Highlead GC20698 User Manual
Purchasing
HIGHLEAD
GC20698 Series
Dept
Copy
•
Long
Material Lockstitch Sewing Machine
Arm
Version,Compound-feed,Heavy
Instruction
Parts
Catalog
Manual
SHANGHAI HUIGONG
N0.3
SEWING MACHINE FACTORY
CONTENTS
PRECAUTIONS
PREPARATION
l. Power cable connection --------
2.
Connection
3.
Adjustment
CAUTIONS
I. Oiling (
2.
Oiling (2)
3.
Oiling condition ---------------·
4.
Adjustment
5.
Cautions on operation ----------·
BEFORE
FOR
of
control
of
needle
ON
USE
l)
------------
-----------------·--------------------------------------------------4
of
oiling to rotating hook -----------------------------------------------------------5
STARTING
OPERATION
box
----------------------------------------------------------------------3
bar
stop position ---------------------------------------------------------3
OPERATION
1.
Installation
2.
Winding
3. Selection
4.
Threading
5.
Adjustment offeed (stitch) length and stitch reversing (touch-back) -
6.
Setting
7.
Threading
8.
Tension adjustment
9. Balance
10.
Needle thread tension ------------
l l. Adjustment
12.
Timing between rotating hook motion
13.
Adjustment
of
needles---
of
bobbin thread
of
thread ---------------------------
of
needle threads ---------------------------------------------
of
bobbin -------------------------------------------------------------------------------7
of
bobbin threads
of
thread tension ----------------
of
presser foot pressure
of
feed dog height
----------------------------
of
bobbin threads ----------------------------------------------------------9
OPERATION
·---
----
------------------------------------------------------4
---------
----------------------------------------------------------------5
---------------------------
----
---
----------------
------------------------------------and
_________________________
- -------------------------------------4
--
·--------
---------------
needle
motion
-------------------------------------- l
--------------------------------2
---------------------------------------------5
--
------
--
-
--------------6
-----------------------------------6
-----------------------6
--------------------
------------------------------------
---------------
--------------
--------------------------------------9
\_
_____________________________________
---
----------------
--
--------------9
----------------9
-------7
-----8
---
--9
10
14.
Relationship between rotating hook
15.
Relationship between hook motion and opener
16.
Relationship between needle motion
17.
Safety clutch device --------------------------------------------------------------------------
18.
Upper
feed
adjustment (needle side)'-----------------------
19.
Outside presser foot and inside presser vertical stroke adjustment -
20.
Adjustment
21.
Installation
22.
Adjustment
23. Adjustment
24
. Adjustment
25.
Sharpening
26.
Adjustment for change
SPECIFICATIONS
of
forward/backward stitch
of
movable knife ------
of
thread trimmer
of
needle threads tension release assembly -
of
scissoring pressure
of
fixed knife----------
of
needle
-----------------------------------------
motion
cam
--------------
of
------------------------------------------------
to
needle distance---
and take-up lever motion
motion
and
feed
dog motion ------------------------------------
length ---
---
---------
movable
----
------
---
---------------- ----
knife and fixed knife
---
·-
----
---
--------·-
---------
--
------
--
----
------
----
----------·- - - - ---
-------------
--
--
------------------------14
---
---------
---
--
----
--
----
--
- --
----------
--
--------------
---
---
-------
----------
---
---------
---------
--
·----
---
--------17
--
----
------
---
---
-----
---
--
11
11
11
12
13
14
14
15
16
16
17
18
PARTS
CATALOG
I . Ann bed its accessories
2.
Thread tension regulator mechanism
3.
Ann shaft mechanism
4.
Upper shaft & presser foot mechanism --;-
5.
Needle bar & thread take-up lever mechanism
6.
Stitch regulator mechanism
7.
Lower shaft & feed rock shaft mechanism
8.
Hook saddle mechanism
9.
Knife mechanism ( I ) -------------------------------------------
10.
Knife mechanism
11
. Touch back mechanism & detector mechanism
12.
Accessories
GAUGE
PARTS
-----------
LIAT
---------------------------------------------
-----------------------------------------------------------
---
------------------------------------------------,---------------------
(II)
--------------------------------
--
----------------------------
---------------------
------------------------------------------------
------------------------------------------------
---
-------------------------------------------
-------------------------------------------------
----
---
---------------------------
------------------
----
---
-------------
------------
--
---------------------------
---
----
19
21
24
26
29
--
32
34
37
39
41
44
46
48
PRECAUTIONS BEFORE STARTING OPERATION
1.
Safety precautions
I) 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 be turned
3) The power must be turned
adjusting the machine,
4) Avoid placing fingers, hairs, bars etc. near the pulley,
when the machine
5) Do not insert fingers into the thread take-up cover, under/round the needle, or pulley when the
is
in
machine
If
a belt cover, finger guard, and/or eye guard are installed,
6)
these safety devices :
2.
Precaution before Starting Operation
I)
If
the machine's oil pan has an oil sump, never operate the machine before filling
2)
If the machine
3) When a new sewing machine
the power on. (the pulley should rotate counterclockwise when viewed from the pulley.)
4)
Verify the voltage and (single or three) phase with those given on the motor nameplate.
operation.
is
off
when the machine
off
before tilting the machine head, installing
or
when replacing.
is
operation. Injury could result.
lubricated by a drop oiler, never operate the machine before lubricating.
is
first turned on, verify the rotational direction
is
not used,
or
when the operator leaves his/her seat.
or
removing the
"V"
belt, bobbin winder pulley, or motor
do
not operate the machine without
it.
of
the pulley with
"V"
belt,
3. Precaution for Operating Conditions
I) Avoid using the machine at abnormally high temperature (35°C
Cor
lower). Otherwise, machine failure may result.
°
in
2) Avoid using the machine
3) Avoid using the machine in areas where too much electrical noise, resulted from the
high-frequency welder and others,
dusty conditions.
is
generated.
or
higher)
or
low temperature (5
-1-
PREPARATION
FOR
OPERATION
~-----------------------------,
Operation
overall view
sewing machine
1 .. Power cable connection
1)
of
assembled
Connection to Power Supply
When connecting the
plugged in the proper receptacle after confirming the connector type and matching direction.
A.
In
case
of
the
"V
" phase
depends,
power
three-phase electrical power system, the
to
the white lead, and the "
how
eve
r,
upon the setting
Power
push
button
X-type servo
motor
Control
supply connector to the control box, the connector should be completely
"IJ"
phase should be connected to the red lead,
W"
phase to the black lead.
of
the internal switch in the control box as described
The
motor rotary direction
box
in
Paragraph 1-(3)
CAUTION:
the motor properly.
B. The appropriate power fuse capacity
The
green wire must be connected to the ground terminal
is
as follows. Power supply
2) Lamp Leads
A. When installing the illuminating lamp(6V, 15-20W),
the Control box.
removed and connected by
removing the insulating tube
from the wire and stripping
properly.
should be, then, insulated by
wrapping insulating tape on
the wires.
The
It
should be
wire connections
(
a)
Lamp
leads
in
order to ground
200V
-240V: I 0A
I00V-120V: 15/\
Thc
connecting wire is attached on the back
(b)
Bare
wire
Insulating
(2
to 3 turns
tape
wrapped)
lns~ating
tape
(2
to
3
turns
wrapped)
Lamp
leads
of
- 2 -
CAUTION: The power switch must be Turned
off
before connecting the lamp.
B. When the illuminating lamp
shown
control box will be possibly burned out.
in
CAUTION: The illuminating lamp must not be connected with any heater, such
3) Rotary direction
It
is
possible to change the rotary direction
bottom left side
switch. The built-in lamp in the internal switch
facing to the motor pulley, and on when rotating clockwise. The rotary direction has been set to
counterclockwise as facing to the motor pulley, matching with the machine prior to shipping
2. Connection
The control box should be connected
as shown to the right.
the figure
on
warmer and others,
It
may cause transformer winding burned out.
of
of
control box
is
not used, the end
right side.
the front cover on the control box; and push the internal direction selector
If
a short circuit occurs failing to insulate, the transformer in the
in
parallel. Otherwise, the load capacity will be exceeded.
Operation
of
the lamp leads must be insulated as (a)
of
the motor by removing the rubber cap
is
off
when the motor
box
Round
In
table
is
rotating counterclockwise as
hole
or
as
from
(b)
as
a foot
the
Note: (1) Be sure to turn the power swih
off
for safety before connecting
or disconnecting the connectors.
of
(2) The combination
the machine
heads with the motor control
panels are specified below.
Use special care for the correct
combination when replacing the machine head or motor control panel.
3. Adjustment
1) Adjust
When the pedal
machine stops at
deviate larger than 3 mm, adjust as follows.
a) Disconnect the plug (12 pins)
the machine head.
of
of
needle bar stop position
"UP"
position
is
kicked down by heel, the
"UP"
position . If the marks
of
cable from
b)
Run
the machine and stop at
c) While holding the pulley, insert the "adjusting
tool"
in
the hole" A", then remove the tool.
"UP"
position.
-3-
while mark "UP" positi
Black
mark
"DOWN" positi
on
on
2) Adjust
When
at
"Down" position. If the marks deviate
a)
Disconnect
the
machine
b)
Run
the
While
c)
tool"
of
"Down" position
the
pedal
is
"Neutral" the machine stops
the
plug (
12
pins)
of
cable
head
machine
holding
in
the hole "B", then remove the tool.
and
stop at "Down" position.
the
pulley, insert the "adjusting
large
from
than 5
mm,
adjust
as
follows.
3) Confirm the stop operation, then set the plug (
pings) coming
receptacle.
from
the machine
head
CAUTIONS ON USE
1.
Oiling (1)
Filling
the
oil
to
the
fount.
Oil
level
should
level
is
little,Please replenish
For oil, Use white spindle
2. Oiling (2)
When a new
for
considerably long time
arrow
in
the
be
periodically checked. I foil
oil
oill.
sewing machine
below figure
is
is
used
to
enough
used
for
again, replenish a suitable amount
----~
into
the
the
first
12
time,
or sewing machine left out
of
of
use
oil
to
the portions indicated
. I
by
- 4 -
------
3.
Oiling condition
See dripping
hole to check oiling condition during
operation.
4. Adjustment
Cautions on operation
5.
a) When the power
foot away from the pedal.
b)
It
should be noted that the brake may not
work when the power is interrupted
failure occurs during sewing machine operation.
c)
Since dust
of
oil through the oil sight
of
oiling to rotating hook
is
turned
in
the control box might cause
on
or
off, keep
or
--·--
ICl9W
Nul
power
malfunction
d) Do not apply a multimeter to the control circuit for checking; otherwise voltage
might damage semiconductor components in the circuit.
or
control troubles, be sure to keep the control box cover close during operation.
OPERATION
1. Installation
Note: Before installing the needles, be sure to turn
Double
lnutl
lhl
1crew
lh•
Needle
1111cl1
kNping
of
needles
upto
lhl
lhl
long
bollllm
grow
of
tide
nNclt
of
clamp
n1tdll
flee
and
ID
ti~
flee
~nlllfficieri
111Nr1lon
off
the power.
Needle
dillarled
0
Long
gro1111e
tide
X
of
multimeter
Sil'lle
Needle
I
!O
I
I
- 5 -
Long
groove
leftlide
2. Winding
Note: When bobbin thread
of
bobbin thread
Adjustment:
is
wound, keep the presser foot lifted.
3. Selection
It
is recommended
left needle (viewed from front), and
thread in the right needle. When discriminate
use
thread in both the needles.
For bobbin thread,
twist thread can be used.
4. Threading
a) Pass each needle thread through thread guide A
Note: When thin slippery thread (polyester Thread
b) With the take-up lever located at the upper most position,
pass each needle thread in the order shown
of
thread
to
use
"S"
twist thread in the
"Z'
twist
of
needle threads is impossible, use
"S"
twist thread
of
needle threads
filament thread, for example) is used pass the
thread through thread guide B
as
well as "
as
"Z"
well.
twist
Z"
in
the
or
following figure.
Note; Pressing the upper thread loosening button shown in the figure
opens the
saucer
of
the
upper
thread tension adjuster, and the upper thread can easil) pulled out.
- 6 -
below
uJI1, -
GC20698-
CiHIIII
1
5. Adjustment
Note:
To
make feed (stitch) length smaller, depress the feed reverse lever and set the feed length
setting dial to a desired position
Touch-back button
Stitching goes on in reversed direction while the button is held down, and returns
direction when the button is released.
GC20698-
of
feed (stitch) length and stitch reversing (touch back)
...
Direction
of
stitching can be reversed by depressing this button.
2
to
forward
f11d
lenvth
selling
dill
k
~
6. Setting
a) Pulling out 5.cm thread tail from the bobbin.
b) Hold the bobbin so that the bobbin thread is
of
bobbin
would in right direction and put it into the hook.
-
-----
---
- 7 -
7. Threading
a) Put the hook into the bobbin case
of
bobbin threads
and press
The
the bed .
b)While holding the
by left hand, rotate the hand-wheel
one turn by right hand.
By pulling up the needle threads,
as shown
will be lifted. Each combination
thread and needle thread should be aligned
down
the latch
thread end should be left on
two
in
the figure, the bobbin threads
CD
.
needle threads
of
bobbin
and led backward .
- 8 -
8. Tension adjustment
of
bobbin threads
9.
Balance
of
thread tension
Tension
adjusting
SOl"8W
10. Needle thread tension
• Needle thread tension should be adjusted in
reference to bobbin thread tension.
To
adjust needle thread tension, tum each tension
•
adjusting nut.
• Needle thread tension can be also adjusted for
special fabric and thread by changing intensity and
of
movable range
slack thread adjusting spring.
BX
2:::~
'~ht
C X /
,
Balance
bobbin
~:;..;?
~n
bobbin
tension
I I
1;?
neecle orloose
tension
neeae
or
tension
ogn1
11. Adjustment
Pressure to fabric(s) can be adjusted
of
presser foot pressure
by
turning the
pressure adjusting screw.
12. Timing between rotating hook motion and
needle motion
(I)
Set feed length (stitch length) to
setting dial.
(2) When needle is lifted 2.4mm from the lower dead
point, as shown
in
Figure, the following positional
relationship should be maintained.
of
The upper edge
needle eye should be2.3mm
below the hook point.
The hook point should be located at the center
of
needle axis.
Gap between the hook point and the side face
"6"
on the feed
of
------
Strang O Weak
--------9
~"i-:-
..
~ . ,i><.screw
- .
:._
.....:•.
Gap
betwean
haak
paint
and
upper
Needle
lift:
2.4nmfram
needle
lower
dead
paint
Center
af
needleuis
edge
----
Pressure
af
needle
adjusting
eye
needle should be 0.0.Smm.
-9-
• Positioning
(I)
When the needle
-Crossed helical gears on the right side and left side
should
"S"
and that
(2) Tighten each
set screw, on the hook shaft.
(3) Approximate position
should be found close to the needle when the needle
is at DOWN position.
To
finely adjust timing between the needle motion and
•
hook motion, loosen the set screw
wheel and move the gear wheel
within a range from I mm to 2mm.
of
be
engaged with the large wheel so that the
screw
of
of
the latter gear on the reverse side.
hook point
is
at DOWN position, the smaller
the fonner gear comes on the front side,
"S"
screw, where is punched for
of
hook
"C"
screw
of
hook
of
larger gear
in
its axial direction
-
l-2mm
j,@
N1.U.DOWN
poeition
-
1-2mm
13. Adjustment
Height
be adjusted for individual fabric(s) with the following
cautions:
• Fabric will be damaged
or pressure
• Even stitch length cannot be assured
too low or pressure
• Feed dog height should be measured at the point where
the needle is at the top position .
of
feed dog height
offeed
dog and pressure
if
of
presser foot is too large.
of
presser foot
of
presser foot should
the feed dog extends too high,
if
the feed dog
is
too small.
.
For light fabrics
For usual fabrics
For heavy fabrics
Adjustment procedure
a) Lean the machine head backward.
Approx. 0.8mm from throat plate
Approx. 1.0mm from throat plate
Approx. 1.2mm from throat plate
is
0.
8mm
Imm
b) Tum the hand wheel by hand and stop when the feed
dog rises to the maximum height.
c) Loosen the feed bar set screw.
d) Vertically move the feed bar (in the direction indicated
adequate height.
-
IO-
by
arrow
in
the figure) to adjust
it
to
e) After the adjustment, tighten the feed bar set screw.
• The feed ~og height is factory-adjusted to
14. Relationship between rotating hook
motion and take-up lever motion
When the timing belt (toothed belt) was removed for
its replacement, for example, the relationship between
rotating hook motion and take-up lever motion should
be adjusted as follows:
a) Tum the balance wheel and stop when the take-up
lever is lifted
b) Lean the machine head backward and make sure the
arrow (timing mark) put on the timing belt is in
line with the black line on the boss
c)
If
the timing mark is not in line with the black line ,remove the timing belt and install it again to
adjust.
to
its upper dead point.
of
15. Relationship between hook motion
and opener motion
t .2mm
lower shaft bearing.
App-ax.
0.2mm
Timing
belt
sprocket
a) Tum the balance wheel by hand and stop when
the opener holder is located most remotely from
the throat plate.
b) Make sure gap between the bobbin case holder A
and the opener
c)
If
the gap is too large
holder set screw
b) Lean the machine head backward.
c) Loosen the feed
and B.
d) Set the needle at the lowest position.
e) Adjust the distance between presser rod and vibration
prevention rod to 9mm and temporarily tighten the feed
is
approximately 0.2mm.
or
small , loosen the opener
Band
adjust position
Ii
fti
ng rock shaft crank set screws A
of
the opener.
A
Opener
Scl'IIW
Opener
hdder
lifting rock shaft crank set screws A and B
f)
Check that the right feed lifting rock shaft crank is
connected with the link at right angle, as shown in
Figure.
-
11
-
g)
If
the connection
cover, loosen screw C and move the right link to connect
the right feed lifting rock shaft with the link at right angle.
is
not at right angle, remove the back
h) After the completion
screws
A,
Band
• At this time make certain that needle can enter the
feed dog needle hole at the center
of
adjustment, fully tighten the
C.
of
the hole.
I
I
-,--l""T"-==---
I
Needle rod
Vibration
prevention
rod
Feed
shaft
lifting
crank
rock
(righl)
. I
17. Safety clutch device:
Safety clutch device
and cog belt from damage
caught into the hook when the machine
abnormally during operation.
(1) Function
a) When the safety clutch acts, the cog belt pulley will be
unloaded. then the rotation
The arm shaft only will rotate. Stop the operation
machine.
b) Clean the thread thoroughly which
c) Turn the cog belt hub by hand, and check whether the hook
Shaft rotates lightly and properly, place the clutch device as
follows.
of
safety clutch.
is
installed to prevent the hook
in
case the thread
of
hook shaft will stop.
is
caught into the hook.
is
loaded
is
of
-
12
-
(2)
How
to
set the safety clutch.
a) While pressing down the push button on the
opposite side
balance wheel slowly by right hand away
from you
b) The balance wheel will stop by the gear plate,
but
tum
c) Release the push button.
d) As shown in the Figure, the safety clutch device
is set.
(3)
Force applied
a) The force applied to the safety clutch
smallest when the white mark
pin faces the center
of
bed by left hand, tum the
as
shown
the balance wheel more finnly.
in
the figure.
to
the safety clutch.
of
the lower shaft. The
of
the eccentric
is
the
White
mark
Eccentric
·
strengthen
Pin
Sat
TmingBett
Screw
force proportionally increases as the white mark
faces the outside.
b) To adjust the force slide the timing belt, loosen
the set screw, and tum the eccentric pin.
After the adjustment, make sure to fasten the set screw.
c)
18.
Upper feed adjustment
(Needle side)
If
the uneven feeding occurs according to the fabric,
of
adjust the long hole
crank (right) to adjust the upper feed length.
(How to adjust)
a) Loosen the special bolt.
Move the special bolt upward to decrease upper feed.
b)
c) Move the special bolt downward to increase the upper feed.
theoretically becomes equal at the reference line on the_ horizontal feed shaft crank.
the horizontal feed sha
ft
Low
Shaft
Horizontal
The
upper feed and the lower feed
Eccentric
lhaft
c:rank,right
Pin
d) Securely tighten the special bolt after adjustment.
-
13
-
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