HIGHLEAD GC1870-M User manual
HIGH
LEAD
GC1870-M
High Speed Single Needle
Lockstitch
Industrial
Sewing
machine
Instruction Manual
Parts Catalog
SHANGHAI HUIGONG
N0.3
SEWING MACHINE FACTORY
From the library of: Superior Sewing Machine & Supply LLC
From the library of: Superior Sewing Machine & Supply LLC
HIGH
LEAD
GC1870-M
High Speed Single Needle Lockstitch
Industrial
Sewing
machine
Instruction
Manual
Parts
Catalog
SHANGHAI HUIGONG
N0.3
SEWING MACHINE FACTORY
From the library of: Superior Sewing Machine & Supply LLC
From the library of: Superior Sewing Machine & Supply LLC
-----CONTENTS-----
BEFORE OPERATOR · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·1
OPERATION PRECAUTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1
1.
INSTALLATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·1-2
2.
LUBRICATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·2-3
3.
ADJUSTING
THE
AMOUNT
OF
OIL
SUPPLIED TO
THE
HOOK
· · · · · · · · · · · · · · · · · · · · · · · · ·
·3-4
4.
ATTACHING THE NEEDLE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4
5.
SETTING
THE
BOBBIN INTO
THE
BOBBIN CASE ·
..
·
..
· · ·
....
· · ·
..
· · · ·
........
· · · · · · · ·
-5
6.
THREADING
THE
MACHINE
HEAD···················································
-5
7.
ADJUSTING
THE
STITCH LENGTH
....................
· ·
..
· · ·
........
· · ·
......
· ·
....
·
-6
8.
THREAD TENSION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
-6-7
9.
THREAD TAKE-UP SPRING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·7
10.
HAND
LIFTER·······································································
8
11.
PRESSER FOOT PRESSURE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
-8
12.
ADJUSTING
THE
FEED TIMING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
-8-9
13.
HEIGHT
OF
THE
FEED DOG · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
-9
14.
NEEDLE-TO-HOOK RELATIONSHIP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·10
15.
ADJUSTING
THE
HEIGHT
OF
THE
PRESSER BAR · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·11
16.
ADJUSTING
THE
THREAD TAKE-UP STROKE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·11
17.
INSTALLING THE BELT
COVER
AND
THE
BOBBIN WINDER · · · · · · · · · · · · · · · · · · · · · · · ·
·11-12
18.
ASJUSTING THE
HEIGHT
OF
THE
KNEE
LIFTER
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
·13
-----PARTS LIST-----
A.
ARM BED COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·14-15
B.
MAIN SHAFT & THREAD TAKE-UP
COMPONENTS·································
·16-17
C. NEEDLE BAR & THREAD TENSION COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·18-19
D.
PRESSER BAR COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 20-21
E.
HOOK
DRIVING SHAFT COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 22-23
F. FEED MECHANISM COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·24-26
G.
FEED REGULATING COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·27-28
H.
LUBRICATION COMPONENTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·29-30
I.
OIL
RESERVOIR & KNEE
LIFTER
COMPONENTS··································
·31-32
J.
MACHINE HEAD ACCESSORIES(
1)
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·33-34
K. MACHINE HEAD
ACCESSORIES(2)
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·35-36
From the library of: Superior Sewing Machine & Supply LLC
From the library of: Superior Sewing Machine & Supply LLC
BEFORE
OPERATION
1.
Never operate the machine unless its oil pan has been filled with oil.
2.
After setting up the machine, check the direction
of
motor rotation.
To
check it, turn the hand-wheel by
hand to bring the needle down, and tum the power switch ON while observing the hand-wheel. (The
hand-wheel should
tum
counterclockwise as observed from the hand-wheel side.)
3.
Do
not use a larger motor pulley for the first month
..
4.
Confirm that the voltage and phase (single or 3-phase) are correct by checking them against the ratings
shown on the motor nameplate.
OPERATION
PRECAUTIONS
1. Keep your hands away from the needle when you
tum
the power switch
ON
or
while the machine
is
operating.
2.
Do
not put your fingers into the thread take-up cover while the machine
is
operating.
3.
Be
sure to turn the power switch OFF before tilting the machine head or removing the V belt.
4.
When an operator leaves from the machine, make sure to
tum
off
the power.
5.
During operation, be careful not to allow your or any other person's head
or
hands to come close to the
hand-wheel, V belt, bobbin winder or motor. Also, do not place anything close to them. Doing so maybe
dangerous.
6.
If your machine
is
provided with a belt cover, finger guard or any other protectors, do not operate your
machine with any
of
them removed
7.
Don't clean the face
of
machine head with thinner.
!.INSTALLATION
(Fig.l,
Fig.2, Fig.3, Fig.4)
• Installing the oil
pan
1) The oil pan should rest
on
the four comers
of
the machine table groove.
2)
Fix two rubber seats
CD
on side A (operator's side) using nails ® as illustrated above. Fix two cushion
seats ® on side B(hinged side)using nails
®.
Then place oil pan ® on the fixed seats. (Fig.l, Fig.2)
3)
Fix hinge
CD
into the opening in the machine bed, and fit the machine head to table rubber hinge ®
before placing the machine head on cushions ® on the
foUi
comers.(Fig.3, Fig4)
-1-
From the library of: Superior Sewing Machine & Supply LLC
CD
Fig 1
2.LUBRICATION (Fig.5, Fig.6)
e Information on lubrication (Fig.5)
Before starting the machine
CD
Fig.3
Fig.4
1) Fill oil pan
CD
with sewing machine oil
(1
0 white oil)
up
to HIGH mark A.
Fig 2
2)
When the oil level lowers below LOW mark B, refill the oil pan with the specified oil.
-2-
From the library of: Superior Sewing Machine & Supply LLC
3) When you operate the machine after lubrication, you will see splashing oil through oil sight widow @
if
the lubrication
is
adequate.
4)
Note that the amount
of
the splashing oil
is
unrelated to the amount
of
the lubricating oil.
Precaution
When you first operate
your
machine
after
set up
or
after
an extended period
of
disuse, run your
machine
at
3000s.p.m. to 3500s.p.m. for about 10 minutes for the
purpose
of
break-in.
• Adjusting the
amount
of
oil supplied to
the
face plate
parts
(Fig.6)
1)
Adjusting the amount
of
oil supplied to the thread take-up and needle bar crank @ by turning adjust pin
CD.
2)
The minimum amount
of
oil
is
reached when marker dot A
is
brought close to needle bar crank @
by
turning the adjust pin
in
direction
B.
3) The maximum amount
of
oil
is
reached when marker dot A is brought to the position just opposite from
the needle bar crank by turning the adjust pin
in
direction C.
Fig.S Fig.6
3.ADJUSTING
THE
AMOUNT
OF
OIL
SUPPLIED
TO
THE
HOOK
(Fig.7,
Fig.8, Fig.9)
I) After cooling, the machine may be idling for three minutes (operating continued properly). (Fig.7)
2) The amount
of
oil confirmed paper must be inserted
in
the state when the machine
is
operating.
3) Oil
in
the oil pan
is
confirmed within HI and LOW.
4) The amount
of
oil confirmed is for five seconds (please use the clock with the second).
e The
proper
amount
of
oil
manual
(Fig.8)
I) The amount
of
oil can be adjusted according to the different sewing process but it must
be
suitable
amount.
• Otherwise the hook will generate heat
or
the sewing material will be contaminated.
2)
Use
the amount
of
confirmed paper for three times to observe the amount
of
oil. Adjust the screw until the
mark on the paper
hasn't
changed.
-3-
From the library of: Superior Sewing Machine & Supply LLC
e Adjusting the
amount
of
oil supplied to the hook (Fig.9)
I) More oil
is
supplied as oil amount adjust screw mounted on the hook driving shaft
is
turned toward +
in
direction
A.
As the oil amount adjusted screw
is
turned
toward-
in direction
B,
the amount
of
oil supplied
will be decreased.
2) After adjusted, the machine must be idling for thirty seconds.
It
can
be confirmed the state
of
oil supplied.
CD
The
amount
of
oil comfirmed
paper
®
The
place
of
confirmed
Hook Bushing
The
amount
of
Oil reservoir
oil confirmed
paper
Fig. 7
Fig. 9
4.ATTACHING
THE
NEEDLE (Fig.10)
e Turn the
motor
power
OFF
before
starting
to attach
the
needle.
The amount
of
oil
Min
The
amount
of
oil
/
2mm
Max
Fig. 8
A needle
of
DB X 1#14 should be used. Select a proper needle size according to the count
of
thread and
the type
of
material used.
I)
Tum the hand-wheel until the needle bar reaches the highest point
of
its stroke.
2) Loosen screw
@,
and hold needle
CD
with its indented part A facing exactly to the right
in
direction
B.
3) Insert the needle in the direction
of
the arrow until it will go on further.
4) Securely tighten screw @.
5)
Check that long groove C
of
the needle
is
facing exactly to the left in direction D.
®
..
_:___~_
-
-----
-4-
From the library of: Superior Sewing Machine & Supply LLC
S.SETTING
THE
BOBBIN INTO
THE
BOBBIN CASE
I ) Hold the bobbin
in
a way that the thread open end is directed to the left as observed from you, and set the
bobbin into the bobbin case.
2)
Pass the thread through thread slit A, and pull the thread in direction B.
By
so doing, the thread will pass
under the tension spring and come out from notch
B.
3)
Check that the bobbin rotates in the direction
of
the arrow when thread C is pulled.
Fig.
II
6.THREADING
THE
MACHINE HEAD (Fig.12)
Fig.l2
-5-
From the library of: Superior Sewing Machine & Supply LLC
7.
ADJUSTING
THE
STITCH
LENGTH
(Fig.13)
I ) Turn stitch length dial
CD
in the direction
of
the arrow, and align the desired number to marker dot A on
the machine arm.
2)
The dial calibration is in millimeters.
3)
When you want to decrease the stitch length, turn stitch length dial
CD
while pressing feed lever ® in
the direction
ofthe
arrow.
Fig.l3
8.THREAD TENSION (Fig.14)
1.
Adjusting the needle
thread
tension
I ) Adjust the needle thread tension using tension adjust nut
CD
according to the sewing specifications.
2)
As you turn nut
CD
clockwise (in direction A), the needle thread tension will increase.
3) As you turn nut
CD
counterclockwise (in direction B), the needle thread tension will decrease.
2.
Adjusting the
bobbin
thread
tension
1)
As you turn tension adjust screw ® clockwise (in direction C),
the
bobbin thread tension will increase.
2) As you turn tension adjust screw ® counterclockwise (in direction D),the bobbin thread tension will
decrease.
-6-
From the library of: Superior Sewing Machine & Supply LLC
-···--
Fig.l4
9.
THREAD TAKE-UP
SPRING
(Fig.15)
1.
Changing the stroke
of
thread
take-up
spring
CD:
I ) Loosen set screw @ o
2)
As you turn tension post ® clockwise (in direction A), the stroke
of
the thread take-up spring will be
increased.
3)
As you turn the knob counterclockwise (in direction B), the stroke will be decreased.
2.
Changing the pressure
of
thread
take-up
spring
CD:
I ) Loosen setscrew
@,
and take out tension asm @.
2)
Loosen setscrew
@,
and remove tension post
®.
3)
As you turn tension post ® clockwise (in direction A), the pressure will be increased.
4)
As you turn tension post ® counterclockwise (in direction B), the pressure will be decreased.
Fig. IS
-7-
@
I
CD
From the library of: Superior Sewing Machine & Supply LLC
1
O.HAND
LIFTER
(Fig.16)
I)
To
stop the machine with its presser foot up, tum
h&nd
lifter
CD
in
direction A.
2) The presser foot will go up about 5.5mm and stop.
3) The presser foot will go back to its original position when hand lifter
CD
is
turned down
in
direction
B.
4) Using the knee lifter, you can get the standard presser foot lift
of
about 1
Omm
and a maximum lift
of
about 13mm.
Fig.16
11.PRESSER
FOOT
PRESSURE (Fig.17)
I) Loosen nut
®.As
you
tum
presser spring regulator
CD
clockwise (in direction A),the presser foot
pressure will be increased.
2) As you tum the presser spring regulator counterclockwise (in direction B), the presser foot pressure
will
be decreased.
3) After adjustment, tighten nut
®a
4) For general fabrics, the standard height
of
the presser spring regulator is 29 to 32mm(5kg).
II
I I
Fig.17
12.ADJUSTING THE FEED TIMING (Fig.18)
-
---
·---
-
1) Loosen two setscrews ® and @ on feed eccentric cam
CD,
properly position the eccentric cam. Then
retighten the setscrews.
-8-
From the library of: Superior Sewing Machine & Supply LLC
2)
To
obtain the standard feed timing, when the feed dog
is
dropping from the throat plate, align the top
of
the feed dog with the top
of
the hole on the needle and the top
of
the throat plate.
3 )
To
advance the feed timing in order to prevent uneven material feed, move the feed eccentric cam in the
direction
of
the arrow.
4)
To
delay the feed timing in order to increase stitch tightness, move the feed eccentric cam in the opposite
direction from the arrow.
e
If
moving the feed eccentric cam to far, the needle will be break.
Standard
~mr
Advanced
~cz
~or=+=
Fig. IS
13.HEIGHT
OF
THE
FEED
DOG (Fig.19)
I ) The feed dog
is
factory-adjusted so that it juts out from the throat plate surface 0.8mm to 0.9mm.
2)
If
the feed dog juts out too much, puckering may result when sewing light-weight materials.
(Recommended protrusion: 0.7mm to 0.8mm)
3)
To
adjust the height
of
the feed dog:
CD
Loosen screw ®
of
crank
CD.
® Move the feed bar up or down to make adjustment.
® Securely tighten screw ®.
e Precaution:
If
the
screw is tightened too securely,
the
crank
will
be
abraded.
0. 75-0.
85nm
I
ma~
b
a Feed dog
b Throat plate
Fig.l9
-9-
From the library of: Superior Sewing Machine & Supply LLC
14.NEEDLE-TO-HOOKRELATIONSHIP (Fig.20)
• Adjust the timing between the needle
and
the hook as follows:
1)
Turn the hand-wheel to bring the needle bar down to the lowest
point
of
its stroke, and loosen setscrew
CD.
2) Adjusting the needle bar height
When using the needle
of
DB X I, align marker line A on needle
bar
® with the bottom end
of
needle
bar lower bushing
@,
then tighten setscrew
CD.
When using the needle
of
DA
X I, align marker line B with it, then tighten setscrew
CD.
3) Adjusting position
of
the hook
When using the needle
of
DB X I, loosen the three hook setscrews, turn the hand-wheel, and align
marker line
Bon
the needle bar ® with the bottom end
of
needle
bar
lower bushing @.
When using the needle
of
DA X I, align marker line D on the needle bar ® with the bottom end
of
needle bar lower bushing @.
4) After making the adjustments mentioned in the above steps align hook blade point @ with the center
of
needle @. Provide a clearance
of
0.04mm to
O.I
mm between the needle and the hook, then securely,
tighten the hook setscrews.
• Precaution:
If
the
clearance
is
too small, the tip
of
the
hook
will be
abraded.
If
it
is
too
big, it will lead to skip over.
• Note
that
the type
of
hook
to be substituted for, when replacing the hook, shall be
in
conformity with the very type
of
the hook installed in
the
sewing machine
of
original
assemblage.
Fig.20
-
10-
From the library of: Superior Sewing Machine & Supply LLC
3)
Install the front belt cover
®,get
the hand-wheel in the middle
of
the hole.
4)
Install the front belt cover ® at C and D.
5)
Using the screw ®,® and washer
@,
fix the front belt cover @ on the support the tight torque for the
screw ®
is
about 30kgf.cm, for the screw @
is
about 25kgf.cm.
6)
Fix the cover.
7)
Move the back belt cover ® backward until its rubber touches the front belt cover
®,
then move further
more 0.5-Imm, fix
it
using the wooden screws and washers.
8)
Fix bobbin winder @ at A and B using the wooden screws.
Fig.23
Fig.24
-
12-
47
6~.
~
75.5
Fig.25
From the library of: Superior Sewing Machine & Supply LLC
15.ADJUSTING
THE
HEIGHT
OF
THE
PRESSER
BAR
(Fig.21)
I)
Loosen setscrew
CD,
and adjust the presser bar height and the angle
of
the presser foot.
2)
After adjustment, securely tighten the setscrew.
Fig.21
16.ADJUSTING
THE
THREAD
TAKE-UP
STROKE
(Fig.22)
1)
When sewing heavy-weight materials, move thread guide
CD
to the left
in
direction A to increase the
length
of
thread pulled out by the thread take-up.
2)
When sewing light-weight materials, move thread guide
CD
to the right in direction B to decrease the
length
of
thread pulled out by the thread take-up.
3) When the marker line
Con
the thread guide
CD
is
aligned with the center
of
the screw,
it
is
standard.
Fig.22
17.INSTALLING
THE
BELT
COVER
AND
THE
BOBBIN
WINDER
(Fig.23,
Fig.24, fig.25)
Installing procedure
I)
Drill four wooden screw guide holes A, B, C and
Din
the machine table.
2)
Insert support
CD
in the tapped hole in the arm.
-11-
From the library of: Superior Sewing Machine & Supply LLC
18.ADJUSTING THE HEIGHT OF THE KNEE LIFTER (Fig.26, Fig.27)
1)
The standard height
ofthe
presser foot lifted using the knee lifter
is
IOmm.
2)
You
can adjust the presser foot lift up to 13mm using knee lifter adjust screw
CD.
3)
When you have adjusted the presser foot lift to over I
Omm,
be sure that the bottom end
of
needle bar ®
in
its
lowest position does not hit presser foot @.
Fig.26 Fig.27
-
13-
From the library of: Superior Sewing Machine & Supply LLC
A.ARM
BED
COMPONENTS
~3
UJ
.
-14-
From the library of: Superior Sewing Machine & Supply LLC
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