HIGHLEAD GM700 Series User manual

HIGH LEAD
GM700 Series
Purchasing Dept
Copy
HIGH-SPEED OVERLOCK SEWING MACHINE
Instruction Manual
Parts Catalog
SHANGHAI HlllGONG N0.3 SE,VING MACHINE FACTORY

- INTRODUCTION -
Thank you very much for purchasing 700 Series machine.
This instruction manual describes daily routine maintenance and safety precautions to keep the machine
in the best possible conditions.
Please study this manual very carefully before operating the machine.
CHUTION
OBSERVE THESE SAFETY PRECAUTIONS
Though Pegasus takes the utmost care to produce safe sewing machines and devices, operators
should follow these basic safety rules.
• To prevent accidents, do not remove safety devices or parts while operating the machine.
• Do not leave tools or other unnecessary objects on the machine table while operating the
machine.
8 Before maintenance, adjusting, cleaning, threading or replacing the needle, and to prevent
accidents, be sure the power is turned off, Check that the machine will not operate when the
pedal is pressed.
NOTE
In case a crutch type motor is used, it will keep on rotating by inertia after turning off power supply
CD. If the machine pedal ® is stepped on inadvertently, it is dangerous because the machine will move
unexpectedly. Keep
on stepping on the machine pedal (2.) until the machine comes to a stop after turning
off power supply CD.
', ~.--1~~~)
',
' .
....__
• Turn the power off before leaving the machine table.
8 In the event of a power failure, be sure to turn the machine off.
8 Check that the machine is securely grounded.

CONTENTS
• BEFORE OPERATING
l . Schematic diagram of the machine table .....•••....•.•.............•••.....•.......... l
2. Installing the machine head ..••.••........••....•.•......•............•.....•...... 2
3. The machine speed and the turning direction ..........•................................ 3
4. Lubrication
.•................................................................... 4
5. Manual lubrication ••........•.......••....................•....................•. 5
6. Filling the HR device with silicon oil .....................................••......... 6
7. Threading
.....•......................................... ~ ...................... 7
• TEST SEWING
l . Adjusting the presser foot pressure ................................................... 8
2. Adjusting the diff. feed ratio ....................................................... 9
3. Adjusting the stitch length ......•................................................. 10
4. Adjusting the thread tension ....................................................... 11
• MAINTENANCE DURING USE
l . Cleaning the machine ...•....................................................... 12
2. Replacing the needle ...............•............................................ 13
3. Checking the oil circulation ................... ; ................................... 14
4. Replacing the oil
............................................................... 15
5. Replacing the lower knife ........................................................ 16
6. Adjusting dimensions ............................................................ 17
7. Standard needle Comparison table of equivalent sizes ................................. 17
• PARTS CATALOG
................................................................... 18-25

Ill BEFORE OPERATING
Schematic diagram of the machine table
Cut the table referring to the diagram
Note :
I!
1
------(525)----------
----See Notec-------as-
.-------294-----
r------ 262-----i
---236----
Right side
48 _ __. ___ 16
,.__ 75_..
,_A
~----- - ----r--t---t----
-- -- -- ------·------- --- - --,--~-------
L---------"----------1--1------------
Left side
30--28
----183---
----210----1
Standard dimention
----234-----
Section A-A ( X 4)
Section 8-8 ( X 3)
I l Dimension for motors in Japan ............................•...... 306mm
2) Dimension for Efka motor ..................................... 334mm
- l -

BEFORE OPERATING
Installing the machine head
1. Mount the machine head on the machine rest board.
2. Install ground wire at PE.
3. Adjust the tension of the belt so that it can be about 2cm bent inward when you press the middle of it.
Adjust the height of the motor to do this.
4. Install the belt cover referring to the Figure.
2cm
-- 2 -

1111 BEFORE OPERATING
The machine speed and the turning direction
The machine rotates clockwise when seen from the machine pulley side.
~·
Make sure your machine type and run it not
exceeding the maximum speed as listed
in the table.
Machine model
The highest speed(r. p. m)
GM700-508 6, 500
GM700-5
6,
500
GM700-507
5,
500
GM700-504
6,
500
GM700-502 5, 500
GM700-302
7,
000
GM700-4
6,
500
GM700-304 6, 000
GM700-3 I 7, 000

II BEFORE OPERATING
Lubrication
After filling the oil pan, the oil surface should lie between (H) and (L) lines.
Add oil when the oil surface reaches or goes below (L).
Note : Use recommended oil (HIGH SPEED SEWING MACHINE OIL) (ISO VG22)
-4-

Ill BEFORE OPERATING
Manual lubrication
Apply 2 or 3 drops of oil by hand when the machine is used for the first time or has been left unused for some
time.
Note : Use recommended oil (HIGH SPEED SEWING MACHINE OIL) (ISO VG22)
I
HIGH SPEED SEWING MACHINE OIL
-
:)

• BEFORE OPERATING
Filling the HR device.with silicon oil
Fill the HR device with oil before it is too low in order to prevent needle thread breakage and fabric
damage.
Note : Use recommended silicon oil
-6-

Ill BEFORE OPERATING
Needle thread
Trim the knots offneatly before
passing through the eye
of the ,
needle to rethread.
,./
Looperthread
Trim the knots off neatly after
passing through the eye
of the
lopper.
-~ 7 -
(1\ Open three covers.
,A. \__I_) Swing the presserfoot aside.
Knot the presetthread and the
thread being used together to
thread the machine.

• TEST SEWING
Adjusting the presser foot pressure
Tum adjusting screw to adjust the presser foot pressure. It should be ad light as possible, yet be sufficient to
obtain the proper stitch formation.
Light
/j
I
-8-

Ill TEST SEWING
Adjusting the diff. feed ratio
Loosen the nut and move the lever op and down to obtain the correctdifferential feed ratio,
Tighten the nut after positioning the lever as desired.
To shrink

TEST SEWING
Adjusting the stitch length
l . While pressing the push button, turn the hand wheel to seek the position at which the push button goes
further into the depth.
2. Then, keeping the push button pressed, turn the hand wheel and, set the desired scale to the aligning mark.
Note : Stitch length adjustment must only be made after the differential feed ratio has been changed.
Handweel
I
/
/
- 10-

Ill TEST SEWING
Adjusting the thread tension
Make tension adjustments with the needle thread knob CD the upper looper knob ® and the lower looper
knob
®·
@
~·~
~·
. -
•. To tighten
'
To loosen
- II--

Ill MAINTENANCE DURING USE
Cleaning the machine
Mainly the slots of the needle plate and the feed rows should be cleaned.
- 12--

II MAINTENANCE DURING USE
Replacing the needle
Check the needle carefully to see that the start is scarf to the rear of the machine.
Insert the needle to the proper depth, and fasten securely.
Be sure to use standard needle. Refer to ADJUSTMENT DIMENSIONS on the end of instructions.
- 13-
OK! NO!
l
I
~~ S~rt
·+· ·+

Ill MAINTENANCE DURING USE
Checking the oil circulation
QK! Operating
~ 14--

·II MAINTENANCE DURING USE
Replacing the oil
Replace the oil one month after the first use and every six months thereafter. (See PS)
- 15-

a MAINTENANCE DURING USE
To remove the lower knife
Loosen the screw.
To replace the lower knife
Loosening the screw @
makes the lower knife
holder slide to the right.
Replacing the lower knife
-Turn the handwheel
as the drawing on the
right figure.
Correct angles to resharpen the
lower knife
;...
I 450
' ....
i .
GM700-5.502.504.507.50.B/ n! ,
0 _,/ l
/75--....,. . '
·< I I
GM?00-3.302.304.4
I I
I l
! I
i \
l I
,__,
\ ~· ./
Y'--750 n
\ / /
~ .. / I
\ u
\
Cutting edge of the
lower knife B I Upper knife
/
"'1 Top surface of
the needle
place A
-- Jo-
Level of (A) = Level of (B)
Chek cutting action of knives.