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
From the library of: Superior Sewing Machine & Supply LLC

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

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
From the library of: Superior Sewing Machine & Supply LLC

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
From the library of: Superior Sewing Machine & Supply LLC

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
From the library of: Superior Sewing Machine & Supply LLC