frame and Covers location diagram 3 - 78...

  • Page 151: Assembly Of Rear Cover Assy

    Application of Assembly Main frame and Covers Assembly of Rear cover assy 1-1 Attachment of Thread guide assy 1. Set the thread guide assy 1 to the rear cover assy, and then tighten the screw 1 temporarily. *Key point • Fully tighten the screw 1 after performing "4-41 Adjustment: Bobbin winder".

  • Page 152: Assembly Of Front Cover Assy

    Application of Assembly Main frame and Covers Assembly of Front cover assy 2-1 Attachment of Rubber cushion A 1. Set the rubber cushion A 1, the washer 2 and the washer plain M3.5 3 to the bottom side of the front cover assy, and then secure them with screw Taptite, Pan B M3.5X12 2-2 Attachment of LED lamp supply assy...

  • Page 153: Assembly Of Face Plate Assy

    Application of Assembly Main frame and Covers Assembly of Face plate assy 1. Set the NT lower thread cutter 1 to the face plate assy. 2. Set the face plate cutter holder 2 to the face plate assy, and then secure it with the screw 1.
  • Page 154 Adjustment Preparation Removal of covers .......4 - 2 Inspection Needle point damage.......4 - 4 Adjustment Timing belt tension .......4 - 5 Motor belt tension.........4 - 6 Needle bar supporter stopper L position ..4 - 8 Needle bar supporter stopper R position ..4 - 9 Needle swing timing ......4 - 10 Three point needle drop .....4 - 13 Left and right needle clearance ..4 - 14...

  • Page 155: Removal Of Covers

    Preparation Removal of covers This sewing machine stands up for oneself in the state that the front cover and rear cover are removed. There are feasible adjustments without covers, but recommend that adjust after removing the front cover and rear cover basically.
  • Page 156 Preparation Removal of covers <From previous page> 11. Lower the presser foot lifter. 12. Remove the 3 screws 4 on the front side of the arm bed, and then remove the rear cover. Taptite, Cup P M4X20 Rear cover Power supply unit Rear cover Rear cover Presser foot lifter...

  • Page 157: Needle Point Damage

    Inspection Needle point damage 1. Put needle on a level block, and check a needle is not bent. The gap with the block should be even. Level block 2. Slide a needle on your finger and check if moves smoothly (no damage on needle point). 4 - 4...

  • Page 158: Timing Belt Tension

    Adjustment Timing belt tension [Standard] The belt slack should be 2.5 to 3 mm when pushing the center of the timing belt between the upper shaft pulley and the tension pulley with a force of 1.96 N (200g). [Adjustment] 1. Turn off the power, and then remove the foot controller. 2.

  • Page 159: Adjustment

    Adjustment Motor belt tension 120V specification [Standard] The belt slack should be 3.5 to 4.5 mm when pushing the center of the motor belt between the T pulley of the upper shaft and the T pulley of the motor with a force of 0.98 N (100g). [Adjustment] 1.

  • Page 160: Motor Belt Tension

    Adjustment Motor belt tension 220 to 240V specification [Standard] The belt slack should be 4.6 to 6 mm when pushing the center of the motor belt between the T pulley of the upper shaft and the T pulley of the motor with a force of 0.98 N (100g). [Adjustment] 1.

  • Page 161: Needle Bar Supporter Stopper L Position

    Adjustment Needle bar supporter stopper L position [Standard] At pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum), when the needle is dropped to the left side, the clearance between the needle bar supporter and the stopper L should be 0.3 to 0.6 mm. [Adjustment] 1.

  • Page 162: Needle Bar Supporter Stopper R Position

    Adjustment Needle bar supporter stopper R position [Standard] At pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum), when the needle is dropped to the right side and the pattern selection dial is turned, the minimum clearance between the needle bar supporter and the stopper R should be 0 to 0.2 mm. [Adjustment] 1.

  • Page 163: Needle Swing Timing

    Adjustment Needle swing timing [Standard] At pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum), when the needle bar starts oscillating movement from left to right, the distance from the needle plate top surface to the needle top should be 5 ±0.4 mm (4.6 to 5.4 mm). * When the needle bar stops oscillating movement from left to right, the distance from the needle plate top surface to the needle top should be 7 ±0.4 mm (6.6 to 7.4 mm).
  • Page 164 Adjustment Needle swing timing <From previous page> 10. Move the worm gear to the right side until the right side surface of the worm gear contacts to the upper shaft bushing by turning the worm gear by hand to the direction of the arrow 1. 11.
  • Page 165 Adjustment Needle swing timing <From previous page> [Confirmation] When the pulley is turned by hand from the rear to the front, check that the needle flow from left to right is normal. And check that the upper shaft rotation is not too heavy. [ OK ] Pattern cam Pattern cam...

  • Page 166: Three Point Needle Drop

    Adjustment Three point needle drop [Standard] At pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum), the left and right needle drop position should be the same to the center of the needle hole. [Adjustment] 1. Turn off the power, and then remove the foot controller. 2.

  • Page 167: Left And Right Needle Clearance

    Adjustment Left and right needle clearance [Standard] At pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum), the left and right needle drop position should be the same to the center of the needle hole. [Adjustment] 1. Remove the face plate and the accessory table. 2.

  • Page 168: Right Needle Drop Position (Zigzag Stitch)

    Adjustment Right needle drop position (zigzag stitch) [Standard] At pattern selection dial [3] (zigzag stitch) and right needle drop, when the swing width of the needle bar is changed between the stitch width dial [5] (maximum) and [0] (minimum), the horizontal moving distance of the needle top should be 0.1 mm or less. [Adjustment] 1.

  • Page 169: Right Needle Drop Position (Zigzag Stitch)

    Adjustment Right needle drop position (zigzag stitch) <From previous page> 9. Loosen the screw 1 of the zigzag adjusting nut. 10. When the zigzag adjusting nut is turned with a spanner, and the stitch width dial is turned and the swing width of the needle bar is changed between the [5] (maximum) and [0] (minimum), adjust the horizontal moving distance of the needle top to 0.1 mm or less.

  • Page 170: Needle Drop Position To Presser Foot Hole (Front/Back).4

    Adjustment Needle drop position to presser foot hole (front/back) [Standard] At pattern selection dial [2] (straight stitch) and stitch width dial [2.5] (center base line), when the needle top is dropped into the needle hole of the presser foot, the clearance between the needle hole of the presser foot and the needle top should be the same in the front/back direction.

  • Page 171: Inner Rotary Hook Plate Position

    Adjustment Inner rotary hook plate position [Standard] When the inner rotary hook assy is pushed to the needle side (from front to rear), the overlap between the spring plate of the inner rotary hook plate and the protrusion A of the inner rotary hook assy in the front/back direction should be 2.5 to 2.8 mm.

  • Page 172: Needle Bar Rising

    Adjustment Needle bar rising [Standard] At pattern selection dial [2] (straight stitch) and stitch width dial [5] (left base line), the right edge of the needle matches up with the outer rotary hook point when the needle bar is raised 3.1 ±0.2 mm (2.9 to 3.3 mm) from its lowest point. [Adjustment] 1.
  • Page 173 Adjustment Needle bar rising <From previous page> 10. Match up the right edge of the needle with the outer rotary hook point by turning the outer rotary hook assy counterclockwise by hand. *Key point • When the right edge of the needle matches up with the outer rotary hook point, the large side of the eccentric amount of the feed cam of the lower shaft should be facing directly frontward.

  • Page 174: Needle Bar Height

    Adjustment Needle bar height [Standard] At pattern selection dial [2] (straight stitch) and stitch width dial [5] (left base line), the gap between the top of needle eye and the lower end of the outer rotary hook point in the up/down direction should be 1.2 ±0.2 mm (1 to 1.4 mm) when the right edge of the needle matches up with the outer rotary hook point.

  • Page 175: Needle Clearance

    Adjustment Needle clearance [Standard] At pattern selection dial [2] (straight stitch) and stitch width dial [5] (left base line), the clearance between the scarf of the needle and the outer rotary hook point should be 0.15 to 0.3 mm when the rear side of the needle aligns with the outer rotary hook point. [Adjustment] 1.

  • Page 176: Left Straight Stitch Needle Drop And Zigzag Stitch Maximum Left Needle Drop Position

    Left straight stitch needle drop and zigzag stitch maximum Adjustment left needle drop position [Standard] The left needle drop position at pattern selection dial [3] (zigzag stitch) and stitch width dial [5] (maximum) and the needle drop position at pattern selection dial [2] (straight stitch) and stitch width dial [5] (left base line) should be matched.
  • Page 177 Left straight stitch needle drop and zigzag sitich maximum Adjustment left needle drop position <From previous page> 9. Turn the pattern selection dial until the [2] (straight stitch) is the topmost position. (Keep the stitch width dial to [5].) 10. Lower the needle bar until the needle top comes near the paper. Pulley Stitch width dial Needle bar...

  • Page 178: Feed Dog Position (Front/Back And Left/Right)

    Adjustment Feed dog position (front/back and left/right) [Standard] 1 At pattern selection dial [2] (straight stitch), stitch width dial [2.5] (center base line) and stitch length dial [4] (feed : maximum), the minimum clearance between the front of the feed dog and the needle plate should be 0.6 to 1.3 mm. 2 The left and right clearance between the feed dog and the needle plate should be the same.

  • Page 179: Feed Dog Height

    Adjustment Feed dog height [Standard] When the feed dog is its highest position, the feed dog height from the surface of the needle plate should be 1 ±0.1 mm (0.9 to 1.1 mm). When the feed dog is its lowest position, the feed dog is 0.3 mm or more lower than the surface of the needle plate.

  • Page 180: Presser Bar Height

    Adjustment Presser bar height [Standard] When the presser foot is raised, the clearance between the bottom surface of the presser foot and the surface of the needle plate should be 6.4 ±0.25 mm (6.15 to 6.65 mm). [Adjustment] 1. Turn off the power, and then remove the foot controller. 2.

  • Page 181: Upper Thread Tension

    Adjustment Upper thread tension [Standard] At upper tension-control dial [4], when the schappe spun thread #60 is passed through the tension disc and the presser foot lifter is lowered and the thread is pulled down slowly with the tension gauge, the thread tension should be 0.37 to 0.42 N (38 to 43 gf). [Adjustment] 1.

  • Page 182: Ss Pattern (Triple Stretch Stitch) Stitch Length

    Adjustment SS pattern (triple stretch stitch) stitch length [Standard] At SS pattern (triple stretch stitch), the stitch length should be the same when sewing forward and backward. [Adjustment] 1. Remove the face plate, the pattern selection dial and the front cover. 2.

  • Page 183: Feed Distance

    Adjustment Feed distance [Standard] At pattern selection dial [2] (straight stitch), stitch width dial [5] (left base line) and stitch length dial [0] (feed : 0), the feed length should be 1 mm or less when sewing at 10 pitches. At pattern selection dial [2] (straight stitch), stitch width dial [5] (left base line) and stitch length dial [4] (feed : maximum), the feed length should be more than 36 mm when sewing at 10 pitches.

  • Page 184: Feed Distance

    Adjustment Feed distance <From previous page> 12. Tighten the screw 1 of the feed dial gear to secure the feed dial gear. Set Screw, Socket (CP) M4X4 13. Turn the stitch length dial until the [4] is the topmost position. Feed dial gear Stitch length dial Pulley...

  • Page 185: Straight Forward/Straight Reverse Stitch Length

    Adjustment Straight forward/Straight reverse stitch length [Standard] At pattern selection dial [2] (straight stitch), stitch width dial [2.5] (center base line) and stitch length dial [2] (feed length : 2 mm), the difference between the forward stitch length (10 pitches) and the reverse stitch length (10 pitches) should be within ±4 mm. [Adjustment] 1.
  • Page 186 Adjustment Straight forward/Straight reverse stitch length <From previous page> 10. Loosen the nut 4 on the adjusting screw of the connecting rod assy. *Key point • Do not loosen the nut 4 too much. (When the nut 4 is loosened too much, the adjusting screw is removed.) 11.

  • Page 187: Bh Lever Switch Load

    Adjustment BH lever switch load [Standard] When the BH lever is pushed from the rear to the front, the switching road of the position should be 0.5 to 1.5 N (50 to 150 gf). And when the BH lever is pushed from the front to the rear, the switching road of the position should be 0.5 to 3.0 N (50 to 300 gf).

  • Page 188: Left Reverse Stitch Of Buttonhole Stitch Length

    Adjustment Left reverse stitch of buttonhole stitch length Need to adjust “4-30 Feed distance” before this adjustment. [Standard] At pattern selection dial [1] (buttonhole stitch bar tack) and stitch length dial [F], Set the BH presser, when the bar tack sewing is executed to the double broadcloth with a schappe spun thread #60, the standard is as follows.
  • Page 189 Adjustment Left reverse stitch of buttonhole stitch length <From previous page> 8. Pull down the BH lever to the downmost, and then switch the position to the rear side by pushing the BH lever from the front to the rear. 9.

  • Page 190: Bh Stitch Bar Tack Feed Distance

    Adjustment BH stitch bar tack feed distance Need to adjust “4-35 Left reverse stitch of buttonhole stitch length” before this adjustment. [Standard] At pattern selection dial [1] (buttonhole stitch bar tack) and stitch length dial [F], Set the BH presser, when the bar tack sewing is executed to the double broadcloth with a schappe spun thread #60, the stitch bar tack feed distance should be 1 mm or less when sewing at 10 pitches.

  • Page 191: Bh Stitch Bar Tack Feed Distance

    Adjustment BH stitch bar tack feed distance <From previous page> 11. Loosen the nut 4 of the adjusting screw of the BHF finger assy. 12. Adjust the stitch bar tack feed distance by turning the adjusting screw of the BHF finger assy. *Key point •...

  • Page 192: Bh Sewing Length

    Adjustment BH sewing length [Standard] At pattern selection dial [1] (buttonhole stitch bar tack), set the button 20 mm in diameter to the BH presser, when the bar tack sewing is executed, the inside length of the stitch bar tack should be 22 ±1 mm (21 to 23 mm).
  • Page 193 Adjustment BH sewing length <From previous page> 11. Loosen the screw 1 of the BH change arm. 12. Move the position of the BH lever back and forth, and then loosen the screw 1 of the BH change arm. *Key point •...

  • Page 194: Bobbin Winder

    Adjustment Bobbin winder [Standard] • The thread should be wound parallel to the bobbin. • The bobbin winding quantity should be filling 80 to 90% of the diameter. [Adjustment] 1. When the front cover and the rear cover are removed, attach them. 2.

  • Page 195: Needle Threader

    Adjustment Needle threader [Standard] • The hook of the needle thread lever should be passed into the needle eye. • The clearance between the upside of the hook and the top of the needle eye should be 0.03 to 0.13 mm. [Adjustment] 1.
  • Page 196 Adjustment Needle threader <From previous page> 9. Loosen the screw 4 of the needle thread lever. 10. Move the needle thread lever up and down to adjust the clearance between the upside of the hook and the top of the needle eye. 11.

  • Page 197: Lower Thread Tension

    Adjustment Lower thread tension [Standard] When the schappe spun thread #60 is pulled from the inner rotary hook assy slowly with the tension gauge, the thread tension should be 0.1 to 0.12 N (10 to 12 gf). [Adjustment] 1. Remove the 2 screws 1 of the needle plate assy, and remove the needle plate assy. Screw needle plate 2.

  • Page 198: Failure Investigation For Electronic Parts

    Failure Investigation for Electronic Parts Sewing lamp does not light ........5 - 2 Main motor does not turn or Rotation speed is slow ..5 - 3 5 - 1...

  • Page 199: Sewing Lamp Does Not Light

    Failure Investigation for Electronic Parts Sewing lamp does not light Sewing lamp does not light. When unplug the foot controller plug from the socket of the machine, is the Replace the foot controller. voltage between pins A of the plug 108 to 132V AC? (for 120V AC countries) * * Refer to Fig.

  • Page 200: Main Motor Does Not Turn Or Rotation Speed Is Slow

    Failure Investigation for Electronic Parts Main motor does not turn or Rotation speed is slow Main motor does not turn when pressing foot controller. Rotation speed is slow. Refer to "5-2 Sewing lamp Is the sewing lamp turned on? does not light". Reassemble the upper shaft Does the pulley turn smoothly? assy.

  • Page 201: Special Instructions Of Wiring

    Special Instructions of Wiring Motor 3P supply assy ..........6 - 2 LED lamp ..............6 - 4 6 - 1...
  • Page 202 Special Instructions of Wiring Motor 3P supply assy 1. Attachment of motor 120V specification Attach the motor so that the outlet of motor cable is the upper side. Upper side Outlet of motor cable Motor A view 220 to 240V specification Attach the motor so that the outlet of motor cable is the upper side.
  • Page 203 Special Instructions of Wiring Motor 3P supply assy 2. Wiring of motor cable 120V specification A view Pass the motor cable through between the motor and the lower shaft plate. Do not pass the motor cable through between the lower shaft plate and the motor holder. Motor cable Motor Motor holder...
  • Page 204 Special Instructions of Wiring LED lamp 1. Wiring on inside of front cover. Secure the lead wire with the retaining ring CS4. (5 locations) 2. Wiring on lower side of arm bed. 6 - 4...

This manual is also suitable for:

Lx37ntXq3700Bm3700Bm3850Lx27ntBn27 ... Show all

Table of Contents

Save PDF