~~I
1-NEEDLE, BOTTOM FEED, LONG CYLINDER BED, LOCKSTITCH MACHINE FOR
EXTRA
SHU
HEAVY-WEIGHT
TILE
MATERIALS
WITH A SEMI-ROTARY
LARGE-CAPACITY
TSH-411
1-NEEDLE, TOP & BOTTOM FEED, LONG CYLINDER BED, LOCKSTITCH MACHINE
FOR
EXTRA HEAVY-WEIGHT MATERIALS WITH A SEMI-ROTARY LARGE-CAPACITY
TILE
SHU
TSU-471
ENGINEER'S MANUAL
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29338100
No.OO
PREFACE
This Engineer's Manual is written for the technical personnel who are responsible for the service and maintenance
the sewing machine. This manual describes "Adjustment Procedure", "Results
functions which are not covered by the
at
a sewing factory.
All personnel engaged
which contains important information on the maintenance
The
"Standard Adjustment" consists
the convenience
this manual once; and the latter part provides "Results
failures,
It is advisable to use "TSH-411 and TSU-471 Parts Book" together with this Engineer's Manual.
and the correcting procedures are explained for those persons who perform such adjustment for the first time.
in
repair
of
reconfirmation
of
Instruction Book intended for the maintenance personnel and sewing operators
TSH-411 and TSU-471 are required to carefully read Section 2 "Standard Adjustment"
of
TSH-411 and TSU-471.
of
two parts; the former part presents illustration and simplified explanation for
of
the required adjustment values in carrying out actual adjustment after reading
of
Improper Adjustment" in which sewing and/or mechanical
of
Improper Adjustment", and other
of
CONTENTS
1. SPECIFICATIONS ......................••.•.......•.......••••...•.•.........••......••....................... 1
ADJUSTMENTS •...•........................•.•.••••............................................•.............. 2
2.
(1) The position
(2) Needle-to-shuttle timing
(3)
Height
(4)
Clearance between the needle and the shuttle ............................................................. 4
(5)
Clearance between the needle and the shuttle driver .................................................. 4
(6) Height
(7)
Longitudinal position
(8)
Feed
(9)
Movement
1) Longitudinal position
2) The amount
3) Operating height
4) Feed amount
5) Top feed timing ....................................................................................................................................... 14
of
of
timing
of
the shuttle when
it
is recessed
most
.......••...•.........•.........••......•...•..... 2
......•.•••....•...•....•..•..•......................•............................................ 2
the needle bar ......................................•................................................•.......... 2
the feed dog •...•••.•••..•..........••......•.•...................................................•.............. 6
of
the feed dog ......•.................................................................... 8
..................................................•.................................................................... 8
of
the walking
of
of
alternating vertical movement
of
the walking foot and the presser foot ...................................................................... 12
of
the walking foot ............................................................................................................ 12
foot
(This item
the walking foot. ................................................................................................ 10
is
applied only
of
the walking foot and the presser foot ......................... 10
to
the
TSU-471.) .............
10
3. PARTS WHERE ANAEROBIC ADHESIVE (LOCK-TITE) IS USED .............. 16
4. SELECTIVE CONNECTED PARTS LIST ....................................................... 17
5.
CONSUMABLE PARTS LIST •.•••..•...........................................••..••••••••.•........ 17
6. OPTIONAL PARTS .......••.•••••••••..••.......•.•••.••......•••...••.•.....•••••.••••••......•..........• 17
PROBLEMS WITH SEWING AND CORRECTIVE MEASURES .................... 18
7.
DRAWING OF THE TABLE .....•.••.•......................................................•.••••..... 19
8.
1. SPECIFICATIONS
No.
1
Model
Name
2
3
4
5
6 Range
7
8
9 Lift
10
11
12
13
14
15
16
17
18
19 Lubrication
20 Lubricating oil
21
22 Free space for sewing
23
24
25 Belt
of
Application Tents, bags, shoes, bag handles, safety belts, etc.
Sewing speed
Needle
Range
Stitch length
of
presser foot
Stitch
adjusting method
Reverse feed stitching method
Thread take-up lever
Needle bar stroke
Alternate foot stroke
Shuttle
Feed mechanism
Top feed mechanism
Shuttle driving shaft drive method
Bobbin winder
Bed size
Motor
Item Specifications
TSH-411
machine
of
needle size
of
count
of
thread
1-needle, bottom feed,
bed,
lockstitch
heavy-weight materials with a semirotary large-capacity shuttle
Lever
Rocking method
Driving method
long cylinder 1-needle, top and bottom feed, long
machine
nut
for
Nm
11
Max.
mm
by hand
12
type (feed connecting link fulcrum moving method)
Cam type thread take-up lever
4
mm
Semi-rotary large-capacity shuttle
of
feed connecting link by feed eccentric cam
Bottom feed interlocking method
of
oscillating rock shaft by connecting rod eccentric cam
New
4P,
extra
mm
to 8 mm (TSU-471 only)
180 mm x 420 mm
253 mm x 656 mm
cylinder bed, lockstitch machine for
extra heavy-weight materials with a
semi-rotary large-capacity shuttle
800 rpm
Max.
SCHMETZ794
= 130
to
Nm = 280
#00 to #8
{normal/reverse feed)
lifter/20
By lever
56mm
Manual
Defrix Oil No. 1
Built-in type
400W clutch motor
M type V-belt
mm
by
TSU-471
pedal
-1-
2. ADJUSTMENTS
(1)
The position
(2)
Needle-to-shuttle timing
of
the shuttle when
Blade point
of
shuttle
Standard Adjustment
it
is recessed most
Condition
• When the shuttle turns counterclockwise
until
should come in contact with point A.
Needle
/ SCHMETZ 794-Nm 230
it
will
go
no
further,
the
shuttle
Lowest position
needle bar
Condition
• When the blade point
with the center
the shuttle
the
shuttle
rising from its lowest position.
(3)
Height
of
is
counterclockwise pressed
driver
of
the needle bar
of
of
the shuttle is aligned
the needle on condition that
while
\
the
[Reference value
Distance A from the upper surface
end
to
TSH-411 : 26.9
needle
bar
is
TSU-471 : 26.4
Distance from the top end
the needle eyelet
point
of
the shuttle
_j'"--"-A
f
Smm
of
the lowest position
of
the needle
to
the blade
Condition
• When the blade point
center
counterclockwise pressed
needle
bar
mm
mm
of
---~~
of
the needle
bar
is rising from its lowest position.
of
the needle bar stroke]
of
the throat plate
{ TSH-411
TSU-471 : 2.5
of
the shuttle
on
condition
to
:2
mm
mm
is
aligned with the
that
the shuttle driver while the
the
to
the lower
shuttle
is
-2-
Adjustment Procedures
Results
of
Improper Adjustment
1. Tum and stop the handwheel at the position where the shuttle
turns counterclockwise until it will go no further.
2.
Loosen the shuttle driving shaft crank screw.
3.
Turn the shuttle
point
of
the shuttle. Then, fix the shuttle .
by
hnd to adjust the position
. .
. .
.
.
of
the blade
: :
::
r~!
\.
::
!~·-·
l
~~~~iving
shaft crank screw
1. Loosen two setscrews (B) in the connecting rod eccentric
cam and setscrew (A)
2. Turn the connecting rod eccentric cam to adjust the
amount
value) Align the marker dot engraved on the connecting rod
eccentric cam with the marker
3.
Turn the handwheel toward you, and check the lifting amount
of the
(Caution) Tighten
of
the needle bar and tighten setscrew (A). (Reference
needle bar. Then, securely tighten two setscrews (B).
180
to
200 kgfcm.
in
the
screws with
the connecting rod eccentric cam.
lifting
line engraved on the main shaft.
the
tightening torque
of
0 Stitch skipping
will occur.
or
thread breakage
0 Stitch skipping or thread breakage
will occur.
Setscrew (A) in connecting rod
Connecting rod eccentric cam
Setscrews (B) in connecting .
eccentric cam
Engraved marker
rod eccentric cam Marker hne
dot
engrave~
on main shaft
~
~~~0
1. Turn and stop the handwheel at the position where the blade
point
of
the shuttle is aligned with the center
while
the needle bar is rising from its lowest position.
2.
Loosen two setscrews
3.
Move the needle bar up and down to adjust the height. Then,
fix it.
in
the needle bar connection.
0
of
the needle
0 Stitch skipping
will occur.
or
thread breakage
Setscrew in needle bar
connection
-3-
Standard Adjustment
(4)
Clearance between the needle and the shuttle
0.25
to
I.
(5)
Clearance between the needle and the shuttle driver
0.35 mm
Condition
• When the blade point
of
the needle while the needle bar is rising from its lowest
position.
(Position as shown in the illustraion
ofthe
shuttle is aligned with the center
of
item (3) on page 2)
Shuttle driver
0 to 0.05
mm
Condition
• When the convex section
with the needle guard section
of
the needle is aligned
of
the shuttle driver.
-4-
Adjustment Procedures
Results
of
Improper Adjustment
Adjust the clearance between the needle and the shuttle by
replacing the shuttle race back. The shuttle race back comes
six different thickness
To
replace the shuttle race
1.
Remove two setscrews
in
addition to the standard thickness.
back:
in
the shuttle race, remove the shuttle
in
race, and remove the shuttle.
2.
Turn the handwheel until the shuttle driver is brought to the
position where the
shuttle race back comes off as shown
in
the illustration. Then, replace the shuttle race back.
Shuttle driver
Setscrews In shuttle race
1. Loosen two setscrews, and remove the thrust collar
of
the
feed bar driving shaft.
2.
Loosen two setscrews, and move the thrust collar
of
the feed
rocker shaft.
3.
Loosen two setscrews in the shuttle driving shaft thrust collar,
setscrew in the shuttle driving shaft front bushing and screw
in
the shuttle driving shaft crank.
4. Adjust the
bushing to the
5.
After the adjustment has been completed, fix the shuttle driving
shaft thrust
clearance by moving the shuttle driving shaft front
left and right.
collar, making sure that there is no axial play
of
the shuttle driving shaft. Then, fix the shuttle driving shaft
crank.
6.
Finally, secure the respective thrust collars, making sure that
there is no
play in the feed rocker shaft and the feed bar
driving shaft.
0 If the clearance is excessively small,
needle
each other. As a
the both will result.
and hook will interfere with
result, damage
of
0 If the clearance is excessively large,
stitch skipping
will result.
or
thread breakage
0 If the clearance is excessively small
and shuttle driver presses needle,
stitch skipping or thread breakage
will result.
0 If the clearance is excessively large,
needle
each other. As a
the both will result.
and hook will interfere with
result, damage
of
Thrust collar
rocker shaft
Thrust collar
bar
driving shaft
Shuttle driving shaft
front
bushing Setscrew In shuttle driving
of
feed
Setscrew /
of
shaft
Setscrew
feed driving shaft crank
front
In
shuttle
Setscrew in shuttle driving shaft thrust collar
bushing
-5-
[The standard
Standard Adjustment
for
adjusting the clearance between the needle and the blade
point
of
the shuttle]
(6) Height
Needle
SCHMETZ794
Clearance :
of
the feed dog
"0"
<%)
®
Minimum
clearance
Conditions
• Maximum stitch length feed
• Needle bar
at
its
upper dead point
(11
mm)
-6-
Adjustment Procedures
Use a standard SCHMETZ 794-Nm230 needle.
CD
Turn and stop the handwheel at the position where the convex
section
shuttle driver, and adjust the clearance between them to "0".
Tum and stop the handwheel at the position where the blade
@
point
needle bar is going up from its lowest position, and press the
needle against the needle guard section
®
In
sure that the
point
* By this adjustment, the clearance between the needle and
the
of
needle is aligned with the needle guard section
of
shuttle is aligned with the center
the state
blade point
of
shuttle.
of@,
adjust the clearance to a minimum, making
needle does not come in contact with the blade
of
the shuttle will be 0.25 to 0.35 mm.
of
needle while the
of
shuttle driver.
of
Results
of
Improper Adjustment
1.
Remove two setscrews in the shuttle race to remove the
shuttle race, and remove the shuttle.
2.
Turn the handwheel to move the shuttle driver to the position
where the setscrew in the feed dog can be observed.
3.
Loosen the setscrew
the feed dog by moving the feed dog
4. After the adjustment,
dog.
in
the feed dog, and adjust the height
up
or down.
firmly tighten the setscrew in the feed
Setscrew in
feed dog Feed dog
Setscrew in
shuttle race
0 When the height is high, the feed
in
dog comes
plate. In addition, damage
sewing product
0 When the height is low, the feed dog
of
comes in contact with the shuttle
race and the shuttle race back.
addition,
deteriorated.
contact with the throat
will result.
the
feed
force
of
will
the
In
be
-7-
(7)
Longitudinal position
of
the feed dog
Standard Adjustment
Condition
• Maximum stitch length
(11
mm)
(8) Feed
timing
Feed eccentric cam
0
0
1)1JI11J
0
VNeedle
I
~
~'
Feed dog
Feeding motion starts at the same time when the
descending from
Its highest dead point.
-8-
needle
bar
starts
Adjustment
Procedures
Results
of
Improper
Adjustment
1. Maximize the stitch length
2.
Loosen two setscrews
3.
Move the feed dog to the right and left to adjust so that the
longitudinal clearance between the window
plate and the feed dog is equal when the feed dog moves,
and fix the feed dog.
(11
mm).
in
the feed rock shaft crank.
hole
of
the throat
0
Setscrews in feed
rock shaft crank
Feed dog
0 The feed dog comes in contact with
the throat
will occur.
plate and contact noise
1.
Loosen two setscrews in the feed eccentric cam.
2.
Turn the feed eccentric cam to adjust the timing and fix the
cam.
(Standard)
of
Align the marker line engraved on the side plate
eccentric cam with the marker line engraved
to obtain the standard timing.
Marker
Marker line engraved
on main shaft
line engraved on side plate
feed eccentric cam
on
the feed
the main shaft
of
0
Stitch
. graduations on the feed lever will
change.
In addition, stitch length
and
change.
length
reverse
in
feed
terms
of
stitches
of
normal
0 Irregular stitches will occur.
the
will
-9-
Standard Adjustment
(9) Movement
1)
Longitudinal position
0
of
the
walking
of
the walking
foot
2mm
(This item
foot
is
applied
Conditions
• Maximum stitch length
• When walking
presser foot.
only
to
foot
the
TSU-471.)
(11
is
most
mm)
close
to
2)
The amount
of
alternating vertical movement
of
the walking
foot
and the presser
Amount
vertical
foot
of
alternating
movement
-10-
Adjustment
1.
Maximize the stitch length
2.
Lower the presser foot
handwheel at the position where the walking foot is most close
to the presser foot.
3.
Loosen the screw in the center shaft rear arm.
4.
Move the walking foot to adjust the clearance and fix it.
Procedures
(11
mm).
on
the throat plate, turn and stop the
Screw in center
shaft rear ann
Results
0
If
specified
comes in contact with the presser
foot and contact noise
of
Improper
the clearance is smaller than the
value, the walking foot
Adjustment
will occur.
0 If the clearance is larger than the
specified
terms
lever will change.
value,
of
the graduations
stitch
length in
on
the feed
1.
Bring the needle bar to the lowest position
lower the presser foot.
2.
Loosen the screw in the walking foot arm (front).
3.
Move the walking foot arm (front) :
• In the direction
• In the direction
Screw in walking
Walking
of
of
foot
ann (front)
foot
arm
(front)
(A) and fix
(B) and fix
it-+
arrountofrrovementofthe
presser foot
it-+
arrountofrrovementofthe
presser foot is
of
its stroke. Then,
is
decreased.
increased.
0 It is effective when the amount
movement
slightly increased according to the
sewing product.
(Sponge, excessive height difference
at stepped section, etc.)
0 When
vertical
foot and that
excessively
other, stitch
graduations on the feed
change.
of
the walking foot is
the
amount
movement
of
the presser foot are
different
length in terms
of
alternating
of
the walking
from
lever will
each
of
of
the
-11-
3)
Operating height
4)
Feed amount
of
the walking
Standard
• Fix the walking
of
the walking foot
Standard Adjustment
foot
and the presser
foot
rod to the top
of
the
foot
slot
in the walking
Operating height
foot
arm (rear).
Top feed
Bottom feed
Feed amount
Standard
• Bottom feed amount versus top feed amount is 1 : 1.
-12-
Adjustment
1.
Loosen the hinge screw
2.
Fix the walking foot
• to the bottom (A)
-4
operating height is maximized
• to the top (B)
-4
operating height is minimized
Walking
Hinge screw in
1.
Raise the hand lifter lever.
2.
Loosen the top feed adjusting lever.
3.
Tum the top feed adjustment screw:
-1. Tum clockwise
-2. Tum counterclockwise
foot
of
arm (rear)
walking
foot
rod
-4
the slot
Procedures
in
the walking foot rod.
rod
:
of
the slot
top feed amount
in
the walking foot arm (rear}
in
the walking foot arm (rear)
-4
top feed amount is increased.
(8
mm).
(4
mm).
is
decreased.
© Align the outer diameter of the top feed adjusting roller
shaft
with the marker
adjusting base
amount is 1 :
4.
After the adjustment, tighten the top feed adjusting lever to
fix.
Top feed adjustment
-4
1.
dot
engraved on the top feed
bottom feed amount versus top feed
Results
of
Improper
Adjustment
0 It is effective when the operating
height
is
increased according to the
sewing product.
(Sponge,
difference at stepped section, etc.)
0
When
excessively high, stitch length in
terms ofthe graduations
lever will change.
3-1
When the top feed adjusting roller
shaft is at the top position :
excessive
the
operating
Upper fabric
bent in the direction
arrow.
is
height
height
on
fed less and
the
feed
of
is
the
u
Slippage
3-2 When the top feed adjusting roller
shaft is at the bottom position :
Top feed adjusting
roller shaft
dot
Marker
feed adjusting base
Top feed adjusting
engraved on
top
lever
-13-
Upper fabric is fed more and
bent in the direction
arrow.
of
the
Slippage
r1
5)
Top feed timing
Standard
--------------~----+-~-----------
Adjustment
Needle
Top surface
of
throat plate
Tip
of
needle
presser
throat plate.
foot
is
aligned with the top surface
come down.
At
the same time, the preser
of
throat plate when the needle as well as the
foot
is
aligned with the
top
surface
of
-14-
Adjustment
1.
Loosen two setscrews
2.
Tum the top
(Standard)
Adjust so that setscrew
the needle bar is in the upper dead point
feed
cam
Top feed cam
Procedures
in
the top feed
to
adjust the timing and fix
No.2
faces exactly sideways when
cam.
of
it.
its stroke.
Results
When
advanced:
the
of
Improper
timing
is
0 Thread tightening is
deteriorated.
0 Stitch length in terms
of the graduations
the
feed
lever
change. (Stitch length
is decreased.)
on
will
0 Reverse feed motion
is
applied
walking foot.
to
the
Adjustment
excessively
Setscrew No. 2
When
retarded:
the
timing
is
0 Thread tightening is
deteriorated.
0 Stitch length
of the graduations
the
feed
change. (Stitch length
is increased.)
in
lever
terms
on
will
excessively
-15-
3. PARTS WHERE ANAEROBIC ADHESIVE (LOCK-TITE) IS USED
Needle bar shaft nut
crank shaft
Needle bar crank
~
~-~It
LOCK-TITE
Hand lifter cam
Hook
cover
use.~
~
Needle bar
crank seat (B)
thrust
collar
LOCK·TITE
used
Hand lifter lever R d
LOCK·TITE
~
used
,
i
Hook cover
setscrew
LOCK-TITE used
Rod
---·~
~
-
LO~K-TIT
used
~
•
h.
o mge screw
{TSU-471
Driving shaft
LOCK·TITE
used
Hinge screw
only)
{TSU-471
Feed eccentric cam
sid~e
plate etscrew
~Roller
Roller
guide~
•
Tn~ngle
{TSU-471
Top feed rod hinge screw
~:CK-TI~
lever used Presser bar
hange
screw guide bracket
only)
~_1-J
J;l~~sed
LOCK-TITE
used
only) LOCK·TITE used
~
~~
OCK·TITE
Feed used
eccentric
cam
~-
Top feed
{TSU-471
link
only)
Top feed link B
LOCK·TITE
used
B hinge screw
ar?-·
Triangle lever
hinge screw
{TSU-471
Feed connecting link
·~lnge
follower
only)
screw A nut
-~
Feed rock
{TSH-411
Lifting link
;~a~:ecting
shaft
only)
S:type metal fitting
k hongescrew
0
0
.:.~---i
5
metal ) I
fitting LOCK-TITE used
Parts shown in the illustration above are fixed by LOCK-TITE.
When
these
parts are disassembled, be sure
connected section using a paint thinner, remove any moisture 1
from the mating faces, and re-assemble it using LOCK-TIT
If it is hard to remove a screw which has been fixed using LOCK-
heat it using a torch lamp to help remove the screw.
TITE,
(Caution)
It
is advisable
possible.
Feed connecting
crank rod hinge screw
~-
Roller shaft
nut
not
to
disassemble these parts
Hook driving
shaft crank
k.Siide
~-~
Feed regulator
block stud
LOCK-TITE used
to
wash
the
E.
if
LOCK-TITE
0~
Feed7
connecting
link
hinge
screwB
LOCK·TITE
used
~~:~i~~e
screw
..
-16-
4. SELECTIVE CONNECTED PARTS LIST
Part
10519502
21046107
21046206
21155007
21155106
21155205
21155304
21155403
21155502
21155601
No.
Thread take-up lever roller
Thread take-up lever roller
Thread take-up lever roller (Outer diameter
Shuttle
Shuttle
Shuttle
Shuttle
Shuttle
Shuttle
Shuttle
Name
of part
race
back
(1)
race
back
(2)
race
back
(3)
race
back (4)
race
back (5)
race
back (6)
race
back (7) (Thickness
5. CONSUMABLE PARTS LIST
Part
No.
MC532002300
21041850 Shuttle (asm.)
21057401
21059605 Thread take-up spring A
21059704 Thread take-up spring B
Needle
Bobbin
Name of part Remarks
(794Nm =
230)
Remarks
Standard (Outer diameter
(Outer
diameter
(Thickness 2.9
(Thickness
(Thickness
Standard (Thickness
(Thickness
(Thickness
11.1
11.1:g:~mm)
_g.o3mm
3.1
_g.o3mm
3.3
_g.o3mm
3.5.g.o3mm
3.7
~.o3mm
3.9
~.o3mm
4.1
!.o3mm
11.1
~.ooamm
~:~~
mm
)
)
)
)
)
)
)
)
)
6. OPTIONAL PARTS
Part
No.
21064605 Detector support
NS6150430SSP Detector support
GAK720000AO
GAK720000BO
21150404 Throat plate (short)
21170303
21166103 Presser bar connecting foot
21166202
SS8660512TP
21164058 Eye guard kit
Air-type auto-lifter AK-72A
Air-type auto-lifter AK-728
Feed
Presser bar for connecting foot
Presser bar connecting foot screw
Name of part
dog
(herringbone)
arm
arm
nut
Remarks
Knee
switch type
Pedal kick-back type
ForTSH-411
TSH-411
For
TSH-411
For
TSH-411
For
-17-
7. PROBLEMS WITH SEWING AND CORRECTIVE MEASURES
Problem
1.
Thread often breaks, thread splits
finely,
or
correct stitch
(half-finished stitch).
formed
cannot
2. Stitches are offten skipped.
Cause
G)
Flaw is found out at thread path, needle point,
be
shuttle blade point,
or
needle
eyelet
@ Improper finish around the recess in the needle
@ Excessively tightened needle thread tension
® The needle interferes with the blade point
shuttle.
® The timing
early or too
@
Due to heat generated by the needle
0 Excessive height difference
(J)
The needle-to-shuttle blade point clearance is
excessive.
@ The timing
early or too
@ The presser foot pressure is insufficient.
of
the needle and the shuttle is too
slow.
at
stepped section
of
the needle and the shuttle is too
slow.
0 Remove flaw by smoothing flaw with fine paper
file.
0 Replace the needle with a new one.
0 Adjust the needle thread tension.
0 Refer to "(4) Clearance between the needle and
of
the
the
0 Refer to "(2) Needle-to-shuttle timing • on page
2.
0 Decrease the sewing speed
silicone oil.
0 Increase the amount
take-up spring.
0 Refer to "(4) Clearance between the needle and
the
0 Refer to ·(2) Needle-to-shuttle timing· on page
2.
0 Tighten the presser adjuster screw.
Corrective measures
shuttle" on page 4.
shuttle" on page 4.
of
movement
of
the machine. Use
of
the thread
® The distance from the upper end
eyelet
to the blade point
proper.
® The needle is improperly selected. 0 Replace the needle with a
The amount
@
spring is excessive. take-up spring.
0 Overheated needle
pulled smoothly.
of
movement
or
shuttle,
of
of
of
the needle 0 Refer to "(3) Height
the
shuttle
is
not
2.
the thread take-up 0 Decrease the amount of movement
or
thread is not 0 Use silicone oil.
needle.
of
the needle bar" on page
one-count
of
the thread
® Reverse feed stitching is made at low speed on 0 Wind the needle thread around the needle.
light-weight material
3. Improper thread tension, irregular
stitch, or excessive bobbin thread foot, in the
tension thread guides is
G)
The thread path
@ The bobbin slides unsmoothly. 0 Replace the bobbin
@
Weak bobbin thread tension 0 Adjust the bobbin thread tension.
® Bobbin thread is wound too tightly. 0
using nylon thread.
in
the
needle hole
needle hole
poorly finished.
of
of
the presser 0 Smooth the surface with a fine paper file
the
feed dog,
or
of
a buff.
Decrease
winder.
the
tension
or
the shuttle.
of
the
bobbin
® Needle thread flaps. (Needle thread flaps and 0 Thread the tension guide bar as illustrated below.
comes
out
of
the thread
excessive
(Needle thread flaps too much and is caught in
other parts.)
needle thread tension.)
tension
disk
due
to
To the needle
thread tensioner
@Too
thin bobbin thread is used to combine with 0 Use silicone oil.
thread.
needle
4. Poor gloss
5.
lnconsisyently
(stitches are
made such
6.
Bobbin
increased. has become dusty
7.
The belt slips.
(Motor
electronic-stop motor is used.) @ The V belt tension is not enough. 0 Adjust the slack amount in the V belt to 10 mm/1
of
the needle thread 0 Excessive height difference
finished
not
made straight but Use the cutting point needle.
as"~".)
thread tension
stoppage
cannot
occurs,
seam
0 Needle is too thick. 0 Replace the needle with a thinner one.
be 0 The bobbin thread tension spring
CD
if
The V belt is degraded. 0 When degradation is found out to the V belt, such
an
at
stepped section 0 Use silicone oil.
of
or
dirty. spring.
the shuttle 0 Clean by removing
as wear, cracking, etc., replace with a new one.
f.
kg
I
_J....._
~
the
bobbin thread tension
I
Handwheel
thicker
or
using
thread
-18-
•,
-
1-
Motor pulley
...lo.
<0
!»
c
18 drilled
35
drilled
hole
4:-""
Top surface
4-1
0.5
drilled
hole
3-8.5 drilled
+---
an
cQ
II)
(")
II)
co
I
G'l
....
c
(")
I
I
I
I
~----~[
------+
_____ t __
It)
N
c.;
(")
I
I
"I
....
~"?~
~/i
-~-----------~-
• I
I
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co
,.....
(")
N
c
~
c
an
....
~
z
C)
0
-n
-1
::E:
m
-1
)>
ltD
r
m
164
JUKIIogotype
40 I 54
730
(by a block copy supplied
159
by
JUKI)
JUKI
CORPORATION
INTERNATION
8·2·1, KOKUR
HO
C
PHONE :
FAX : (81)3-3430-4909 • 4914 • 4984
TELEX : J22967
Copyright (C) 1999 JUKI CORPORATION.
All
rights reserved throughout the world.
AL
SALES H.Q.
YO
FU-SHI, TOKYO 182-8655, JAPAN
-CHO,
(81
)3-3430-4001 to 4005
Plea
se
do not hes1tate
*
The desc
commodity w
to contact our distnbutors
ription
cov
ered
ithout
notice.
in this e
or
ngineer's
agents in your area for furth
manual
is s
ubject
er
information when necessary.
to
change
for
improvement
99 · 08 Printed
in
Japan (E)
of
the
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