Kondo DCZ-366A, DCZ-365A, DCZ-365C, DCZ-361A, DCZ-366Y Instructions And Operating Manual
...
INSTBUTIONS
AIJU8TING
AMI
OPERATING
"YAMATO"
DGZ-Oei
SAFEn
STITCO
OVERIOCA
HAGRINE
KONDO
SEWING
MACHINE
CO.,
LTD.
QassesofDCZ type
DCZ-361Y-
DCZ-361A
-
DCZ-361C
-
DCZ-365YDCZ^365A
-
DCZ-365C
-
DCZ-366Y
DCZ-366ADCZ-366C
DCZ-367YDCZ-367A-
DCZ-367C
DCZ-368A-
361
series
Needle spacing:
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
Needle spacing
safety stitching.
2.4 mm.
For
safety stitching woven fabrics and knit goods.
3.2
mm.
Uses
sameasabove.
5.0
mm.
Uses
sameasabove.
2.4 mm. For safety stitdiingand ruffling.
3.2
mm.
Uses
sameasabove.
5.0
mm.
Uses
sameasabove.
2.4 nun. For safety stitching and ruffling with insert a decorativepiping.
3.2
mm.
Uses
sameasabove.
5.0
mm.
Uses
sameasabove.
2.4 mm. For safety stitching and rufflingwith attached tape.
3.2
nun.
Uses
sameasabove.
5.0
mm.
Uses
sameasabove.
3.2 mm. For inserting a tape inside the seam for binding pocket lining and
Figures and symbols on Model Number Plate
DCZ-361
A-Dl
• '
rr
Needle spacing
Throat
Plate
Type
Class
No.
(mm)
Presser
Foot
Feed
Mechanism
No.
Seam
Width
(mm)
DCZ
361
Y
2.4
Divided
into
two
sections
P =
Plain
(differential feed
impossible)
D =
Differential
(differential feed
possible)
1
2
5.0
^
6.5
5.5
^
7.0
361
A
3.2
1
2
5.5
7.0
6.0
8.0
361
C
5.0
3
9.0
11.0
365
Y
2.4
Two
sections
presser foot
and ruffling
attachment
1
2
5.0
^
6.5
5.5
7.0
365
A
3.2
1
2
5.5
7.0
6.0
^
8.0
365
C
5.0
3
9.0
11.0
366
Y
2.4
Two
sections
presser foot
and ruffling
attachment
with
insert
a
decorative
piping
1
2
5.0
6.5
5.5
7.0
366
A
3.2
1
2
5.5
7.0
6.0
^
8.0
366
C
5.0
3
9.0
^
11.0
367
Y
2.4
Two
sections
presser foot
and ruffling
attachment
with
attached
tape
1
2
5.0
'v.
6.5
5.5
7.0
367
A
3.2
1
2
5.5
7.0
6.0
'N#
8.0
367
C
5.0
.3
9.0
11.0
368
A
3.2
Two
sections
presser foot
(special)
1
2
5.5
7.0
6.0
8.0
Seam
Width
Needle Space
Specifications for DCZ-361
Appellation ; Super HighSpeed Safety Stitch Machine
Overalllength : 375 mm.
Overall
width:225
mm.
Overall Height: 290 mm.
Net Weight: 25 kg.
Construction; Dust-proof,oil-tightand entirely enclosed.
Seam
Specifications : El3, El3A and D12(SafetyStitch-JIS
B9070)
Used:Overseaming
and
overedging
woven
and
knit
fabrics,
attaching
sleeves
and
side
seaming.
Speed:
Maximum
: 5500stitchesper minute
Economical: 5000-5200stitchesper minute
Stitch Length :
5-26
stitchesper inch
Seam
Width:Overall
seam
width
consists
ofthe
needle
space
partandthe
overedging
part.
Needle space : 2.4 imn, 3.2 mm. and 5 mm.
Overedging
width :
3-4
mm.(standard)
Note
: 2.5- 5.5
mm.
width
maybemadebychanging
throat
plates
and
presser
foot
finger.
Presser
Foot
Lift:
4
mm.atthe
maximum
Differential
Ratio
: 1 :
2.7atthe
maximum
Lubrication:Clean
oilisconstantly
force-fedtoall
parts
ata
given
pressurebymeans
ofa
gear
pump
unit
anda
pressure
regulating
valve.
In addition,
splashed
oilisalsoutilizedfor lubrication.
Principal
Bearings:Ball
and
needle
bearings
and
oilless
bearings
abimdantly
used.
Recommended
Oil:
"Yamato"SFOil
Needle
Bar
Stroke
: 25
nun.
Needles
: DCX 1 for right needle
DM X 13
for
left
needle
Needlesizesavailable : Nos. 9, 11 and 14.
ThroatHates:
There
are
several
kinds
of throat
plates
with
various
types
ofstitch
tongues
fordifferent
uses.
Presser
Foot
Mechanism:Presser
foot
maybeswung
outto
the
left.
Pressureonfootisregulatedbytwo
springs
•
coil and plate. Foot plate isdivided into two parts - back and front-and eachofwhich
is hinged.
Feed
Regulating
Mechanism:Feed
amountisregulated
easily
from
the
outsidebypushing
down
abutton and
turning the hand wheel by hand.
Differential
Feed
Mechanism:Differential
feed
amountiseasily
adjusted
from
the
outsidebymanipulating
a lever lengthwise.
Feed Dogs : Standard number
of
teeth is 16 to the inch.
Single
(Plain)feed or two feed(Differential)
dogs.
Looper
Movement:Loopers
makeaspecial
curve
movement
best
suitable
for
high
speed
sewing.
Knives : Flat knives, 8 mm. in breadth and 1.5 mm. in thickness, used. There are two kinds of
kinve:,
j
special steel and Tangsten Carbide alloy.
CapacityofOil Reservoir : 1000c.c.
Installation:Submerged.
The
machine
headissettledonrubber
cushions
fixedtothe
base
plate
wluchisagain
fastened to the bottom plate with wood screws.
GeneralInstructions for
Using
DCZ-361
1. SewingSpeed
The
maximum
speed
for
this
machineis5500
stitches
per
minute
but
the
optimum
speed
recommended
for
daily
operationis5000-5200
stitches
per
minute.
In
startinganew
machine,itis
advisabletorunitat
the
optimum
speed
after
operatingitat
4500
stitches
per
minute
for
about
200
hours
(i.e.,
about
one
month),asit
will
greatly
help
prolong
its
life.
2.
Installation
Fig.1shows
the
measurements
for
installing
this
machine.
The
standard
position
for
installationisa
submerged
one.
But
the
non-submerged
installationisalso
practised.Aswe
have
always
the
tables
and
ancillary
parts
for
the
submerged
installationinstock
for
customers
who
wishtohave
these
articles
together
with
the
machines,
your
order
for
them
willbepromptly
executed.
Center
lineofMotor
Center
line
of
Machine Pulley
Hole
for
Base
Plate
SupportingBoardBolt
Base
Plate
Supporting Board
Base
Plate
Screw
Center
lineofMachine Belt
Base
Plate
Rubber
Cushion
3.
Motor
and
Belt
Use400 W.(1/2 HP) clutch motor and K-type V-veltfor drivingthis machine. The proper size of a motor
pulleysuitable for the rated
R.P.M.
may be pickedout from Table 1and Fig. 2.
Machine Pulley
Standard
Pulley
Fig. 2
Outside
Diameter
of
Motor Pulley
Table
1
R.P.M.
of
Machine
Head
Outside
DiameterofMotor
50
cycles
60 cycles
4.500
90
mm.
75
mm.
5.000
100
mm.
85
mm.
5.500
110
mm.
90
mm.
It is most ideal to use a pulley with the outside diameter
of the calculatedvalue. But wehavespecified standardiz
ed motor pulleys which are.easilyprocurable in the
market
and
whose
outside
diameter
measures
near
the
calculated
value
as these pulleysare made generally in
stepsof5 mm.
4
0"
Oisin
8 nun
Cross
Section
of
K type V-belt
4.
Lubrication
As
the oilhasbeencompletely drained from the
machine
beforeshipment,be sure to
fill
the oil
reservoir
be
fore
starting operation
through
theoil hole
removing
the
screw
indicated by "OIL"
mark.
Filloil until the oil
level
comesup to the upper lineH on the oil
gauge
shown in Fig.4.
Be
sureto check the oil
gauge
before starting operation every day. If the oil
level
isbelow the lower line L,
fresh oil should be replenished. After replenishing, replace the screw.
In order to keep the machinelife longer, it is
advisable
to changeoil completely after operatinga new machine
for
250
hoursorso.
"O
7
01L_(2>
(S)
DRAIN
Fig. 3
Fig. 4
To change oil, drain the used oil out of the reservoirby removingthe drain screw(A, Fig. 4) situated below the
balance wheel. The drain hole is indicated by the mark
"DRAIN".
Anoil filter net is fixed to the pump F insidethe machine. Clean this net and the insideof the base two or three
times a year. To do this, the base must be separated from the machine frame. To remove the base, drain the
oil completely out of the reservoir, tip the machine backwards and removethe set screws. When the cleaning
hasbeen
finished,
fix the
base
togetherwith the
packings
to the
machine
securely.
When
the oil stay the
space
between
the
machine
base
and the
machine,
theseoil can bedrainedby
removing
thescrewC. (Fig.4)
5. Rotating DirectionofBalance Wheel
The
balance
wheel
should turn to the right or
clockwise
when
facing
the balance
wheel.
6.
Needles
DC
X I
needleisused
for the right
needle
andDMX 13 for the left needle. There are manysizesfor them and
proper
size
needles
shouldbeselected according to the kind of work to be undertaken.
Generally
speaking,
#9
isthe standard
size
for
sewing
light
weight
fabrics,
#11 for
medium
weight
and #14 for
heavy
weight.
7. Setting Needles
Turn
the
balance
wheel
away
from
youuntilthe
needle
bar
reaches
the
highest
position,
pull
the
presser
bar
litter Ain theairov
direction
and
swing
out the
presser
foot Bto the left as
showninFig.5.Loosen
the
needle
set
screwC.insert
the
needle
inthe
holderasfarasit
willgowithitscarfed
side
(nota
long
grove)
at the
back
and then tigliien the screw.
8. Threading
Thread the machine as shown in Fig. 6.
A - Right-hand needle thread for cveriock seam
B -
Left-hand
needle
thread
for
double
chainstitch
seam
C — Upper looper thread for overlook seam
D — Lower looper thread for overlook seam
E — Looper thread for double ohainstitoh seam
Ww
a
DCxl
DMX
13
9.
Thread
Tension
for
Double
Chainstitch
Seam
Figs.7and
7-1
show
the
relation
between
the
needle
thread
guidesAandB.The
position
ofBisright
when
itisat
the
height
below
the
highest
pointofthe
guide
Aby1/4of
its
stroke
(sameasthe
needle
bar
stroke).
To
make
the
tension
onthe
needle
thread
lighter,
move
this
thread
guideBupwardsalittle
andtomake
heavier,
moveBdownwardsalittle.
Butitshouldbenoted
that
too
much
raisingorloweringofthis
guide
often
causes
thread breakage.
In
almost
all
cases,
the
needle
tension
maybesatisfactorily
adjustedbyturning
the
tension
adjusting
cap.
About
1/4
of
Stroke
A (Highest
Dead
Point)
StrokeofThread
Eyelet A
Fig. 7
Needle
threadinits
highest position
/
,/
Fig. 7-1
H
Needle
threadinits
lowest position
A (Lowest Dead Point)
10. To Thread the Upper Looper
To begin with, open the front covertowards you.
Move
the upper looper to the lowestposition, thread the
looper
at A
from
underas
showninFig.
8. Turn the
balance
wheel
untilthe
looper
moves
up to the
highest
position as
shown
in Fig. 9
and
then
thread
the
looper
at B.
Highest Position
Lowest
Position
Fig. 8
11. Various
Stitch
Formations
Fig,10-
Stitch
formationinordinary
overedging
seam
(with
three
threads)
Fig.11-
Stitch
formationinblindstitch
hemming
seam
(with
two
threads)
Fig.12-
Stitch
formation
whenaspreaderissubstituted
for
the
upper
looper
(withtwo
threads)
Fig.13-
Stitch
formationintwo
needle,
four
thread,
safety
stitch
overedg
ing
(the
upper
looper
threadiscaughtbyboth
needles-DCZ-220)
Fig.14-
Stitch
formationintwo
needle,
four
thread,
safety
stitch
overedg
ing
(the
upper
looper
threadiscaughtbythe
right
needle
only
~
DCZ-221)
Fig.15-
Stitch
formationintwo
needle,
five
thread,
double
safety
stitch
overedging(DCZ-36I)
Fig. 9
12.
Thread
Tension
The
thread
tension
shouldbeadjustedinaccordance
with
the
differenceinfabrics,
threads,
widthofbight,
stitch
length,
etc.inordertoobtainaproper
stitch
formation
each
time
when
the
above-mentioned
factors
have
been
altered.
To
tighten
the
upper
looper
thread
lower
the
thread
guide
markedRalittlebyloosening
the
screw
A.
To
tighten
the
lower
looper
thread,
lower
the
thread
guide
markedLalittlebyloosening
the
screwB.(See
Fig.
16)Toloosen
the
upperorlower
looper
thread,
raise
the
respective
guide.
To
loosen
the
needle
thread, upper the
needle
thread Eyelet A
(Fig.
17)byloosening
the
screwBandtotighten,
moveAdownwards.
To
make
the stitchas
showninFig.
10,thread this
Eyelet
at the
hole
Cand to make the stitches as shown in
Figs.11and 12,thread at D.
When
these
adjustments
have
been
completed,besuretotighten
each
set
screw.
It isone of the features of this machine that the adjustment of the
tension
canbemade
preciselybymeans
ofthe
expedientsasshown
in Figs. 16 and 17.
Make
final
micro-adjustmentbyturning
the
regulating
knob
onthe
tension
device.
In this
machine,
it isso
designed
that the
produced
seam
may
not be
influencedbythe
unwinding
condition
ofthe
spool
thread
even
in
high
speed
sewing
operation.
Thereforedonot
adjust
tension
only
by
pressing
downorreleasing
the
tension
springtothe
extreme
degree.
I
\mm\i
Fig. 17
13.
AdjustmentofPressureonPresser
Foot
and
HeightofFeed
Dogs.
Adjust
the
pressureonpresser
foot
and
the
heightoffeed
dogsinaccordance
with
the
thickness
and
kind
of
fabricstobe
sewn.
For
light
weight
fabrics,
weaker
pressureonfoot
and
small
protrusionoffeed
dogs
above
the
throat
plate
are
recommended.
For
heavy
weight
fabrics,
stronger
pressureonfoot
and
greater
protrusionoffeed
dogs
above
the throat plate are recommended.
Adjustmentofthe
pressureonpresser
footismadebyturning
the
adjusting
screw
showninFig.18.
the
pressure
gets
stronger
when
you
turn
this
screwinthe
directionofA
anditgets
weaker
when
you
turn
this
screwinthe
directionofB.
10
Pressure Regulating
Screw
Fig. 18
The standard settingofthe height of feed dogs is obtained when the bottomofthe teeth islevel with the
upper
surfaceofthe throat plate at its highest position. Almost all fabrics may be satisfactorily sewn in this
condition.
14. Adjustment of Bight Width
(1) To increase the.bight width (See Fig. 19)
Loosen the upper knife holder screw B, move the holder in the directionofthe arrow 0 as desired and
ti^ten
the screw B. Loosen the lower knife holder screw A and move the holder in the direction of O
until the lower knife D is closely pressed against the upper knife F with an appropriate pressure by the
actionofthe spring in the lower knife holder.
(2) To decrease Bight Width (See Fig. 19)
Loosen the lower knife screw A, move the holder towards P as desired and tighten the screw A. Then
loosen the upper knife holder screw B, move the holder towards P until the upper knife F gets in close
touch with the lower knife D and then tighten the screw B. Loosen the lower knife holder screw A again
and let the lower knife D come into close contact with the spring-pressed upper knife F. The sharpness
of the knives is easily checked by cutting a piece of thread inserted between the upper and lower knives
turning the balance wheel by hand.
To replace the upper knife, loosen the screw G and to replace the lower knife, loosen the screw H.
Of course, besides the distance between the left needle and the cut edge, the sizeof the stitch tongue of
the throat plate has much to do with the bight width.
p*
>0
Details
for
L
Fig. 19
11
15. To Regulate Stitch Length
Thestitchlengthmaybe
regulated
from
5 to 22 stitchesper inch(25.4 mm.)
freely.
However,on this machine, our standard feed dogs are fitted with. Therefore, in case of any stitch length
longer
than 8 stitches per inch is required, refer to our Instruction for adjustingmachine,paragraph8.
To
regulate
the stitchlength,
follow
the next procedure. To
begin
with,push the button A(Fig. 20) lightly
until it touches the regulator. Keep pushing the button lightly with the left hand and turn balance wheel away
from you with the right hand until this button falls into a dent on the regulator. Then push in the button A
strongly and continue to turn the balance
wheel
with stronger hand. The balance
wheel
hasthe graduations
indicatingthe stitch numbers per inch on its periphery. Turn the balancewheeluntil you can find the graduation
showing
the
desired
numberof stitchesper inch to coincide with the arrow-shaped feed regulatorpointer and
then
release
the
left
hand.
It should be noted that sometimes a
given
graduationactually
gives
somewhatdifferent number of stitches per
inch from the graduated
figure
according to the
sewing
condition - kind and thickness of the fabrics, differential
ratio, etc. In such cases,check the actual numberofstitches per inch and set the balance wheel to a proper
graduation.
Fig. 20
16. To adjust Differential Ratio
Loosen the milled screw A (Fig. 21), move the lever B lengthwise to a desirable position and tighten the screw A.
The differential ratio between the main feed dog (rear feed dog) and the differential feed dog (front feed dog)
may be freely selected from I : I to I :
2.2.
To adjust the differential ratio while stitching, connect the lever B with the pedal or the knee lifter at C with
a
chain.
In gathering operation, a special presser foot and feed dogs are to be used.
The differential ratio may be safely increased to I : 2.2 when the machine is adjusted to make
12,14
and 18
stitches per inch. But when the machine is adjusted to make 6, 8 and 10 stitches per inch, care must be taken
not to
raise
the
lever
Bnearthe graduation 3
becauseitwill
be apt to cause the feed dogsstrike against the
throat plate.
12
Graduation on Pulley
22, 20 12
10.
8,
6,
5
Differential
Ratio
Max.
2.2
1.6
In
caseofReversed
(Stretch)
Differential
Feedingisnecessary
depending
upon
the
sewing
conditions,
the
leverBshouldbeset
the
position
between
"0"
and
"S"
(lowest)
graduatedonthe
indication
plate
D.
(Fig.
21)
Fig.
21
13
Instructions
for
Adjusting the
Machine
1.
Interrelation
between
Needle
and
Lower
Looper
When
the
lower
looperisat
its
extreme
left
position,
there
shouldbe3-4
m/m
space
between
the
pomtofthe
lower
looper
and
the
centerofthe
needle.(Fig.
22)
Set
the
heightofthe
needlesothat
thereisa
spaceof2-
2.5
m/m
between
the
pointofthe
looper
and
the
upper
edgeofthe
eyeofthe
needle
when
the
lower
looper
has
startedtomove
rightwards
from
its
extreme
left
position
and
the
pointofthe
looper
has
reached
the
centerofthe
needle.
(Fig.
23)
When
the
lower
looper
movestothe
right,
the
looper
point
should
pass
the
rear
sideofthe
needleasclose
as
possible
without
touching
each
other.
The
lower
looper
being
fixedtothe
lower
looper
holder.
A
with
its
seat
closely
against
the
top
surfaceBof
the
holder,
the
heightofthe
looper,iskept
always
identical
and,
accordingly,
there
isno
needofadjustment.
3 ~
4mm
2 ~
2.5mm
Needle
for
Overlook
Fig. 22
Fig. 23
14
2. HeightofRight Needle
The heightofthe right needle is determined of itself from the relative position of the needle and the lower
looperasexplained
above.
To state more
precisely
for your
reference,
the
distance
between
the point of the
needle and the upper surfaceofthe throat plate should measure 10 m/m. (In the caseof the left needle, it
measures 8 m/m).
Needle
bar stroke is 25 m/m and the throat plate is 3.3 m/m in thickness. (See
Fig.
24)
25mm
8mm
1—^'
1
1
10mm
3.3mm
Fig. 24
Fig. 25
3. Interrelation between Lower Looper and Upper Looper
When
the
lower
looper
moves
towards
right
from
left,the
upper
looper
passes
over
the
cavity
situated
just
under the
swelling
on the back sideof the lower looper point.
Fixthe
upper
looper
sothat itspoint
may
pass
the rear
side
of the
lower
looperascloseaspossible
without
touching it. (See Fig. 25)
4. Interrelation between Right Needle and Upper Looper
The
upper
looperCbeing
fixed
closely
upon
the
platform
Bof the
upper
looper
holder
A,the
height
and.
the horizontal
position
of the upper
looper
aredetermined of
itself.
Thereforenoadjustmentisnecessary
for
the position and the height of the upper looper.
Adjustthe upperlooperso that the
needle
passes
its rear
side
with the
smallest
possible
clearance
between
them without touchingeach other
when
the
needle
ison itsdownward stroke. But, as thisadjustment may
sometimes affect the timingof the needleto the lowerlooper,you must be very
carefulinmaking
this
at^ustment.
The distance betweenthe center of the
needle
and the upperlooper point shouldbe 5-6m/m
when
the upper
looper isat its extreme left position. (See Fig. 26)
5~6mm
Fig. 26
15
5. Interrelation
between
Front
Lx)oper
(for
making
double
chainstitch) andLeft
Needle
The
height
oftheleft
needle
has
been
determined
from
its
relative
position
with
the
right
needle,
the
adjustment
ofthis
looper
shouldbemade
taking
the
height
of the left
needle
asa
definite
factor.
Adjust
the
height
ofthe
looper
first.
Set
this
looperashighaspossible
sothat the
highest
point
ofthe
looper
may
scarcely
touchthe
underside
of the throat plateas
shown
in Fig. 27.
Then
adjust
the
lateral
position
ofthe
looper.
This
looper
should
pass
the
rear
side
of the
needle
inits
travel
from
left to
right
and
pass
the front
side
of the
needle
inits
travel
fromrightto left as
showninFig.
28.
There should be 2-2.5 m/m distance between the looper point and the centerofthe needle when the looper
comestothe
extreme
left.
2 ~
2.5mm
Fig. 28
6. To Set Feed
Dogs
and Adjust their
Height
(1) The front feed dog A is adjusted by means of the screwD.
The rear feed dog Band the auxiliary feed dogC are adjusted by meansof the screwE.
The
auxiliary
feeddogCis fixedon the rearfeaddogBwith the set
screw
F. Therefore,
even
when
the
rear
feed
dogBhas
been
taken
offby
removing
screw
E,the
auxiliary
feed
dogCremains
fixed
onthe
rear feed dog B with the screw F.
To
vary
the
height
ofthe
rear
feed
dogBfrom
thatof the
auxiliary
feed
dogC,loosen
the
screwFand
make
adjustmentasdesired.
When
both
feed
dogs
are
fixedonthe
rear
feed
dog
holderH,loosen
the
screws
E and F to make this adjustment.
Normally
the
auxiliary
feed
dog
Cissetsothat its
upper
surface
may
come
1-1.5
m/m
below
that of the
rear feed dog B. (See Fig. 29)
(2)
(3)
(4)
(5)
Fig. 29
16
Alignment
of Feed
Dogs
andThroatplate
The
top
surfaceofthe
feed
dogsAandBshouldbein
alignment
with
thatofthe
throat
plate
when
the
former
comes up to
the
latter.
To
make
this
adjustment,
remove
the
rear
coverAand
the
upper
coverB,loosen
the
screwCwithahexagonal
socket
wrench
and
then
adjust
the
inclinationofthe
feed
dogssoastosatisfy
the
above
conditionbyturning
the eccentric feedregulating stud with a screwdriverD.
Care
mustbetakensothat
there
maybeno
opening
between
the
studEand
the
feed
barFafter
this
adjust
ment.
When
this
adjustment
has
been
finished,
tighten
the
screwCsecurely,
replace
the
coversAand
B.
As
this
alignment
has
been
throughly
examined
and
properly
correctedonshipment,itis
rather
advisable
not
to
tamper
withthis
setting.
(See
Fig.
30)
Fig. 30
8.
Howtoobatin
the s 'h
length
longer
than
8 stitches per
inch.
All
of standard
feed
dogs
which
machineisequipped
h
shouldbereplaced
with
special
feed
dogs
for
longer
stitch
purpose.
The followings are the respective special feed dogs to be
placed.
Machine
Special
Feed
Dogs
Standard
Feed
Dogs
(22
— 5
stitches)
( to be
removed)
Differential
(front)
No.
33245
No.
33547
DCZ-361C
Main
(back)
33546
33548
Auxiliary-
33549
33328
Differential
(front)
No.
33093
No.
33171
DCZ-361A,Y
Main
(back)
33172
33173
Auxiliary
33559
33544
After
replacing with special feed dogs, take off
screw C, so that stitch length regulation can be
released to longer than 8 stitches, up to
5
stitches
per
inch. To take off
screw
C, remove
temporary
the feed mechanism front shield D and
the feed mechanism cover A. ( Fig. 31)
Screw C is fitted for the purpose to suspended
the feed dogs from touching with the throat
plateinoperation
and to
secure
the
stitch
length not to become longer than 8 stitch per
inch. Therefore, screw C should be kept for
the use of restoration to standard feeding
again.
17
Fig.
31
9. To Sharpen Knives
In
case
the
upperorlower
knives
have
got
dull,
they
mustbesharpened.
Fig.32shows
the
sharpening
angles
for
upper
knives
and
Fig.33for
lower
knives.
Note;
When
resharpening
upper
knives,
positionAmeasuring10m/minlength
should
alsobeground.
This
prescribed10m/m
length
must
notbeotherwise.
By
the
way,wecan
offer
you
our
"YG-10"Sewing
Machine
Knife
Grinder
which
can
sharpen
easily
and
precisely
various
kindsofsewing
maching
knivesata
desirable
angleina
jiffy.Weare
sure
you
can
greatly
promote
your
efficiencybythe
useofthis
apparatus.Werecommend
youtopairanupper
knife
made
of
Tangsten
Carbide
alloy
withalower
knife
madeofspecial
steel.
Fig. 31
ti
>
-U-
Fig. 32
Further Suggestionsfor AdjustingDCZMachines
A. Skip-stitches
1. Seeif the needle, upper and lower loopersare regularly threaded.
2. See if the needle is bent. If it is bent, replace a new one.
3.
Check
if dust
gathers
inthe
needle
hole
of the
needle
holder
and,
accordingly,
the
height
of the
needle
gets irregular.
4. Check the interrelation among the needle, upper and lower loopers.
5. Wrongchoice of the needle often causes skip stitching.
6. As nylon thread is much stretchier than cotton thread, formation of the needle thread loop becomes
difficult. In such case, set
the
needle a little lower
than
the
standard
position.
B. Thread Breaking
1. Check the presser foot chaining-off
finger,
loopersand thread guidesto seeif there are some hitches and
burrs on these parts over which the thread passes.
2. Wrongrelation among the needle and loopers also causes thread breakage.
3. Inferior thread is the biggest causeofthread breakage.
4. Beingsusceptible to heat, nylon thread is apt to break through frictional heat in high speed operation.
In this case, apply "Yamato" SP Oil on the thread. ("Yamato" SP Oil is a lubricant developed for pre
venting skip stitches in synthetic threads.)
C.
Loose
Stitches
1.
Foreign
mattersentered between the tension
discs
obstruct the
closs
contact of the frictional surface of
the
discs
and, accordingly, a proper tension on thread can not be obtained. Thus loosestitches often
18
occur.
2.
Wrong
relation
among
the
needle
and
loopers
causes
loose
stitches.
3.
Wrong
positional
relation
between
the
thread
guides
also
causes
this
trouble.
D.
Uneven
Stitches
1.
Uneven
stitches
mayberemediedbyadjusting
the
positionofthe
looper
thread
take-upsothat
more
threadissentinto the looperand tightening the
tension
spring.
2.
When
the
work
cannotbefed
smoothlybysome
hitches
and
burrsonthe
throat
plate
surface,
uneven
stitches will be apt to occur.
3.
When
the
upper
edgeofthe
lower
knifeisset
higher
than
the
upper
surfaceofthe
throat
plate,
the
work
cannot be fed smoothly and thus it causes uneven stitches.
4. Dull edges
of
the knives also cause this trouble.
5. Theuseof thethreadof
improper
twistoften
causes
uneven
stitches.
E.
Undulated
Seams
1. Improper adjustmentofthe differential ratio.
2.
Improper
adjustmentofthe
pressureontension
spring-too
strong
ortoo
weak.
3.
Misalignmentofthe
surfacesofpresser
foot,
throat
plate
and
feed
dogs.
4.
When
the
feed
dogs
are
tilting
forwards,
seams
are
apttostretch,
and
when
tilting
backwards,
apt
to
shrink.
5. Inappropriate
height
of the
feed
dogs.
F.
Uncommonly
Large
Punctures
Caused
bythe
Needle
Penetration
1. Blunt needlepoint. Replacea new needle.
2.Alittle
smoothing
outofthe
area
around
the
needle
holeofthe
throat
plate
often
producesagood
result.
3.Institching
synthetic
fabrics,
the
frictional
heatofthe
needle
often
causes
large
punctures.Inthis
case,
use
"Yamato"
SP
Oil.
G.
Damages
to the
Work
Caused
byFeed
Dogs
1.
Feed
dogs
with
tips
too
sharp
are
apttoinjure
the
work.
Grind
off
sharp
tipsalittle
with
oil
stone.
2.
When
the
upper
surface
of the
feed
dogistilting
sidewise
andthe
workiscarried
forward
with
either
cornerof the feedtips, oilstoneisprofitably usedto
level
off the
feed
surface.
Note:
We
have
given
general
instructions
for
using
and
adjusting
DCZ
Machinesinthis
Instructions.
But
there
may
occur
some
casesinwhich
you
must
make
adjustment
somewhat
different
from
the
standardmethodsstated herein, depending upon kind of work,thread and other
various
conditions.
In
such
case,
make
proper
adjustmenttosatisfy
these
special
conditions,
refering
to the
informations
given herein.
19
CAUTION
(Lubrication")
1) To
begin
with, the oil reservoir
shouldbefilled
with quality high
speed
oil up to the upper red line
on the oil sight gauge
window
at the rightfront of the
machine
base
before
starting
the
machine.
2) Be careful replenish with oil immediately when
it has dwindled below the lower red line on the oil
sight gauge window.
ATTENTION
(Graissage^
1) Le reservoir d' huile doit d'abord etre rempli,
avant
la mise en service de la machine,
d'une
huile
pour
marche rapide de bonne qualite jusqu'a la ligne rouge
superieure de I'indicateur de niveau d'huile au cote
avant
clroitducarter
de la
machine.
2) Veiller a remplir immediatement de I'huile des
queleniveau
d'huile
tombe
a la
ligne
inferieure de
I'indicateur
de
niveau.
VORSICHT
(Schmierung)
1) Vor Inbetriebnahme der Maschine ist zuerst der
Olbehalter bis
zur
oberen
roten
Linie
des
Olschaug-
lases mit Schnellaufol einer guten Qualitat zu fullen.
2) Es ist darauf zu achten, dass sofort 01 nachgefullt
wird wenn
der
Olstand bis
unter
die untcre Linie des
Olschauglases gefallen ist.
ATENCION
Cengrase)
1) Antes de poner en servicio la maquina se debe
llenar primeramenle el recipiente de aceite hasta la
linea roja superior del cristal de observacion que se
encuentra en el lado delantero derecho de la caja de
maquina, con aceite para alta
velocidad
de reconocida
buena
calidad.
2) Hay que cuidar que sea rellenado inmediatamente
aceite, cuando el nivel de aceite se heya bajado por
debajo do la linea inferior del cristal de observacion.
Oil
recommended:
Sortes
d'huile
recommandees:
Empfohlene
Olsorten:
Calicladesdeaceite
queserecomiendan;
a)
ESSO
-
TERESSO
47
h)
Shell
-
Shell
TERAS
29
7
Oil
here
huiler
ici
bier
olen
sceitese
aqui
Oil
sight
gauge
window
indicateurdeniveaud'huile
Olschauglas
cristaldeobservacion.
drain
30®^®—
^S,Oil
Drain
Cap
Screw
Visdepurge
Olablasschraube
Tornillodesalida
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