A Adjustment Of Forward/Backward Stitch Length; B Manual Presser Bar Lifter; C Adjustment Of The Knee Lifter Operating Force - JUKI LY3-6840-B0T Instruction Manual

HOW TO USE
A Adjustment of forward/
backward stitch length
1 . Loosen four set screws Ⓐ.
2 . Turn the stitch length adjusting pin until the
desired length is reached as follows:
( 1 ) Clockwise: Increases the stitch length in
forward sewing, and decreases the stitch
length in back sewing.
( 2 ) Counterclockwise: Decreases the stitch
length in forward sewing, and increases the
stitch length in back sewing.
B Manual Presser bar lifter
1 . Turn the presser bar lifter in the direction of
the arrow. This raises the presser foot.
C Adjustment of the knee lifter
operating force
1 . Loosen the nut Ⓐ on the presser drive arm.
2 . Adjust the position or the roller.
( 1 ) If P is lengthened, the knee lifter
operating force will become heavier, but the
knee lifter operating amount will decrease.
( 2 ) If P is shortened, the knee lifter operating
force will lighten, but the knee lifter
operating amount will increase.
Note: P is set to the maximum as the
default state.
Set screw Ⓐ
— 9 —
Bracket Stitch length adjusting pin
Presser bar lifter
P
Nut Ⓐ