Highlead GC188-MC, GC188-MC-D User Manual
®
Purchasing
Copy
Dept
HIGH
LEAD
GC188-MC/GC188-MC-D
High Speed Lockstitch Machine With Edge
Automatic Thread
Trimmer
Cutter
And
Instruction Manual
Parts
SHANGHAI
HUIGONG
N0.3
Catalog
SEWING
MACHINE
FACTORY
CONTENTS
1.
PRECAUTIONS
2.
MAIN SPECIFICATIONS
3.
INSTALLING THE BELT.
4.
ADJUSTMENT OF
5.
LUBRICATION
6.
CONDITION OF OIL LUBRICATION
7.
LUBRICATION
8.
ADJUSTMENT OF OIL PUMP
9.
REGULAR
10.
WINDING
11.
REPLACE NEEDLES
12. THREADING
13.
SET STITCH LENGTH AND REVERSE FEEDING
14.
ADJUSTING THE THREAD TENSION
15.
UPPER THREAD TENSION
16
LOWER THREAD TENSION
17.
ADJUSTMENT OF FEED
18.
ADJUSTMENT OF THREAD
19. INSTALLING
20. CLOTH CUTTING
21. THROAT PLATE COVER.
OTHER REPLACEMENT PARTS
22.
BEFORE
NEEDLE
.............................................................................................................
ADJUSTMENT
CLEANING.....
ADJUSTMENT
...............................................................................................................
OF
THE
STARTING OPERATION
.................................................................................................
...............................................................................................
BAR
STOP POSITION
................................................................................
.......................................................................................
..........................................................................................
.. . .. . . .. ..
.............................................................................................
...................................................................................................
............................................................................................
.........................................................................................
DOG
TRIMMER
NEDDLE PLATE
KNIFE
.............................................................................................
..............................................................................................
..
. . .
..............................................................................
INCLINATION
MECHANISM
................................................................................
...............................................................
...............................................................
..
. .. .. .. .. .. .. .. .. .. .. ..
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..
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....
.. . ..
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2
2
3
3
4
.4
4
4
5
5
5
6
6
6
7
7
7
8
9
9
9
10
-1-
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
(3) Power must
the machine, or when replacing.
be
be
turned
turned
off
when the machine
off
when tilting the machine head, installing
is
not in use, or when the operator leaves the seat.
or
removing the "V" belt, adjusting
(4) Avoid placing fingers, hairs, bars etc., near the 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
(6)
machine
If
devices.
is
in operation.
a belt cover, finger guard, eye guard are installed, do not operate the machine without these safety
"V"
belt, bobbin winder balance wheel,
2) Precautions before Starting Operation:
(1)
If
the machine's oil
(2)
If
the machine is lubricated by a drop oiler, never operate the machine before lubricating.
(3) When a new sewing machine
the power
wheel)
(
4)
Verify the voltage and (single or three) phase with those. given on the machine nameplate.
on.
pan
has an oil sump, never operate the machine before filling
is
first turned on, verify the rotational direction
(The balance wheel should rotate counter-clockwise when viewed from the balance
it.
of
the balance wheel with
3) Precautions for Operating Conditions:
(I)
Avoid using the machine at abnormally high temperature ( 3 5
lower)
(2) Avoid using the machine in dusty conditions.
'C
or higher) or low temperature ( 5
'C
or
2. MAIN SPECIFICATIONS
Item
Material Light-Medium heavy
Max.sewing speed
Stitch length 0-5mm
Needle
Presser
Auto backtracking 0
bar
stroke
By hand
By knee
Needle
Lubrication Auto lubricated
Auto trinnner 0
Rotating hook
Motor
GCI88-MC-D
Auto lubrication hook
(Thread trinnning)
Speed adj. Motor
DBX
-2-
GCI88-MC
4500 rpm
31.8nnn
4nm1
lOnm1
I
#9~#14
Auto lubrication hook
3 70W clutch motor
-
-
3. INSTALLING THE BELT
1)
Use
a V-belt
2)
To
adjust the belt tension, change the motor
height by turning the tension adjust nuts so that the
belt sinks about
the
center
of
the
speed may not be consistent in the low or
medium range, or the needle may not stop in the
proper position.
bearings will deteriorate more rapidly.
4.
ADJUSTMENT OF NEEDLE
for
sewing machine use, type M
15
mrn when depressed
the belt span.
If
the tension
If
the tension is too
is
too high, the motor
(Fig.l)
by
hand at
low,
BAR
1)
machine stops at
deviate larger than 3 mm adjust
2) Adjusting
When the pedal is kicked down
machine stops
deviate larger than 3
STOP POSITION (Fig. 2, 3)
Adjusting
When the pedal
1)
Disconnect the plug (
(
from the machine head.
(2)
Run the machine and stop at "UP"
position.
(3)
While holding the balance wheel insert
the
remove the
Set the machine stops at "DOWN" position.
(I)
Disconnect the plug (12 pins)
of
"Up"
"UP" position.
"adjusting tool" in the hole
of
as
"DOWN" position.
position
is
kicked down
as
tool.
If
follows:
12
pins)
by
"DOWN" position
by
If
nrrn
adjust
as
follows:
heel, the
the marks
of
cable
A,
then
hell, the
the marks
of
cable
Adjusting tool
3rd mark
\ Rotating
\ direction
\
1st mark
2
3
from the machine head.
(2)
Run the machine and stop at "DOWN"
position.
(3)
While holding the balance wheel insert
the
"adjusting tool" in the hole
B,
then remove the
tool.
Timing mark arm
3) Confirm the stop operation then the plug (12 pins) coming from the machine head into
the receptacle.
-3-
1st mark
"Up" position
5.
LUBRICATION
(Fig.4)
Pour oil up
During operation, check the oil level periodically,
and
in
cases where the oil level is
replenish the
Use white spindle oil.
6.
CONDITION
While operating the machine, check the
condition
window.
7.
LUBRICATION
to
position A
oil
supply up to position
OF
of
oil lubrication
of
the oil tank.
below
A.
OIL
LUBRICATION
through
position B
the oil check
ADJUSTMENT
(Fig.6)
Adjusting the lubrication
Oil adjusting screw (A) can adjust the
_]ubrication
increase oil
counter-clockwise
within 5 turns. When oil adjusting screw (A) is fully
tightened, oil amount is maximum.
sewing speed and the like. In practice, oil amount
can be
place a piece
about
paper.
of
the rotating hook as follows:
Tum
(1)
(2)
(3) Readjustment depends
judged
20 seconds, then check the oil splashed
oil adjusting screw (A) clockwise to
and
turn
to
decrease oil.
Oil adjusting screw (A) adjusts oil amount
as follows:
of
paper on instead,
of
rotating
oil adjusting screw (A)
remove
hook
on
temperature,
the throat plate and
run
the machine for
on
the
(Fig.S)
A
6
7
8.
ADJUSTMENT
OF
OIL
PUMP
(Fig.7)
The standard adjustment is as follows: The
adjusting plate keeps the bypass hole fully closed.
decrease splashing, open the bypass hole
appropriately
To
-4-
9.
REGULAR CLEANING (Fig.8)
1)
Cleaning feed dog
Remove the throat plate and clear
2) Cleaning rotating hook
Swing out the machine
3) Cleaning oil pump, screen
Swing out the machine head and clear
Feed dog
head
off
and clean the hook. Wipe the bobbin case with soft cloth.
the dust and lint between feed dog tooth slots.
off
the dust and dirt on oil pmnp screen.
10. WINDING ADJUSTMENT (Fig.9)
I) The wound bobbin thread should
stud nut (A)
Note: nylon or polyester thread should
defonn
2) When the wound thread layer does not present a cylindrical shape as shown
of
(B)
Fig. 9 (b), move the bracket rightward,
wound
screw (B).
thread will fill about 80%
adjusted by adjusting screw (E)
latch.
11.
REPLACE NEEDLES (Fig.lO)
ofbobbin
bobbin winder tension
as
shown in Fig.9 (c), move the bracket leftward.
After adequately positioning the bracket, tighten set
3) Do not overfill the bobbin. The
Turn the balance wheel
winder tension bracket.
bracket
of
bobbin
to
lift needle
be
neat and tight,
be
wound with little tension; otherwise,
and slide bracket (C) leftward or rightward.
but
if
thread is
optimum
capacity. This can
of
bobbin
bar
length
winder stop
to
the upper
if
not, adjust the winding tension
of
be
Lo:cg
groove
by
turning tension
bobbin
in
If
thread is wound
(D) might break or
Fig.9 (a), lo,osen set screw
A
b
as
shown
c
in
10
-5-
end
of
its stroke. Loosen needle clamp screw (A). While keeping the long groove
insert the needle shank
Note:
Fig.
(b): insufficient insertion.
Fig (c):
12.
THREADING
To
thread the needle thread, raise needle
perform threading as
balance wheel to lower the needle
bobbin thread
is
\\'Tong
drawn
up
to the bottom
direction
(Fig.ll)
sho\\n
in Fig.3.
up.
Put the ends
of
the needle leftward fully
of
the needle socket. Then tighten needle clamp screw (A).
of
long groove.
bar
to the upper end
To
draw the bobbin thread, hold the end
bar
and then to lift it to its highest position. Pull the needle thread and the
of
needle thread and bobbin thread frontward under presser foot.
of
its stroke, lead the thread from spool and
of
the needle thread and turn the
Pu~
12
-~~-----·~Reverse
Stitch
adj
13.
SET STITCH LENGTH AND REVERSE FEEDING (Fig.12)
len~~---;-
ust i ng
Jit:(
lever
I
l)
To
change the stitch length, rotate the stitch length adjusting dial while pressing the push lever.
2)
Pressing the reverse lever to reverse stitching.
3) The button switch can be pressed
4) Normally, set the button switch as illustrated by the solid lines.
switch.
14.
ADJUSTING THE THREAD TENSION (Fig.13)
to
perform reverse stitching.
0 X X 13
~
Wei
I balanced
stitch
d:==?ii*?
The
upper
too
thread
thread
tight
or lower too loose or lower
is
too
is
loose
~~
The
upper
thread
is
-6-
thread
too
tight
is
To
reverse stitching, press the button
15. UPPER THREAD TENSION (Fig.14)
1)
The upper thread can
lower thread tension.
2)
Adjustment can
tension
the desired tension can
strength and operating range
nut.
For special fabric sewing with special thread,
be
adjusted based on the
be
done
by
rotating the thread
be
obtained
of
thread take-up spring.
by
adjusting the
16. LOWER THREAD TENSION (Fig.15)
1)
The lower thread tension can
rotating screw A
be
adjusted
by
14
ead tension nut
•
17. ADJUSTMENT OF FEED DOG INCLINATION (Fig.16)
The feed dog has been set to standard
(horizontally).
according
to
1)
Slightly loosen screw A located in the feed
rock shaft crank.
2)
Using a screwdriver. While pressing the
groove located in the eccentric shaft
a screwdriver, rotate the eccentric shaft
clockwise (to lift the front end)
counter-clockwise (to lower the rear end).
3)
When adjustment
A
If
necessary, adjust the inclination
the material
to
be
sewn
as
follows:
is
completed, tighten screw
by
Position of
using
or
mark
eccentric
~-
8)'
ffi\
Eccentric shaft
on
the
shaft
Horizontal
Down
Up
~
~
~
Feed dog
Front
Standard
Front up
(MAX.)
down
(MAX.)
-7-
18.
ADJUSTMENT OF THREAD TRIMMER MECHANISM
1)
Thread trimmer mechanism
of
Operation stroke
the thread trimmer solenoid
(1) Standard operation stroke is
(2) This stroke can be adjusted
as
shown Fig.l7
6.0
mm.
by
using nut
A.
I
F1xed
blade
bracket
~
Thread
gUide~~
F1xed
blade ,
Movable kn1fe (left)
2) Adjustment
(1) Position
See the illustration. The standard distances from
the needle center are 6.5 nun and 3.3 mm from
the movable knife (left) and fixed blade
respectively.
(2) Adjustment
solenoid activated,
rotates the thread trimming cam which rotates the
movable knife (left). When the movable knife
(left) has moved to its farthest distance, the
standard engagement
(3) Adjustment
thread is poorly cut, particularly when it is thick,
slightly increase the engaging pressure. This
should solve the problem. The engaging pressure
can be adjusted in
and adjust it
untt
I
@
'
Knife
dr~ving
Knife
cr<.mk
of
knife engagement (Fig.l8)
of
movable knife (left) and fixed blade.
of
knife engagement. With the
of
knife engaging pressure.
dnvmg
shaft
Cam
follower
crank
(1
I
tum
on the machine. This
of
the blade is 1.5-2.0 tmn.
tllis way: Loosen lock nut
by
using adjusting screw A
Tw1st
Collar
Cam
crank(2}
spr~ng
'\
follower
If
a
B,
Drive lever
Movab
'
Stopper
I e
(left)
Movable
Movable
-----·-----·-----·-----
I
Thread
· Tw1st
'
Stopper
plate
kn
i fe6.
5mm
Knife
driving
1.
knife
knife
tnmmer
solencud urut :
\\
Fle.,ble
w~re
spnng
Fixed blade
:3.
3mm/
\ V /
5-2.
(left)
(left)
B A
crank
Omm
Fixed blade
3mm
--,
A
-8-
Fixed blade
19.
INSTALLING
To
attach the needle plate, bring the cloth-cutting knife
set screws alternately while lightly pressing the needle plate onto the cloth-cutting knife.
20.
CLOTH
1)
Operation
(1)
(2)
2)
Attaching the cloth cutting knife
(
(2) Loosen two knife set screws
3)
Changing the cutting width
(
(2) When the position
(3) For the standard machine, a 3.2
CUTTING
To
actuate the cloth-cutting knife, press
down knife setting plate
To
stop the cloth-cutting knife and reset the
machine to the normal lockstitching mode,
pull knob 2 in the direction
1)
Raise or lower the cloth-cutting knife so that
section A
positioned 0-0.5 mm below the top face
the needle plate when the knife
lowest position.
the cloth-cutting knife.
l)
The needle plate decides the cutting width.
When the needle plate
knife guiding shaft set screw l so that proper
parallelism
loosen set screw
with the knife blade. Then tighten set screw
OF
THE
KNIFE
of
the cloth cutting knife
of
the cloth-cutting knife
is
obtained and the sharpness
of
the knife
2,
and position the knife so that the blade
NEDDLE
(Fig.20, 21)
1.
of
the arrow.
1,
and replace
is
replaced, loosen
is
changed in accordance with the change
nm1
PLATE
is
of
is
in its
of
the knife blade
2.
wide needle plate
(Fig.l9)
to
its lowest position, and gradually tighten the two
is
increased
of
the needle plate comes in contact
is
installed at the time
A
as
shown in the figure.
of
the needle plate size,
of
delivery.
21.
THROAT
l) When the cloth-cutting knife
PLATE
COVER
is
not in use, fit the throat plate cover, which
-9-
is
provided
as
an accessory,
onto the throat plate, and press A portion from above.
2) The throat plate cover is now securely fixed, and the hole for the waste cloth
22
u
22. OTHER REPLACEMENT PARTS
is
closed.
The standard cutting width
Please choose as follow sheet.
Cutting width
3/32
II
MC
(2.4)
1/
(
5/32
(4.0)
3/16
(4.8)
1/
(
3/
(9.5)
3.
6.
.
MC-D
8
II
MC
2)
MC-D
II
MC
MC-D
II
MC
MC-D
4
II
MC
4)
MC-D
8
II
MC
MC-D
Needle Throat
plate
H5732B7101
H5716B7101
H5733B7101
H5724B7101 H5705B8001
H5725B7101
H5734B7101
of
the machine is 1/8" (3.2mm).
dog
Feed
H5707B8001
H5705B8001
H5705B8001
H5706B8001
H5708B8001
Presser
H5705G7101
H5705G7101
H5705G7101
H5705G7101
HA316H0070
HA316H0070
We
offer the other specs according
plate
chip guard
H5722B8001
H7510B8001
H5722B8001
H7510B8001
H5722B8001
H7510B800l
H5722B8001
H7510B8001
H5728B8001
H7511B8001
H5737B8001
H7512B8001
Chip Throat
guard cover
H5719B7
101
H5719B7
101
H5719B7
101
H5726B7
101
H5726B7
101
H5726B7
101
to
your need.
plate
H5719I7101
H5719I7JOJ
H5719I7101
H5719I7101
H5719I7101
H5722I71
01
-10-
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