KANSAI SPECIAL RX/UTC Series User manual

INSTRUCTION
INSTRUCTIONINSTRUCTION
INSTRUCTION
RX/UTC MANUAL
Industrial
IndustrialIndustrial
Industrial Sewing
SewingSewing
Sewing Machines
MachinesMachines
Machines
First published : September 1991
Eighth edition : July 2001
No. 010086

INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
Thank you for your purchasing Kansai Special's RX/UTC Series.
Read and study this instruction manual carefully before beginning any of
the procedures and save it for later use.
This instruction manual describes adjustments and maintenance
procedures for the thread trimmer.
Refer to the RX Series instruction manual for other information.

CONTENTS
CONTENTSCONTENTS
CONTENTS
1. HOW TO USE THE THREAD TRIMMER
･1
2. INSTALLING THE POSITION DETECTOR
･1
3. ADJUSTING THE THREAD TRIMMER AIR CYLINDER
3-1 Air cylinder stroke ････････････････････････ 2
3-2 Air cylinder return spring ･････････････････ 2
4. ADJUSTING THE THREAD TRIMMER SOLENOID
4-1 Solenoid stroke ･･･････････････････････････ 2
4-2 Adjusting the solenoid return spring ･･･････ 2
5. ADJUSTING THE THREAD TRIMMER
5-1 Position of the movable knife and the stationary
knife
････････････････････････････････････ 3
5-2 Adjusting the looper thread clamp spring ･･･ 3
5-3 Adjusting the movable knife pressure spring
･･ 3
5-4 Adjusting the stationary knife holder stopper
･･ 4
5-5 Adjusting the movable knife holder left and right
･････････････････････････････････････････ 4
5-6 Adjusting the movable knife front to back ･･･ 4
5-7 Adjusting the movable knife up and down ･･･ 5
5-8 Relationship between the movable knife, needle
thread and looper thread ･････････････････ 5
5-9 Looper thread clamp spring pressure ･･･････ 5
6. ADJUSTING THE THREAD RELEASER
6-1 Thread releaser block ･････････････････････ 6
6-2 Thread releaser connection plate ･･･････････ 6
6-3 Thread releaser lever ･････････････････････ 6
6-4 Thread releaser plate ･････････････････････ 7
6-5 Thread releaser hook ･････････････････････ 7
7. SAFETY DETECTOR ････････････････････ 7
8. ADJUSTING THE SPEED CONTROLLER
AND AIR PRESSURE ････････････････････ 8
9. THREAD WIPER ADJUSTMENT ･･･････ 8
10. ADJUSTING THE PRESSER FOOT LIFT
9
11. ADJUSTING THE TOP COVER THREAD TRIMMER
11-1 Relationship between the position of the
movable knife and the stationary knife ･･ 10
11-2 Adjusting the top cover thread clamp spring
･･･････････････････････････････････････ 10
11-3 Adjusting the movable knife pressure spring
･･･････････････････････････････････････ 10
11-4 Adjusting the movable knife left to right ･･ 11
11-5 Adjusting the movable knife front to back 11
11-6 Adjusting the height of the movable knife 11
11-7 Adjusting the solenoid return spring ･････ 12
11-8 Adjusting the top cover thread releaser hook 12
12. WIRING AND PIPING FOR PNEUMATIC DEVICES
12-1 RX9800 ･･･････････････････････････････ 13
12-2 RX9800ALK, PHK ･････････････････････ 13
12-3 RX9800PLK ･･･････････････････････････ 14
13. WIRING AND PIPING FOR ELECTRIC DEVICES
････････････････････････････････････････････ 14

1
【1】HOW TO USE THE THREAD TRIMMER
■
Pressing the pedal with toe (position A) starts the
machine. Releasing the pedal (position B) stops the
needle at the top/bottom of its stroke (adjustable with
the motor).
■
If the needle stops at the bottom of its stroke as adjusted,
pressing the pedal with heel (position C) raises the
needle.
As soon as the needle stops at the top of its stroke by
pressing the pedal with heel, the thread trimmer gets
actuated (if the needle stops at the top of its stroke as
adjusted, the thread trimmer gets actuated by pressing
the pedal with heel).
■
Returning the pedal to position B lowers the presser foot.
■
The presser foot can be raised or lowered freely by releasing the pedal (position B) or
pressing the pedal with heel (position C) until the pedal is placed at position A for the
next sewing operation after the threads are cut.
【2】INSTALLING THE POSITION DETECTOR
■
Install position detector A and tighten screw B
temporarily.
■
Fit positioner bar C onto the guide groove of the position
detector. Then tighten screw D.
■
Turn on the motor.
■
Press the pedal with heel after two to three stitches are
formed by pressing the pedal with toe.
Then the needle stops.
■
Loosen screws B for the position detector.
Turn the machine pulley while checking that the
position of screws B is not shifted. Align mark P on
handwheel E with the alignment mark on the arm.
Then the needle bar is at the top of its stroke.
Tighten screws B to secure the position detector.
■
Check to see if the needle bar stops at the top of its
stroke by pressing and then releasing the pedal.
< Note >
Do not use this thread trimmer with no fabric under the presser foot.
< Note >
Remove the connector for the thread trimmer cylinder.
Make sure the knife is retracted all the way.

2
【3】ADJUSTING THE THREAD TRIMMER AIR CYLINDER
3
33
3-
--
-1 Air cylinder stroke
1 Air cylinder stroke1 Air cylinder stroke
1 Air cylinder stroke
The stroke of the air cylinder should
be approximately 15mm.
To adjust this stroke, loosen collar B
and screw A. Set the clearance
between rubber cushion F and the
rear end of the cylinder at 15mm.
To position shaft E, loosen nut C.
With the cylinder retracted, set the
distance from the left end of cylinder
installation bracket D and the center
of shaft E at approximately 57.3mm.
3
33
3-
--
-2 Air cylinder return spring
2 Air cylinder return spring2 Air cylinder return spring
2 Air cylinder return spring
With the cylinder plunger protruded, there should
be approximately 26mm clearance between ring G
and bracket D.
【4】ADJUSTING THE THREAD TRIMMER SOLENOID
4
44
4-
--
-1 Solenoid stroke
1 Solenoid stroke1 Solenoid stroke
1 Solenoid stroke
The stroke of the solenoid should be
approximately 15mm.
To adjust this stroke, remove rubber
cover F and loosen nut A.
Set the clearance between rubber
cushion B and the rear end of the
solenoid at 15mm. To position shaft
E, loosen nut C. With the solenoid
retracted, set the distance from the
left end of bracket D and the center
of shaft E at approximately 57.3mm.
4
44
4-
--
-2 Adjusting the solenoid return spring
2 Adjusting the solenoid return spring2 Adjusting the solenoid return spring
2 Adjusting the solenoid return spring
With the solenoid plunger protruded, there should
be approximately 42mm clearance between collar
H and bracket D. To make this adjustment,
loosen screw G of solenoid return spring collar H.

3
【5】ADJUSTING THE THREAD TRIMMER
5
55
5-
--
-1 Position of the movable knife and the stationary knife
1 Position of the movable knife and the stationary knife1 Position of the movable knife and the stationary knife
1 Position of the movable knife and the stationary knife
■
Position of the movable knife
Set the (a 1) part of the movable knife A parallel to
the (g 1) part of the stationary holder G.
Set the distance from point of movable knife A and
the center of left screw H at approximately
73.5mm.
■
Relation between the stationary knife and the
movable knife.
Adjust the engagement between blade (a 3) for
trimming looper thread and stationary knife to be
0.5mm when movable knife is at the extreme right.
So that the point of blade (a 2) for cutting needle
thread pass the corner (b 1) of stationary knife B.
The adjustment is made by loosening screw C.
Note that the looper thread clamp spring is
simultaneously loosened.
5
55
5-
--
-2 Ad
2 Ad2 Ad
2 Adjusting the looper thread clamp spring
justing the looper thread clamp springjusting the looper thread clamp spring
justing the looper thread clamp spring
Position of looper thread clamp spring D so that
the part (a 1) of movable knife and the part (d 1) of
looper thread clamp spring are on the same plane.
And adjust it will protrude approximately 2.2mm
from the point of movable knife A when movable
knife is at the extreme right. Adjustment is made
by loosening screw C.
5
55
5-
--
-3 Adjusting the movable knife pressure spring
3 Adjusting the movable knife pressure spring3 Adjusting the movable knife pressure spring
3 Adjusting the movable knife pressure spring
Position of movable knife pressure spring F so that
the part (a 1) of movable knife and the part (f 1) of
movable knife pressure spring are on the same
plane.
And adjust it will protrude approximately 5.2mm
from the point of movable knife A when movable
knife is at the extreme right. Adjustment is made
by loosening screw E.

4
5
55
5-
--
-4 Adjusting the st
4 Adjusting the st4 Adjusting the st
4 Adjusting the stationary knife holder stopper
ationary knife holder stopperationary knife holder stopper
ationary knife holder stopper
The stationary knife holder I slides to the left and
stops by stationary knife holder stopper J.
Never slide the stationary knife holder I to the left
too much because the looper thread clamp spring
touches the looper.
The adjustment is made by loosening screw K and
moving stationary knife stopper left and right.
The standard position, the left end of stationary
knife holder stopper is 1mm right from the left end
of base plate R.
5
55
5-
--
-5 Adjusting the movable knife holder
5 Adjusting the movable knife holder5 Adjusting the movable knife holder
5 Adjusting the movable knife holder left and right
left and rightleft and right
left and right
With movable knife A at the extreme left end of its travel, there should be a distance of
22mm from the center of the needle bar to the point of movable knife A.
To make the above adjustments, remove pin S and make a fine left-to-right adjustment on
movable knife driver lever M by turning screw T.
5
55
5-
--
-6 Adjusting the movable knife front to back
6 Adjusting the movable knife front to back6 Adjusting the movable knife front to back
6 Adjusting the movable knife front to back
To adjust the movable knife front to back, center the point of movable knife over the
looper with the point of movable knife 12mm moved to the left from the right end of
looper.
To adjust, when loosening screw U and turning guide lever ring P clockwise, the movable
knife point moves forward and turning it counterclockwise, the point moves backward.
At the same time, movable knife holder guide N should slightly touch the end of movable
knife
holder.
The
adjustme
nt is
made by
loosening
screw V.
5
55
5-
--
-7
77
7
Adjusting
AdjustingAdjusting
Adjusting
the
thethe
the
movable knife up and down
movable knife up and downmovable knife up and down
movable knife up and down

5
There should be a clearance of 0mm between movable knife and the top surface of looper.
The adjustment is made by loosening screw X and moving stationary knife holder guide.
After the above adjustment, make sure the movable and stationary knife holders move
smoothly.
5
55
5-
--
-8 Relationship between the movable knife, needle thread and looper thread
8 Relationship between the movable knife, needle thread and looper thread8 Relationship between the movable knife, needle thread and looper thread
8 Relationship between the movable knife, needle thread and looper thread
After all the adjustments are made, check the following
before threading to start the machine.
■
Movable knife A should enter needle thread loops B.
Cutting edge C for the looper thread should pass looper
thread D.
■
When the movable knife is returning home, the needle
threads and looper thread are pulled to the right by
cutting edges E and F and cut by the stationary knife.
5
55
5-
--
-9 Looper thread clamp spring pressure
9 Looper thread clamp spring pressure9 Looper thread clamp spring pressure
9 Looper thread clamp spring pressure
The looper thread clamp spring holds the looper thread
after it is cut. To adjust the pressure of thread clamp
spring H, turn adjusting screw G. To increase the
pressure, turn it clockwise. To decrease the pressure,
turn it counterclockwise. The machine is supplied
with a spun thread (#60). The pressure of the thread
clamp spring is factory-set at approximately 90g.
Adjust the pressure for other threads.

6
【6】ADJUSTING THE THREAD RELEASER
6
66
6-
--
-1 Thread releaser block
1 Thread releaser block1 Thread releaser block
1 Thread releaser block
With the thread trimmer air cylinder rod at the left
end (the air cylinder is not operating), set the
clearance between thread trimmer air cylinder
bracket A and thread releaser block B at 13mm.
Then tighten screw C.
6
66
6-
--
-2 Thread releaser connection plate
2 Thread releaser connection plate2 Thread releaser connection plate
2 Thread releaser connection plate
Fit thread releaser connection plate D to guide
screw E. Create a clearance between plate D and
thread releaser connection lever G.
Adjustment is made by loosening screw H.
6
66
6-
--
-3 Thread releaser lever
3 Thread releaser lever3 Thread releaser lever
3 Thread releaser lever
Position thread releaser lever F so that the thread
tension disk can open as fast as possible.
Then tighten screw H for thread releaser connection
lever G at the rear of the arm.

7
6
66
6-
--
-4 Thread releaser plate
4 Thread releaser plate4 Thread releaser plate
4 Thread releaser plate
Install thread releaser bar D to thread releaser bar
connection plate F with screw G.
The top end of thread releaser bar D should
protrude 39mm from the top surface of thread
releaser bar guide E. There should be a clearance
of 4mm between washer H and thread releaser bar
guide E.
6
66
6-
--
-5 Thread releaser hook
5 Thread releaser hook5 Thread releaser hook
5 Thread releaser hook
The needle thread should not protrude long from the
underside of the fabric at the start of sewing.
Loosen screw I and adjust thread releaser hook J.
To decrease the amount of the thread supplied by
the thread take-up, raise the thread releaser hook.
To increase the amount, lower the thread releaser
hook. If the amount is too little, the stitches cannot
be formed at the start of sewing.
【7】SAFETY DETECTOR
■
The safety detector is included so that the machine
will not start until the thread trimmer cuts the
threads and returns home safely.
Switch A of the detector must be pressed (ON)
during sewing (with the thread trimmer completely
returned home). Adjust by loosening screws B and
E and moving brackets C and D.

8
【8】ADJUSTING THE SPEED CONTROLLER AND AIR PRESSURE
■
Speed controller F controls the speed when the thread
trimmer knife holder protrudes. Speed controller G
controls the speed when the thread trimmer knife holder
retracts. If screw F is too loosened, the holder will
protrude too fast and then the position of the movable
knife will be unstable, causing cutting error.
If screw G is too loosened, the holder will retract too fast
and then the looper thread may not be held properly (the
speed controllers are factory-set).
【9】THREAD WIPER ADJUSTMENT
1. Tighten screw E to position lever B horizontally.
There should be a 0 to 0.3mm clearance between
bracket C and stopper ring D.
2. Secure shaft F with screw G.
There should be 1mm clearance between lever B and
secure shaft F.
3. Position thread wiper K with screw H.
The distance between the left end of the thread wiper
and the center of the needle bar should be
approximately 19mm when the thread wiper is all the
way to the left and clearance between the needle
center and point P of the thread wiper should be
approximately 1mm.
4. The distance between the left needle and thread
wiper K should approximately 0.5mm with screw A.
5. Position thread wiper K parallel with flat spring M
with screw L.
< Note >
Set the regulator at 4~5kg/cm2. To decrease the pressure,
turn the adjusting knob clockwise. Too fast speed will give
a shock to the knife holder. Then the threads will be cut
before they are caught by the knife or the threads will not
be held properly. It may cause trouble.

9
【10】ADJUSTING THE PRESSER FOOT LIFT
■
Foot lift on the machine with spreader 6mm above the
top surface of the needle plate
■
Foot lift on the machine without spreader 7mm above
the top surface of the needle plate
To make the above adjustment, loosen screw D for
crank lever C and then set the clearance between slot
A on the presser bar clamp connection plate and screw
B at 0.5~1mm.
■
Pneumatic presser foot lift
When the cylinder gets actuated, the presser foot
should be 6mm or 7mm above the top surface of the
needle plate. Position stopper E so that lever G
cannot be lowered.
Then secure stopper E with nut F.
■
Electric presser foot lift
When plunger H moves in direction of J, the presser
foot should be 6mm or 7mm above the top surface of
the needle plate. Adjust by using chain I.
Position stopper E so that lever G cannot be lowered.
Then secure stopper E with nut F.
Note that there is a little slack on chain I when
plunger H moves in the direction of K.

10
【11】ADJUSTING THE TOP COVER THREAD TRIMMER
11
1111
11-
--
-1 Relationship between the position of the movable knife and the stationary knife
1 Relationship between the position of the movable knife and the stationary knife1 Relationship between the position of the movable knife and the stationary knife
1 Relationship between the position of the movable knife and the stationary knife
When the movable knife retracts all the way, align hook point E of the movable knife with
hook point F of the stationary knife. To make this
adjustment, loosen screws A for stoppers B on the
pneumatic/electric top cover thread trimmer. On the
pneumatic/electric top cover thread trimmer, screws A
should be centered in the slots of stoppers B. There
should be a clearance of approximately 14mm between
cylinder connection block D and end C of the cylinder.
To make a fine height adjustment on the movable knife,
refer to 11-6.
11
1111
11-
--
-2 Adjusting the top cover thread clamp spring
2 Adjusting the top cover thread clamp spring2 Adjusting the top cover thread clamp spring
2 Adjusting the top cover thread clamp spring
Top cover thread clamp spring G should protrude
approximately 3mm from end F of the stationary knife.
Loosen screws I and adjust spring G while checking
spring G is parallel with the stationary knife.
Spring G holds the top cover thread after it is cut.
To adjust the pressure of the spring, turn adjusting
screw J. To increase the pressure, turn it clockwise.
To decrease the pressure, turn it counterclockwise.
11
1111
11-
--
-3 Adjusting the movable knife pressure spring
3 Adjusting the movable knife pressure spring3 Adjusting the movable knife pressure spring
3 Adjusting the movable knife pressure spring
Movable knife pressure spring H should retracts
approximately 2mm from end F of the stationary knife.
Loosen screws I and adjust spring H while checking
spring H is parallel with the stationary knife.
< Note >
Excessive pressure causes needle breakage.

11
11
1111
11-
--
-4 Adjusting the movable knife left to right
4 Adjusting the movable knife left to right4 Adjusting the movable knife left to right
4 Adjusting the movable knife left to right
Movable knife C should pass clearance B between
spreader A and the left needle. Loosen screw H for
bracket G. Adjust movable knife C while checking it
does not touch spreader A or the left needle.
11
1111
11-
--
-5 Adjusting the movable knife front to back
5 Adjusting the movable knife front to back5 Adjusting the movable knife front to back
5 Adjusting the movable knife front to back
The movable knife should hook the top cover thread
when the movable knife returns home.
Loosen screws J on movable knife installation base I.
Set the clearance between hook end D of movable knife
C and the top cover thread at approximately 1mm.
11
1111
11-
--
-6 Adjusting the height of the movable knife
6 Adjusting the height of the movable knife6 Adjusting the height of the movable knife
6 Adjusting the height of the movable knife
When the movable knife is at the bottom of its travel,
hook point X of the movable knife should be aligned
with the top surface of the spreader.
Adjustment is made by moving stoppers B (see the
illustration on the previous page).
Then tighten screws F when bracket E is in the lowest
position.
< Note >
Turn off the motor, position the fabric under the presser
foot and then adjust by hand.

12
11
1111
11-
--
-7 Adjusting the
7 Adjusting the7 Adjusting the
7 Adjusting the solenoid return spring
solenoid return springsolenoid return spring
solenoid return spring
Available for the electric top cover thread trimmer.
Position spring bracket D so that screw E will be centered in the slot of spring bracket D.
Set the clearance between drive lever B and solenoid shaft A at approximately 2mm.
Then tighten screw C for drive lever B. To adjust the returning pressure of the movable
knife, loosen screw E for spring bracket D and move spring bracket D up or down.
To increase the pressure, move up bracket D. To decrease the pressure, move down
bracket D. The pressure of spring F should be as light as possible, yet be sufficient to
return the movable knife home correctly when the solenoid gets actuated.
11
1111
11-
--
-8 Adjusting the top cover thread releaser hook
8 Adjusting the top cover thread releaser hook8 Adjusting the top cover thread releaser hook
8 Adjusting the top cover thread releaser hook
To decrease the amount of the thread supplied by
the thread take-up, move up thread releaser hook G.
To increase the amount of the thread supplied by
the thread take-up, move down thread releaser hook
G.
If the amount is too small, the top cover thread
cannot be held after it is cut.
< Note >
To prevent vibration on the top cover thread trimmer, fit the end of screw H onto the plate
and then tighten nut I.

13
【12】WIRING AND PIPING FOR PNEUMATIC DEVICES
12
1212
12-
--
-1 RX9800
1 RX98001 RX9800
1 RX9800
■
Connect air lines and cords by referring to the illustration below and the parts list.
12
1212
12-
--
-2 RX9800ALK
2 RX9800ALK2 RX9800ALK
2 RX9800ALK，
，，
，PHK
PHKPHK
PHK

14
12
1212
12-
--
-3 RX9800PLK
3 RX9800PLK3 RX9800PLK
3 RX9800PLK
【13】WIRING AND PIPING FOR ELECTRIC DEVICES