HIGHLEAD GC1088 Series User manual

111
Purchasing Dept
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® HIGHLEAD
GC1088 Series
Hig Speed Sing Needle Lockstitch
Industrial Sewing Machine
INSTRUCTION MANUAL

From the Library of Superior Sewing Machine & Supply LLC
BEFORE OPERATION
l. Never operate the machine unless its oil pan has been filled
with oil.
2. After setting up the machine,check the direction of motor
rotation. To check it, turn the handwheel by hand to bring
the needle down, and turn the power switch ON while observing
the handwheel. ( The handwheel should turn counterclockwise
as observed from the handwheel side.)
3. Do not use a larger motor pulley for the first one month.
4. Confirm that the voltage and phase ( single or 3-phase)
are correct by checking them against the ratings shown on
the motor nameplate.
OPERATION PRECAUTIONS
l. Keep your hands away from the needle when you turn the power
switch ON or while the machine is operating.
2. Do not put your fingers into the thread take-up cover while
the machine is operating.
3. Be sure to turn the power switch OFF before tilting the
machine head
or removing the V belt.
4. When an operator leaves from the machine,make sure to turn
off the power.
5. During operation, be careful not to allow your or any other
person' s head or hands to come close to the handwheel, V
belt, bobbin winder or motor. Also,do not place anything
close to them. Doing so maybe dangerous.
6. If your machine is provided with a belt cover, finger guard
or any other protectors, do not operate your machine with
any of them removed.
7. Don' t clean the face of machine head with thinner.
1

From the Library of Superior Sewing Machine & Supply LLC
1. INSTALLATION (Fig. l,Fig.2,Fig.3,Fig.4)
* Installing the oil pan
1) The oil pan should rest on the four corners of the machine
table groove.
2) Fix two rubber seats CD on side A ( operator' s side) using
nails® as illustrated above. Fix two cushion seats@ on
side B ( hinged side) using nails®· Then place oil pan
@ on the fixed seats. ( Fig. 1, Fig. 2 )
3) Fix hinge CD into the opening in the machine bed, and fit
the machine head to table rubber hinge ® before placing the
machine head on cushions @ on the four corners. ( Fig. 3 ,
Fig. 4 )
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CD
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Fig.I
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18.5mm
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Fig.2 ®
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2

From the Library of Superior Sewing Machine & Supply LLC
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Fig.3
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Fig.4
CD
3

From the Library of Superior Sewing Machine & Supply LLC
2.LUBRICATION ( Fig.5, Fig.6)
1. Information on lubrication ( Fig.5)
* Before staTting the machine
1) Fill Oil pan CD with sewing machine oil (10 white oil) up
to HIGH mark A.
2) When the oil level lowers below LOW mark B, refill the oil
pan with the specified oil.
3) When you operate the machine after lubrication, you will
see splashing oil through oil sight window @ if the
lubrication is adequate.
4) Note that the amount of the splashing oil is unrelated to
the amount of the lubricating oi 1.
* Precaution
When you first operate your machine after set up or
after an extended period of disuse, run your machine
at 3, 000 s. p. m. to 3, 500s. p. m. for about 10 minutes
for the purpose of break-in.
Fig.5 Fig.6
2. Adjusting the amount of oil supplied to the face
plate parts( Fig.6)
1) Adjust the amount of oil supplied to the thread take-up
and
needle bar crank@ by turning adjust pin CD.
4

From the Library of Superior Sewing Machine & Supply LLC
2) The minimum amount of oil is reached when marker dot A is
brought close to needle bar crank ® by turning the adjust
pin in direction B.
3) The maximum amount of oil is reached when marker dot A is
brought to the position just opposite from the needle bar
crank by turning the adjust pin in direction C.
3. ADJUSTING THE AMOUNT OF OIL SUPPLIED TO THE
HOOK ( Fig.7 ,Fig.8 ,Fig.9)
1) After cooling, the machine may be idling for three minutes
( operating continued properly ). ( Fig. 7 )
(2) The place of conrirmcd
Cf; The amount of oi I cnnfi rmed pnper
Hnok
Hushing
'Rr1s1"~ plat<:
The amount of Oil re:servoir
oil confirmed paper
Fig.7
2) The amount of oil confirmed paper must be inserted in the
state when the machine is operating.
3) Oil in the oil pan is confirmed within HI and LOW.
4) The amount of oil confirmed is for five seconds ( please
use the clock with the second).
* The proper amount of oil manual ( Fig.8)
1) The amount of oil can be adjusted according to the different
sewing process but it must be suitable amount.
*Otherwise the hook will generate heat or the sewing
material will be contaminated.
5

From the Library of Superior Sewing Machine & Supply LLC
2) Use the amount of confirmed paper for three times to observe
the amount of oil. Adjust the screw until the mark on the
paper hasn't changed.
fhe amounl of oil
1mm
Min
Fig.9
The amounl of oil
Max
Fig.8
* Adjusting the amount of oil supplied to the hook
( Fig.9)
1) More oil is supplied as oil amount adjust screw mounted
on
the hook driving shaft is turned toward+ in direction
A. As the oil amount adjust screw is turned toward - in
direction B, the amount of oil supplied will be decreased.
2) After adjusted, the machine must be idling for thirty
seconds. It can be confirmed the state of oil supplied.
6

From the Library of Superior Sewing Machine & Supply LLC
4.ATTACHING THE NEEDLE (Fig.IO)
* Turn the motor power OFF before starting to attach
the needle.
#
A needle of DBX 1 14 should be used. Select a proper needle
size according to the count of thread and the type of
material used.
1) Turn the handwheel until the needle bar reaches the highest
point of its stroke.
2) Loosen screw @, and hold needle CD with its indented part
A facing exactly to the right in direction B.
3) Insert the needle in the direction of the arrow until it
will go on further.
4) Securely tighten screw @.
5) Check that long groove C of the needle is facing exactly
to the left in direction D.
-@
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Fig.to
7

From the Library of Superior Sewing Machine & Supply LLC
5. SETTING THE BOBBIN INTO THE BOBBIN CASE
( Fig. 11 )
1) Hold the bobbin in a way that the thread open end is
directed to the left as observed from you, and set the
bobbin into the bobbin case.
2) Pass the thread through thread slit A, and pull the thread
in direction B. By so doing, the thread will pass under the
tension spring and come out from notch B.
3) Cheek that the bobbin rotates in the direction of the arrow
when thread C is pulled.
Fig.11
8

From the Library of Superior Sewing Machine & Supply LLC
6. THREADING THE MACHINE HEAD( Fig.12 )
Fig.12
7.ADJUSTING THE STITCH LENGTH ( Fig. 13)
1) Turn stitch length dial CD in the direction of the arrow,
and align the desired number to marker dot Aon the machine
arm.
2) The dial calibration is in millimeters.
3) When you want to decrease the stitch length, turn stitch
length dial CD while pressing feed lever @ in the
direction of the arrow.
9

From the Library of Superior Sewing Machine & Supply LLC
8.THREAD TENSION ( Fig. 14)
I.adjusting the needle thread tension
1) Adjust the needle thread tension using tension adjust nut
CD according to the sewing specifications.
2) As you turn nut CD clockwise ( in direction A), the needle
thread tension will increase.
3) As you turn nut CD counterclockwise (indirection B ),
the tension will decrease.
2.Adjusting the bobbin thread tension
1) As you turn tension adjust screw ® clockwise ( in
direction C ), the bobbin thread tension will increase.
2) As you turn screw ® counterclockwise ( in direction D),
The bobbin thread tension will decrease.
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Fig.14
10

From the Library of Superior Sewing Machine & Supply LLC
9.THREAD TAKE-UP SPRING ( Fig. 15)
1. Changing the stroke of thread take-up spring CD:
1) Loosen setscrew ®·
2) As you turn tension post @ clockwise ( in direction A ) ,
the stroke of the thread take-up spring will be increased.
3) As you turn the knob counterclockwise ( in direction B ) ,
the stroke will be decreased.
2. Changing the pressure of thread take-up spring CD:
1) Loosen setscrew ®, and take out tension asm. ®·
2) Loosen setscrew@, and remove tension post@.
3) As you turn tension post @ clockwise ( in direction A ),
the pressure will be increased.
4) As you turn the post counterclockwise ( in direction B),
the pressure will be decreased.
® @
CD
Fig.15
IO.HAND LIFTER (Fig. 16)
1) To stop the machine with its presserfoot up, turn hand
lifter CD in direction A.
2) The presser foot will go up about 5.5mm and stop.
3) The presser foot will go back to its original position when
hand lifter CD is turned down in direction B.
11

From the Library of Superior Sewing Machine & Supply LLC
4) Using the knee lifter , you can get the standard presser
foot lift of about 10mm and a maximum lift of about 13mm.
Fig.16
11.PRESSER FOOT PRESSURE ( Fig. 17)
1) Loosen nut @. As you turn presser spring regulator CD
clockwise (indirection A), the presser foot pressure will
be increased.
2) As you turn the presser spring regulator counterclockwise
( in direction B ), the presser foot pressure will be
decreased.
3) After adjustment, tighten nut @.
4) For general fabrics, the standard height of the presser
spring regulator is 29 to 32mm(5kg). (For the model
GC1088-H
it is 7kg.)
12
.. ---
-
Fig.17

From the Library of Superior Sewing Machine & Supply LLC
12.ADJUSTING THE FEED TIMING ( Fig.18)
1) Loosen two setscrews ® and ® on feed eccentric cam CD,
properly position the eccentric cam. Then retighten the
setscrews.
2) To obtain the standard feed timing,when the feed dog is
dropping from the throat plate , align the top of the feed
dog with the top of the hole on the needle and the top of
the throat plate.
3) To advance the feed timing in order to prevent uneven
material feed, move the feed eccentric cam in the direction
of the arrow.
4) To delay the feed timing in order to increase stitch
tightness,move the feed eccentric cam in the opposite
direction from the arrow.
* If moving the feed eccentric cam to far,the needle
will be break .
Standard
CD
Fig.18
13

From the Library of Superior Sewing Machine & Supply LLC
13.HEIGHT OF THE FEED DOG ( Fig. 19)
1) The feed dog is factory-adjusted so that it juts out from
the throat plate surface 0.8mm to 0.9mm.For the
GC1088-A, it juts out 0. 7mm to 0.8mm.For the
GC1088-H,0.95mm to 1.05mm.
2) If the feed dog juts out too much, puckering may result when
sewing light-weight materials . ( Recommended protrusion:
0. 7mm to 0.8mm)
3) To adjust the height of the feed dog:
(1) Loosen
screw® of crank CD.
(2) Move the feed bar up or down to make adjustment.
(3) Securely tighten screw®·
* Precaution
If the screw is tighten too securely, the crank will
be abraded .
a. Feed dog
b. Throat plate
CC1088-M 0. 75-0.85mm
~~,;;-
b
GC1088-A o. 7-0.Smm
702J~~
b
GC1088-H 0.95-1. 05mm
Fig.19
702Jr~~~
b
14

From the Library of Superior Sewing Machine & Supply LLC
14. NEEDLE-TO-HOOK RELATIONSHIP ( Fig. 20 )
1.Adjust the timing between the needle and the hook
as follows:
1) Turn the handwheel to bring the needle bar down to the
lowest point of its stroke,and loosen setscrew(!).
* Adjusting the needle bar height"
2) When using the needle of DB X 1, align marker line A on
needle bar® with the bottom end of needle bar lower
bushing@, then tighten setscrew(!).
When using the needle of DAX 1, align marker line B with
it, then tighten setscrew (!).
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Fig.20
* Adjusting position of the hook
3)
When using the needle of DB X 1, loosen the three hook
setscrews, turn the handwheel, and align marker line Bon
the needle bar ® with the bottom end of needle bar lower
bushing @. When using the needle of DAX 1, align marker
line D with the bottom end of needle bar lower bushing @.
15

From the Library of Superior Sewing Machine & Supply LLC
4) After making the adjustments mentioned in the above steps
align hook blade point® with the center of needle@.
Provide a clearance of 0.04mm to 0. lIIlIIl. between the needle
and the hoo~ then securely, tighten the hook setscrews.
* Precaution
If the clearance is too small,the tip of the hook
will be abraded. If it is too big, it will lead to skip
over.
*Note that the type of hook to be substituted for, when
replacing the hook, shall be in conformity with the
very type of the hook installed in the sewing
machine
of original assemblage.
15.ADJUSTING THE HEIGHT OF THE PRESSER BAR
( Fig. 21 )
1) Loosen setscrew CD, and adjust the presser bar height and
the angle of the presser foot.
2) After adjustment,securely tighten the setscrew.
CD
Fig.21
16

From the Library of Superior Sewing Machine & Supply LLC
16.ADJ(JSTING THE THREAD TAKE-UP STROKE
{ Fig.22)
1) When sewing heavy-weight materials,move thread guide CD
to the left in direction A to increase the length of thread
pulled out by the thread take-up.
2) When sewing light-weight materials,move thread guide CD
to the right in direction B to decrease the length of thread
pulled out by the thread take-up.
3) When the marker line C on the thread guide CD is aligned
with the center of the screw, it is standard.
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Fig.22
17. INSTALLING THE BELT COVER AND THE BOBBIN
WINDER {Fig.23,Fig.24,Fig.25)
1. Installing Procudure
1) Drill four wooden screw guide holes A, B, C and D in the
machine table.
2) Insert support CD in the tapped hole in the arm.
3)
Install the front belt cover®, get the handwheel in the
middle of the hol~
4) Install the back belt cover ® at C and D.
5) Using the screw @, @ and washer ® , fix the front be1t
cover ® on the support the tighting torque for the screw
17

From the Library of Superior Sewing Machine & Supply LLC
@ is about 30 kgf • cm, for the screw® is about 25 kgf • cm.
6) Fix the cover.
7) Move the back belt cover ® backward until its rubber
touches the front belt cover@, then move further more
0. 5-lmm, fix it using the wooden screws and washers.
8) Fix bobbin winder @ at A and B using the wooden screws.
47
©
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Fig.23
Fig.24
18
63.5
75. 5
©
Unit:mm
®
Fig.25

From the Library of Superior Sewing Machine & Supply LLC
18.ADJUSTING THE HEIGHT OF THE KNEE LIFTER
( Fig.26,Fig.27)
1) The standard height of the presser foot lifted using the
knee lifter is 10mm.
2) You can adjust the presser foot lift up to 13mm using knee
lifter adjust screw(D. ( The max. lift shoule be 9mm for
GC1088-A type )
3)
When you have adjusted the presser foot 1i ft to over 10mm ,
be sure that the bottom end of needle bar ® in its lowest
position does not hit presser foot@.
---<)
Fig.26
Fig.27
19