Highlead GC0318-2A, GC0318-2H, GC0318-2B, GC0318-2AD User Manual
HIGH
LEAD
GC0318-2A/GC0318-2H/GC0318-2B/
GC0318-2AD
TOP
AND BOTTOM FEED
SEWING MACHINE
LOCKSTITCH
Instruction Manual
Parts Catalog
SHANGHAI HUIGONG
N0.3
SEWING MACHINE FACTORY
CONTENTS
l.Instruction
1.
MAIN SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
2.
INSTALL THE MOTOR · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · . 2
3.
CONNECT THE CLUTCH LEVER WITH THE PEDAL · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
4.
PREPARATION AND LUBRICATION
5.
REPLACE
6.
NEEDLE, THREAD AND MATERIAL TO BE SEWN · · · · · · · · · · · · · · · · · · · · · · · · · ·
7.
RUN-IN
8.
THREADING····································································
9.
WINDING ADJUSTMENT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · . · ·
10.
SET STITCH LENGTH AND REVERSE FEEDING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
11.
POSITION PRESSER BAR · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
12.
ADJUST THE PRESSURE OF PRESSER BOOT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
13.
ADJUST THREAD TENSION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
14.
ADJUST THREAD TAKE-UP SPRING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
15.
ADJUST THREAD GUIDE AND THREAD TENSION · · · · · · · · · · ·
16.
TIME NEEDLE
17.
REPLACE ROTATING HOOK · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
18.
ADJUST THE HEIGHT OF FEED DOG · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
19.
ADJUST THE POSITION OF FEED
Manual
.·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
NEEDLES············································
OPERATION······························································
TO
ROTAING
HOOK··
DOG·
............
.. ··
....
···
·· ..
........
······
.. · .. · .... · ..
..
· · · · · ·
·······
...
···
..
· · · · · ·
..
······
···
....
· ·
.................
...............
................
...............
..........
..
· · · · · ·
.. · .. · .......
.. · .... · ......
........
.......
....
.....
.......
.....
..
· ·
·.
·13
2
2
·3
3
4
·4
·5
6
7
7
·8
·8
9
·10
11
12
·12
20.
TIME FEED MOTION TO NEEDLE M.OTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·13
21.
ADJUST OPENING TIME OF THE TENSION DISCS
22.
LUBRICATION
23.
REGULAEANING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·16
24.
ADJUSTMENT OF THREAD TRIMMER MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
ADJUSTMENT·························································
....
· · · · ·
.. · .. · ..
· · ·
.... · .. · ............
14
·15
17
2.Parts Catalog
A.
ARM BED AND
B.
NEEDLE BAR AND TAKE-UP, ARM SHAFT AND VERTICAL SHAFT MECHANISM · · · · · · · · · · · ·
C.
STITCH REGULATOR MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
D.
FEEDING AND FEED LIFTING MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·28
E.
PRESSER FOOT MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · ·. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 30
F.
PRESSER LIFTING, FEEDING MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 32
G.
LUBRICATION MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·35
H.
THREAD TRIMMER MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 37
I. TOUCH BACK MECHANISM & DETECTOR MECHANISM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 40
J.
OIL RESERVOIR AND OTHER ACCESSORIES · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
ITS
ACCESSORIES······················································
·18
·21
·25
42
-I-
1. MAIN SPECIFICATIONS
Item
Max. sewing speed
Needle
Needle bar stroke
Lubrication Automatic Automatic Automatic Automatic
Stitch length (
Presser fool
lift
2.INSTALL
Align Motor Pulley Groove ( B ) and Balance Wheel Groove ( A ) by moving the motor leftward or
rightward.
Cspm)
Cmm)
mm)
by
hand Cmm) 6 6 6 6
by
knee Cmm)
THE
MOTOR
GC0318-2A GC0318-2H GC0318-2B
DPX
2000
t:l
18
17
35 35 35
0-10
13
t:l t:l
-22
2000
DPX5
0-4
13
14
DPX
( Fig.l )
5I
:=j_gft
2000
17
0-10
13
GC0318-2AD
2000
t:l t:l
DPX
25
17
35
0-8
13
18
-22
t:l
[[j
L-----C
x+-+
Fig. 1
3. CONNECT
1) The optimum tilt angle
2) Adjust Clutch Cover ( D ) so that Clutch-Lever ( C ) and Draw Bar ( B ) run in line.
3)
The balance wheel should rotate counter-clockwise when viewed from the outside
The direction
of
plug
4) Adjust the tension
turning Motor Vertical
The proper tension
of
the center
the motor.
1 0-20mm when the belt
THE
of
the motor pulley rotation can be reversed by reversing
of
the belt by finger.
CLUTCH
of
pedal
ofV-belt
of
(F)
Position Screw ( E
the V-belt
is
depressed at
LEVER
(A
) is approximately
by
).
is
a slack
WITH
15
de g.
THE
G
F
I
E
D
c
PEDAL ( Fig.2 )
(turning
of
Balance Wheel
over 180 deg
I
.)
the power
(G).
B
Fig.2
A
-2-
X
4-.
Adjustment
of
needle
bar
stop position(Fig3):
1 ) Adjustment
When the pedal
marks deviate more than 3mm, adjust as follows:
C
1)
Disconnect the plug (12 pins) from the control panel;
2)
Run the machine and stop in the "UP" position;
(
(
3)
While holding the pulley, insert the adjusting tool into the two holes marked "A", then rotate the pulley.
2)
Adjustment
When the pedal
marks deviate more than 3mm, adjust as follows:
(
1)
Disconnect the plug (12 pins) from the control panel;
2)
Run the machine and stop in the "DOWN" position;
(
(
3)
While holding the pulley, insert the adjusting tool into the two holes marked "B", then rotate the pulley.
3)
Confirm the stop operation then the plug (12 pins) coming from the machine head into the receptacle.
of
"UP" position
is
kicked down by heel to cut the thread, the machine stops
of
"DOWN" position
is
returned to the neutral position, the machine stops in the "DOWN" position.
in
the "UP" position.
If
If
the
the
Mark (Black)
3rd Mark
Fig.3
5.
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
is
Though every 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
collision, uneven resistance or abnormal noise.
operation.
confirmed by strict inspection and test before leaving the factory, the machine
If
these exist, adjustment must be made accordingly before run-in
Fig.4)
if
there
is
running obstruction, parts
-3-
3) Oiling
(
1)
Required amount
Line (
A)
on the oil reservoir: Max. oil level.
Line ( B ) on the oil reservoir: Min. oil level.
Tf
oil level goes down under line ( B ),
oil cannot be distributed to each part
thus causing the parts a seizure.
(2) Replenishing
Always use only
for high speed sewing. Be sure to replenish oil to A 8 C
Line ( A ) before starting operation.
(3) Replacing oil
To
replace oil, remove Screw ( C ) to drain oil. After completely draining
securely tighten Screw
6.
REPLACE NEEDLES (
of
oil.
of
the machine,
No.l8
special machine oil
(C),
then fill the reservoir with fresh oil.
Fig.5)
I
I
Fig.
4
off
oil, clean the oil reservoir and
Turn the balance wheel to lift needle
While keeping the long groove
socket. Then tighten Needle Clamp Screw
Note: Fig. ( b
Fig.
):
insufficient insertion.
(c):
\\-Tong
of
the needle leftward fully insert the needle shank up to the bottom
direction
Long groove
oflong
bar
to the upper end
A.
groove.
Fig.5
of
its stroke. Loosen Needle Clamp Screw
of
the needle
1.
7.
RUN-IN OPERATION
Run-in operation is required for a new sewing machine, or a sewing machine left out operation for
::.
considerable length
1)
Remove Red Rubber Plugs (
2) Lift Presser Foot ( B
3) Run the machine at a
Window
(C).
of
time.
).
low
(Fig.
A)
speed ( 2000-2500spm) to check oil distributing condition through Oil Check
6)
on the top
of
the arm and replenish sufficient amount
-4-·
of
oil.
4) Perform run-in operation at 2000-2500spm for 30rninutes. After a lapse
which the working speed is increased gradually and the machine runs sufficiently well, the high speed 5000spm
can
be
adopted according
to
the nature
of
the
work
of
one month
of
service during
Fig.6
8.
THREADING
To
thread the needle thread, raise needle
perform threading as shown in Fig. 7 .
balance wheel
bobbin thread is drawn
to
( Fig. 7 )
lower the needle
up.
Put the ends
bar
bar
to
the upper end
To
draw the bobbin thread, hold the end
and then to lift
of
needle thread and bobbin thread frontward under presser
it
to its highest position. Pull the needle thread and the
of
its stroke, lead the thread from spool and
of
the needle thread and turn the
foot.
Fig. 7
-5-
9.
WINDING ADJUSTMENT (
1)
The wound bobbin thread should be neat and tight,
(A)
of
Stud Nut
Note: nylon or polyester thread should be wound with little tension, otherwise, Bobbin ( D ) might break or
deform.
2)
When the wound thread layer does not present a cylindrical shape
Screw ( B )
shown in Fig.7
leftward.
After adequately positioning the bracket, tighten Set Screw ( B
3)
Do
not overfill the bobbin. The optimum length
adjusted by Adjusting Screw
bobbin winder tension bracket.
of
bobbin winder tension bracket and slide Bracket ( C ) leftward or rightward.
(b),
move the bracket rightward, but
(E)
of
bobbin winder stop latch.
Fig.8)
of
if
not, adjust the winding tension by turning Tension
as
if
thread is wound
thread will fill about 80%
as
shown in Fig.7
).
shown
in
Fig.7 (
(c),
of
bobbin capacity. This can be
a),
If
thread is wound
move the bracket
loosen Set
as
a
b
c
Fig.8
-6-.
d
10.
SET STITCH LENGTH AND REVERSE FEEDING (
1)
again
Stitch length can be set by turning Dial
2)
The
figures
3)
Reverse feeding starts when Reverse Feed Lever ( C )
if
Reverse Feed lever
on
Face
(B)
of
dial show stitch length intmn.
(C)
is
released .
.---------------------------------~
(A).
is
depressed, and the machine will feed forward
Fig.9
Fig.9)
ll.POSITION
1)
Loosen lock Nut ( E ) and Pressure Regulating Thumb Screw ( A ) .
2)
Remove rubber plug from Face Plate
3) Loosen Screw ( C ) and adjust the position
throat plate will the presser foot lifted
4)
Tighten Screw
5)
Tighten pressure Regulating Thumb Screw
PRESSER BAR ( Fig.lO)
(B).
of
Presser Bar ( D ) till the presser foot is 6 mm above the
to
its highest.
(C)
and put in the rubber plug.
(A)
and Lock Nut ( E
).
Fig.
10
-7-
12.
ADJUST
THE
PRESSURE
OF
PRESSER EOOT ( Fig.11 )
Pressure
First loosen Lock Nut (
Fig.1 0
in Fig.l 0 ( b ) to decrease the pressure. Then tighten Lock Nut
The
(a)
to
pressure
of
presser foot is to be adjust in accordance with thickness
A).
For heavy materials, turn the pressure regulating thumb screw as shown in
increase the pressure, while for light materials, turn the pressure regulating thumb screw
of
presser foot is recommended to be less
as
a
of
materials to be sewn.
(A).
long as normal feeding is ensured.
Fig.
11
b
as
shown
13.
ADJUST THREAD TENSION ( Fig.1Z,13)
In
principle, thread tension is
In
practice, thread tension is adjusted according to the stitches obtained. The needle thread tension should
be adjusted with reference to the bobbin thread tension. Tum Tension Spring Regulating Screw (
case clockwise for more tension, or turn the screw counter-clockwise for less tension.
It
is
common practice to test the bobbin test the bobbin thread tension as shown in Fig.l3 . Hold the end
the thread from delivery eye.
thread tension can be adjusted by setting ( 1 ) the take-up spring tension. ( 2 ) the thread take-up spring stroke
and ( 3 ) tension spring. All these adjustments will be described in the following.
to
be adjusted in accordance with materials, thread and other factors.
A)
of
bobbin
If
the bobbin case is falling slowly, the proper tension is obtained. The needle
r-------~--------------------~
of
Fig.
12
--8--
Fig.
13
14.
ADJUST THREAD TAKE-UP SPRING (
1)
Adjusting the thread take-up spring tension
Loosen
counter-clockwise to decrease the spring tension. After the adjustment, be sure to tighten
thread take-up spring tension should be about 30g.
( B ) counter-clockwise to decrease the tension
(B)
clockwise until Spring
Stud ( B ) halfway back ( cmmterclockwise ) After the adjustment. Tighten Set Screw
Set Screw ( A ), turn Tension Stud ( B ) clockwise to increase the spring tension, or turn the stud
To
Attain this. First loosen Set Screw
of
Thread Take-up Spring ( C ) to zero, then turn Tension Stud
(C)
comes to the notch
of
thread tension regulating bushing, and again turn Tension
Fig.l4,15)
(A),
(A).
Set Screw (
turn Tension Stud
A).
The
Fig.
14
2)
Adjusting the thread take-up spring stroke
Loosen
counter-clockwise to decrease the stroke. After the adjustment, tighten
Before leaving the factory, the thread take-up spring has properly been adjusted. Readjustment
only
in the case
Set Screw ( B ), turn Stud ( C ) clockwise to increase the stroke or turn Stud ( C )
of
special material or special thread .
.-----~------------------------------.
Set Screw
,-----------(
(B).
A
is
needed
Fig.
15
-9-
15.
ADJUST THREAD GUIDE AND THREAD TENSION ( Fig.16,17)
The position
materials and sewing conditions.
Thread guide position
Material weight Heavy
of
the thread guide affects stitch tightness and therefore must be adjusted according to sewing
1 2
Leftward
Center
Medimn Light
3
Rightward
a
b
c
Figl5 shows different stitch fonns. Normal stitch fonn should be
sho\\<n
in
Fig.l5 ( a
and thread break-age, the tension
thread must be adjusted accordingly.
l)
In
case needle thread tension is too strong or bobbin thread tension is too weak, as shown in Fig.l5 ( b ), tum
the thumb nut counterclockwise to decrease the needle thread tension, or tighten the tension spring regulating
screw of bobbin case
2)
In
case needle thread tension is too weak or bobbin thread tension is too strong,
the
thumb nut clockwise to increase the needle thread tension, or loosen the tension spring regulating screw
bobbin case
In
3)
above means.
to
case of the stitch forms
).
When abnormal stitches cause puckering
of
needle thread and bobbin
to
increase the bobbin thread tension ( See Fig.l6 )
decrease the bobbin thread tension.
as
shown in Fig.l5 ( d )
and
as
Fig.
16
as
shown in Fig.l5 ( c
( e
),
adjustments can be made with reference to the
),
d
e
tum
of
c
Fig.
17
-10-
16.
TIME
A.
Adjusting the needle position ( See
Turn
I)
2)
Remove rubber plug from Face Plate
3) Loosen Set Screw
4) Move Needle Bar
5)
After
Fig.
IS ) is
meanwhile align the Inner Surface
down
to
NEEDLE
balance wheel by hand to bring Needle Bar ( C )
(B)
(C)
the
adjustment, tighten Set Screw ( B ) and put in the rubber plug. The standard needle timing ( See
to
align Timing Mark ( B ) on the needle bar and the bottom
its
lowest position.
TO
of
needle
vertically
ROTAING
Fig.
IS
)
(A).
bar
adaptor.
to
adjust needle
(E)
of
the hook and the center
HOOK
to
the lowest position
timing.
( Fig.18,19,20,21 )
of
its stroke.
of
Needle Bar Bushing ( A ) and
of
Needle Eye
(D)
when the needle bar gets
Fig.
18
B.
Adjusting the hook point timing
Timing
hook point timing
is
lifted by 2.2nnn from the lower end
upper
When adjusting the hook point timing, also notice that the clearance between the bottom
and Hook
of
needle motion to rotating hook motion has a great effect on sewing performance. The standard
(See
end
of
needle eye
Point ( C ) should
Fig.20)
(E).
is
to align Hook Point
of
its stroke. Besides, Hook Point
be
approx.
0.
(D)
and Needle Centerline
05nnn ( See Fig.21 )
Fig.
19
(D)
should be l.0-1.5nnn above the
(C)
when Needle Bar
of
needle notch
(B)
Fig.20
-
11-
00
21
17.
REPLACE ROTATING
HOOK
( Fig.22)
1) Lift needle bar to the highest position
2) Remove throat plate, take down needle and bobbin case.
3) Loosen Screw ( C )
4) Loosen two Screws ( D )
5) Tum balance wheel to raise feed bar
away from feed bar.
6) Installing the hook can be done in reverse sequence. Note that Needle ( B ) and the convex surface
Hook Positioner
of
hook positioner and take down Hook Positioner
of
rotating hook
(A)
should align with a clearance of0.5-0.7mm between them.
of
its stroke.
(A
) .
to
its highest position, then take down the rotating hook by turning it
0.
5-0.
7mm
of
Fig.22
18.
ADJUST THE
1) Tum balance wheel until feed dog is lifted to its highest position from throat plate surface.
2)
Loosen Screw
3) Move Feed Bar ( B ) in the direction shown by the arrow in Fig.
dog.
The standard height
4) After the adjustment, be sure to tighten Screw
HEIGHT
(A)
offeed lifting rock shaft crank right
of
OF
FEED DOG ( Fig.23,24)
feed dog is that the top
(A).
(See
of
feed dog is
Fig.23,b)
23
lmm
( a )
to
adjust the height
above Throat Plate Surface ( B
of
the feed
).
Fig.23
-12-
Fig.24
19.
Adjustment of feed dog inclination (Fig.25,26):
If necessary, adjust the inclination according to the material to be sewn
Eccentric
I) Loosen the screw "A".
2) Rotate the eccentric shaft clockwise or cmmterclockwise with screw driver.
3) Tighten the screw
Position of mark on the
eccentric shaft
"A".
~-
shaft
Horizontal
Feed dog
~
Standard
as
follows:
Fig.
25
8)'
8).
20.
TIME FEED MOTION
The standard timing
Plate Surface
(B)
when the point
of
Up
Down
~
~
Front up
Front
(MAX.)
down
(MAX.)
Fig.26
TO
NEEDLE
feed motion to needle motion is that the top
of
Needle
(A)
reaches Throat Plate Surface
MOTION
( Fig.27,28,29)
of
feed Dog ( C ) is flush with Throat
(B).
See Fig.27.
Fig.27 Fig.28
-13-
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