HIGHLEAD GC188-MC Manuale utente

HIGH

LEAD

Purchasing

Dept

Copy

GC188-MC/GC188-MC-D

High Speed Lockstitch Machine With Edge

Cutter

And

Automatic Thread

Trimmer

Instruction Manual

Parts

Catalog

SHANGHAI

HUIGONG

N0.3

SEWING

MACHINE

FACTORY

From the library of: Superior Sewing Machine & Supply LLC

CONTENTS

PRECAUTIONS

BEFORE

STARTING OPERATION

...............................................................

MAIN SPECIFICATIONS

.................................................................................................

INSTALLING THE BELT.

...............................................................................................

ADJUSTMENT OF

NEEDLE

BAR

STOP POSITION

...............................................................

LUBRICATION

.............................................................................................................

CONDITION OF OIL LUBRICATION

................................................................................

LUBRICATION

ADJUSTMENT

.......................................................................................

ADJUSTMENT OF OIL PUMP

..........................................................................................

REGULAR

CLEANING.....

.. ... .... ..

...

. .. .. .. .. .. .. .. .. .. .. ..

.. .. .. .. .. ..

....

.. . ..

....................

10.

WINDING

ADJUSTMENT

.............................................................................................

11.

REPLACE NEEDLES

...................................................................................................

12. THREADING

...............................................................................................................

13.

SET STITCH LENGTH AND REVERSE FEEDING

...............................................................

14.

ADJUSTING THE THREAD TENSION

..............................................................................

15.

UPPER THREAD TENSION

............................................................................................

LOWER THREAD TENSION

.........................................................................................

17.

ADJUSTMENT OF FEED

DOG

INCLINATION

.....................................................................

18.

ADJUSTMENT OF THREAD

TRIMMER

MECHANISM

.........................................................

19. INSTALLING OF

THE

NEDDLE PLATE

...........................................................................

20. CLOTH CUTTING

KNIFE

.............................................................................................

21. THROAT PLATE COVER.

..............................................................................................

22. OTHER REPLACEMENT PARTS

................................................................................

-1-

From the library of: Superior Sewing Machine & Supply LLC

PRECAUTIONS BEFORE STARTING OPERATION

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

turned

off

when the machine

not in use, or when the operator leaves the seat.

(3) Power must

turned

off

when tilting the machine head, installing

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

in operation.

(6)

a belt cover, finger guard, eye guard are installed, do not operate the machine without these safety

devices.

2) Precautions before Starting Operation:

(1)

the machine's oil

pan

has an oil sump, never operate the machine before filling

it.

(2)

the machine is lubricated by a drop oiler, never operate the machine before lubricating.

(3) When a new sewing machine

first turned on, verify the rotational direction

the balance wheel with

the power

on.

(The balance wheel should rotate counter-clockwise when viewed from the balance

wheel)

(

Verify the voltage and (single or three) phase with those. given on the machine nameplate.

3) Precautions for Operating Conditions:

(I)

Avoid using the machine at abnormally high temperature (35

or higher) or low temperature (5

lower)

(2) Avoid using the machine in dusty conditions.

2. MAIN SPECIFICATIONS

Item GCI88-MC-D

GCI88-MC

Material Light-Medium heavy

Max.sewing speed 4500 rpm

Stitch length 0-5mm

Needle

bar

stroke 31.8nnn

By hand

4nm1

Presser By knee

lOnm1

Needle

DBX

#9~#14

Lubrication Auto lubricated

Auto trinnner 0 -

Auto backtracking 0 -

Rotating hook Auto lubrication hook

(Thread trinnning) Auto lubrication hook

Motor Speed adj. Motor 370W clutch motor

-2-

From the library of: Superior Sewing Machine & Supply LLC

3. INSTALLING THE BELT

(Fig.l)

Use

a V-belt

for

sewing machine use, type M

adjust the belt tension, change the motor

height by turning the tension adjust nuts so that the

belt sinks about

mrn when depressed

hand at

the

center

the belt span.

the tension is too

low,

the

speed may not be consistent in the low or

medium range, or the needle may not stop in the

proper position.

the tension

too high, the motor

bearings will deteriorate more rapidly.

ADJUSTMENT OF NEEDLE

BAR STOP POSITION (Fig. 2, 3)

Adjusting

"Up"

position

When the pedal

kicked down

heel, the

machine stops at "UP" position.

the marks

deviate larger than 3 mm adjust

follows:

(

Disconnect the plug (

pins)

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

then

remove the

tool.

2) Adjusting

"DOWN" position

Set the machine stops at "DOWN" position.

When the pedal is kicked down

hell, the

machine stops

"DOWN" position.

the marks

deviate larger than 3

nrrn

adjust

follows:

(I)

Disconnect the plug (12 pins)

cable

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

then remove the

tool.

Timing mark arm

Adjusting tool

3rd mark

\ Rotating

\ \ direction

1st mark

1st mark "Up" position

3) Confirm the stop operation then the plug (12 pins) coming from the machine head into

the receptacle.

-3-

From the library of: Superior Sewing Machine & Supply LLC

LUBRICATION

(Fig.4)

Pour oil up

position A

the oil tank.

During operation, check the oil level periodically,

and

cases where the oil level is

below

position B

replenish the

oil

supply up to position

Use white spindle oil.

CONDITION

OIL

LUBRICATION

(Fig.S)

While operating the machine, check the

condition

oil lubrication

through

the oil check

window.

LUBRICATION

ADJUSTMENT

(Fig.6)

Adjusting the lubrication

rotating

hook

Oil adjusting screw (A) can adjust the

_]ubrication

the rotating hook as follows:

(1)

Tum

oil adjusting screw (A) clockwise to

increase oil

and

turn

oil adjusting screw (A)

counter-clockwise

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

temperature,

sewing speed and the like. In practice, oil amount

can be

judged

as follows:

remove

the throat plate and

place a piece

paper on instead,

run

the machine for

about 20 seconds, then check the oil splashed

the

paper.

ADJUSTMENT

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

-4-

A 6

From the library of: Superior Sewing Machine & Supply LLC

REGULAR CLEANING (Fig.8)

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 pmnp screen.

Feed dog

10. WINDINGADJUSTMENT (Fig.9)

I) The wound bobbin thread should

neat and tight,

not, adjust the winding tension

turning tension

stud nut (A)

ofbobbin

winder tension bracket.

Note: nylon or polyester thread should

wound with little tension; otherwise,

bobbin

(D) might break or

defonn

2) When the wound thread layer does not present a cylindrical shape as shown

Fig.9 (a), lo,osen set screw

(B)

bobbin winder tension

bracket

and slide bracket (C) leftward or rightward.

thread is wound

shown

Fig.9 (b), move the bracket rightward,

but

thread is

wound

shown in Fig.9 (c), move the bracket leftward.

After adequately positioning the bracket, tighten set

screw (B).

3) Do not overfill the bobbin. The

optimum

length

thread will fill about 80%

bobbin

capacity. This can

adjusted by adjusting screw (E)

bobbin

winder stop

latch.

11.

REPLACE NEEDLES (Fig.lO)

Turn the balance wheel

lift needle

bar

the upper

-5-

b c

Lo:cg

groove

From the library of: Superior Sewing Machine & Supply LLC

end

its stroke. Loosen needle clamp screw (A). While keeping the long groove

the needle leftward fully

insert the needle shank

to the bottom

the needle socket. Then tighten needle clamp screw (A).

Note:

Fig.

(b): insufficient insertion.

Fig (c):

\\'Tong

direction

long groove.

12.

THREADING

(Fig.ll)

thread the needle thread, raise needle

bar

to the upper end

its stroke, lead the thread from spool and

perform threading as

sho\\n

in Fig.3.

draw the bobbin thread, hold the end

the needle thread and turn the

balance wheel to lower the needle

bar

and then to lift it to its highest position. Pull the needle thread and the

bobbin thread

drawn

up.

Put the ends

needle thread and bobbin thread frontward under presser foot.

Pu~

-~~-----·~Reverse

lever

Stitch

len~~---;-

adj

ust

Jit:(

13.

SET STITCH LENGTH AND REVERSE FEEDING (Fig.12)

change the stitch length, rotate the stitch length adjusting dial while pressing the push lever.

Pressing the reverse lever to reverse stitching.

3) The button switch can be pressed

perform reverse stitching.

4) Normally, set the button switch as illustrated by the solid lines.

reverse stitching, press the button

switch.

14.

ADJUSTING THE THREAD TENSION (Fig.13)

0 X X 13

d:==?ii*?

Wei

I balanced

The

upper

thread

The

upper

thread

stitch

too

tight

or lower too loose or lower

thread

too

loose

thread

too

tight

-6-

From the library of: Superior Sewing Machine & Supply LLC

15. UPPER THREAD TENSION (Fig.14)

The upper thread can

adjusted based on the

lower thread tension.

Adjustment can

done

rotating the thread

tension

nut.

For special fabric sewing with special thread,

the desired tension can

obtained

adjusting the

strength and operating range

thread take-up spring.

16. LOWER THREAD TENSION (Fig.15)

The lower thread tension can

adjusted

rotating screw A

•

17. ADJUSTMENT OF FEED DOG INCLINATION (Fig.16)

The feed dog has been set to standard

(horizontally).

necessary, adjust the inclination

according

the material

sewn

follows:

Slightly loosen screw A located in the feed

rock shaft crank.

Using a screwdriver. While pressing the

groove located in the eccentric shaft

using

a screwdriver, rotate the eccentric shaft

clockwise (to lift the front end)

counter-clockwise (to lower the rear end).

When adjustment

completed, tighten screw

-7-

Position of

mark

the

eccentric

shaft

Horizontal

8)'

ffi\

Down

Eccentric shaft

ead tension nut

Feed dog

Standard

Front up

(MAX.)

Front

down

(MAX.)

From the library of: Superior Sewing Machine & Supply LLC

18.

ADJUSTMENT OF THREAD TRIMMER MECHANISM

Thread trimmer mechanism

shown Fig.l7

Operation stroke

the thread trimmer solenoid

(1) Standard operation stroke is 6.0

mm.

(2) This stroke can be adjusted

using nut

F1xed

blade

bracket

untt

Thread

gUide~~

F1xed

blade , '

Movable kn1fe (left)

Knife

dr~ving

Knife

dnvmg

cr<.mk

shaft

Tw1st

spr~ng

Collar

-----·-----·-----·-----

--,

Thread

tnmmer

solencud urut :

Fle.,ble

w~re

· Tw1st

spnng

' Stopper

Cam

follower

crank

I Cam

follower

Drive lever

Stopper

plate

crank(2}

2) Adjustment

knife engagement (Fig.l8)

(1) Position

movable knife (left) and fixed blade.

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

knife engagement. With the

solenoid activated,

tum

on the machine. This

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

the blade is 1.5-2.0 tmn.

(3) Adjustment

knife engaging pressure.

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 tllis way: Loosen lock nut

and adjust it

using adjusting screw A

-8-

Fixed blade

Movab

ife6.

5mm

:3.

3mm/

B A

(left)

\ V /

Knife

driving

crank

5-2.

Omm

Movable

knife

(left)

Movable

knife

(left)

3mm

Fixed blade

From the library of: Superior Sewing Machine & Supply LLC

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