Seiko LD series Manual

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From the library of: Superior Sewing Machine & Supply LLC

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From the library of: Superior Sewing Machine & Supply LLC

SPECIFICATIONS
Maximum
speed:
Number of needle :
Needle:
Thread:
Feed :
Stitch:
Presser foot:
Presser bar lift:
Lubrication:
Oil volume:
Working space:
Motor:
Diameter of motor puiley
3.000-Max.4,000 r.p.m. (Speed changes by number of needle
and needle gauge)
One, two, three and four
DV X59 ft 18 to #25 (#22 standard)
Synthetic up to #2
Upper, drop and needle feed (LD-8, 28, 38, 48)
Needle and drop feed (LD-7, 27, 37, 47):
3 to 12 stitches per inch
Alternating pressers (LD-8, 28. 38, 48)
Flat presser foot (LD-7, 27, 37, 47)
8mm by lever
13mm by knee lifter
Full-automatic oiling
550 cc
270mm x 135mm
250W or 400W 2P clutch motor
50 cycle 80mm, 60 cycle 65mm
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CONTENTS
Page
Setting up machine 1 & 2
Oiling 3
Inserting needle thread, threading loopers 4
Threading needles 5
Regulating tensions, regulating pressure on material 6
Adjusting stitch length and lift of pressers 7
Adjusting feed dog & To set feed dog in relation to needles 8
Feed dog forward &backward position. Timing of feed dog eccentric. Needle bar
forward and backward position 9
Adjusting loopers position in relation to needles 10
Height of needle bar 11
Loop deflector, spreader 12
Adjusting thread guide, looper thread take up, needle thread tension releaser 13
Replacing arm shaft connecting belt 14
Timing of vibrating presser foot 15
Gauge 16
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SETTING UP MACHINE
Figure 1 indicates those sizes, shapes of holes for installation of machine, center
line of motor, etc.
Figure 2 shows depth of four corners of table for machine.
Fig. 1
20<-25<J
]— Size of center position
of motor
18%
A. Stationary table (Fig. 1)
23%
Fig. 2 B. Open type table (Fig. 3}
Figure 3 represents a sewing type table so as to threading without tilting machine
head.
Fig. 3
To assemble oil pan, remove latches (B.C., Fig. 4)and four sorews(1,2 Fig. 4), hang
both ends of latches (A) to out-out of table and tighten latches 8 and 0 by said four screws
Then, place felt pads on out-outs at four corners and nail them to out-outs (Fig. 5)
respectively.
Felt pad
Table
Table
Fig. 4 Fig. 5
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Attach two L shape hinges(A, Fig.6) to bed side and hook them to semi-oiroie hinges
(B), then, push the support plate (a, Fig. 7) downward as far as it will go and set
the machine on the table.
Caution: When putting the machine on other places than table, pull up the support plate
(a, Fig. 7) so as to keep the balance of the machine.
Fig. 6 Fig. 7
Pass the rope from A to 8 and D through the V shaped groove 0 and in the
order 1 to 3.
Table
Oil tank /
(D (D
Fig. 8
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OILING
Machine has an automatic oiling mechanism, but, oiling points (Arrows, Fig. 9) are
provided for hand oiling for parts in movable contact which are not lubricated from oil
reservior. — .
Fig. 9
Automatic lubrication system
(A) Automatic oiling system is composed of an oil reservior, holicw arm shaft and
hollow bed shaft through which necessary amount of oil is delivered to all of parts in
movable contact, except these parts described in the column (B), while machine is in
operation. Oil is distributed by centrifugal force through small jets.
The amount of oil flow, which should be slow, can be seen in the oil window (B,
Fig. 12), It can be adjusted with oil pump (C Fig. 11) by opening or closing it.
When running in, keep speed at 1,800 to 2,500 R.P.M.
(B) Keep clean oil reservoir and pour oil in the reservoir (oil pan) up to the center
line (A, Fig. 10).
When oil has been soiled for several months use, release it through the hole (B, Fig.
10) and pour new oil in the oil reservoir.
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INSERTING NEEDLES
Turn balance wheel toward you until needle bar reaches it's highest point, loosen
needle set screws and insert needles up into needle clamp as far as they will go with
scarf of needle toward left and securely tighten needle set screws.
The size of the needle to be used is determined by the size of the thread which
must
pass freely through eye of needle.
Needle set screw
Fig. 13
THREAD
Left twist thread should be used for needles and either left or right twist thread
can be used for loopers.
THREADING LOOPERS
Pass thread through threading points in the order from 1 to 9 as shown in the
figure 14.
Fig. 14
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Before threading further, turn balance wheel toward you so as to bring letter M on the
wheel to the arm point as shown (B, Fig. 15), hold the dial {Fig. 16) pull it toward
the arrow and slightly turn it toward right, then loopers can move toward you. This
will make threading easier.
Fig. 15 Fig. 16
Then, pass threads in the order from 10 to 12 and draw threads 50mm and pass them
loopers, and return the dial to
it's original position. Be sure not to make cross of
threads.
in '"'g-
THREADING NEEDLES
Pass threads through threading points in the order shown in the figure 18 from 1 to
10 and draw threads about 50mm. (Refer to Fig. 21 for threading tension-discs).
Hg. 18
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REGULATING TENSIONS
Tension should be just enough to set the stitch in the material, and it should be
regulated according to the material.
..Needle thread
Perfect stitching
Looper thread pjg
Imperfect stitching
\ ''U
B ^
Fig. 20 Tight tension
of looper thread
Loose tension
of needle thread
For more tension, turn the nuts (E, Fig. 21 and F, Fig. 22) toward'^arrow direction,
and for less tension, turn them toward arrow direction.
m
f'g- 21 Fig. 22
REGULATING PRESSURE ON MATERIAL
Always use the lightest pressure possible to allow higher working speed. It can be
adjusted by turning the regulating screw (A. Fig. 23) toward arrow direction with a
screw driver for more, pressure, and for less pressure turn it toward^ arrow direction.
(B, Fig. 23). Before adjusting pressure, open the face plate (A, Fig. 24) and
confirm
the distance between (B) and (C) Fig. 24 is about 20mm. If it is not 20mm, adjust
it by the screw on the (B).
Fig. 23 Fig. 24
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ADJUSTING STITCH LENGTH
Numeral numbers on the stitch indicator show the number of stitch per inch.To change
length of stitch, turning parts (G, Fig. 25) toward right, at the same time turn balance
wheel over toward you until plunger enters a notch in adjustable eccentric on arm shaft.
Then, turn the (G) 1/4 turn.
Now, press the button (11, Fig. 26) and at the same time turn balance wheel over to
ward you to increase length of stitch cr over
from you to shorten stitch, until desired
length on the stitch indicator. Then, release the button (H) and turn the plunger (G)
until it springs outwardly. Then, the machine is ready for operation.
CAUTION: Be sure to operate the machine after the plunger (G) has sprung outwardly.
After determination of the stitch length, adjustment for loopers (page 10) and for
spreader (page 12) must be made. v.;
-• yes •" •"
fM Fig. 25
Fig. 26
ADJUSTING LIFT OF PRESSERS
The lift of vibrating and lifting presser foot is controlled by the wing nut(1, Fig. 27).
Loosen wing nut and raise it for higher lift or lower it for less lift, then securely tighten
the nut.
Fig. 27
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ADJUSTING FEED DOG
It is the correct position of feeder where teeth of feeder are .parallel with surface of
needle plate and teeth protrude 1.5mm from surface of needle plate, when needle bar
is at the lowest point.
The parallel adjustment is made by the screw (J, Fig. 28) tilting machine head.
Adjustment for height, loosen the nut (A, Fig. 29) and the screw(H, Fig. 30), turn the
adjusting screw (B, Fig. 29) to right to raise the feeder and turn it to left to lower it.
After the feed dog has correctly been set, securely tighten the nut and screw (H, Fig.
30).
Rg. 28
Rg. 29 Rg. 30
TO SET FEED DOG SIDEWISE IN RELATION TO NEEDLES
Remove the needle plate {A, Fig. 31), loosen two set screws(A. Fig. 32, C, Fig. 27).
adjust so that needles enter into needle hole of feed dog, set feeder parallel with slots
of needle plate for feeder, then tighten feeder.
For more sideways adjustment of feeder b
is necessary, after tightening the screw I||J^ .".jj
(J. Fig. 28), remove the cover plate (B, -|j|•J ^
Fig.31), and loosen position screw (B,
Fig. 32) and screw (C, Fig.32), and set
position of feed bar. Then securely tight-
en screws.
^. 1m
Fig. 31
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Fig. 32
TO SET FEED DOG FORWARD AND BACKWARD IN RELATION TO SLOTS
IN NEEDLE PLATE
Adjustment of feed dog forward and backward is made by the screws (D.E.Fig. 32)
after removing the cover plate (B, Fig.31).
TIMING OF FEED LIFT ECCENTRIC
Remove the screw (C, Fig.31) and remove the cover plate (D, Fig.31). Loosen two
screws {L. Fig. 33). hold the L screw with a screw driver and at the same time slight
ly turn balance wheel forward, then the feed lift eccentric moves backwards to make
feed dog rise later. To make feed dog rise earlier, slightly turn balance wheel backward
and after the adjustment, securely tighten screws and replace the cover plate.
of feed bar (see'Fig. 35),'adjust'needle
bar rock frame so that needles descend 1.5mm from front end of needle hole of feeder.
After setting position, securely tighten the screw and replace the top cover.
• :;'Vv• Mft
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ADJUSTING LOOPERS POSITION IN RELATION TO NEEDLES
A. POSmON OF LOOPERS
Set loopers to looper holder (B. Fig.36) slightly tilting their back portion to left. In
this case, clearance between looper holder and bottom" of loopers should be 0~1.5mm
as figure 36 (only for compound and walking foot machine). For needle feed machine, it
should be 0. Tighten looper set screws (C, Fig. 36). Further, when loopers are in
front position, clearance between right side surface of back of loopers and loop
deflector (M, Fig. 37) should also be 1.5mm.
B. LOOPER SIDEWAY ADJUSTMENT
It is so made that clearance between groove of needle and looper point is 0.05 to 0.2
mm and tighten screw (N, Fig. 38).
Feed dog ^
Fig. 36 Fig. 37 Fig. 38
C.
LOOPERS FORWARD AND BACKWARD POSITION
In loopers forward and backward movement, crossing point of needles and looper points
should be same position in grooves of needles. To adjust this, remove cover plate (D,
Fig. 31), loosen screw (A, Fig. 39), adjust loopers movement faster or slower against
needles by strength or weakness of tightening two screws (8. C, Fig. 39). After setting
the position, tighten the screw and replace the cover plate.
Fig. 39
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Turn balance wheel toward you. and align the point (B, Fig. 40) and arrow on bal
ance wheel, loosen the screw (D, Fig. 39) and set looper point to the center of needles
(Fig.41).
Center of needle
Fig. 40 Fig. 41
D. NEEDLE GUARD
Turn balance wheel toward you, when looper points" are 2.5mm (Fig. 42) from the
center of needle, adjust so that right side of needle guard touches to side of needle
(Fig. 44) but looper does not touch to needle, and tighten screws (A, 8, Fig. 43).
Needle guard
Fig. 42 Fig. 43 Fig. 44
HEIGHT OF NEEDLE BAR
Adjustment is made after locper position has been determined, open face plate (A,
Fig. 46), adjust needle position so that the measurement from looper point to upper end
of needle eye is 2 to 3mm (Fig. 45) by two screws (B, Fig.46).
Fig. 45 Fig. 46
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LOOP DEFLECTOR
Tilt machine and turn balance wheel, when looper is in front; Iccsen screw (0, Fig.
47) and adjust clearance between left side of loop deflector and right side of needle
from 0.5mm to 1mm.
Looper
Driver
1%
Loop deflector \
Fig. 47 Fig. 47-1
Adjust loop deflector so that it comes cut 0 to 1mm from the needle (Fig. 47-1).
SPREADER
Adjusting spreader point, turn balance wheel toward you to lower needle, when point
of needle reaches to circumference of looper (A, Fig. 48), adjust measurement between
side of needle and spreader point to 1.5mm by screw (B, Fig. 48).
Spreader holder
opreader ®
Spreader sideway
Fig, 48
When spreader holder is at extreem left end, adjust clearance between spreader point
and left side of looper to 0.2 to 0.5mm by the screw (0, Fig. 48). Clearance (Fig.
50) through which spreader point pass upper portion of the looper (Fig. 50) is adjusted
by the screw" (0, Fig. 48) from 0.5 to 2mm.
— I—0.2-0.
0.5-214,
Spreader
Looper
Fig. 49 Fig. 50
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Tilt machine, loosen spreader driving eccentric screw and its counter balance screws
(A, B. Fig. 51), move them toward left for bigger spreader stroke, and move them toward
right for smaller spreader stroke. After position of spreader has been determined,' se
curely tighten screws.
To decrease the'arnoum,' reverse the
adjustment by either lowering thread take-up or raising the thread guide.
LOOPER THREAD TAKE-UP
To increase amount of thread, move looper thread guide (A, Fig. 53) and looper thread
take-up rod (B, Fig. 53) to left or move looper thread guide downward. To decrease
amount of thread, reverse the adjustment. After the adjustment, securely tighten screws.
Fig. 52
ADJUSTING NEEDLE THREAD TENSION RELEASER
Remove arm top cover, lower lifting -/SSSSSm
lever (A, Fig. 54), loosen screw (C, Fi'g. fi
54) on collar and move the collar toward //
right to open tension more, move the collar
toward left to open tension less.
Normally, opening of tension is 1.5mm
when lifter lever works. After setting po-
sition, tighten the screw.
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Fig. 53
Fig. 54
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REPLACING ARM SHAFT CONNECTING BELT
Turn balance wheel to raise needle bar
to its highest point, turn lower shaft and 9
adjust so that arrow mark (B, Fig. 55) on 9
lower shaft pulley (A, Fig. 55) is parallel ^
with bed rim (D, Fig. 55) and is toward
arm shaft (see Fig. 55), in this position,
assemble a new belt to arm and lower
shaft pulley. ^
Fig. 55
SIDEWAY ADJUSTMENT OF PRESSER
FEET
Insert vibrating and lifting presser feet
into respective presser bar
as far as they
will go, adjust so that they are parallel
and vertical against slots of needle plate
and feed dog.
In this position, set screws (C,D, Fig.
56).
Fig. 56
ADJUSTMENT OF PRESSER HEIGHT
Raise presser bar lifter (A, Fig.57). adjust measurement between upper surface of
needle plate (B, Fig. 57) and bottom of lifting presser foot (C, Fig. 57) to 8mm.
Adjustment is made through the hole (D, Fig.57) by presser bar lifting bracket screw,
after removing rubber stopper from hole. Lower the presser bar lifter (A, Fig. 57),
adjust distance between the position guide (A, Fig. 58) and guide lever (B, Fig. 58) to
12.5mm by guide lever screw, when bottom of lifting presser reaches to needle plate.
km
Fig. 57 Fig. 58
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TIMING OF VIBRATING PRESSER FOOT
To set position of lifting ecoentrio, lower the presser bar lifter (A. Fig. 57). turn
balance wheel toward you to lower needle, and adjust so that vibrating presser reaches
to feed dog, after needle eye has reached to feed dog. To adjust this, remove side
cover plate (A, Fig. 59), loosen screw (A, Fig. 60), move lifting eccentric (B, Fig.
60) to left, then vibrating presser foot reaches to needle plate faster than needle, if
moves to right, it becomes slower.
Amount of lift of vibrating presser foot and lifting presser foot should normally be
equal height. Adjustment is made by screw (B, Fig. 59).
Fig. 59
Fig. 60
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GAUGE
3/16- 1/4- 1/2- 5/8- 3/4- MM" (3/16" to 2-)
1/4" 3/4" (3/16' to 2")
1/4' - 1/4" (1/2" to 2") L B X
1/4' - 1/4' - 1/4'
5/16' - 5/16' - 5/16"
3/8" - 3/8" - 3/8'
1/2' - 1/2" - 1/2'
1/4" - .1" - 1/4'
P- A.. •" • -;Vr.;v • •:, c ^^
Fig. 61
1. When exchanging gauge size.
A. to G must be replace according to the size.
-16-
l. • .l. • -t- °-l
(A =3/4' to 2')
{B=3/16'. • Mimmum)
A. Needle bar thread guard
B. Needle clamp
C. Vibrating presser foot
u tranap narts for instance from D. Lifting presser foot
2. When 0, four needle e. Needle plate
rohine'or vioeversa, needle thread tension p. Feed dog
• -^•r!:e:s=t[:rh::e
!a:Nnrne"dl"'harrusf'b: re"aoe" iradditrrthrs/Tarts'lnTionrd in the
4. When exchanging needle guage to ^
bed plate and bed plate slide must be replaced.
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