Texi Twin MS User manual

TEXI Twin MS operation manual
Operaon manual
High speed two needle lockstch
sewing machine
Twin MS

TEXI Twin MS operation manual

TEXI Twin MS operation manual
CONTENTS
1. NAMES OD MAJOR PARTS ……………………………………………………………………………………….…….……..
2. MACHINES SPECIFICATIONS …………………………………………………………………………………….……..…...
3. INSTALLATION .............................................................................................................................................................
3-1. Installing the oil pan .......................................................................................................................................
3-2. Installing the machine head …………………………………………………………………………………....…...
3-3. Installing the knee lifter assembly …………………………………………………………………………………..
3-4. Installing the belt ……………………………………………………………………………………………….……..
3-5. Installing the belt cover ……………………………………………………………………………………………….
3-6. Installing the cotton stand …………………………………………………………………………………….……...
3-7. Lubrication……………………………………………………………………………………………………….……..
3-8. Checking the machine pulley rotating direction .............................................................................................
4. PREPARATIONS BEFORE SEWING ...........................................................................................................................
4-1. Installing the needle .......................................................................................................................................
4-2. Removing the bobbin or cap ..........................................................................................................................
4-3. Winding the lower thread ...............................................................................................................................
4-4. Installing the lower bobbin or cap ..................................................................................................................
4-5. Threading the upper thread ...........................................................................................................................
4-6. Adjusting the stitch length ..............................................................................................................................
4-7. Corner sewing method ...................................................................................................................................
5. SEWING ........................................................................................................................................................................
5-1. Sewing ……………………….……………………………………………………………..………………………….
5-2. Backtacking ....................................................................................................................................................
6. THREAD TENSION .......................................................................................................................................................
6-1. Adjusting the thread tension ..........................................................................................................................
6-2. Adjusting the presser foot pressure ...............................................................................................................
7. CLEANING ....................................................................................................................................................................
8. STANDARD ADJUSMTNETS .......................................................................................................................................
8-1. Adjusting the feed dog height ........................................................................................................................
8-2. Adjusting the presser foot height ...................................................................................................................
8-3. Adjusting the thread tension spring ...............................................................................................................
8-4. Adjusting the needle and rotary hook timing ..................................................................................................
8-4-1. Needle to rotary point gap ………………………………………………………………………………………...
8-4-2. Clearance between rotary hook and needle plate ……………………………………………………….……..
8-4-3. Clearance between rotary hook and opener …………………………………………………………….……...
8-4-4. Needle bar height and lift amount ………………………………………………………………………………..
8-5. Adjusting the rotary hook lubrication amount …………………………………………………….…….…….…...
8-6. Adjusting the needle and feed timing …………………………...………………………………….………..…….
8-7. Oil adjust at the front of machine ..................................................................................................................
9. REPLACING GAUGE PARTS (CHANGING THE NEEDLE WIDTH) ...........................................................................
10. TROUBLESHOOTING GUIDE ....................................................................................................................................
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TEXI Twin MS operation manual
CAUTION
Enviromental Requirements
Sewing
Be sure to wear protective goggles when using the machine. If goggles are not worn, there is the danger that if
a needle breaks, parts of the broken needle may enter your eyes and injury may result.
Use the sewing machine in an area free from
sources of strong electrical noise such as
high-electrical noise may cause problems with
correct operation.
Any fluctuations in the power supply voltage
should be within ± 10% of the rated voltage for
the machine. Voltage fluctuations which are
greater than this may cause problems with
correct operation.
The power supply capacity should be greater
than the requirements for the sewing machine’s
electrical consumption. Insufficient power supply
capacity may cause problems with correct
operation.
The pneumatic delivery capability should be
greater than the requirements for the sewing
machine’s total air consumption. Insufficient
pneumatic delivery capability may cause
problems with correct operation.
The ambient should be within the range of 5°C to
35°C during use. Temperatures which are lower or
higher than this may cause problems with correct
operation.
The relative humidity should be within the range
of 45% to 85% during use, and no dew formation
should occur in any devices. Excessively dry or
humid enviromentts and dew formation may cause
problems with correct operation.
Avoid exposure to direct sunlight during use.
Exposure to direct sunlight may cause problems
with correct operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
Lightning may cause problems with correct
operation.
NOTES ON SAFETY
Thank you very much for buying a sewing machine. Before using your new machine please read the safety instructions
and the explanations given in the instruction maunal.
With industrial sewing machines it is normal to caryy out work while positioned directly in front of moving parts such as the
needle and thread take-up lever and consequently there is always a danger of injury that can be caused by these parts. Follow
the instructions from training personel and instructors regarding safe and correct operation before operating the machine so
that you will know how to uses it correctly.
SAFETY INSTRUCTIONS
Safety indications and their meanings
This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure
safe operation of this machine and to prevent accidents and injury to yourself or other people. The meanings of these
indications and symbols are given below.
CAUTION The instructions which follow this term indicate situations where failure to follow the instructions
could cause injury when using the machine or physical damage to equipment and surroundings.
This symbol indicates something that you should be careful of. The picture inside the triangle indicated the natu-
re of the caution that must be taken.
This symbol indicated something that you must not do.
This symbol indicated something that you must do. The picture inside the circle indicated the nature of the thing
that must be done (e.g. symbol at the left means you must make the ground connection).

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TEXI Twin MS operation manual
CAUTION
Installation
Sewing
Cleaning
Maintenance and inspection
Machine installation should only be carried our by
a qualified technician.
Contact your dealer or a qualified electrician for any
electrical work that may need to de done.
The sewing machine weights more than 65 kg.
The installation should be carried out by two or more
people.
Do not connect the power cord until installation is
complete. Otherwise the machine may operate if
the treadle is pressed by mistake, which could result
injury.
Be sure to connect the ground. If the ground
connection is not secure, you run the risk of receiving
a serious electric shock.
All cords should be secured at least 25 mm away
from any moving parts. Furthermore do not
excessively bend the cords or secure too firmly with
staples, otherwise shocks could occur.
Be sure to wear protective goggles and gloves when
handling the lubricating oil, so that no oil gets into
your eyes or onto your skin, otherwise inflammation
can result.
Furthermore do not drink the oil under any
circumstances as it can cause vomiting and
diarrhoea. Keep the oil out of the reach of children.
The sewing machine should only be used by
operators who have received the necessary training
in safe use beforehand.
The sewing machine should not be used for any
applications other than sewing.
Turn off the power switch at the following. The motor
will keep turning even after the power is switched off
as a result of the motor’s inertia. Wait until the motor
stops fully before starting work.
- When threading the needle
- When replacing the needle and bobbin
- When not using the machine and when leaving the
machine unattended.
Turn off the power switch before carrying out
cleaning. The motor will keep turning even after
the power is switched off as a result of the motor’s
inertia. Wait until the motor stops fully before starting
work. The machine may operate if the treadle is
pressed by mistake
Attach all safety devices before using the sewing
machine. If the machine is used without these
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing as this may
result in personal injury or damage of the machine.
In an error occurs in machine or if abnormal noises
or smells are noticed mmediatelly turn off the power
switch. Then contact your nearest sealer or
a qualified technicain.
If the machine develops a problem contact your
nearest dealer or qualified technician.
Be sure to wear protective goggles and gloves when
handling the lubricating oil so that no oil gets into
your eyes or onto your skin. Otherwise inflammation
can result. Furthermore do not drink oil under any
sircumstances as it can cause vomiting and
diarrhoea. Keep the oil of hte reach of children.
Maintenance and inspection of machine should only
be carried out by a qualified technician.
Ask your dealer or a qualified electrician to carry any
maintenance and inspection o felectrical system.
Turn off the power switch and disconnect the power
cord from the wall outlet at the following times.
Otherwise the machine may operate if the threadle is
pressed by mistake. The motor will keep turning after
the power is switched off as a result of motor’s iner-
tia. Wait until motor stops fully before starting work.
When checking the rotary hook lubrication do not
touch moving parts such as the rotary hook, needle
and needle bar with your finger or paper. Otherwise
injury or damage of machine may result.
In any safety devices have been removed be absolu-
tely sure to re-install them to their original positions
and check if they operate correctly.
Any problems in machine operation which result from
unauthorized modifications to the machine will not be
covered by the warranty.

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TEXI Twin MS operation manual
Warning labels
The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all when using
the machine.
Moving parts may cause injury. Operate with safety devices. Turn off main switch before threading, changing
bobbin and needle, cleaning etc.
Be sure to connect the ground. If the ground conection is not secure you run the risk of receiving a serious
electric shock.
Direction of operation.

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TEXI Twin MS operation manual
1. NAMES OF MAJOR PARTS
(1) Needle plate (2) Face plate (3) Oil gauge window (4) Oil controlling screw at front of machine
(5) Machine pulley (6) Reverse stitching lever (7) Stitch length dial (8) Winder clamp (9) Bobbin winder
Safety devices
(10) Finger guard (11) Thread take-up cover (12) Belt cover
2. MACHINE SPECIFICATIONS
Twin needle, needle feed, split needle bar lockstitch machine
Sewing speed 3000 s.p.m.
Max. stitch length 5 mm
Presser foot height (foot lifter) 7 mm
Presser foot height (knee lifter) 13 mm
Feed dog height 1 mm
Needle DPX5 (135x5)
Needle feed mechanism Yes
Single needle stop mechanism Yes
3. INSTALLATION
CAUTION
Machine installation should only be carried out by
a qualified technician.
Contact your dealer or a qualified electrician for any
electrical work that may need to be done.
Installation for sewing machine should be carried out
by two or more people.
Do not connect the power cord until installation is
complete. The machine may operate if the threadle
is pressed by mistake, which could result in injury.
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip and your hand
may get caught.

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TEXI Twin MS operation manual
About the machine set up location
Do not set up this sewing machine near other equipment such as televisions, radios
or cordless telephones. Otherwise such equipment may be affected be electronic
interface from the sewing machine.
The sewing machine should be plugged directly into an AC wall outlet. Operation
problems may result if extension cords are used.
Carrying the machine
The machine should be carried by the arm by two people as shown in the illustration.
Hold the motor cover (A) by hand also so that the pulley does not rotate.
Tilting back the machine head
Hold section (B) with your foot so that the table does not move and then push the arm
with both hands to tilt back the machine head.
Returning the machine head to the upright position
Clear away any tools etc. Whch may be bear the table holes.
While holding the face plate with your left hand, gently return the machine head to
the upright position with your right hand,
3-1. Installing the oil pan
1. Insert four oil cushions (2) into the oil pan (1) from below so that
the four corner holes are aligned.
2. Place the oil pan (1) into the groove in the work table so that
corners are aligned.
3. Place four head cushions (3) on top of the corners in the oil pan
(1) and then secure with four nails (4).
4. Insert two rubber cushions (5) into the notches in the work table
and then secure them with two nails (6).

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TEXI Twin MS operation manual
3-2. Installing the machine head
1. Place the knee lifter assembly (1) onto the knee lifter bar (2)
on the oil pan and then secure if by tightening the bolt (3).
2. Adjust the knee lifter.
1) Lower the presser foot (4) by using the presser bar lifter (5).
3-3. Installing the knee lifter assembly
1. Insert the knee lifter complying bar (1).
2. Insert two hinges (2) into the holes in the machine bed.
3. Clamp hinges (2) onto the rubber cushions (3) in the work table
and then place the machine head onto the head cushions (4)
which are on top of the oil pan corners.
4. Tap the pillow (5) into the table hole.
NOTE: Tap the pillow securely into the table hole. If the pillow is
not pushed in as far as it will go the machine head will not be
sufficiently stable when it is tilted back.
Remarks: Supprt pin must be installed reliably, otherwise there is
danger when the machine is turned over.
2) Loosen the nut (6).
3) Turn the screw (8) to adjust so that the amount of play in
the knee lifter (7) is approximately 2 mm when the knee
lifter plate (1) is gently pressed.
4) Securely tighten the nut (6).
5) Loosen the nut (9).
6) Turn the screw (10) until the distance between the end of
the screw (10) and the knee lifter (7) is approximately 8 mm.
7) Turn the screw (10) to adjust so that the presser foot (5) is
at the desired position within a distance of 13 mm of the
needle plate when the knee lifter (1) plate is fully pressed.
8) After adjustment is completed, securely tighten the nut (9).

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TEXI Twin MS operation manual
3-4. Installing the belt
1. Tilt back the machine head and then place the belt (1) onto the
motor pulley and the machine pulley.
2. Turn the nut (2) to adjust so that there is a 10-20 mm of deflaction
in the belt when it is pressed with a finger with a force of 9.8 N.
3-5. Installing the belt cover
1. Tilt back the machine head.
2. Attach the screw (2) and washers (3) to the ruber cushions on
the inside of the belt cover U (1) (in four places).
3. Place belt cover U (1) onto the machine pulley and then return
the machine head to its original position.
4. Tighten the four screws (2) attached in step above and the screw
(4) to install belt cover U.
5. Place belt cover D (5) so that it overlaps the belt cover U (1) by
2-3 mm and then provisionally tighten the screws (6).

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TEXI Twin MS operation manual
6. Insert the cover (7) of belt cover D (5) in between the cover U (2)
and belt cover D (5) and then place it into the groove cover D (5).
7. Slide the cover (7) down along the groove of belt cover D (5) as
far as it will go.
8. Pull belt cover (7) toward you until there is no clearance between
the belt cover U (1) and the cover of (7) belt cover.
9. Fully tighten two screw (6) (refer to step 5.).
3-6. Installing the cotton stand
Assemble the cotton stand (1) while refering to the cotton stand
instruction manual and then install the cotton stand to the far right
corner of the work table.
3-7. Lubrication
Lubrication
Fill in the oil slot with oil until the oil come to the level. Use only
machine oil specified be your dealer e.g. Spirit 2 vaseline oil.
Installing the filting block
Put the filting block (1) into the oil plate folling the position (2) oil
filter (3) press the filting block.

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TEXI Twin MS operation manual
When oil lubriction works normal, runs machine at 1000 rpm, we can see
splashing oil through oil window.
Notice! Screw (1) has been adjusted to the regulated position, so please don’t
turn it when adjusting the oil quantity.
Add 1-2 drops of oil in the places indicated be the arrows.

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TEXI Twin MS operation manual
3-8. Checking the machine pulley rotating direction
1. Turn the machine pulley to move the needle bar to its highest
position.
2. Loosen the screws (1), hold the needles (2) with their long groove
facing inward, insert all the way into the needle bars and re-tighten
the screws (1).
4. PREPARATION BEFORE SEWING
4-1. Installing the needle
1. Insert the power cord plug into the wall outlet and then turn on the
power switch.
2. Depress the threadle and check if the direction of rotation of the
machine pulley matches the direction of the arrow (1).
If the direction of rotary is reserved, change the direction of rotation to
the correct direction while referring to the instruction manual for the
motor.
4-2. Removing the bobbin or cap
1. Raise the needle (1) to the highest positions and open the side
plates (2) by moving them to the right and left.
2. After lifting up the rotary hook latch (3) tilt the corner of the cap (4)
to remove the cap (4).
4-3. Winding the lower thread
1. Place the empty bobbin (1) on the bobbin winder spindle (2).
2. Thread the thread and wind it round bobbin (1) a few in clockwise
direction.
3. Set the preliminary thread tension by turning milled screw (3).
4. Press lever (4) in the direction of the arrow until it clicks into place.

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TEXI Twin MS operation manual
4-4. Installing the cap
1. Insert the bobbin (1) into the cap (2) so that the winding direction is
as shown in the illustration.
2. Thread the thread by one of the following methods in accordance
with the shape of the cap being used.
1) Pass the thread through slot (A) and under the tension spring (3).
2) Pass the thread through slot (B) and (C) and then through the
thread loosening prevention spring.
3) Pass the thread through the hole (5) and pull out about 50 mm.
3) Turn the machine pulley to raise the needle to its highest position.
4) Insert the cap (2) into the rotary hook.
5) Push latch (7) to the rotary hook flat.
6) Close the bed slide.

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TEXI Twin MS operation manual
4-5. Threading the upper thread
1. Turn the mcahine pulley and raise the thread take-up lever before threading the upper thread. This will make threading
easier and it will prevent the thread from coming out at the sewing start.
2. Thread the left side thread first.
3. The position of the finger guard is adjustable. Be sure to lower it once threading has been completed.
Pass the thread correctly between the tension discs.
Cotton thread
Arm thread guide
Felt
Arm thread guide
Synthetic thread
Pass the thread through the needle eyes from inside to outside.
Pull out about 50 mm of the thread through each of the needle
eyes. If synthetic thread is used, use the felt in the arm thread guide.
4-6. Adjusting the stitch length
Turn the stitch length dial (1) clockwise or counterclockwise that
the desired stitch length is at the uppermost position of the dial.
The larger the number, the longer the stitch will be.

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TEXI Twin MS operation manual
4-7. Corner sewing method
Note: If using this machine in place os a single-needle machine, remove the needle which is not being used. In such cases,
do not use the producers given below to stop the unused needle bar from moving. Otherwise damage to the machine may
result.
To stop needle bars (right and left)
Operate the stop lever after the needle has penetrated the material and has moving.
Do not sew at speeds of over 1000 spm while one of the needle bars been stopped.
To stop operation of the left needle bar move the stop lever (1) to
the (L) position.
To stop operation of the right needle bar move the stop lever (1) to
the (R) position.
To resume twin needle sewing press the push lever (2). The stop
lever (1) will return to its original position automatically.
5. SEWING
5-1. Sewing
1. Lower the finger guard (1).
2. While holding the two upper threads with your fingers, turn the
machine pulley by hand toward you until the lower threads come
out onto the feed dog.
3. Pull the lower threads toward you and check that they pull out
smoothly.
4. Turn on the power switch.
5. Depress the threadle to start sewing.

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TEXI Twin MS operation manual
5-2. Backtacking
When the reverse stitching lever (1) is pushed, the cloth feed direction
will be reserved and when it is returned to its original position, the feed
direction will change back to normal.
6. THREAD TENSION
6-1. Adjusting the thread tension
Good, even stitches
Upper thread tension is too strong or lower thread tension is too weak.
Upper thread tension is too weak or lower thread tension is too strong.
Lower thread tension
The tension of the lower thread varies with the kind of cloth and
thread and can be adjusted by turning the lower thread tension
adjustment screw (1).

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TEXI Twin MS operation manual
Upper thread tension
After the lower thread tension has adjusted, adjust the upper thread
tension so that a good, even stitch is obtained.
1. Lower the presser goot
2. Adjust by turning the thread tension nut.
6-2. Adjust the presser foot pressure
Correct stitch
Skipped stitches occure (Increase the pressure)
Uneven stitch length (Increase the pressure)
Stitches are puckered (Decrease the pressure)
The presser foot pressure should be as weak as possible but strong
enough so that the material dose not slip.
1. Loosen the adjustment nut (1).
2. Turn the adjustment screw (2) to adjust the presser foot presssure.
3. Tighten the adjustment nut (1).
7. CLEANING
The following cleaning operations should be carrried out each day in order to maintain the performance of this machine and
to ensure a long service life. Furthermore, if the sewing machine has not been used for a long period of time, carry out the
following cleaning procedures before using it again.
Cleaning the rotary hook.
1. Turn the machine pulley to raise the needle to its highest position.
2. Open the left and slide plates.
3. Remove the bobbin or the cap.
4. Remove all thread scraps from inside the rotary hook.
5. Replace the bobbin or the cap.

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TEXI Twin MS operation manual
Lubrication
Lubricate the sewing machine according to the procedure on page 9
1. Check that the upper threads have been threaded correctly.
2. Check that the end of the needle is not broken. If the end of
the needle is broken, the needle should be replaced.
3. Lower the finger guard (4).
4. Carry out a test sewing.
8. STANDARD ADJUSTMENTS
8-1. Adjusting of the feed dog height
1. Turn the pulley until the feed dog (1) rises to the highest position.
2. Tilt back the machine head.
3. Loosen screw (2) and raise or lower the feed dog holder (3) so that
the feed dog (1) will rise to about 1 mm above the needle plate.
4. Tighten the screw (2).
8-2. Adjusting the presser foot hight
1. Loosen the nut (1) and then loosen the presser foot adjustment
screw (2).
2. Open the face plate.
3. Raise the presser foot (4) with the presser foot lifter (7).
4. Loosen the screw (5) and then move the needle bar (6) up or
down to adjust so that the presser foot (4) is approximately 7 mm
above the top of the needle plate.
NOTE: Be careful no to rotate the needle bar (6).
5. Tighten the screw (5).
6. Adjust the presser foot pressure by turning the presser foot
adjustment screw (2) and tighten the nut (1).

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TEXI Twin MS operation manual
8-3. Adjusting the thread tension spring
Thread take-up spring tension
1. Open the face plate.
2. Loosen the screw (5).
3. Loosen the knob and then rum the thread tension stud (7) to
adjust the tension.
4. Tighten the screw (5) and then tighten the knob (6)
Thread take-up spring R (2)
1. Loosen the set screw (8).
2. Loosen the knob (6) and then turn the adjustment knob (9) to
adjust the tension.
3. Tighten the screw (8) and then tighten the knob (6).
Operating range of thread take-up spring
The standard operating range for thread take-up spring L (1) and
thread take-up spring R (2) is 5-10 mm for both springs.
1. Loosen the left and right screws (3) and then turn the right thread
take-up spring stoppers (4) to adjust the operating spring.
2. Tighten the screw (3).
Thread take-up spring operation timing
The standard operation take-up spring L (1) and thread take-up
spring R (2) in the middle position within the operating range of the
thread take-up spring guide (10).
1. Loosen the screw (11).
2. Loosen the knob (6) and then turn the left and right thread take-up
spring guided (10) to adjust the tension.
3. Tighten the screw (11) and then tighten the knob (6).