Highlead GC2268 User Manual

HIGH

GC2268

LEAD

CYLINDER-BED UNISON

Instruction

Parts Catalog

FEED

Manual

SEWING

MACHINE

SHANGHAI HUIGONG

N0.3

SEWING MACHINE FACTORY

PRECAUTIONS

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 pulley.

2)

Power must
Power must be turned off when tilting the machine head, installing or removing the ''V" belt, adjusting

3)
the machine, or when replacing.

4)

Avoid placing fingers, hairs, bars etc., near the pulley, "V" belt, bobbin winder pulley, or motor

be

BEFORE

turned off when the machine

STARTING OPERATION

is

not

in

use,

or

when the operator leaves the seat.

when

the machine

5)

Do

not insert fingers into the thread take-up cover, under/around the needle, or pulley

machine

2.

Precautions before

1)

Do

not operate the machine before lubricating

2)

When a new sewing machine
power on (the pulley should rotate counterclockwise when viewed from pulley) .

3)

Verify

3.

Precautions

1)

Avoid
or lower)

2)

Avoid

is

in

operation.

is

in

operation.

starting

the voltage and

for

operating

using the machine at abnormally high temperatures (

using the machine

operation

is

(s·ingle

or three) phase with those given on the machine nameplate.

conditions

in

dusty conditions.

first turned on, verify the rotational direction

CAUTIONS ON USE:

1.

LUBRICATION CFig.L Fig.2, Fig.3)

it.

35

"C

or higher) or

of

the

pulley

low

temperatures ( 5

when

with

the

the

"C

1)

Before

Prior to operation, apply adequate amount

to

the points marked with the arrows.

2)

Lubricating

Shift the slide plate, and apply two or three drops

of

oil

And

fore

with

the

3)

Lubricating

Prior

to

the

fail.

Starting

every day

of

five drops

arrow

to

operation, apply two or three drops

holes shown with the arrows

the

Sewing Machine

the

hook

and

hook

to

the hole shown with the arrow

oil

every day

B.

the

feed

bar

shaft

to

the felt shown

C,

D and E without

of

saddle

of

-1-

oil

A.

oil

2

3

2. ATTACHING

Turn

OFF

I)

Turn the

2) Loosen needle

3) Insert the needle into the needle
further.

4)

Securely tighten

THE

NEEDLE

the power to the motor.

handwheel

clamp

the

to

needle

CD

3.

ATTACHING/REMOVING

(Fig.3)

move

the needle bar up to its highest position.

screw(2). Hold needle so that its indented part A faces exactly to the right.

bar

clamp

until it will

screw (2).

go

no

-®

4

THE

BOBBIN CASE (Fig.5)

5

I) Raise lever

2) Fit the bobbin
tilt the lever.

(I)

of

the

hook, and remove the bobbin case

case

into

the

hook

driving shaft, and

together

with the bobbin in

4. WINDING A BOBBIN (Fig.6)

I) Route the thread in the

it

winding

2) Set bobbin

contact with

3) Adjust screw (2) to

round the bobbin several times.

presser

the

belt.

(I)

down

adjust

order

the

of

A, 8 and C before

to bring

amount

the

winder

of

thread to be

in

-2-

it.

6

would round the bobbin so that the bobbin

is

wound with

thread

about

80%

of

its capacity. Turn the
screw clockwise to increase the amount
If

4)

5) The moment the bobbin has been wound up, the bobbin presser is released, and the bobbin winder will

5,

PLACING A BOBBIN IN

2) Pass the thread in threading slit (1) in the bobbin case,

(Caution) As long as

6.

HREADING

thread is

bobbin.

stop automatically.

1)

Hold a bobbin so that the end
round the bobbin is directed to the right and put
the bobbin case.

route it under the tension spring and draw
notch.

in

direction A makes

wound

unevenly wound the bobbin, right or left

THE

the

bobbin

t,he

bobbin rotate in direction

THE

MACHINE HEAD (Fig.8)

is

BOBIN CASE (Fig.7)

of

correctly the

of

thread

is

evenly

the thread wound

it

into

it

out from

thread

B.

wound

so

that thread

round the bobbin.

is

evenly wound round the

Thread the machine as illustrated

of

(1)through(13).

G)@@®@

@

®

@

7. ADJUSTING

THE

TITCH

in

the figure

in

the order

8

LENGTH (Fig.9)

;p

7

AD-=

9

Turn stitch length dial (

is

aligned with the pin.

Reverse feed stitching

I) Push down feed lever (2)

1)

counter-clockwise to bring the desired value to the top

3

of

the dial so that the value

2) The machine performs reverse feed stitching as long as the lever

3) The moment you release the lever, the machine resumed the normal stitching mode.

8.

THREAD TENSION

1)

Adjusting the needle thread tension (Fig. I 0)

is

held depressed.

Turn tension nut
(toward B) to decrease

2) Adjusting the bobbin thread tension (Fig.
Turn tension screw (2) clockwise (toward C) to increase the bobbin thread tension, or counter
clockwise (toward D) to decrease

(I)

clockwise (toward A) to increase the needle thread tension, or counter clocking

it.

II)

it.

10

1 1

9. THREAD TAKE-UP SPRING (Fig.12)

1)

To

change the stroke

(I)

Loosen screw (2) in the stopper, and move stopper (3) to the right or left.

(2) Move the stopper to the right to increase the stroke

decrease

it.

of

thread

take-up spring (1)

®

'------------'-------'1

1)

To

change the tension

of

the

thread

take-up

spring

of

the thread take-up spring , or to the left to

I I

I I

II

L---1

_

____,__

Loosen nut (4) and screw (6).Turn spring shaft (5) counter clockwise to increase the tension

-4-

of

the

spring,

tension is provided.

10.

ADJUSTING

or

clockwise to decrease

THE

PRESSURE

it

. Fit a screwdriver

OF

THE PRESSER

in

the

FOOT

spring

(Fig.13)

shaft and turn

it

until the desired

I) Turn pressure spring

co\.)nter clockwise (toward B) to decrease

2) After the adjustment, securely tighten nut (2)

11.

ADJUSTING

I) Loosen not

Highest position---The stroke
Lowest position--- The stroke

2) Alternate vertical motions
The alternate vertical strokes

(1) Loosen screw (2)

(2) Bring the thread take-up lever to its highest position, and lower the presser bar lifting lever. Move

top feed crank (3) to left A to increase the stroke

THE

(1

), and change the position

regulator(!)

PRESSER FOOT

is

maximized. A

is

minimized. B o

of

the walking foot and presser foot (Fig.15)

of

the walking foot and presser foot

of

the

top

feed crank

clockwise (toward A) to increase the pressure

it.

of

the regulator

AND

THE WALKING

of

the cam rod boss accordingly.

..

of

the presser

FOOT

(Fig.l4)

foot,

or to the right B to increase

of

the presser foot, or

it.

14

12.

HEIGHT OF

Feed

dog(!)
from the surface
needs to be adjusted according the sewing conditions or after
the feed dog

I) Maximize the feed

2) Loosen screw (3)

3) Adjust the feed

is

the standard height , and temporarily fix
position.

THE

FEED DOG (Fig.16)

has been factory-adjusted to

of

throat plate (2). When the feed dog height

replaced, follow the procedure described below.

dog

height.

in

the feed dog.

dog

height comparatively higher than

jut

out I mm

it

at that

-5-

4) Now, adjust the height

dog.o

of

the feed

dog

appropriately, and securely tighten the screw (3)

in

the feed

13. NEEDLE-

I)

Set the feed regulating dial to

2) Turn the handwheel to bring the needle bar to
the lowest position
needle bar connection

3) Determine the height
standard height
when a distance
the top end

(6)

2.4mm from the lowest position

4) Determine the position

screw (3) in the
In

5)
shaft saddle to the right

TO-HOOK

of

the needle eyelet and blade point

of

the hook

the state described in 3), loosen screw (5) in the

RELATIONSHIP (Fig.17)

"3".

of

its stroke, and loosen

screw

(I).

of

the needle bar:

of

the needle bar

of

1.7mm is provided between

when

gear

the needles ascends

of

the hook: Loosen 1 7

cover

(2), remove gear cover (2) and loosen screws (4) in the large bevel gear.

or

left until a

is

of

its stroke.

The

obtained

cle~

:ance

hook

of

0 to 0.05

driving shaft saddle

mm

is provided between the blade point

and

move

0-0.0511T11

the

hook

driving

of

the hook and needle (7) .After the adjustment, securely tighten the screw.

Then,

6)

14. ADJUSTING

After replacing the hook, be sure to confirm the position
needle guard
illustrated

I)

2)

align the blade point

THE

NEEDLE

is

obtained when needle guard (2) lightly comes in contact with the side face

in

the figure.
To bend the needle guard inward, apply a screwdriver to the outside
To

bend the needle guard outward, apply a screwdriver to the needle guard.

If

not, adjust the position

of

0-0.

the

hook

GUARD

05mm

with the center

OF

of

of

the needle, and tighten screw (4) in the gear.

THE

HOOK

of

the needle guard.

the needle guard by

(Fig.18)

bending

of

The

standard position

it accordingly.

the needle guard.

of

needle

of
(I)

the

as

18

-6-

19

15. ADJUSTING

I)

Tum

the hand wheel in its
end position.
Tum

2)

bobbin case (2) in

throat plate ( 4 ).

THE

BOBBIN CASE OPENNING

nonnal

the

rotational direction to bring

direction

of

arrow

B until stopper

LEVER

bobbin

(3)

(Fig.19)

case

opening

comes in contact with the groove

lever (1) to its back

in

3) Loosen screw (5) in the bobbin case
of

THE

0.1 to 0.15

LONGITUDINAL POSITION

that a clearance

16. ADJUSTING

opening

mm

is

protruding section A

lever adjustment plate (6) in

(Fig.20)

I) Adjusting the relationship between the top feed rod and presser

(I)

Set the feed regulating dial to its

(2) Loosen

top feed rod and

(Caution) Take

2) Adjusting the relationship between the feed
the needle bar

(I)

Set the feed regulating dial to its minimum value.

(

2)

Loosen

crank.

(3)

Adjust the position

clamping

care

clamping

screw

(I)

the

presser

not

to allow any play

screw

(3) in the feed rock shaft

of

the feed

minimum

in the needle

bar

to 7.5 mm

in

dog

so that the

value

bar

frame rear arm, and adjust the clearance between the

needle

dog

and

bar

of

the bobbin case.

OF

THE

bar

frame (2)

the

direction

of

the arrow so

NEEDLE BAR FRAME

comes

to

the

center

of

needle
the feed

dog

(slightly closer to the operator).

the needle hole

17. SAFETY MECHANISM (Fig.21)

If

the thread

machine
the lower sprocket only
the sewing machine

actuates to idle the lower

is

in operation, the safety mechanism actuates to idle

How

I)

) Remove the thread

( 1

(2)Pressing push button (1), strongly turn the pulley

the direction opposite to its normal rotational
direction.

2) Safety load
Turn adjustment

is

to reset

caught

If

is

in the hook while the sewing

the thread

in operation, the safety mechanism

sprocket

screw

is

caught

only.

caught6

(2)

in

the hook

in

direction A (clockwise)

in

the hook while

in

20

in

21

-7-

18. REPLACING

1)

How to remove the timing belt

( 1 ) Loosen screw

the feed lever shaft arm.

(

2)

Remove hand wheel ®, and pull

(

3)

Draw feed lever shaft @ until a clearance enough to allow

(

4)

Remove the timing belt from the lower sprocket, draw it from the side

the hole

2)

How to install the timing belt.

(

1)

Installation

in

reverse order

( 2

)The

synchronization

and the lower shaft should be

guaranteed when assembling the
toothed belt.
pulley ,make the thread take-up lever
on the
the

arrow

® to the water level position, the

belt should be assembled
the picture shows.

THE

TIMING BELT (Fig.22)

CD

in the hand wheel, crews ®, in main shaft rear

in

the main shaft rear bushing.

is

carried

When

upper

on

the belt pulley

out

analogously

of

the

upper

rotating the belt

point and then adjust

bushing

just

follow

out

main shaft rear

shaft

bushing®.

timing

bushing

belt

(J)

window

®,

clamping screws

to come

off

and pull out it from

is

provided.

@in

22

19. INSTALLATION

1 ) When using the pedal, fix the presser foot lifter according fig.23

and fig.24.

2)

When using the knee lifter, fix the presser foot lifter according

fig.25.

OF

PRESSER

FOOT

LIFTER

SETTING

-8-