HIGHLEAD GC2008-M User manual

HIGH LEAD
GC2008-M/GC2008- MD
High Speed Lockstitch 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-----
I. PRECAUTIONS BEFORE STARTING OPERATION·
I) Safety precautions ·
2) Precaution before Starting Operation"
3) Precaution for Operating Conditions ·
2. MAIN SPECIFICATIONS .. ·
3. PRECAUTIONS AND LUBRICATION
I) Cleaning the machine ...
2) Examination···· ·
3) Oiling
4. REPLACE NEEDLES
5. NEEDLE, THREAD AND MATERIAL TO BE SEWN
6. THREADING .,. · · · ·
7. WINDING ADJUSTMENT
8. SET STITCH LENGTH AND REVERSE FEEDING· ..
9. POSITION PRESSER BAR··
10. ADJUST THE PRESSURE OF PRESSER FOOT · ..
11. ADJUSTING OF UPPER THREAD TENSION··
12. ADJUST THREAD TENSION· · ......... ··-- ............... ..
13. ADJUSTING OF THREAD TENSION
14. ADJUSTING OF THE THREAD GUIDE
15. TIME NEEDLE TO ROTATING HOOK
1) Adjusting the needle position
2) Adjusting the hook point timing· ..
16. REPLACE ROTATING HOOK .............., ............................ ·
17. ADJUST THE HEIGHT OF FEED DOG
18. ADJUST THE POSITION OF FEED DOG ................................. ..
19. TIME FEED MOTION TO NEEDLE MOTION
20. LUBRICATION ADJUSTMENT ... ·
21. REGULAR CLEANING ·
SPECIAL INSTRUCTION OF GC2008-MD
1
1
1
1
1
2
2
2
2
2
3
3
3
3
4
4
4
5
5
5
5
5
6
6
7
7
8
8
9
22.
ADJUSTMENT OF NEEDLE BAR STOP POSITION 9
23.
REVERSE SEWING .....................................,.................... 10
24.
THREAD WIPER ... ,._... 10
25. ADJUSTMENT OF KNIFE ENGAGEMENT··· 10
. 1) Position of fixed knife · · ... 10
2) Knife engagement amount .............................................................., .................... ,... ·10
3) Adjustment of knife engagement pressure ............... ·"........................... ., ........ .,.... ...... 11
26. PARTS CATALOG· ....................................................., .........................................,.. 12
A) Arm bed & Its accessories .. · ...., ............................".... ........ ... 12
B) Needle bar and thread take-up mechanism · 15
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From the library of: Superior Sewing Machine & Supply LLC

C) Feeding and feed lifting & lower shaft mechanism,. .......... ···
D) Stitch regulator mechanism ........................................... .,
F) Oil lubrication mechanism
G) Knife mechanism .............. ..
H) Wiper mechanism· ..
I) Touch back mechanism & Detector mechanism
J) AccessorieS"'"
18
21
... 24
26
28
31
33
35
From the library of: Superior Sewing Machine & Supply LLC

..
From the library of: Superior Sewing Machine & Supply LLC

1. PRECAUTIONS BEFORE STARTING OPERATION
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.
(2) Power must
be turned off when the machine is not in use, or when the operator leaves the seat.
(3) Power must
be turned off when tilting the machine head, installing or removing the "V" belt, adjusting
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
is in operation.
(5)
Do not insert fingers into the thread take-up cover, under/around the needle, or balance wheel when the
machine
is in operation.
(6) If a belt cover, finger guard, eye guard are installed,
do not operate the machine without these safety
devices.
2) Precautions before Starting Operation:
( 1) If the machine's oil pan has an oil sump, never operate the machine before fill ins it.
(2) Ifthe machine is lubricated by a drop oiler, never operate the machine before lubricating.
(3) When a new sewing machine
is first turned on, verify the rotational direction of the balance vvheel with
the power on. (The balance wheel should rotate counter-clockwise when viewed from the balance
wheel)
(4)
Verify the voltage and (single or three) phase with those given on the machine nameplate.
3) Precautions for Operating Conditions:
( 1) Avoid using the machine at abnormally high temperature (35'C or higher) or low temperature (5 'C or
lower)
(2) Avoid using the machine
in dusty conditions.
2. MAIN SPECIFICATIONS
Item GC2008-M T GC2008-MD
Material Light
Max.sewing speed 5000 rpm
Stitch length 0-4mm I 0-4mm
Needle bar stroke 31.8mm
I 1 By hand 6mm I
Presser r 1,
By 1\.nee
13mm
.. _____ , DBX 1#14
Reversing mechanism 0
Trimming mechanism 0
Touch back mechanism 0
-1-
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3. PREPARATION AND LUBRICATION
1) Cleaning the machine
Before leaving the factory, the machine parts are coated with rust-preventive grease, which may be
hardened and contaminated by dust during storage and shipment. This grease must be removed with
gasoline.
2) Examination
Though every machine is confirmed by strict inspection and test before leaving the factory, the machine
parts
may be loose or deformed after long distance transportation with jolt. A thorough examination must be
performed after cleaning the machine. Turn the balance wheel to see if there is running obstruction, parts
collision, uneven resistance or abnormal noise. If these exist, adjustment must
be made accordingly before
run-in operation.
3) Oiling (Fig.l)
(I) Required amount of oil
Line (A) on the oil reservoir: Max. Oil level
Line (B) on the oil reservoir: Min. Oil level
If
oil level goes down under line (B), oil
cannot be distributed to each part of the machine,
thus causing the parts a seizure.
(2) Replenishing
Always
use only No. 18 special machine oil for high speed sewing. Be sure to replenish oil to line (A)
before starting operation.
(3) Replacing oil
To replace oil, remove screw (C) to drain oil. After completely draining off oil, clean the oil reservoir
and securely tighten screw (C), then fill the reservoir with fresh oil.
4. REPLACE NEEDLES (Fig.2)
Turn the balance wheel to lift needle bar to the
upper end
of its stroke. Loosen needle clamp screw
(A). While keeping the long groove
of the needle
IPftw<Jrrl fJdlv ino;;prt thP nPPrlle sh;Jnk 11n to the
• -.- .. ---- - ----.; ------- ---- ------- - - - 1
bottom of the needle socket. Then tighten needle
clamp screw (A).
Note:
Fig. (b): insufficient insertion.
Fig. (c): wrong direction of long groove.
Long groove
-2-
2
A
a
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5. NEEDLE, THREAD AND MATERIAL TO BE SEWN
Needle Size Thread Number Material
No.9 No. I00- No.80 crepe, georgette, organdie
No.I I No.80- No.60 silk, muslin, poplin
No.l4 No.60- No.SO cotton, light, woolen
No.16 No.SO- No.30 woolen, tarpaulin, thin leather
6. THREADING (Fig.3)
Raise the thread take-up lever to its highest position and thread the upper thread in the following order.
3 4
(7)
2
Left to right
7. WINDING ADJUSTMENT (Fig.4)
I) Put an empty bobbin onto the bobbin shaft and thread the thread according to Fig 4
2) Push the bobbin catch
in the direction of the arrow
3) The bobbin is filled
during the progress of the sewing.
4) The
bobbinet stops automatically when the bobbin is full.
5) The tension
of the thread on the bobbin can be adjusted with knurl-screw 2.
8. SET STITCH LENGTH AND REVERSE FEEDING (Fig.5)
I) Stitch length can be set by turning dial (A).
2) The figures on face
(B) of dial show stitch length in mm.
3) Reverse feeding starts
when reverse feed lever (C) is depressed, and the machine will feed forward again
3
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if reverse feed lever (C) is released.
6
6mm
9. POSITION PRESSER BAR (Fig.6)
---'--....,.--
I) Loosen lock nut (E) and pressure regulating thumb screw (A).
2) Remove Rubber
Plug from face plate (B).
3) Loosen screw (C) and adjust the position of Presser Bar till the presser foot is 6 mm above the throat
plate wi II the presser foot lifted to its highest.
4) Tighten screw (C) and put in the rubber plug.
5) Tighten pressure regulating thumb screw (A) and lock nut (E).
10. ADJUST THE PRESSURE OF PRESSER FOOT (Fig.7)
Pressure of the presser foot can be adjusted by turning the pressure regulating thumb screw.
11. ADJUSTING OF UPPER THREAD TENSION (Fig.8)
I) Upper thread tension can be adjusted by thread tension nut.
2) Upper thread is to be adjusted according to the lower thread tension.
3) For special fabric
sewing with special thread, the desired tension can be obtained by adjusting the
strength and operating range
of thread take-up spring.
For light weight ~ For heavy material
material
~ ., (strengthen)
(weaken) .
c= __ Pressure regulat1ng
--- thumb screw
7
-4-
Thread
tension nut
Strengthen
8
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12. ADJUST THREAD TENSION
(Fig.9, 10)
I) Lower thread tension can be adjusted by
screw (A).
2) In the case of cotton thread #60, the thread
tension can be checked as the following. Hold the end
of pulled out thread and if the bobbin case fall slowly,
the tension is proper.
13. ADJUSTING OF THREAD
TENSION (Fig.ll)
0 X
?;?~
~ ~
~~~
In case upper thread
is too strong or lower
thread is too weak
switch
14. ADJUSTING OF THE THREAD GUIDE
The position of the thread guide affects
stitch tightness and therefore must be adjusted
according to sewing materials and sewing
conditions.
Thread guide position
Material weight
X
6:~
In case upper thread
I
is too weak or lower
thread ts too strong
2
Leftward 1 Center
Heavy Medium
15. TIME NEEDLE TO ROTATING HOOK (Fig. 12, 13, 14, 15)
1) Adjusting the needle position (Fig.12, 13)
(I) Turn balance wheel by hand to bring needle bar (C) to the lowest position of its stroke.
(2) Remove rubber plug from face plate (A).
(3) Loosen set screw (B) of needle bar adaptor.
(4) Move needle bar (C) vertically to adjust needle timing.
9
10
3
Rightward
Light
(5) After the adjustment, tighten set screw (B) and put in the rubber plug. The standard needle timing
(Fig.l3) is to align timing mark (B) on the needle bar and the bottom of needle bar bushing (A) and meanwhile
align the inner surface (E) of the hook and the center of needle eye (D) when the needle bar gets down to its
lowest position.
-5-
I
I
I
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12
13
D --r-7-z:;:;~!S:
E---.-,.,~-+'
2) Adjusting the hook point timing (Fig.14, 15)
Timing of needle motion to rotating hook motion has a great effect on sewing performance. The standard
hook point timing (Fig.l4) is to align hook point (D) and needle centerline (C) when needle bar (B) is lifted by
2.2mm from the lower end of its stroke. Besides, hook point (D) should be 1.0-I.Smm above the upper end of
needle eye (E).
When adjusting the hook point timing, also notice that the clearance between the bottom of nPedle notch
and hook point (C) should be approx. 0.05mm (Fig. IS)
14
c---.1!1 1. 0-1. 5mm
A
16. REPLACE ROTATING HOOK
(Fig.16)
I) Lift needle bar to the highest position of its
stroke.
2) Remove throat plate, take down needle and
bobbin case.
3) Loosen screw (C) of hook positioner and
take down hook positioner (A).
4) Loosen two screw (D) of rotating hook.
-6-
15
0.05mm
16
D
----c
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5) Turn the balance wheel to raise feed bar to its highest position, then take down the rotating hook by
turning
it away from feed bar.
6) Installing the
hook can be done in reverse sequence. Note that needle (B) and the convex surface of
hook positioner (A) should align with a clearance of 0.5-0.7mm between them.
17. ADJUST THE HEIGHT OF FEED DOG (Fig.17, 18)
I) Turn the balance wheel until feed dog is lifted to its highest position from throat plate surface.
2) Loosen
screw (A) of feed lifting rock shaft crank right (See Fig.l7, b)
3) Move feed bar (B) in the direction shown by the arrow in Fig.l9 (a) to adjust the height of the feed
dog.
The standard height of feed dog is that the top of feed dog is 0.8mm above throat plate surface (B). (See
Fig. IS)
4) After the adjustment, be sure to tighten screw (A).
17
A b
18
: ZZI~ZZZ~~mm
a
18, ADJUST THE POSITION OF FEED DOG (Fig.19, 20)
A
b
19
The standard position of feed dog is that the clearance between the front end of the throat plate slot and the
first tooth
of the fully advanced feed dog is 0.8 mm, as shown in Fig.l9.
I) Fully advance the feed dog toward the front end of the throat plate slot.
2) Loosen feed rock shaft
crank screw (A). See Fig.20 (b).
3)
Move feed bar (B) in the direction shown by the arrow in Fig. 20 (a) to adjust the feed dog position.
4)
After the adjustment, be sure to tighten Screw (A).
-7-
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19. TIME FEED MOTION TO NEEDLE MOTION (Fig.21, 22)
The standard timing offeed motion to needle motion is that the top of feed dog (C) is flush with throat plate
surface (B) when the point
of needle (A) reaches throat plate surface (B). (Fig.21.)
If feed motion is not timed to needle motion, adjust as follows (Fig.21 and Fig.22).
1) Remove ann side cover (F).
2) Loosen set screws (A) and (D)
of feed and feed lifting eccentric.
3) Hold feed and feed lifting eccentric (B) and turn balance wheel
(E) slowly until the upper edge of arm
shaft oil hole (C) aligns with the lower
edge of reference
hole (G)
of feed and feed lifting eccentric.
4) Leave a clearance
of 0.3-0.Smm between feed and
feed lifting eccentric (B) and eccentric sleeve (H), then
tighten set screws (A) and (D).
22
H c
D
20. LUBRICATION ADJUSTMENT (Fig.23)
Adjusting the lubrication of rotating hook.
Oil adjusting screw (A) can adjust the lubrication of
the rotating hook as follows:
I) Turn oil adjusting screw (A) clockwise to
increase oil and turn oil adjusting screw (A)
counter-clockwise to decrease oil.
2) Oil adjusting screw (A) adjusts oil amount within
5 turns. When oil adjusting screw
(A) is fully tightened,
oil amount is maximum.
3) Readjustment depends on temperature, sewing
21
B A H c
D
A
23
speed and the like. In practice, oil amount can be judged as follows: remove the throat plate and place a piece of
paper on instead, run the machine for about 20 seconds, then check the oil splashed on the paper.
-8-
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21. REGULAR CLEANING (Fig.24)
I) Cleaning feed dog
Remove the throat plate and clear off the dust and
lint between feed
dog tooth slots.
2) Cleaning rotating hook
Swing out the machine head and clean the hook.
Wipe the bobbin case with soft cloth.
3) Cleaning oil pump, screen
Swing
out the machine head and clear off the dust
and dirt
on oil pump screen.
SPECIAL INSTRUCTION OF GC2008-MD
22.ADJUSTMENT OF NEEDLE BAR
STOP POSITION (Fig. 25, 26)
1) Adjusting of "Up" position
When the pedal is kicked down by heel, the machine
stops at '"UP" position.
If the marks deviate larger than 3
mm adjust as follows:
(I) Disconnect the plug (12 pins) of cable from the
machine head.
(2) Run the machine
and stop at "UP" position.
(3) While holding the balance wheel insert the
·'adjusting tool" in the hole A, then remove the
tool.
2) Adjusting of "DOWN" position
Set the machine stops at "DOWN'' position. When
the pedal
is kicked down by hell, the machine stops as
'"DOWN'' position. If the marks deviate larger than 3 mm
adjust as follows:
(
1) Disconnect the plug ( 12 pins) of cable from the
machine head.
(2) Run the machine and stop at
'"DOWN" position.
(3) While holding the balance wheel insert the
-9-
Feed dog
A
25
B
26
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'"adjusting tool'' in the hole B, then remove the tool.
3) Confirm the stop operation then the plug (12 pins) coming from the machine head into
the receptacle.
23. REVERSE SEWING (Fig.27)
While sewing, depressing the button switch, it becomes reverse sewing.
24. THREAD WIPER (Fig.28)
When the thread wiper is operated, the end of upper thread does not remain on the surface of fabric.
27
~~::=::.
Lower
thread
----
25. ADJUSTMENT OF KNIFE ENGAGEMENT(Fig.29,30,31,32)
1) Position of fixed knife
( 1) As a standard, the dimension between the fixed
knife's
end and the needle center is 2.5mm. (Fig.29)
( 2) The standard relation of the knife (left) and
tiwd knife is shown in the figure. As a standard,
Dimension A
is 0.3mm. (Fig.30)
(3)
When Dimension A is too large, the three piece
of threads will be cut, and can cause the needle thread to
come out from needle after trimming. If too small, the
thread
may not be trimmed correctly.
(
4) Adjust by adjusting the installation of the fixed
knife.
2) Knife engagement amount
( 1) When the sewing machine is rotated while the
solenoid
is activated, the knife (left) will be rotated by
the thread trimming cam. As a standard, the knife
-10-
Drive arm
(Blade section)
Fixed knife
Dimension A
--t+t+-- 0.3mm(standard)
Knife(left)
0
0
28
29
30
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engagement amount should be 1.5 to 2.0mm when the knife (left) moves the most. (Fig.3 I)
(2) Adjust by adjusting the installation of the drive arm.
3) Adjustment of knife engagement pressure
(I) As a standard, the knife (left) and fixed knife should start contacting at the position shown in the figure.
(Fig.32)
(2)
To adjust the engagement pressure, loosen the lock nut @ and then adjust the adjustment screw
31 32
1.5 to 2.0mm Knife (left)
Fixed knife
/
Knife(left)
- 11-
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A.ARM BED AND ITS ACCESSORIES
(2) (2) 5 6 7 8 9 10
11 12 13 (6) 14
-12-
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A.ARM BED AND ITS ACCESSORIES
Fig. Part No.
Description
M
No. D M
Remarks
AOI Hi\30082160 Screw 3 3
SMII/64(40)/10
i\02 11/\30780674 Rubber plug
<:P 11.8
4 4
A03 111322608081 Face plate I I
/\04 116722138001
Casket for face plate I I
/\05 Hi\30082090 Rubber plug
<:P 8.8 I I
A06 I!i\30780673 Rubber plug cv 19 2 2
/\07 HAI0082110 Set screw I I
A08 Hi\ 700132060 Screw I
i\09 HA 700132050 ThreJd guide (arm top) I
A I0
HC1611 B800 I
Arm side cover I I
All
IIA300B2170 Screw II II
AI2 HG61288001 Gasket
for arm side co1 er I I
i\13 HI210B0671 Oil check windm1 I I
i\ 14
Hi\300821 I0 Rubber plug <:P 5.7 I I
Al5 HB2251!081 Thread take-up cover l I
i\16 HA300C2030 Scre11 l I
Stv11116-1(40l 8
Al7 IIA I0082140 Thread guide I I
Al8 IIAI0680676 Scre11 9/64(40)x6 I I SM9;64(-10) 6
i\19 Hi\30082080 Set screw I5/64(28)x6 I I
SMIS/64(28)·6
A20 Hi\30082090 Rubber plug
<:P 8.8 I I
i\21 Hi\30082
130 Screw 2 2 Sl\11 16-1(40) 5.5
i\22 H/\30082140 Plate for guide I I
i\23 Hi\30780674 Rubber plug
<:P 11.8 I I
A24 116762B8001 Screw 9/64(40)x4.5 2 2
Siv19. 6-1( 40)
4.5
A25 1!675688001 Thread cutter I I
A26 11732288001 Screw I I
1\14 x6
/\27 H7325D7101 Bobbin winder complete I I
A28 HA30082100 Rubber plug <:P 27
I I
A20
HA I00132220 Leg 3 3
A30 H/\71080671 Nut I Sl\111/6-1(-llll
A31 HA71080672 Pre-tension spring I
A32
HAII280693 Thread tension discs 2
A33
HA710B0673 Thread tension stud I
i\34 HA71080674 Thread guide !
i\35 HA310B0701 Thumb nut I I
i\36 IIAII5B7010 Thumb net revolution stopper I I I
i\37 HAl! 580703 Thread tension spring
l l
i\38
IIA31 080702 Thread tension releasing discs I I
A39 I
!A3 I080705 Thread tension discs 2 2
i\40
f-1672588001 Thread tension releasing pin I I
i\41 HAII580701 Thread tension stud I I
A42 IIA 115B0706 Thread take-up spring I I
A43 HA31080703 Thread tension regulator bushing I I
-13-
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A.ARM BED AND ITS ACCESSORIES
Fig. Description M M Remarks
No.
Part No.
D
A-14 I-lA 11580708 Screw I I SM9/64(40)x4
:qs
1-li\1151'37011
0-ring I I
:\-16 IIA 70082100 Needle plate I I
!\-17 HAI2480713
Scre\v 2 2 SM3/32(56)x24
A-IS HA32480711 Spring for slide plate I I
:\-19 Hi\12480711 Slide Plate I I
:\50 IIA30082190 Scrc\v 2 2 SMII/64(40)x8
:\51 H005008060 Spring washer 3 3
.:\52 IIAI0680675 Thread guide I I
.\53 IIAI0680676 Screw I I SM9/64(40)x6
A
56
HAI0082100 Three-hole thread guide I
o\57 HAII280691 Screw type tension stud I
.·\5R IIA 11280692 Spring for pre-tension I
\59 HAII280693 Disk for pre-tension 2
AAO HAII280694 Space for pre-tension I
\AI
IIi\ 11280695 Pre-tension thread guide I
:\62 1-1007013030 Stop ring I
-14-
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