Baby Lock BL9, Service Manual And Parts List

Page 1: ...SERVICING MANUAL PARTS LIST MODEL BL9 BABYLOCK ...

Page 2: ... 10 NEEDLE SWING 11 NEEDLE DROP 12 CLEARANCE BETWEEN NEEDLE AND HOOK ADJUSTMENT METHOD NO 1 13 CLEARANCE BETWEEN NEEDLE AND HOOK ADJUSTMENT METHOD NO 2 14 FEED DOG HEIGHT 15 NEEDLE BAR HEIGHT 16 NEEDLE TIMING TO SHUTTLE 17 BUTTONHOLE FEED BALANCE 18 FEED BALANCE ON STRETCH STITCH 19 BARTACK FEED OF BUTTONHOLE 20 DISENGAGEMENT OF CAM FOLLOWER 21 MOTOR BELT TENSION 22 WIRING 23 PARTS LIST 24 41 ...

Page 3: ...needle 6 Inappropriate needle bar See mechanical adjustment P 16 height Needle bar height 7 Inappropriate needle to hook See mechanical adjustment P 17 timing Needle timing to shuttle 8 Inappropriate needle to hook See mechanical adjustment P 13 14 clearance Clearance between needle and hook 2 Fabric not 1 Incorrect feed dog height See mechanical adjustment P 15 moving Feed dog height 2 Thread on ...

Page 4: ...n thread 2 Too much thread is around on Adjust the position of stopper the bobbin 3 Lint is stuck inside the hook Clean the hook race race 4 Thread quality is too low Change to a high quality sewing thread 5 Thread is jamming around the Clear out the jamming thread bobbin 6 Bobbin thread tension is too Adjust bobbin thread tension P 9 strong correctly 5 NEEDLE 1 Needle is hitting the needle See me...

Page 5: ...t P 22 Motor belt tension 4 Upper shaft gear is loose Eliminate the looseness 5 Not enough oil Oil all moving parts 7 Deformation of 1 Inappropriate zigzag See mechanical adjustment P 11 pattern synchronization Needle swing 2 Inappropriate disengagement See mechanical adjustment P 21 of cam follower disengagement of cam follower 3 Upper thread tension is too Adjust upper thread tension P 8 strong ...

Page 6: ...4 MODEL BL9 SERVICE ACCESS FACE COVER 1 Remove the face cover by removing the setscrew A BELT COVER 1 Loosen setscrew B 2 Take the belt cover out B B Belt cover A Face cover ...

Page 7: ...5 MODEL BL9 SERVICE ACCESS BASE PLATE To remove 1 Loosen the setscrews A 2 Remove the base plate To attach 3 Mount the base plate by four setscrews Base plate A ...

Page 8: ...t cover See page 4 2 Remove dials A and B 3 Loosen setscrews C D E F and G and then remove the front cover by removing setscrews H I AND J NOTE Remove the front cover in the order of K To attach 4 Mount the front cover in reverse procedure of the removing A I J K H E F G D Front cover C B Cap ...

Page 9: ...oosen setscrews A B C and D 2 pcs and then remove the rear cover by removing setscrews E F G and H NOTE Remove the rear cover in the order of X lower part Y upper part Z presser foot lifter part remove the bed cover together To attach 3 Mount the rear cover in reverse procedure of the removing A B C F E Rear cover D H G Y X Z Cap ...

Page 10: ...n dial at 3 make sure the foot should be lowered If the tension is out of the standard range adjust it as follows Adjustment procedure 1 Remove the front cover unit See page 6 2 Turn the adjusting nut C in the direction of D when the upper thread tension is too tight Turn the adjusting nut C in the direction of E when the upper thread tension is too loose 3 Attach the front cover unit B C E D ...

Page 11: ...ad tension should be 45 55g when pulling the thread in the direction of B If the tension is out of the range adjust it as follows Adjustment procedure 1 Turn the adjusting screw C in the direction of D when the bobbin thread tension is too tight 2 Turn the adjusting screw C in the direction of E when the bobbin thread tension is too loose B E D C Cotton thread 50 ...

Page 12: ...ver See page 4 2 Remove the presser foot lever and loosen the screw C on the presser bar holder Adjust the distance between the presser foot D and the needle plate D to 6 0 mm 0 24 3 Tighten the screw C securely 4 Tighten the screw B to secure the lamp socket 5 Attach the face cover NOTE When you tighten the screw B make sure that both sides of the presser foot are parallel to the feed dog slots F...

Page 13: ...mum zigzag width and remove the front cover See page 6 2 Loosen two screws 3 Adjust the needle swing by turning the handwheel while holding the worm so as not to rotate it until the needle swing starts at 2 3 mm on the needle plate after the needle has come out of the right side of the needle hole 4 Tighten two screws 5 Mount the front cover NOTE After adjusting the needle swing check that the upp...

Page 14: ...dle drop positions should be equal If not adjust as follows Adjustment procedure 1 Remove the face cover See page 4 2 Set the pattern selector dial at maximum zigzag width 3 Loosen the screw 4 Turn the eccentric pin to adjust the needle drop 5 Tighten the screw 6 Attach the face cover NOTE Check the hook timing after this adjustment Eccentric pin Screw Both clearances should be equal ...

Page 15: ...m If clearance is too wide move the needle bar supporter to direction B If clearance is too narrow move the needle bar supporter to direction C NOTE After this adjustment check that the clearance between the needle and needle plate is more than 0 15 mm as shown in figure D if not adjust the clearance between needle and shuttle race by using adjustment method above after readjust the clearance betw...

Page 16: ... the clearance between the needle and the shuttle race in the range of 0 05 to 0 10 mm 5 Set the pattern select dial at turn the handwheel to check if the clearance between the needle and inner edges of the shuttle race spring at the left and right needle drops are equal If not adjust by turning the shuttle race unit 6 Tighten the two shuttle race screws B 7 Loosen the set screw on the lower shaft...

Page 17: ...ot in the range adjust as follows Adjustment procedure 1 Open the shuttle cover 2 Lower the presser foot and turn the handwheel toward you until the feed dog comes to its highest point 3 Loosen the screw A 4 Turn the feed lifting pin to adjust the height of feed dog 0 75 0 90 mm 5 Tighten the screw A 6 Turn the handwheel toward you to recheck the height of feed dog Screw A Feed lifting pin 0 75 0 ...

Page 18: ...m Adjustment procedure 1 Open the face cover 2 Set the pattern selector dial at 3 Open the shuttle cover 4 Remove the shuttle race ring 5 Turn the handwheel toward you until the tip of the shuttle hook meets the left side of the needle 6 Loosen the lower shaft crank arm screw A 7 Adjust the height of the needle bar by moving the needle bar upward or downward without turning it 8 Tighten the screw ...

Page 19: ...el toward you until the tip of the shuttle hook meets the left side of the needle 6 Loosen the lower shaft crank arm screws A 7 While holding the shuttle hook so it doesn t turn turn the handwheel toward you until the needle comes to its lowest position Then further turn the handwheel to raise the needle about 1 7 mm from its lowest position 8 Tighten the screws A 9 Turn the handwheel toward you t...

Page 20: ...backward feeding against 10 stitches in the left side row forward feeding is considered acceptable Adjustment procedure 1 Confirm the stitches by sewing buttonholes and remove the cap 2 Turn the adjusting screw in the direction of C in case of A right stitches are rough or in the direction of D in case of B left stitches are rough 3 Mount the cap A B Forward feeding Backward feeding Adjusting scre...

Page 21: ...eeding and backward feeding during stretch stitch patterns mare an adjustment as follows Adjustment procedure 1 Remove the cap 2 Set the pattern selector dial at and the stitch length dial at S S 3 Turn the stretch stitch adjusting screw in the direction of C when A B or in the direction of D when A B 4 Attach the cap D C Stretch stitch adjusting screw A B A B A B Cap Notch A A 1 2 3 B A A 1 2 3 B...

Page 22: ... pattern selector dial at and the stitch length dial at 4 2 Remove the front cover See page 6 3 Place a piece of paper under the foot and turn the handwheel If the paper is feed forward turn the adjusting screw in the direction of C If the paper is feed backward turn the adjusting screw in the direction of D 4 Attach the front cover Adjusting screw D C Backward feeding Forward feeding Stitch lengt...

Page 23: ...vex of the zigzag cam 4 Loosen the setscrew 5 Push the convex part of the cam follower releasing arm in the direction of arrow until the cam follower releasing arm touches to position A of the pattern select cam and then tighten the setscrew NOTE After this adjustment check that the clearance between the zigzag cam and the cam follower is 0 3mm when the cam follower releasing arm has removed to po...

Page 24: ...elt tension may cause jumping of the belt teeth on the motor pulley 2 The correct motor belt tension is that the deflection of motor belt is about 7mm 0 28 9mm 0 36 when pushing the motor belt by finger at about 300 grams load Adjustment procedure 1 Remove the belt cover See page 4 2 Loosen the screws A and B 3 Move the motor up or down to adjust the deflection about 7mm 0 28 9mm 0 36 4 Tighten th...

Page 25: ...23 MODEL BL9 From lamp socket From motor WIRING ...