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.