JUKI MF-7200D/U45, Instruction Manual

Page: 60 / 260

– 19 –
4. Adjusting the speed of moving knife
Stroke of ar cylnder
1
s 20 mm.
Speed of the movng knfe can be changed wth
speed controllers
2
and
3
.
1) When you desre to change the protrudng speed
of movng knfe, loosen the nut of speed control-
ler
2
and turn the adjustment screw.
When you desre to change the returnng speed
of movng knfe, loosen the nut of speed control-
ler
3
and turn the adjustment screw.
2) After the adjustment, tghten the nuts of speed
controllers
2
and
3
.
1
2
3
• When the protruding speed of moving knife
is slow, thread trimming failure will be
caused.
• When the returning speed of moving knife
is fast, needle thread clamp failure will be
caused.
– 20 –
ENGLISH
1. Adjusting the engagement of knife
1) Adjust so that the engagement of fixed knife
1
wth movng knfe
2
s 0.5 mm.
2) When adjustng the engagement, loosen set-
screw
4
and adjust lever
8
.
2. Adjusting the moving knife stroke
1) Adjust so that the stroke of movng knfe s 18
mm.
2) Loosen nut
5
, adjust screw for the stopper
!3
,
and adjust the stroke of movng knfe
2
.
3. Adjusting the pressure of clamp spring
1) Top coverng thread s held wth clamp sprng
3
after thread trmmng.
2) Holdng pressure can be adjusted by loosenng
nut
6
and turnng screw
7
.
3) Holdng pressure s ncreased when tghtenng
screw
7
and t s decreased when loosenng
screw
7
.
4) After the adjustment, tghten nut
6
.
5) Make the holdng pressure as low as possble
wthn the range of holdng the top coverng
thread.
4. Adjusting the position of the blade
point of moving knife
1) Brng the needle bar to ts hghest poston.
2) When lever
8
s lowered, movng knfe
2
lowers
together.
3) Adjust the movng knfe to the poston where the
hook secton of movng knfe
2
enters the con-
cave of the bottom surface of spreader
9
and
catches the top coverng thread n the state that
movng knfe
2
s fully lowered. After the adjust-
ment, tghten screws
!0 !1
and
!2
.
4) Screw
!0
s for adjustng the lateral poston of
knfe, screw
!1
for adjustng the angle of knfe,
and screw
!2
for adjustng the vertcal poston of
knfe.
Make sure that the moving knife does not
interfere with other components such as
presser, needle, spreader, etc. within the
working range of moving knife
2
.
Perform the adjustment of the stroke of moving
knife after adjusting the engagement of the
knives.
0.5 mm
1
2
3
4
5
8
!1
!0
!3
18 mm
6
,
7
(
. ADJUSTING THE TOP COVERING THREAD TRIMMER MECHANISM (UT42)
Top covering thread
9
!2
2
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.