Uneven Seams Of Reverse Patterns; Breaking Of Upper Thread; Breaking Of Lower Thread - Brother VX Series Service Manual

T R O U B L E A N D CAUSE

13. UNEVEN SEAMS OF REVERSE PATTERNS

( 1
Improper setting o f reverse feed devices
14. BREAKING OF UPPER T H R E A D
( 1 ) Incorrect relation o f needle
( 2 ) Bent or b l u n t needle
( 3 ) Inferior needle eye
( 4 ) Incorrect threading
Inferior needle slot o f needle plate
( 6 ) Upper thread tension t o o tight
( 7 )
Scratch on the shuttle hook
15. BREAKING LOWER T H R E A D
( 1 N o t smooth running o f bobbin
Refer t o :
I N S T R U C T I O N BOOK or:
thread Relative chart
Change the needle
Change the needle
Upper threading
Change needle plate
Thread tension
Change the shuttle hook
Change the bobbin
Change the spring
Change the shuttle hook
Thread tension
C O R R E C T I O N
Refer t o : SERVICE M A N U A L ( I t e m No.)
following models
9-1
10-1 10-2