Highlead GC20818-MD User Manual
HI
Customer
Copy
®
Service
Basting Machine
In struction
a
t Cata
al
SHANGHAI HUIGONG
N0.3
SEWING MACH INE FACTORY
•
CAUTIONS
1,
Cautions on operation
I)
When the power
to
the UP position when the power switch is turned
2)
Note that braking does not work
operation.
3)
Since dust or other foreign matter entering into the control box may cause malfunction or trouble, be
sure
to
keep control box cover closed during operation.
4)
Do
not use a multi meter to check the control circuit. Otherwise, semiconductors in the control circuit
might be damaged by voltage from the multimeter.
2.
Precautions before
I ) Never operate the machine before filling the machine's oil pan.
2)
When a new sewing machine is first turned on, verify the rotational direction
ON
USE
is
turned on and off, keep your foot away from the
on.
if
the power is turned off, or power failure takes place, during machine
starting
operation:
pedal
Note that the needle goes up
of
the pulley with the
power 0
3.
or lower) .
4.
The control box should be connected
care
11
.
~)
V'!ri
fy
the voltage and phase (single
Pfuautions for operating conditions:
1)
A\Olcl
us'ng the machine
2)
Avoid
using the machine in dusty conditions.
Connection
Note:
(2) The combination
for
the correct combination when replacing the machine head or motor control panel.
(I)
of
contro box
Be sure
to
turn the power switch
of
at
abnormally high temperatures (
as
shown
the machine heads with the motor control panels are specified below. Use special
or
three) with those given on the machine nameplate.
35
'C or higher) or low temperatures ( 5
to
the right.
off
for safety before connecting or disconnecting the connectors.
·c
INMe
mark
Black mark
S.Adjustment
I)
Adjust
of
needle
of"UP"
bar
stop position
position: When the pedal
is
kicked down by heel, the machine stops
-1-
UP
DOWN
pos1110n
position
at
"UP" position.
If
the marks deviate larger than 3 nnn, adjust
(
l)
Disconnect the plug (12 pins)
machine head.
(
2)
Run the machine and stop
(3)
While holding the pulley, insert the "adjusting ®
tool"
in
the hole "A", then remove the tool.
2)
Adjust
of
"Down" position: When the pedal is
at
as
follows.
of
cable from the
"UP"
position.
"Neutral" the machine stops at "Down" position.
deviate large than
(I
) Disconnect the plug (
(
2)
(
3)
3)
Confirm the stop operation, then set the plug (12 pings) coming from the machine head into the
receptacle.
•
CAUTIONS
5 nnn, adjust as follows .
12
pins)
Run the machine and stop
While holding the pulley, insert the "adjusting tool" in the hole "B", then remove the tool.
at
"Down" position.
ON USE:
If
the marks
of
cable from the machi
1 , Lubrication(! )(Fig.4)
Pour oil
During operation, check the oil level periodically, and in
cases where the oil level
supply
Use
up
to
position
up
to
position
white spindle oil.
"H"
"H"
of
the oil tank.
is
below position "L", replenish the oil
.
ne
3
head.
2.
Lubrication (2)(Fig.5)
When a new sewing machine
used again, replenish a suitable amount
is
used for the first time, or sewing machine left out
Note: Lubricate the Hook Base everyday.
0 1-2
e
3,
Adjustment
~
- 4
drops
drops
of
oiling to rotating
hook( Fig.6 )
of
oil
to
the portions indicated
-2-
by
arrow in the fig.
of
use· for a long time
is
OPERATION
1 , Attaching the needle( Fig. 7)
1 ) For needle, use '
2 ) Determine the needle gauge for thickness If thread used.
3 ) Loosen the needle clamp screw.
4 ) Hold the needle with the prime groove turned
put it into the needle socket until it stops.
5 ) Tighten the needle clamp screw.
2,
Winding the
"Mt
bobbin
X 190"
thread(Fig.8)
to
the front and
7
9
3,
Threading the machine(Fig.9)
The needle should
4,
Setting ofbobbin(Fig.lO)
1 ) Put the bobbin into the bobbin case in the direction that the bobbin
in the bobbin case rotates clockwise, viewed from the front, when the thread
is
pulled.
Pass
2 )
thread will be led out from aperture
*The bobbin should rotate in the direction shown by arrow in the
tigure when the thread
5,
Leading
I ) Put the bobbin and bobbin case together into the hook, as shown in
the right figure.
2)
the pedal by toe
Pick
out
up
be
threaded in the order numbered in the right figure.
the thread through slit
CD
of
bobbin case and pull. The
®.
is
pulled.
the
bobbin
the end
of
to
run the machine one turn. When the needle thread is
thread(Fig.
needle thread
11)
by
left hand and lightly press down
<D
up,
pulled
the bobbin thread will
be
drawn out
as
shown in the right figure.
-3-
6..
Thread
tension (Fig.12)
7" Bobbin
0 Balance tension
8
..
Needle thread tension
The needle thread tension can
the thread take-up spring.
1 ) Tension disk presstrre adjustment (Fig.
(1) In most cases, thread tension can by properly adjusted only by changing tightness
regulator thmnb nut.
(2)
thread
To
increase presstrre, ttrrn the nut clockwise.
tension
adjustment(
Tight needle or
loose bobbin
tension
adjustl!'~dt
be
adjusted
.Fig.13)
Loosen needle
or
tight bobb in
tension
by
changing presstrre
l4)
Loosen
Bobbin tension
adjusting screw
of
the tension disk, and force and stroke
'J)Tighten
of
the tension
13
of
(3)
To
decrease pressure, ttrrn the nut counter-clockwise.
2)
Thread take-up spring force/stroke adjustment
Apply a scre\vdriver to the thread take-up spring stud and ttrrn the stud. Spring force increases when the
screwdriver
face plate and loosen the screw
3 ) Thread take-up spring force/stroke adjustment ( Fig.
is
ttrrned counter-clockwise, and decreases when ttrrned clockwise.
of
tension regulator slightly.
(Fig
. 15)
15
If
the stud is tight, remove the
)
Loosen the stop screw, adjusting the stopper block , After the adjustmen
The standard stroke
9,
Adjustment
of
thread take-up spring
of
thread
tension regulator (Fig.
is
from 6mrn
to
8nm1
16)
-4-
t,
be sure
to
tighten the set screw.
1 ) Adjustment
of
thread tension regulator setting position. The
standard gap
contact with the tension release pin.
position
2 ) Tension release timing adjustment The tension release
should
needle plunges into the throat plate.
10,
Presser foot pressure
Loosen the pressure adjusting screw lock nut and turn the pressure
adjusting screw
Turn the screw counter -clockwise
Note: Do not change setting
clapping noise may
11
, Adjustment
l ) Height
'i'.>'!
is
about 0.5mm when the tension release cam salience is in
To
adjust, loosen screw A and change
of
the thread tension regulator properly.
be
set so that the tension release disks come to close at the time the
®.
Turn the screw clockwise
occur
of
of
presser foot
~
tandard
height
adjustment
to
decrease the pressure.
of
screw
during
operation.
presser foot height
of
the presser foot at its lowest position is 1.0
(picture
to
@.
If
(picture
17)
increase the pressure.
the
screw is too tight,
17)
cam
Loosen
screw®
.;-:.
Tighten
1010.---<ID
mm 1
r.
eas mxi
top
surface (sec the detail
To
to
secure the presser
2 ) Stroke
loosen screw
that the presser foot starts going up when the needle point reaches
0.5mm-l.Ommabove the presser foot bottom surface.(When this
adjustment
about 26.5nnn over the throat plate.)
12,
Timing
1 ) When the needle
hook and the needle should
•
tip.
•
surface is 0.05mm.
between the presser foot bottom surface and the throat plate
of
part "A").
adjust the height
of
is
made, the height
of
The
upper
The
clearance
of
the presser foot, loosen the set screw ® used
bar
guide bracket and vertically move the presser bar.
presser foot
CD
and adjust position
of
hook
and
needle(Fig.18)
is
at 2.2mm above its lowest position, the
be
located as described below.
edge
of
needle eye is 1.3mm below
between
the presser foot at stop
the
of
hook
presser
tip
and
bar
lifting bracket so
of
the
needle side
the machine is
the
hook
Center
needle
Throat
0.0511111
of
plate
2)
adjusted
The relative positions
as
described below.
of
the hook and the needle can
be
-5-
18
*The adjustment
is
easier when the presser foot and the throat plate are previously removed.
• Ad.iustment of hook tip position (Fig.19)
a,
Lean outward the machine head . Loosen three hook shaft gear
screws.
b,
Rotate the balance wheel by hand
2mm
2.
the needle.
clearance between the hook tip and the needle side surface is 0.05mm.
To
above the needle DOWN position.
c,
Rotate the hook by hand to align the hook tip with the center
d,
Adjust the lateral position
adjust, loosen screws
Note:
Use
care not to loosen set screw ® excessively, and not to disengage the hook shaft gear (small)
CD,
® and
of
®.
to
position the needle to
of
the hook saddle so that the
from the gear (large).
e,
Tighten the loosened screws
3) Lightly press the gear (large) against the side wall
in
the following order:
of
hook saddle and tighten set screw ® first.
19
Check the clearance between the needle and the hook and then tighten screw
4)
5)
Finally tighten screw
13, Timing between hook motion
When the toothed belt
between the hook motion and the take-up lever motion should be
as
adjusted
highest position.
(timing mark) on the toothed belt pulley meets the black line put on the
bearing bracket.
two marks are
follow:
1 ) Turn the balance wheel
2 ) Lean outward the machine head
3 )
If
the arrow mark
in
line, as shown in the right figure.
14, Timing between hook motion
l ) Rotate the balance wheel by hand to locate the opener holder to
®.
and
take-up lever motion(Fig.20)
is
removed for replacement, the timing
by
land to locate the take-up lever to its
to
make sure the arrow mark
~s
not in line with the black line, remove the toothed belt and install again so that the
and
opener motion(Fig.21)
CD
.
/ - ..GASr-11tT belt
Toothed
Arrow
mark
the
farthest position away from the throat plate.
CD
of
2 ) Make sure the clearance between the portion
and the opener is about 0.2mm as shown in the right figure.
3 ) If the clearance is too large or small, loosen opener screw
adjust position
of
the opener.
bobbin case
® and
-6-
• ADJUSTMENT
OF
THREAD TRIMMER
1 , Installation
l)
Initial position
a,
Rotate the balance wheel
needle
to
the DOWN position
b , While keeping the DOWN position,
press the cam follower crank to enter the roller
into the trimmer cam groove.
c , Rotate the balance wheel until the black
mark point on the arm meets the white mark
point on the balance wheel. In so doing, care should
(use) a screwdriver,
d , Loosen bolt
e , Adjust the movable knife so that its tip protrudes by 3-3.5mm from the fixed knife blade edge, as shown
btl
ow
.
Alter the adjustment, tighten bolt
of
movable knife (Fig.22)
of
movable knife
to
lower the
or
any other suitable tool).
CD
of
the rocker arm
CD.
Rocker
be
taken not to allow the
crank-
cam
roller to leave the cam groove
2) Ck anmcc between the movable trinnuer knife and the hook (Fig.23)
a , Rotate the balance wheel to lower the needle
b , While keeping the DOWN position, press the cam follower and
balance wheel by hand in the farthest position.
c , Rotate the hook by hand in the directions shown
and adjust the clearance between the movable knife and the hook to about
0.2nnn(loosen screws
2,
Adjustment
I) Rotate the balance wheel
2) While keeping the DOWN position,
press the cam follower crank to enter the roller
into the trinnner cam groove.
3) Adjust the trimmer
movable knife starts moving when the balance
wheel
is
turned
CD
and ®
of
trimmer cam (Fig.24)
by
hand and the green mark
to
adjust).
to
lower the needle
cam
so that the
to
the DOWN position
by
arrows in the right
to
the DOWN position
tum
the
0.2mm
point on the balance wheel meets the black point
on the
ann
To
adjust loosen two trimmer cam screws
A.
Cam groove
-7-
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