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
From the library of: Superior Sewing Machine & Supply LLC

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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From the library of: Superior Sewing Machine & Supply LLC