JUKI MH-486-5, Инструкция по эксплуатации

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.10..ADJUSTING.THE.STITCH.LENGTH
Turn feed regulator dial
1
counterclockwise or clockwise and align the desired
number with the pin protruding from the arm.
The numbers on the dial indicate millimeters. When reducing the indication turn
the feed regulator dial while depressing reverse feed control lever
2
.
★
.Reverse.stitching
1. Depress reverse feed control lever
2
.
2. Reverse stitching is possible while the lever is depressed.
3. When the lever is released, the sewing direction will return to normal.
★
.Lever.stopper
1. When lever stopper
3
is set in a high position, a small reverse feed stitch
length will result.
2. When feed lever
2
is depressed after setting the lever stopper in a higher
position, the forward feed stitch length will be reduced.
Perform the above adjustment for sewing start or for stopping stitch at sew-
ing end.
(Caution). This.function.is.not.applicable.to.thread.trimming.in.the.case.
of.reverse.feed.stitching.
★
.Adjusting.the.needle.thread.tension
When needle thread tension nut
1
is turned clockwise the tension of
the needle thread increases.
When it is turned counterclockwise the tension decreases.
★
.Adjusting.the.looper.thread.tension
When looper thread tension nut
2
is turned clockwise the tension of
the looper thread increases.
When it is turned counterclockwise the tension decreases.
.11..THREAD.TENSION
.12..ADJUSTING.THE.REMAINING.LENGTH.OF.TRIMMED.THREAD
The length of the thread remaining on the needle after thread trimming
significantly affects the occurrence of stitch skipping at the beginning
of sewing.
Loosen setscrew
1
and move wire drawing link
2
of the needle
thread draw-out solenoid to the left to increase the thread take-up
amount of draw-out pin
3
. This increases the length of thread remain-
ing at the bottom of the needle eyelet. On the contrary, moving the link
to the right decreases it.
Reduce the length of thread remaining on the needle after thread
trimming when using elastic thread such as Tetoron thread and nylon
thread.
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.
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.
– 7 –
.13..HAND.LIFTER
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.
.14..ADJUSTING.PRESSURE.OF.THE.PRESSER.FOOT
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).
.15..NEEDLE-TO-LOOPER.RELATION
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.
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.