KANSAI SPECIAL PX302-4W Instruction - User Manual

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INSTRUCTION

Industrial

Sewing

Machines

First published : July 1997

Second edition : October 2000

No. 000079

PX302-4W
PX302-5W

INTRODUCTION

Thank you for your purchasing Kansai Special's PX Series.
Read and study this instruction manual carefully before beginning any of the
procedures and save it for later use.

1. This instruction manual describes adjustments and maintenance procedures on this

machine.

2. Before starting the machine, check to make sure the pulley cover, safety cover, etc.

are secured.

3. Before adjusting, cleaning, threading the machine or replacing the needle, be sure

to turn off the power.

4. Never start the machine with no oil in the reservoir.

5. Refer to the parts list as well as this instruction manual before performing

preventive maintenance.

6. The contents described in this instruction manual are subject to change without

notice.

CONTENTS

1. NEEDLES & THREADING THE MACHINE

1-1 Needles

････････････････････････････････････････････････････････

1-2 Replacing the needle

････････････････････････････････････････････

1-3 To thread the machine

･･････････････････････････････････････････

2. MACHINE SPEED

2-1 Machine speed & direction in which the machine pulley runs

･･･････

2-2 Motor & belt

････････････････････････････････････････････････････

3. LUBRICATION

3-1 Oil

･････････････････････････････････････････････････････････････

3-2 To fill the machine with oil

･･････････････････････････････････････

3-3 Replacing the oil and the filter element

･･･････････････････････････

4. SEWING MACHINE INSTALLATION

4-1 Cutting the machine table

･･･････････････････････････････････････

4-2 To install the machine

･･･････････････････････････････････････････

5. TIMING OF THE LOOPER TO THE NEEDLE

5-1 Needle height

･･････････････････････････････････････････････････

5-2 Needle drop and needle side stroke

･･･････････････････････････････

5-3 To install the looper

･････････････････････････････････････････････

5-4 Eccentric for adjusting the looper left to right

･････････････････････

5-5 Position of the looper rocker

･････････････････････････････････････

5-6 Looper left-to-right movement

･･･････････････････････････････････

5-7 Looper/needle front-to-back relationship

･･････････････････････････

5-8 Looper setting distance

･･････････････････････････････････････････

5-9 Adjusting the looper back spring

･････････････････････････････････

6. ADJUSTING THE NEEDLE GUARD

･････････････････････････

7. ADJUSTING THE FEED DOG & STITCH LENGTH

7-1 Feed dog height

･････････････････････････････････････････････････

7-2 Stitch length

･･････････････････････････････････････････････････

7-3 Differential feed ratio

･･････････････････････････････････････････

8. ADJUSTING THE PRESSER FOOT

8-1 Presser foot pressure

･･･････････････････････････････････････････

8-2 Position of the presser foot and foot lift

･･････････････････････････

9. ADJUSTING THE STITCH FORMATION

9-1 Adjusting the looper thread eyelets

･･････････････････････････････

9-2 Position of the looper thread take-up

････････････････････････････

9-3 Adjusting the needle thread guard

･･････････････････････････････

10. CLEANING THE MACHINE

･････････････････････････････････

【

】

NEEDLES & THREADING THE MACHINE

1111----1 Needles

1 Needles

UO163 of Schmetz or Organ
Select the proper needle for the fabric and thread.
< Comparison table of needle sizes >

Schmetz

UY163GAS Nm65 Nm70 Nm75 Nm80 Nm90

Organ UO163

#10

#11

#12

#14

1111----2 Replacing the needle

2 Replacing the needle

When replacing the needle, check the needle carefully
to see that the scarf is turned to the rear of the
machine (see the illustration).

1111----3 To thread the machine

3 To thread the machine

Thread the machine correctly by referring to the illustration below. Incorrect
threading may cause skip stitching, thread breakage and/or uneven stitch formation.

< Note >

When replacing the needle, be sure to turn off the

machine. A clutch motor continues running for a while

after the machine is turned off. Therefore keep on

pressing the pedal until the machine stops.

，

B ... Needle threads

，

D ... Looper threads

【

】

MACHINE SPEED

2222----1 Machine speed & direction in which the machine pulley runs

1 Machine speed & direction in which the machine pulley runs

Maximum speed : 3,500 rpm
Standard speed : 3,000 rpm

To extend machine life, run the machine
approximately 15~20% below the maximum speed
for the first 200 hours of operation (approx. 1
month). Then run the machine at the standard
speed.
The machine pulley turns counterclockwise as
seen from the end of the machine pulley (see the
illustration).

2222----2 Motor & belt

2 Motor & belt

Motor : 3-phase, 2-pole, 400W clutch motor
Belt

: M type V belt

Select the proper motor pulley according to the
machine speed (refer to the motor pulley outer
diameter on the table below). Adjust the position
of the motor by pressing the finger onto the middle
of the belt so that 1~2cm deflection can be
achieved (see the illustration).

< Motor pulley selection table >

Machine speed (SPM)

Motor pulley

outer diameter

(mm)

50Hz 60Hz

60 2500

2950

70 2900

3450

80 3300

(3900)

90 (3700)

(4400)

【

】

LUBRICATION

3333----1 Oil

1 Oil

Use Kansai Special’s genuine oil
(Part No. 28-611)

3333----2 To fill the machine with oil

2 To fill the machine with oil

Remove oil plug A. Fill the machine with oil until
the oil level is at the top line (see H in the
illustration) on oil gauge C.
After the first lubrication, add oil so that the oil
level will be between H and L.
After filling the machine with oil, tighten plug A
and run the machine to check the oil is splashing
from oil pipe outlet B.

3333----3 Replacing the oil and the filter element

3 Replacing the oil and the filter element

To extend machine life, be sure to replace the oil after the first 250 hours of operation.
To replace the oil, follow the procedures below.

1. Remove the V belt from the motor pulley and then remove the machine from the

table.

2. Remove screw D and then drain the oil.

Be careful not to stain V belt with the oil.

3. After draining the oil, be sure to tighten screw D.
4. Fill the machine with oil by referring to 3-2 shown above.

If filter element E is contaminated, proper oiling may not be performed.
Clean the filter element every six months. If just a little or no oil flows out from the
nozzle with the proper amount of oil in the machine, check the filter element.
To clean the filter element, remove oil reservoir.

【

】

SEWING MACHINE INSTALLATION

4444----1 Cutting the machine table

1 Cutting the machine table

4444----2

2 To install the machine

To install the machine

Install the brackets on the underside of the table board (see the illustration below).
Fit the rubber cushions onto the brackets.
Mount the machine head on the rubber cushions correctly.

【

】

TIMING OF THE LOOPER TO THE NEEDLE

5555----1

1 Needle height

Needle height

When the needle bar is at the top of its stroke, there
should be a distance of approximately 10mm from
the top surface of the needle plate to the point of
the needle. Adjustment is made by loosening
screws A.

< Note >

After the above adjustment is made, check to make

sure each needle drops correctly into the center of

each needle drop hole.

＜

M odel

odel

：

302

302 ----4W, 302

4W, 302

4W, 302 ----5W

＞

5555----2

2 Needle drop and needle side stroke

Needle drop and needle side stroke

The needle side stroke on this machine is 5.55mm (302-4W) and 7.4mm (302-5W).
To increase the stroke, loosen screw B and move it up in the slot.    To decrease the stroke,
loosen screw B and move it down in the slot.    The point of the needle should be centered
left to right between fingers of the needle plate when the needle drops to the needle plate.
Adjustment is made by loosening screw C.  The needle side stroke movement should
start when the point of the needle moves up from the top surface of the needle plate.
The needle side stroke movement should stop when the point of the needle reaches the top
surface of the needle plate.    This timing adjustment is made by worm gear D.    To adjust
the position of the needle drop, loosen screws A and turn the needle bar as required.

5555----3333 To install the looper

To install the looper

To set the angle and height of the looper, insert the looper fully into looper holder A and
tighten screw B.

< Note >

Position of the needle drop 1, 2, 3, 4, 5 from

the left side, 5 is the extreme right end. 5,

6, 7, 8, 1 from the right side

< Note >

Position of the needle drop 1, 2, 3, 4 from

the left side, 4 is the extreme right end.

4, 5, 6, 1 from the right side

＜

M odel

odel

：

302

302 ----4W

＞

＜

M odel

odel

：

333302

02 ----5W

＞

＜

M odel

odel

：

302

302 ----4W

＞

＜

M odel

odel

：

302

302 ----5W

＞

5555----4 Eccentric for adjusting the looper left to right

4 Eccentric for adjusting the looper left to right

To adjust the position of the eccentric, loosen screws D.
Align the screw which comes second in the turning
direction of the eccentric with the mark on the shaft.
Then tighten screws D temporarily. Then make a
fine adjustment so that the looper shaft can reach the
extreme right end of its travel while the needle is at
the bottom of its stroke with position 4. After this
adjustment, tighten the screws securely. For
PX302-5W, adjust each looper shaft to come the same
position while the needle is at the bottom of its stroke with position 3 and position 7.

5555----5 Position of the looper rocker

5 Position of the looper rocker

The setting distances of the looper with the needle at
position 4 and position 1 should be equal (5.5mm) (For
PX302-5W, the needle at position 1 and position 5) (see
5-2). To achieve this adjustment, loosen screw A to
loosen the collar. Loosen screws B and C.
Then adjust looper rocker D and lever E.

■

Example

If the setting distance with the needle at position 1 is 5mm and the setting distance with
the needle at position 4 is 6mm, move looper rocker D approximately 1mm to right.
After the adjustment is made, tighten screws B and C securely. Then tighten screw A
with the collar fitted onto looper rocker D.

＜

M odel

odel

：

302

302 ----4W

＞

＜

M odel

odel

：

302

302 ----5W

＞

5555----6 Looper left

6 Looper left

6 Looper left----to

to----right movement

right movement

This adjustment should be made when the needle is
at position 1 (see 5-2). When the point of the
looper, moving to the left, has reached the left side
of the needle, it should be 1mm above the top of the
needle's eye. When the point of the looper, moving
to the right, has reached the left side of the needle,
it should be 0.2mm above the top of the needle's
eye.
The looper moves 0.8mm faster than the needle (see
the illustration on the right).
For PX302-5W when the needle is at position 2.

■

Adjustment is made by loosening three screws F.
After the adjustment, tighten these three screws
equally.

5555----7 Looper/needle front

7 Looper/needle front

7 Looper/needle front----to

to----back relationship

back relationship

Adjust when the needle is at position 3 or 5 (see
5-2).
When the point of the looper is at the center of the
needle, there should be a clearance of 0mm between
the needle and the looper.
Adjustment is made by loosening screw A.

5555----8 Looper setting distance

8 Looper setting distance

Check the looper setting distance by referring to the table below.
If the looper setting distance is not correct, perform 5-4, 5-5 procedure again.

Needle position

Setting distance

(mm)

1, 4

5.5

2, 6

4.7

3, 5

5.8

＜

M odel

odel

：

302

302 ----4W

＞

＜

M odel

odel

：

302

302 ----5W

＞

Needle position

Setting distance

(mm)

1, 5

5.5

2, 8

4.2

3, 7

4.8

4, 6

5555----9 Adjusting the looper back spring

9 Adjusting the looper back spring

It is the best that the surface of the spring touches the
looper closely within the range of B.
Check to see if the surface of the spring touches the
looper closely at least on points C within the range of
B.
Spun thread #60 should be removed from the spring at
approximately 80~100g of tension.

【

】

ADJUSTING THE NEEDLE GUARD

This adjustment should be made when the needle is at
position 4 (see 5-2). When the point of the looper,
moving to the left, has reached the right side of the
needle, line A on the needle guard should be
0.3~0.5mm above the point of the needle (see the
illustration on the right). Then the needle must
slightly touch the needle guard. Adjustment is made
by loosening screw B.

【

】

ADJUSTING THE FEED DOG & STITCH LENGTH

7777----1 Feed dog height

1 Feed dog height

When the feed dog is at the top of its stroke, the feed
dog teeth should be 0.8~1.2mm above the top surface
of the needle plate. Adjustment is made by loosening
screws A and B.

7777----2 Stitch length

2 Stitch length

Loosen bolt A with a 9.5mm T-wrench.
Then turn screw B as required.
To decrease the stitch length, turn it clockwise.
To increase the stitch length, turn it
counterclockwise (see the illustration on the right).

7777----3 Differential feed ratio

3 Differential feed ratio

Remove rubber plug C. Loosen nut D.
To increase the differential feed ratio, move up the
nut. To decrease the differential feed ratio, move
down the nut.

【

】

ADJUSTING THE PRESSER FOOT

8888----1 Presser foot pressure

1 Presser foot pressure

The presser foot pressure should be as light as
possible, yet be sufficient to feed the fabric and
produce uniform stitches. To increase the presser
foot pressure, turn the adjusting knob clockwise
(see the illustration on the right).

8888----2 Position of the presser foot and foot lift

2 Position of the presser foot and foot lift

The presser foot should not touch the needle.
Adjustment is made by loosening screw A and then
moving the presser foot to the right or left.

■

Foot lift

Fit the collar onto the bushing with the presser foot
9mm above the top surface of the needle plate.
Then tighten screw B.

【

】

ADJUSTING THE STITCH FORMATION

9999----1 Adjusting the looper thread eyelets

1 Adjusting the looper thread eyelets

Align the eyes on the looper thread eyelets A with
the center line of the shaft. Adjust looper thread
eyelets A according to sewing conditions such as the
fabric or thread to be used by loosening screws B.
To increase the amount of the thread to be supplied,
move the eyelets backward. To decrease the
amount of the thread to be supplied, move the
eyelets frontward. Thread guide C should be
6~7mm above the guide plate. Adjustment is
made by loosening screw D.

9999----2 Position of the looper thread take

2 Position of the looper thread take

2 Position of the looper thread take----up

When the bottom of the needle's eye has reached the
top surface of the needle plate while the needle is
descending, the looper thread taken up by looper
thread take-up E should be removed from the looper
thread take-up at point F. Adjustment is made by
screw G.

9999----3 Adjusting the needle thread guard

3 Adjusting the needle thread guard

With the needle bar at the bottom of its stroke, the
centers of eyes on needle bar thread eyelet A should be
level with the top surface of needle thread guard B.
Adjustment is made by screw C.
To tighten the needle thread, move up needle bar
thread eyelet A. To loosen the needle thread, move
down needle bar thread eyelet A.

【

】

CLEANING THE MACHINE

At the end of each day, remove the presser
foot and the needle plate and then clean the
slots of the needle plate and the area around
the feed dogs.