JUKI DLN-415 User manual

DLN-415 SPECIFICATIONS
Sewing speed .._...__.___._ Up to 5,000 s.p.m.
Stitch length . . .._._______._.
O-4mm(5/32”)
Stitch adjuster .._._._._._..._ Dial system
Reverse sewing .._._...._._ Lever system
Needles .._.__._.___._.__.... DB Xl (16x231) #ll, #14, #16, #la
Lubricating oil .._.___.__. New Defrix Oil No. 1

DLN-415 CONTENTS
Adjusting
the pressure of the pre5w foot .............................................................................. 8
The PrePser foot hand liffer ...................................................................................................... 8
Height of
the feed dog ............................................................................................................... 8
The stitch length ........................................................................................................................
9
Adjusting the stitch length .........................................................................................................
9
Reverse sewing ...........................................................................................................................
9
Purhing weswre Of the ‘eed lever .............................................................................................
9
inserting
the neel3e ..................................................................................................................... 10
l”$talling and removing rhe sewing hook .................................................................................
10
Relation txiween
the hOOk and the needle ........................................................................... 1,
Adjusting the height of the presser bar ....................................................................................
12
Adjusting the amount
of tiw thread takeup ........................................................................... 12
DLN-415L INSTRVCTlCN BOOK .......................................................................................
13
,NOWl Due fO impro”ementr 0” the machine. some Dam Of rtle operational procedures of
this lNSiRUCTlON BOOK might be changed wittlaut notice.

IINSTALLING THE OIL RESERVOIR
Operator side Hinge side
MOTOR PULLEY AND THE BELT
As shown in the figure. set the reservoir in
such a way 50 that the 4 corners 01 the grow-
ed part of the table will be supporting the
reservoir.
1. Nail in the 2 rubber cushionr in front to
the protruding part 01 the table.
2. place the oil reservoir on the protruding
part of the table.
,b,ade, ~Lt4-4,5 can sew at a high speed oi
up to 5.000 r.p.m. When connected directly
to the power source. use a 3-phase 400 W
(l/2 HP) clutch mata.
Use a hl type V-belt. The relation between
the number oi rotation oi the machine with
the dimenrion of the motor pulley is shown in
the table. (Effective diameter)
* The effective diameter oi the motor pulley
rnGk”S the diameter a~ measured from the
center of the V-belt when the belt is wound
around the machine.
Cycle
50
60
No. of rotation
of machine
5.060 5.p.m.
4,630 5.p.m.
5,040 5.p.m.
4,540 5.p.m
Part KO. of
mOtol pulley
MTK-P”120000
MTK-P0110000
MTK-P”,O”OOC
hlTK-P”090000
Effective diameter
of motor pulley
120mm (4-9/W)
IlOmm (43/16”)
~lOOnlrn (3.3/16”)
90mm (3-T/16”)
-2-

CAUTIONS ON OPERATING THE MACHINE
.? Do not run the machine. under anv circumrtances, before the oil reservoir is filled up
with fresh oil.
is This machine can run with a meed of “11 to 5.000 r.o.m. but for the iirst month drop
the speed to about 4,500 r.p.m.
LUBRICATION
Before operating the machine
1. Fill up Ihe oil reservoir with IUK New
~eirix oil ~0.3 up to the mark “HIGH”.
2. Watch and see that the oil level doer not
go below the “LOW” mark.
3. Under normal conditions, when the ma-
chine is run after il is filled up with oil, the
oil will spurt against the oil right window
(Caution)
1) When the oil gets dirty, change it with’new.
fresh oil. If the oil plug oi the veservob is
removed, oil will come out.
2) When the mathine is to be run for the first
time or when it wan idle for a great length
of time, run the machine at 3,000- 3,500
s.p.m. for about 10 minutes and allow the
machine to get well-oiled.
-3-

1. Adjusting the oil supply to the face
Pad
When xliusting the oil supply to the thread
take-up and needle bar crank components,
remove the Iaw plate and the oil prevrnt-
ing plate and adjust by turning the oil ad-
justing pin at the tip of the main shaft.
1. When the red mark of the adjusting pin
comer near the crank. the oil amount gets
le5s.
2. When the red mark comes to the opposite
side of the crank, the oil amount gets more.
(Caution)
The oil amount doer not thongs immedi-
ately after the odiurtment, so when ad-
1
jurting, hove this ii mind.
2. The oil adjusting pin
‘I. The oil adjusting pin has a carved groove
as shown in the figure. When this groove
and the oii hole oi the main rhait come
rogcthpr, the oil amount gets more.
2. When the groove is at the opposite side of
the oil hole, the oil amount gets Ierr.
3. The red mark on the oil adjuster shows the
ride without the carved groove.
3. Adjusting the oil supply to the hook
components
The supply of oil to the hook components
cm be adjusted by the oil regulating valve an
the hook shaft.
1. If this valve is turned toward 0 ride(right),
the oil amount gets more.
2. If this valve is turned to 0 side (left), the
amOunt geri les

THREADING THE MACHINE
Rotate the hand wheel mright and place the thread take-up to the highest positiart.
1. Pass the needle thread in the order shown by the iigure.
2. Pair ihe thread to the needle eye lrom lcit to righr.
3. Pull out about 70cm(4”) of the thread from the needle eye.

PREPARATION OF THE BOBBIN THREAD
How to insert the bobbin
1. Hold the bobbin and inert it to the bobbin
case 50 that Lhe thread \vill be in right-hvist
condilion.
2. Pair the thread to the thread pasring hole
oi the bobbin case.
-6

THE THREAD TENSION
,
Adjusting the needle thread tension
Ideal stitches are iormcd wlwn the needle
thread and the bobbin thread are perfectly
interlocked at the center ot the cloth.
The tension of the needle thread is adjusted
by the thread tension nut.
1. Turn it to right to make the tension stronger
and to the leit to make it we&r.
Thread take-up spring
* To change the moving range oi the thread
tenson spring:
1. Loosen the screw al the thread tension
bracket.
2. Rotate the thread tension bar.
* To change the strength oi the thread take-
up spring
1. Loosen the ret screw, remove the thread
tenrion bar
2. Loosen the thread tension bar set screw
and adjust.
3. When the thread tension bar is turned to
right, the spring will get stronger and ii
turned to left, it Gil xet weaker.
Adjusting the bobbin thread tension
Rotate the thread tension screw ai lhe
bobbin case to adjust the bobbin thread
tensian.
1. Rotate if to right to make the bobbin thread
tension stronger and to left to make it
weaker.
-7-

PRESSER FOOT AND FED9 DOG
5 kg (ll’lbr). -
if a pressure of mare than 6 kg(13.2 Ibs) is
required, use the exchanging rpring in the
atcersory box
The presser foot hand lifter
To stop the prerser foot at the lifted po-
sition:
1. Rotate the hand liiter in the war of the face
part either to right or left.
2. The presser foot will go up about 5 mm
(13/64”) and rtopi.
3. ia lower the presser foot, activate the knee
lifter once and the presw foot will cmne
down to the original position.
4. With the knee liiter, the prerrer foot nilI
go up about Wmm(25/64”)
Height of the feed dog
The height a, the feed dog from the surface
of the throat plate is set from 0.7.0.8mm. In
sewing light weight materiali, if this height is
too high, shrink-stitching may result.
To adjust the height of the feed dog:
7. Looseri the clamping scre~v of the teed driv-
ing fork of the compound feed.
2. >M~ave the feed dog base up and dawn and
.tdjust.
3. After adjusting, tightly tighten the clamping
5crew.
cl.?-o.*mm

THE STITCH LENGTH
L
Adjusting the stitch length
The stitch length can be adjurteo sly rumng
the iced adjusting dial above the feed lever.
The iigurei an the graduator are rhown in
mm.
2. And match the desired figure with the pin
which ii coming au! irorn the arm.
* The maximum stitch length is 4mm (5/32”)
Pushing pressure of the feed lever
Irrespective oi the length of stitches, the
pull-up spring is somewhat strengthened IO
that during high speed sewing if the hand is
releawd lrom the feed lever. it will positively
return to the original position.
When shorter stitcher are desired or when
the rotation of the machine is to be slowed
down, it ii pasrible to decrease the pushing
preriure oi the feed lever.
1. When the adjurting nut ii loosened, the
pressure will become weaker and ii the nut
is tightened, the pwssure will became
stronger.
-9-

INSERTING THE NEEDLE
INSTALLING AND REMOVING
r
“re DB X 1 needler. There are many
numbers and sizes of the needle, IO select
the mrrect size and number depending on the
thickness of the thread or kinds of sewing
material.
1. Rotate the hand wheel and bring the needle
bar to the highest porition.
2. Loosen the needle clam,, screw.
3. Hold the needle so that the long groove of
the needle comes to your leit side.
4. insert the needle deep into the needle hole
5. Then securely tighten the needle clamping
screw.
THE SEWING HOOK
- 10 -
During the running of the machine, if thread
hardr get into rhe hook or the position ai the
hook changes for borne reason 01 to exchange
the hook with a new one, do ar follows in
order:
1. Rotate the hand wheel and bring the needle
bar to the highest position.
2. Remove the bobbin case and the needle
3. Remove the bobbin case base positioning
finger ret screw and take out the bobbin
case positioning finger.
4. Loaren the 3 xrews of the sewing hook.
5. Rotate the hand wheel and raise up the
feed base to its highest position.
6. Rotate the sewing hook with your hand
and place it in the position ar shown in
the figure.
7. Pull the hook to your left and take it out.
* To install the hook back, reverre this pro-
cedure.

RELATION BETWEEN THE HOOK AND THE NEEDLE
Match the needle with the sewing hook as
tallows:
1. Rotate the hand wheel and bring the needle
bar to its lowest position.
2. Loosen the needle bar clamping set screw.
(Note)
When matching the timing of the needle and
the sewing hook, be sure to ret the feed
adjusting dial to “0”.
(Determine the height of the needle bar]
3. hlatch the upper c,,ived linc 01 the needle
bar with the lower edge ai the needle bar
low, bushing.
4. Tighten the needle bar clamoing ret screw
3 DETER!vlINE THE POSITION
OF THE SEWING HOOK
7. Rotate the hand wheel and match the lower
carved line of the needle bar with the lower
edge of the needle bar lower bushing.
8. In this condition. match the blade point of
the haok with the center line of the needle
9. Make the clearance between the needle
and the hook blade point to 0.05 mm and
10. Securely tighten the hook clamping set
screw
(Determine the position of the sewing
hook)
5. Laaren the 3 clamping screws of the hook
so that the hook can be rotated freely with
the hand.
6. Place the hook with your hand to thethread
pass/rig position

ADJUSTING THE HEIGHT OF THE PRESSER BAR
r
When the height or the direction of the
presser bar is to be changed due to the
exchange of presrer foot:
1. Remove the rubber plug of the face plate
2. From this hole. adjust by loosening the
prerrer bar clamping screw.
3. After the adjustment, securely tighten the
ret 5crew.
;I
ADJUSTING THE AMOUNT OF THREAD TAKE-UP
/.I\\
3-7
b / I /
The amount of the thread take-up should
be changed according to the length oi stitcher
or thickness af the sewing cloth to produce
ideal thread tension.
1. When sewing heavy weight materials, move
the thread guide to your left.
The thread rake-up amount of the take-up
gets more.
2. When sewing light weight materials. move
the thread guide to your right.
The thread take-up amount gets less.
- 12 -

INSTRUCTION BOOK
DLN-415-L
SPECIFICATIONS
Sewing speed ..,........._.....,_...,.,., Up to 3,000 s.p.m.
Stitch Icngth .,............,.............. 0 - 6mm(15/64”)
Needle _.......,...,....,_.........,.,....... DB X 1 #22
USAGE
Fur lop stitching of heavy weight materials (up to 12 sheets of Canton material)
(Example) Seats of cars. brief cases, slippers etc.
TIMING OF THE NEEDLE WITH THE SEWING HOOK
When the needle has risen 1.8mml,5/64”), from
its lowest dead point, the distance between the
upper end of the needle eye and the blade point
of the, scwin~ hook should he ?.8mm(7/64”~.
With the exception of above, all other specifications xe identical with DLN-415.
- 13 -
At that point, the clcarancc between the needle
and the biadc point of the sewing hook should
be O.lmm(1/256”). (when the feed amount is “O”.)