Pegasus MHG-130/WT664-08 User manual

MHGSeries
Models: MHG-110/W664-08
MHG-130/WT664-08
MHG-140/WT664-35
Thank you for purchasing Pegasus’ automatic unit.
Study this manual very carefully before beginning any of the
procedure and then use the device correctly and safely.
Keep this manual in a convenient place for quick reference
when needed.
９Ａ２１５４Ｅ
９Ａ２１５４Ｅ９Ａ２１５４Ｅ
９Ａ２１５４Ｅ
INSTRUCTIONS
Hemming bottoms of tubular goods
and/or flat sleeves
Versatile sewing unit for hemming

1.Introduction..............................................................................................................................................................1
2.Symbols and/or icons of dangers, warnings and cautions ................................................................................1
3.Safety precautions...................................................................................................................................................2
4.Warnings and cautions in each procedure ...........................................................................................................3
Applications and performance..................................................................................................................................5
Installation...................................................................................................................................................................6
Description of each part ............................................................................................................................................7
Installing the device ..................................................................................................................................................8
Connecting the cords ................................................................................................................................................9
Connecting the air lines (MHG-110, 130) ...............................................................................................................11
Connecting the air lines (MHG-140) .......................................................................................................................12
Adjusting the filter regulator ....................................................................................................................................13
Installing the optional parts for hemming flat sleeves.............................................................................................14
Installing the knee switch that operates the fabric guide manually (option).........................................................16
Basic Adjustment .....................................................................................................................................................17
Adjusting the hem width..........................................................................................................................................18
Changing the spacer (for the fabric thickness) .......................................................................................................19
Adjusting the spacer (for the fabric edge) ............................................................................................................20
Adjusting the air blowers.........................................................................................................................................21
Sewing .......................................................................................................................................................................22
Hemming tubular goods..........................................................................................................................................23
Hemming flat sleeves..............................................................................................................................................25
Entering sewing data................................................................................................................................................28
Adjusting the machine speed..................................................................................................................................29
Adjusting the overlapping length.............................................................................................................................30
Adjusting the machine speed at the start of sewing ...............................................................................................31
Adjusting the machine speed at the end of sewing ................................................................................................34
Adjusting the stitch counter for the air blower for uncurling....................................................................................35
Adjusting the output counter ...................................................................................................................................36
Resetting the machine ............................................................................................................................................39
C
CO ON NT TE EN NT TS S

1
1.Introduction
2.Symbols and/or icons of dangers, warnings and cautions
Be sure to study very carefully f
fo or r s sa af fe et ty y.
●This instruction manual describes the instructions for using this automatic sewing unit safely.
●Study this instruction manual very carefully and understand fully how to operate, check, adjust and maintain
the automatic unit before beginning any of the procedures.
●You always perform operations close to moving parts such as needles when using industrial sewing
machines. Therefore, you have to keep in mind you could easily touch them. To prevent accidents, it is
essential that you use the safe products supplied by Pegasus correctly.
All the people who will use the automatic sewing unit must study this instruction manual and one for the
sewing machine very carefully and then take necessary safety measures before beginning any of the
procedures.
The symbols and/or icons shown below are used according to the degree of danger. To prevent accidents,
study the contents very carefully and follow the instructions.
Warning labels should be plainly visible.
Attach new labels when they are stained or removed.
Contact our sales office when new labels are needed.
Symbols and/or icons of dangers, warnings and cautions that attract users’ attention
Indicates an immediate hazard to life or limb.
Indicates potential hazards to life or limb.
Indicates possible mistakes that could result in injury or damage.
DANGER
WARNING
CAUTION

2
3.Safety precautions
Symbols and messages
Be sure to follow the instructions when you operate the machine and/or
automatic unit.
If you use the machine and/or automatic sewing unit incorrectly, your hands
and/or fingers may be injured.
Never do this.
Unplug the automatic sewing unit or shut off the power when checking,
adjusting and/or repairing the machine and/or automatic unit, or when
li
g
htnin
g
ma
y
strike.
If you use the machine and/or automatic sewing unit incorrectly, it may
cause fire.
Be sure to connect the GND wire.(Be sure to ground the automatic sewing
unit.)
If you use the machine and/or automatic sewing unit incorrectly, you fingers
and/or hands may be caught in them or it, causing trouble.
If you use the machine and/or automatic sewing unit incorrectly, you may
burn yourself.
If you use the machine and/or automatic sewing unit incorrectly, you may
get an electrical shock.
①Applications, purpose
The automatic unit is designed to increase quality and productivity
according to your needs.
Therefore never use the automatic unit for the applications, which
may defeat the above purpose.
②Circumstances
Some circumstances when you are using the automatic unit may
affect its life, function, performance, and safety.
For safety, do not use the automatic unit under the
circumstances below.
1.Do not use the automatic sewing unit near objects that make
noises, such as a high-frequency welder, etc.
2.Do not use or store the automatic sewing unit near chemicals or
in the air that has chemical vapor.
3.Do not leave the automatic sewing unit outside in an area
exposed to high temperatures and/or direct sunlight.
4.Do not use the automatic sewing unit in high humidity or ambient
temperatures that may affect it.
5.Do not use the automatic sewing unit on the condition that the
voltage fluctuation range exceeds ±10% of the rated voltage.
6.Do not use the automatic sewing unit at the place where the
supply voltage specified for the control motor cannot be properly
obtained.
7.Do not use the automatic sewing unit at the place where the air
supply specified for the automatic sewing unit cannot be properly
obtained.
8.Do not use the automatic sewing unit near water.
③Safety measures
(1)Safety precautions when you perform maintenance on
the automatic sewing unit.
●When performing maintenance such as checking, repairing,
cleaning the automatic sewing unit, turn off the power, unplug
the machine and press the machine treadle in order to make
sure the machine does not run.
Be careful when you perform the procedures with the power on.
To prevent accidents due to the unexpected start of the
automatic sewing unit and users’ misoperation, consider the
procedures for safety and follow them.

3
4.Warnings and cautions in each procedure
●Only well-trained people should perform routine daily
maintenance and/or repair the machine and/or automatic unit.
●Do not modify the machine and automatic unit yourself.
※Consult your local Pegasus’ sales office or representative for
modification.
(2) Before operating the automatic sewing unit
●Before operating the automatic sewing unit, check the machine
head and automatic sewing unit to make sure they do not have
any damage and/or defects.
Repair or replace any defective parts immediately.
●To prevent accidents, always make sure the safety covers and
safety guards are properly secured.
Never remove the safety covers and safety guards.
(3)Training
To prevent accidents, operators and service/maintenance
personnel should have proper knowledge and skills for safe
operation.
Supervisors should make educational plans for these people in
advance and carry them out.
①Unpacking
The machine and automatic unit are packed in boxes (and plastic
bags) in the factory before shipment. Unpack the boxes and bags
properly and sequentially while checking the contents are not
upside down by following the instructions on them.
②Transportation
1.More than two people should move the automatic sewing unit.
2. When moving the automatic sewing unit, considerable care
should be taken not to apply excessive physical shock and shake
because the sewing machine head could be removed and
dropped from the unit.
③Installation , preparation
Connecting the air lines
1.Always turn off the power first and then connect the air lines to
the joints. Be sure to connect all the air lines before connecting
them to the air source.
2.When connecting the air lines to the joints, be sure to insert the
joints to the proper depth of the air lines and fasten securely.
3.Do not allow excessive force to be exerted on the air lines while
using the automatic sewing unit.
4. Do not bend the air lines too much.
5.If necessary, protect the air lines by positioning them safely
and/or using the cover.
6. Never use staples to secure the air lines. Otherwise it
may cause damage.
Connecting the cords
1. When connecting the power cord, be sure to turn off the
power and disconnect the power plug from the outlet.
2. Check the voltage designation to make sure the power
relay cord matches the local supply voltage. The use of wrong
cord may cause damage to parts and/or fire.
3.Do not allow excessive force to be exerted on the cords while
using the automatic sewing unit.
4. Do not bend the cords too much.
5.When connecting the cords, check to make sure there is at least
25mm between the moving parts, such as the pulley or V belt and
the cords.
6.If necessary, protect the cords by positioning them safely and/or
using the cover.
7. Never use staples to secure the cords. Otherwise it may
cause damage, a short circuit and/or a fire.
Ground
1.Connect the GND wire correctly. Do not connect the GND wires
of other machines to the GND terminal of this unit.
2. Connect the GND wire securely to the specified terminal on
the machine bed.

4
④Before operation
1.Check the cords, connector and air lines to make sure they do no
t
have any damage, disconnection’s or tangles and then turn on the
power.
2. Never bring your hands and/or any part of your body close
to the needle when turning on the power.
3.Well-trained people who have studied this instruction manual ver
y
carefully should use the automatic sewing unit.
4.Read ad study the contents on “2. Symbols and/or icons of
dangers, warnings and cautions” very carefully and then provide
users with safety training if necessary.
⑤Precautions for work and operation
1. The area near the presser foot is very dangerous during
sewing. Do not bring your hands and/or any part of your body
close to the presser foot.
2.To prevent accidents, be careful that any foreign matter such as
water, other liquids or metals do not get into the automatic sewing
unit.
3.Wear clothes that cannot be caught in the automatic unit.
4. Do not leave tools or other unnecessary objects near the
automatic unit.
5.To prevent accidents, always make sure the safety cover are
properly secured.
6.Drain and clean the filter regulator periodically if the automatic
sewing unit is pneumatic. Otherwise drainage will flow into the
solenoid valve and/or air cylinder, causing trouble.
7.Always turn off the power before leaving the automatic unit.
8.If any trouble occurs, stop using the automatic unit and turn off
the power. Check, repair and/or perform other necessary
procedures immediately.
9. To prevent injury to your hands and/or fingers by the
cutting edge of the knife, great care should be taken when you
perform the procedures.
⑥Maintenance, check, repair
1.Well-trained people who have studied this instruction manual ver
y
carefully should maintain, check and repair the machine and
automatic unit.
2.Perform routine daily maintenance and periodical maintenance b
y
following this instruction manual.
3.Use Pegasus’ genuine parts when repairing and/or replacing
parts. Pegasus assumes no responsibility for accidents caused
by improper repair/adjustment and/or use of parts which are not
genuine.
4. Do not modify the automatic unit yourself.
Pegasus assumes no responsibility for accidents caused by
modification.
5.After maintaining, checking, and/or repairing the machine and
automatic unit, always make sure that any trouble dose not occur
when the power is turned on.
6.To avoid trouble, before and after operation clean the automatic
sewing unit by removing lint and contaminants.
7.If the safety covers are removed for a check and maintenance, be
sure to replace them.

5
Applications and performance
Features:
For hemming bottoms of tubular goods and/or flat sleeves, such as
T-shirts, polo shirts, etc.
MHG (versatile sewing unit for hemming) automates and deskills what
had been a difficult hemming operation. When hemming bottoms on
tubular goods, all you have to do is position the fabric.
The unit forms the hem using the guide.
This guide automatically open/close during sewing. In addition, the
machine will stop automatically when the sensor detects the
overlapped seams.
Thanks to these features, even if the size of the fabric is changed, the
overlapped seam length is always constant without additional settings.
The optional parts are necessary for hemming on flat sleeves.
Hem width: 15 ~ 35mm
Minimum circumference: 360mm

6
I
In ns st ta al ll la at ti io on n
MHG
-100 Series
Versatile sewing unit for hemming

7
Installation
Mechanic level Description of each part
Fig.1 Description of each part
Spacer
Hemming guide
Sewing start detection switch
Air cylinder
Air blower for uncurling the fabric
Fabric guide
A
ir blower for positioning the fabri
c

8
Installation
Mechanic level
Installing the device
Fig. 2 To install the device
①
②
③
④
⑤
Always turn off the power, unplug the machine and then
well-qualified technicians should install the device.
Install the device by referring to sequence ①～⑤ as shown below.

9
Installation
Mechanic level
Connecting the cords
Always turn off the power, unplug the machine and then
well-qualified technicians should connect relay cords.
●Match the colors and shapes of the connectors when
connecting the relay cords.
Faulty wiring of the relay cords may cause a malfunction.
To prevent accidents and damage to the machine, check
the relay cords for correct wiring.
Proximity sensor
Relay cord
Relay cord
Relay cord
Solenoid valve
561010-91
Solenoid valve assy
Solenoid valve assy
Relay cord
Relay cord
Knee switch
※Option parts
Solenoid valve assy
※For MHG-120,140
Fig.3 To connect the cords
●To disconnect the locking connector, pull the connector
while pressing locking mechanism ①with your thumb.

10
Installation
Mechanic level
Connecting the cords
Always turn off the power, unplug the machine and then
well-qualified technicians should connect relay cords.
●Match the colors and shapes of the connectors when
connecting the relay cords.
Faulty wiring of the relay cords may cause a malfunction.
To prevent accidents and damage to the machine, check
the relay cords for correct wiring.
Fig.4 To connect the cords (2)
1CC 23C 4 C 5 C
Solenoid valve assy Solenoid valve Solenoid valve
Black
Red
Black
Red
White White
Black Black
Red
Green
Terminal board
Common cord
Relay cord Relay cord
Position
SleeveBottom
Toggle switch

11
Installation
Mechanic level
1
2
3
4
5
Connecting the air lines
(MHG-110, 130)
Fig.5 To connect the air lines
(MHG-110, 130)
A
lways turn off the power and shut down the air compresso
r
first and well-qualified technicians should connect the air
line.
Before connecting to the air compressor (air source), all
the air lines should be connected completely.
Improper piping of the air lines may cause a malfunction.
To prevent accidents and damage to the machine, check all
the air lines for correct piping.

12
Installation
Mechanic level
Connecting the air lines
(MHG-140)
Fig.6 To connect the air lines
(MHG-140)
1
2
3
4
5
Always turn off the power and shut down the air compresso
r
first and well-qualified technicians should connect the air
line.
Before connecting to the air compressor (air source), all
the air lines should be connected completely.
Improper piping of the air lines may cause a malfunction.
To prevent accidents and damage to the machine, check all
the air lines for correct piping.

13
Installation
Mechanic level
Adjusting the filter regulator
Fig. 8. To adjust the filter regulator
To increase
pressure
To decrease
pressure
④
⑤
⑥
①
②
③
To adjust the filter regulator, turn off the power and finish air
piping and then turn on the air compressor.
Be sure to drain periodically before drainage level reaches
the baffle. Otherwise the drainage will flow into the
solenoid valve or air cylinder and may cause trouble. Note
that drainage spouts downward with air.
(1) Connecting the air hose
Fasten coupler ①firmly onto the air hose from the air
compressor with hose clamp ②. Pull collar ③toward
you (see the illustration) and then press the air hose
onto the joint on the filter regulator. Replace collar ③.
(2) Adjusting air pressure
Pull up knob ④on filter regulator until it clicks. Then
set the air pressure at 0.5Mpa. (5kgf/cm2).
●To increase the air pressure, turn knob ④clockwise.
●To decrease the air pressure, turn knob ④
counterclockwise.
(3) Draining the filter regulator
Drain the filter regulator by pressing button ⑥before
drainage level reaches baffle ⑤.
Fig. 7. To connect the air hose

14
Installation
Mechanic level
Installing the optional parts
for hemming flat sleeves
To
gg
le Switch
Fig.9 Toggle switch
Fig. 10 To install the optional parts for hemming flat sleeves.
Always turn off the power, unplug the machine and then
well-qualified technicians should install the device.
1.Flip the switch to [Hemming sleeve].
2. Install the optional part for sleeve hemming.

15
Installation
Mechanic level
Installing the optional parts
for hemming flat sleeves
Fig. 11 To change the connection of the sensor cord.
3. Change the connection of the sensor cord.

16
Installation
Mechanic level
Installing the knee switch that operates
the fabric guide manually (option)
Fig. 12 To install the optional knee switch
Connect the cords by referring to
“Connecting the cords” on page 9.
Always turn off the power, unplug the machine and then
well-qualified technicians should install the device.
Install the knee switch by referring to the illustration below.

17
B
Ba as si ic c A Ad dj ju us st tm me en nt t
MHG
-100 series
Versatile sewing unit for hemming