Hand.lifter; Adjusting.pressure.of.the.presser.foot; Needle-To-Looper.relation - JUKI MH-486-5 Instruction Manual

. 1 3..HAND.LIFTER

. 1 4..ADJUSTING.PRESSURE.OF.THE.PRESSER.FOOT

. 1 5..NEEDLE-TO-LOOPER.RELATION

WARNING.:
To.avoid.possible.personal.injury.due.to.abrupt.start.of.the.machine,.turn.off.the.power.to.the.machine.and.check.to.be.sure.that.the.
motor.has.totally.stopped.rotating.in.prior.
Adjust.the.needle.and.the.looper.as.described.below:
1. Turn the handwheel to bring the needle bar to the lowest position of its stroke. Loosen needle bar connection setscrew 1 .
(Determining.the.needle.bar.height)
2. Align first (uppermost) marker line A on needle bar 2 with the bottom end face of needle bar lower bushing 3 . Tighten needle bar connec-
tion setscrew 1 .
(Determining.the.looper.position)
3. Loosen gear setscrew 5 to adjust so that looper 4 reaches its back end when the needle bar is at the lower point of its stroke.
4. Carry out adjustment so that the blade point of looper 4 aligns with the center of the needle, so that the former is spaced 1.5 mm from the
upper end of needle eyelet and so that a clearance of 0.05 mm is provided between the looper and the needle when second marker line B on
needle bar 2 is aligned with the bottom end of needle bar lower bushing 3 .
5. Loosen looper setscrew 6 and looper clamping screw 7 and carry out the adjustment.
6. Check to be sure that a distance of approximately 3.2 mm is provided between the center of the needle and the blade point of the looper when
the looper reaches its back end.
In order to stop the presser foot in the raised position, turn hand lifter 1 clockwise. The presser foot will
stop after rising about 5.5 mm. It can be lowered to its original position by lowering the hand lifter. When
using the knee lifter, the presser foot will rise about 7 mm.
When nut 2 is loosened and presser spring regulator 1 is turned clockwise the pressure increases. When
it is turned counterclockwise the pressure decreases.
Tighten nut 2 after adjustment.
In the case of general fabrics the standard height of the pressure adjusting screw is 30 mm (6 kg).
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