Brother VX Series, Service Manual

Page 1: ......

Page 2: ...orth seam at automatic reverse patterns 11 Adjustment of button hole seams 12 1 Needle swing in straight stitch sewing 12 2 Needle swing in straight stitch sewing 12 3 Needle swing in straight stitch sewing 13 1 Centering of the needle 13 2 Centering of the needle 14 Position of feed cam 15 1 Setting of maximum stitch width 15 2 Setting of maximum stitch width 15 3 Setting of maximum stitch width ...

Page 3: ...llowing the instruction book because the causes in many cases are due to 2 Adjust following numbers in circle in each instruction mis use or carelessness Therefore we recommend you to refer to CHECK LIST FOR BETTER SEWING in the instruction book before you try to repair 3 Symbols used are Suggest to use this manual with PARTS CATALOGUE when you try to repair and pick up a point or points Model num...

Page 4: ...OOK or 1 Improper positioning of needle plate 1 Incorrect setting of the needle TO CHANGE THE NEEDLE I I Refer to SERVICE MANUAL Item No following models 2 MATERIAL NOT FEEDING TO CHANGE THE NEEDLE TO CHECK THE NEEDLE UPPER THREADING TO CHANGE NEEDLE PLATE VX511 VX541 VX561 VX581 VX611 VX641 VX661 VX681 VX710 VX720 VX740 VX760 VX780 2 3 1 4 1 3 Improper clearance between the needle and shuttle hoo...

Page 5: ......

Page 6: ......

Page 7: ...0 VX760 VX780 10 2 14 BREAKING OF UPPER THREAD 1 Incorrect relation of needle thread 2 Bent or blunt needle 3 Inferior needle eye 4 Incorrect threading 5 Inferior needle slot of needle plate 6 Upper thread tension too tight 7 Scratch on the shuttle hook Relative chart Change the needle Change the needle Upper threading Change needle plate Thread tension Change the shuttle hook 15 BREAKING LOWER TH...

Page 8: ...er thread tension dial 2 Setting of pattern dial 5 4 1 5 6 1 4 Drive belts VX710 VX720 VX740 VX760 VX780 2 5 1 vx710 21 1 VX720 23 1 VX581 VX516 VX546 VX566 VX586 VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX720 VX740 VX760 VX780 21 2 VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX740 VX760 VX780 23 2 ...

Page 9: ...VX666 VX686 VX710 VX720 VX740 VX760 VX780 Before adjustment Set the stitch width regulator at 5 Max and check needle comes to the right side q 0 1 1 0 mm 0 0 mm 1 1 Height of presser bar VX710 1 2 Height of presser bar VX511 VX541 VX561 VX581 VX516 VX546 VX566 VX586 VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX720 VX740 VX760 VX780 ...

Page 10: ...X661 VX681 VX710 VX720 VX740 VX760 VX780 Before adjustment Set the stitch width regulator at 0 Note When you adjusted this item check item 4 1 3 2 Clearance between needle and hook point VX516 VX546 VX566 VX586 VX616 VX646 VX666 VX686 Note When you adjusted this item check item 4 2 ...

Page 11: ......

Page 12: ...ace way VX511 VX541 VX561 VX581 VX611 VX641 VX661 VX681 VX710 VX720 VX740 VX760 VX780 VX516 VX546 VX566 VX586 VX616 VX646 VX666 VX686 Shuttle driver 0 05 0 2 0 mm 1 0 mm 0 mm 0 2 mm 0 05 0 2 mm 1 f Raceway Note When you adjusted this item check item 4 1 Note When you adjusted this item check item 4 2 1 1 ...

Page 13: ...6 1 Position of vertical feed cam 6 2 Position of vertical feed cam VX511 VX541 VX561 VX581 VX611 VX641 VX661 VX681 VX710 VX720 VX740 VX760 VX780 VX516 VX546 VX566 VX586 VX616 VX646 VX666 VX686 1 2 ...

Page 14: ...1 VX541 VX561 VX581 VX611 VX641 VX661 VX681 VX710 VX720 VX740 VX760 VX780 Before adjustment Set the st tch length regulator at 4 Max st tch w d t h regulator at 0 0 0 9 11 mm 7 2 Height of feed dog VX516 VX546 VX566 VX586 VX616 VX646 VX666 VX686 ...

Page 15: ...adjustment Set the stltch length regulator at 4 Max st tch w d t h regulator at 0 9 1 Back and forth seam VX710 Before adjustment Set the st tch 9 2 Back and forth seam VX511 VX541 VX561 VX581 VX516 VX546 VX566 VX586 VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX720 VX740 VX760 VX780 length regulator at 2 0 ...

Page 16: ...t tchlength regulator a t SS Stretch Stitch 10 2 Back and forth seam at automatic reverse patterns VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX740 VX760 VX780 Before adjustment Set the pattern selecting dlal at SS Stretch St tch Note When adjusted th s Item check Item 11 ...

Page 17: ...X581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX740 VX760 VX780 Before adjustment Set the pattern selecting dial at 1 l f the buttonhole seams are too fine or too coarse change the screw hole as follows by loosing the screw A completely ...

Page 18: ......

Page 19: ...X541 VX561 VX581 VX516 VX546 VX566 VX586 VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX720 VX740 VX760 VX780 VX511 VX541 VX561 VX581 VX516 VX546 VX566 VX586 VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX710 VX720 VX740 VX760 VX780 Before adjustment Set the stitch width regulator at 0 o o ...

Page 20: ......

Page 21: ......

Page 22: ... VX511 VX516 VX611 VX616 17 3 Contact of upper shaft gear pattern cam and feed cam VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX720 VX740 VX760 VX780 Note When you adjusted thls item check item 18 3 Note When you adjusted thls tem check item 18 1 Note When you adjusted thls tem check item 18 2 ...

Page 23: ......

Page 24: ...that cam finger becomes disengaged VX760 VX780 3 mm 19 1A Clearance between cam finger and pattern cam VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX720 VX740 VX760 VX780 Before adjustment VX720 VX546 VX541 VX566 VX561 VX586 VX581 VX646 VX641 VX666 VX661 VX686 VX681 VX740 VX760 VX780 Set the stitch width regulator at 5 Set the pattern dial between SS stretch stitch and ...

Page 25: ...X641 VX661 VX681 VX646 VX666 VX686 VX720 VX740 VX760 VX780 VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX720 VX740 VX760 VX780 Before adjustment Set the pattern dial at SS stretch stitch Before adjustment Set the pattern dial at SS stretch stitch Cam finger VS Pattern cam Cam finger VS Feed cam 2 4 ...

Page 26: ... VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 VX720 VX740 VX760 VX780 If the upper thread tenslon IS too tlght or too loose adjust the nut After thls adjustment make sure 22 Adjustment of feed dog move ment at buttonhole sewing VX541 VX561 VX581 VX546 VX566 VX586 VX641 VX661 VX681 VX646 VX666 VX686 VX740 VX760 VX780 Before adjustment Set the stitch length regulator at 4 ...

Page 27: ......

Page 28: ... panel VX511 VX541 VX561 VX581 VX516 VX546 VX566 VX586 24 1 How to take off stitch width stitch length dial and arm panel VX720 VX740 VX760 VX780 f 24 2 How to take off stitch width stitch length dial and arm panel VX611 VX641 VX661 VX681 VX616 VX646 VX666 VX686 ...

Page 29: ...511 VX541 Vx561 VX581 611 VX641 VX661 VX681 Then fasten the two screws If this spring does not work adjust ...

Page 30: ......