Highlead GC2008-M, GC2008-MD User Manual
HIGH
LEAD
GC2008-M/GC2008-
High Speed Lockstitch Sewing Machine
Instruction
Parts
Catalog
Manual
MD
SHANGHAI HUIGONG
N0.3
SEWING MACHINE FACTORY
I.
PRECAUTIONS
I)
Safety
2)
Precaution
3)
Precaution
BEFORE
precautions
before
for
Operating
STARTING
·
Starting
-----CONTENTS-----
OPERATION·
Operation"
Conditions
·
1
1
1
1
2. MAIN
3.
PRECAUTIONS
I)
2) Examination···· ·
3)
4.
REPLACE
5.
NEEDLE,
6.
THREADING
7.
WINDING
8.
SET
9.
POSITION
10.
ADJUST
11.
ADJUSTING
12.
ADJUST
13.
ADJUSTING
14.
ADJUSTING
15.
TIME
SPECIFICATIONS
Cleaning
Oiling
STITCH
THE
THREAD
NEEDLE
AND
LUBRICATION
the
machine
NEEDLES
THREAD
.,.
· · · ·
AND
ADJUSTMENT
LENGTH
PRESSER
BAR··
PRESSURE
OF
UPPER
TENSION·
OF
THREAD
OF
THE
THREAD
TO
ROTATING
..
·
...
MATERIAL
AND
REVERSE
OF
PRESSER
THREAD
· .........
TENSION
TO
TENSION··
··--
GUIDE
HOOK
BE
SEWN
FEEDING·
FOOT · ..
...............
1
2
2
2
2
2
3
3
3
..
..
3
4
4
4
5
5
5
5
1)
Adjusting
2)
Adjusting
16.
REPLACE
17.
ADJUST
18.
ADJUST
19.
TIME
20.
LUBRICATION
21.
REGULAR
SPECIAL
22.
23.
24.
25.
. 1) Position
INSTRUCTION
ADJUSTMENT
REVERSE
THREAD
ADJUSTMENT
2)
Knife
3)
Adjustment
26. PARTS
the
the
ROTATING
THE
HEIGHT
THE
POSITION
FEED
MOTION
CLEANING
OF
SEWING
WIPER
OF
of
fixed
engagement
of
CATALOG·
needle
hook
ADJUSTMENT
position
point
HOOK
OF
OF
TO
NEEDLE
timing·
..
.............. , ............................ ·
FEED
FEED
DOG
DOG
.................................
MOTION
...
·
..
·
OF
GC2008-MD
NEEDLE
BAR
STOP
POSITION
.................................... .,.................... 10
...
,._...
KNIFE
knife
knife
ENGAGEMENT···
· ·
...
amount
.............................................................. , ....................
engagement
pressure
............... ·" ...........................
,...
.,
........ .,.... ......
..................................................... , ........................................ .,..
5
6
6
7
7
8
8
9
9
10
10
10
·10
11
12
A)
Arm
bed
& Its
B)
Needle
bar
accessories
and
thread
..
· .... , ............................ ".... ........
take-up
mechanism
...
12
· 15
C)
Feeding
D)
Stitch
F) Oil
G)
H)
I)
J)
lubrication
Knife
Wiper
Touch
AccessorieS"'"
and
feed lifting & lower
regulator
mechanism
mechanism
mechanism
mechanism·
back
mechanism & Detector
..............
..
shaft
mechanism,.
...........................................
..
mechanism
..........
.,
···
...
18
21
24
26
28
31
33
35
..
1.
PRECAUTIONS
1)
Safety Precautions:
(
1)
When turning the power on, keep your hands and fingers away from the area around/under the needle
and the area around the balance wheel.
Power must
(2)
(3)
Power must
the machine, or when replacing.
(4)
Avoid
placing fingers, hairs, bars etc., near the balance wheel, "V" belt, bobbin winder balance wheel.
or motor when the machine
Do
(5)
not insert fingers into the thread take-up cover, under/around the needle, or balance wheel when the
BEFORE
be
turned
be
off
when the machine
turned off when tilting the machine head, installing
STARTING
is
in
operation.
is
OPERATION
not
in
use, or when the operator leaves the seat.
or
removing the "V" belt, adjusting
machine
(6) If a belt cover, finger guard, eye guard are installed,
devices.
is
in
operation.
2) Precautions before Starting Operation:
(
1)
If the machine's oil pan has
(2) If the machine
(3) When a new sewing machine
the power on. (The balance wheel should rotate counter-clockwise when viewed from the balance
wheel)
Verify
(4)
the voltage and (single or three) phase with those given
is
lubricated
an
oil sump, never operate the machine before
by
a drop oiler, never operate the machine before lubricating.
is
first turned on, verify the rotational direction
3) Precautions for Operating Conditions:
(
1)
Avoid using the machine at abnormally high temperature ( 35'C or higher) or low temperature ( 5
lower)
in
(2) Avoid using the machine
dusty conditions.
2. MAIN SPECIFICATIONS
do
not operate the machine without these safety
fill
ins
it.
of
the balance
on
the machine nameplate.
vvheel
'C
with
or
Item
Material
Max.sewing speed
Stitch length
Needle bar stroke
Presser
I
Reversing mechanism
Trimming mechanism
Touch back mechanism
1
r 1,
..
_____
By hand 6mm
By
1\.nee
,
GC2008-M
0-4mm
T
Light
5000 rpm
I
31.8mm
13mm
DBX 1 #14
-1-
GC2008-MD
0-4mm
I
0
0
0
3. PREPARATION AND LUBRICATION
1)
Cleaning the
machine
Before leaving the factory, the machine parts are coated with rust-preventive grease, which
hardened
and
contaminated
by
dust during storage and shipment. This grease must
gasoline.
2) Examination
Though every machine
may
be
parts
loose or deformed after long distance transportation with jolt. A thorough examination must
performed after cleaning the machine.
collision, uneven resistance or abnormal noise. If these exist, adjustment must
run-in operation.
is
confirmed
by
strict inspection and test before leaving the factory, the machine
Turn
the balance wheel
to
see
3) Oiling (Fig.l)
(I) Required amount
Line
(A)
on
Line
(B)
on
If
oil
level goes down under line (B),
cannot
be
distributed
of
oil
the oil reservoir: Max. Oil level
the
oil
reservoir: Min. Oil level
to
each part
of
the machine,
oil
if
there
may
be
removed
is
running obstruction, parts
be
made accordingly before
be
with
be
thus causing the parts a seizure.
(2)
Replenishing
use
Always
only No.
18
special machine oil for high speed sewing.
before starting operation.
(3)
Replacing
To
replace oil, remove screw (C)
and
securely tighten screw (C), then
4.
REPLACE NEEDLES (Fig.2)
Turn
upper end
(A). While keeping the long groove
IPftw<Jrrl
•
-.-
..
---------.;
oil
fill
the
balance wheel to lift needle bar
of
its
stroke. Loosen needle clamp screw
fJdlv
ino;;prt
thP
-------
nPPrlle sh;Jnk
----
-------
- - - 1
to
the reservoir with fresh oil.
of
bottom of the needle socket. Then tighten needle
clamp screw (A).
Fig.
Note:
(b): insufficient insertion.
Fig.
(c): wrong direction
of
long groove.
Be
sure to replenish
drain oil. After completely draining off oil, clean the
to
the
A
the needle
11n
to
the
a
Long
groove
oil
oil
to
line (A)
reservoir
2
-2-
5.
NEEDLE,
THREAD
Needle Size Thread Number Material
No.9 No. I 00-
No.I
I
No.l4
No.16
6.
THREADING (Fig.3)
AND MATERIAL
No.80
No.80No.60No.SO-
No.60
No.SO cotton, light, woolen
No.30
TO
BE
SEWN
crepe, georgette, organdie
silk, muslin, poplin
woolen, tarpaulin, thin leather
Raise the thread take-up lever to its highest position and thread the upper thread
3
(7)
Left
to
right
in
the following order.
4
2
7.
WINDING
I) Put an empty bobbin
2)
Push the bobbin catch
3) The bobbin is filled
4) The
bobbinet
5) The tension
8. SET
STITCH
I) Stitch length can be
2) The figures on face
3) Reverse feeding starts
ADJUSTMENT
onto
the
bobbin
in
the direction
during
stops automatically
of
the thread
LENGTH
(B)
the progress
when
on
the bobbin can be adjusted with knurl-screw 2.
AND REVERSE
set
by turning dial (A).
of
dial
show
when
reverse feed lever
(Fig.4)
shaft and thread the thread according to Fig 4
of
the arrow
of
the sewing.
the bobbin
is
full.
FEEDING
stitch length in mm.
(C)
is
depressed,
and
3
(Fig.5)
the machine will feed forward again
if
reverse feed lever (C)
is
released.
6
9.
POSITION
I) Loosen lock nut (E) and pressure regulating thumb screw (A).
2) Remove Rubber
3) Loosen screw (C) and adjust the position
plate
wi
II
the presser foot lifted to its highest.
4) Tighten screw (C) and put
5) Tighten pressure regulating thumb screw (A) and lock nut (E).
10. ADJUST
Pressure
11.
ADJUSTING
I) Upper thread tension can be adjusted by thread tension nut.
2) Upper thread
3) For special fabric
PRESSER
Plug
THE
of
the presser foot can be adjusted by turning the pressure regulating thumb screw.
PRESSURE
OF
is
to be adjusted according to the lower thread tension.
sewing
BAR
from face plate (B).
in
the rubber plug.
UPPER
with special thread, the desired tension can be obtained by adjusting the
(Fig.6)
of
Presser Bar till the presser foot is 6 mm above the throat
OF
PRESSER
THREAD TENSION (Fig.8)
FOOT
---'--....,.--
(Fig.7)
6mm
of
strength and operating range
For light weight
material
(weaken) .
~
~
.,
c=
thread take-up spring.
For heavy material
(strengthen)
__
---
Pressure regulat1ng
thumb screw
7
-4-
Thread
tension
nut
Strengthen
8
12. ADJUST
(Fig.9, 10)
THREAD
TENSION
9
I) Lower thread tension can be adjusted
screw (A).
2)
In
the case
tension can
of
pulled out thread and
the tension
13.
ADJUSTING
be
is
proper.
TENSION
of
cotton thread #60, the thread
checked as the following. Hold the end
if
the bobbin case fall slowly,
OF
THREAD
(Fig.ll)
0
?;?~
switch
~
~~~
by
X
In
case upper thread
is too strong or
thread
is
too weak
~
lower
X
6:~
In
case upper thread
is
too weak or lower
thread
ts
too strong
10
14.
ADJUSTING
The position
stitch tightness and therefore must
according to sewing materials and sewing
conditions.
15.
TIME
1)
Adjusting
(I)
(2) Remove rubber plug from face plate (A).
(3) Loosen set screw (B)
(4) Move needle bar (C) vertically to adjust needle timing.
(5) After the adjustment, tighten set screw (B) and put
(Fig.l3)
align the inner surface (E)
lowest position.
NEEDLE
the
Turn balance wheel
is
to align timing mark (B) on the needle bar and the bottom
OF
THE
of
the thread guide affects
TO
THREAD
be
adjusted
ROTATING
needle position (Fig.12, 13)
by
hand to bring needle bar (C) to the lowest position
of
needle bar adaptor.
of
the hook and the center
GUIDE
Thread guide position
Material weight
HOOK
of
(Fig. 12, 13, 14, 15)
in
the rubber plug. The standard needle timing
of
needle eye (D) when the needle bar gets down
I
Leftward
Heavy Medium
of
its
needle bar bushing (A) and meanwhile
1
stroke.
2
Center
3
Rightward
Light
to
its
I
I
I
-5-
2)
Adjusting
the
hook point timing (Fig.14, 15)
12
13
D
--r-7-z:;:;~!S:
E---.-,.,~-+'
Timing
hook point timing (Fig.l4)
2.2mm from the lower end
needle eye (E).
When
and
hook
of
needle motion
adjusting the hook point timing, also notice that the clearance between the bottom
point (C) should
A
to
rotating hook motion has a great effect
is
to
align hook point (D)
of
its
stroke. Besides, hook point (D) should
be
approx. 0.05mm (Fig. IS)
c---.1!1
1.
0-1.
5mm
14
on
sewing performance. The standard
and
needle centerline (C) when needle bar (B)
be
1.0-I.Smm above the upper
0.05mm
of
is
lifted
nPedle
end
notch
15
by
of
16.
REPLACE
ROTATING
HOOK
(Fig.16)
I) Lift needle bar
stroke.
2)
Remove throat plate, take down needle and
bobbin case.
3)
Loosen screw (C)
take down hook positioner (A).
4)
Loosen two screw (D)
to
the highest position
of
hook positioner and
of
rotating hook.
of
-6-
its
16
D
----c
5) Turn the balance
it
turning
away from feed bar.
wheel
to raise feed
bar
to its highest position, then
take
down
the rotating hook by
6) Installing the
hook
positioner
(A)
17. ADJUST
I) Turn the
2) Loosen
3)
Move
feed bar
dog.
The
standard height
Fig.
IS)
4)
After
the adjustment, be sure to tighten
should
THE
balance
screw
hook
can
align with a
HEIGHT
wheel
(A)
of
feed lifting
(B)
in the direction
of
feed
be
done
clearance
OF
until feed
dog
is
that
in
reverse sequence.
of
0.5-0.7mm
Note
that
between
FEED DOG (Fig.17, 18)
dog
is lifted to its highest position from
rock
shaft
crank
right
(See
Fig.l7,
shown
the top
screw
17
by the
of
feed
(A).
arrow
dog
in
is
0.8mm
Fig.l9
needle
them.
(B) and the
throat
plate surface.
b)
(a) to adjust the height
above
throat
plate surface (B). (See
convex
surface
of
the feed
of
19
:
ZZI~ZZZ~~mm
18,
ADJUST
The standard position
of
first tooth
I) Fully
the fully
advance
THE
advanced
the feed
A
POSITION
of
feed
dog
is
feed
dog
is 0.8 mm, as
dog
toward
b
18
OF
FEED DOG (Fig.19, 20)
that
the clearance
the
front end
between
shown
of
the
in
Fig.l9.
throat
a
the front
plate slot.
end
A
b
of
the throat plate slot and the
2) Loosen feed rock shaft
3)
Move
feed
bar
(B)
After
4)
the adjustment, be sure
in
crank
the
direction
screw
(A). See Fig.20 (b).
shown
to
tighten
Screw
by the
(A).
arrow
in Fig.
20
(a) to adjust the feed
-7-
dog
position.
19.
TIME
FEED
MOTION
TO
NEEDLE
MOTION
(Fig.21, 22)
The standard timing
surface (B) when the point
If
feed motion
1)
Remove
2) Loosen set screws (A) and (D)
3) Hold feed and feed lifting eccentric (B) and turn balance wheel
shaft oil hole
hole (G)
feed lifting eccentric (B) and eccentric sleeve (H), then
tighten set screws (A) and (D).
of
4) Leave a clearance
ann
(C) aligns with the lower
feed and feed lifting eccentric.
offeed
is
not timed to needle motion, adjust as follows (Fig.21 and Fig.22).
side
cover
of
motion to needle motion
of
needle (A) reaches throat plate surface (B). (Fig.21.)
(F).
of
feed and feed lifting eccentric.
edge
of
reference
0.3-0.Smm between feed and
is
that the top
22
H
c
of
feed
dog
(C)
is
flush with throat plate
(E)
slowly until the upper edge
B A H
c
of
arm
21
D
20. LUBRICATION
Adjusting the lubrication
Oil adjusting screw (A) can adjust the lubrication
the rotating hook as follows:
I) Turn oil adjusting screw
increase oil and turn oil
counter-clockwise to decrease oil.
Oil adjusting screw (A) adjusts oil amount within
2)
5 turns. When oil adjusting screw
oil amount
is
maximum.
ADJUSTMENT
of
rotating hook.
(A)
adjusting
(A)
is
fully tightened,
(Fig.23)
of
clockwise to
screw (A)
D
A
23
3) Readjustment depends on temperature, sewing
speed and the like.
paper on instead, run the machine for
In
practice, oil
amount
about
can be
judged
20 seconds, then
as follows: remove the throat plate and place a piece
check
the oil splashed on the paper.
-8-
of
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