KANSAI SPECIAL WX8803/UTC User manual

INSTRUCTION
INSTRUCTIONINSTRUCTION
INSTRUCTION
WX,LX/UTC MANUAL
Industrial
IndustrialIndustrial
Industrial Sewing
SewingSewing
Sewing Machines
MachinesMachines
Machines
First published : August 1997
Fourth edition
: August 2000
No. 000056
WX8803/UTC
LX5801/UTC

INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
Thank you for your purchasing Kansai Special's WX/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 WX 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 movable knife holder left and right
･････････････････････････････････････････ 4
5-5 Adjusting the movable knife front to back ･･･ 4
5-6 Adjusting the movable knife up and down ･･･ 5
5-7 Relationship between the movable knife, needle
thread and looper thread ･････････････････ 5
5-8 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 Looper thread take-up ････････････････････ 7
6-5 Thread releaser plate ･････････････････････ 7
6-6 Thread releaser hook ･････････････････････ 7
7. SAFETY DETECTOR ･････････････････････ 7
8. ADJUSTING THE SPEED CONTROLLER
AND AIR PRESSURE
8-1 Adjusting the speed controller ･････････････ 8
8-2 Air pressure ･････････････････････････････ 8
9. ADJUSTING THE NEEDLE THREAD WIPER
･････････････････････････････････････････････ 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 stable 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
･･･････････････････････････････････････････ 13
13. WIRING AND PIPING FOR ELECTRIC DEVICES
･･･････････････････････････････････････････ 13

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. Adjustment is made
by loosening collar B and screw A. There
should be a clearance of 15mm between rubber
cushion F and the rear end of the cylinder.
Position joint shaft E so that the distance from
left end of the cylinder mounting bracket D to
the center of joint shaft E is approximately
55.3mm when the cylinder retracts.
Adjustment is made by loosening nut C. In these conditions, there should be a clearance
of approximately 19mm between thread releaser block H and cylinder mounting bracket
D.
3
33
3-
--
-2 Air cylinder return spring
2 Air cylinder return spring2 Air cylinder return spring
2 Air cylinder return spring
There should be a clearance of approximately 28mm
between ring G and air cylinder mounting bracket D
when the plunger of the air cylinder protrudes.
【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. Adjustment is made
by removing rubber cover F and loosening
screw A.
There should be a clearance of 15mm between
rubber cushion B and the rear end of the
solenoid. Position joint shaft E so that the
distance from the left end of solenoid
mounting bracket D to the center of joint shaft
E is approximately 55.3mm when the solenoid
has retracts. Adjustment is made by loosening nut C. In these conditions, there should
be a clearance of approximately 19mm between thread releaser block J and solenoid
mounting bracket D.
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
There should be a clearance of 42mm between solenoid
return spring collar H and solenoid mounting bracket
D when the plunger of the solenoid protrudes.
Adjustment is made by loosening screw G on 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
1mm when movable knife is at the extreme right.
So that between the point of blade (a 2) for cutting
needle thread and corner (b 1) of stationary knife B
to be 0.4mm.
The adjustment is made by loosening screw C.
Note that the looper thread clamp spring is
simultaneously loosened.
5
55
5-
--
-2 Adjusting the looper thread clamp spring
2 Adjusting the looper thread clamp spring2 Adjusting the looper thread clamp spring
2 Adjusting 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 parallel to the part (f
1) of movable knife pressure spring.
And adjust it will protrude approximately 4.8mm
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 mov
4 Adjusting the mov4 Adjusting the mov
4 Adjusting the movable knife holder left and right
able knife holder left and rightable knife holder left and right
able knife holder left and right
With movable knife A at the extreme left end of its
travel, there should be a distance of 23mm from the
center of the needle bar to the point of movable knife A.
■When the movable knife is at the extreme right end of
its travel, Align the part (a2) of movable knife (A)
parallel with the part (r1) of knife holder plate (R).
■Easy test for checking the correct travel of the movable
knife is to agree the mark (T) of driving lever (M) to the
mark (t) of knife holder plate (R) at the extreme right
end or left end of its travel. The left side is a standard
position for the mark (N) of guide lever ring (R).
■Adjustment is made by loosening the screw (B) of connecting lever (E) and moving guide
bar (D) on right and left. Use lever (M) for final slight adjustment. Normal setting
aligns the right end (e) of connecting lever (E) level with the step position (d) of guide bar
(D).
5
55
5-
--
-5 Adjusting the
5 Adjusting the5 Adjusting the
5 Adjusting the
movable knife
movable knifemovable knife
movable knife
front to back
front to backfront to back
front to back
To adjust the movable knife front to back, alignment
line (S) of movable knife over the looper with the point
of movable knife 13mm moved to the left from the right
end of looper. To adjust, when loosening screw U and
turning lever ring P clockwise, the movable knife point moves forward and turning it
counterclockwise, the point moves backward.

5
5
55
5-
--
-6 Adjusting the movable knife up and down
6 Adjusting the movable knife up and down6 Adjusting the movable knife up and down
6 Adjusting the movable knife up and down
There should be a clearance of 0.2mm between movable knife and the top surface of
looper.
The adjustment is made by loosening nut X and moving stationary knife holder (W).
After the above adjustment, make sure the movable and stationary knife holders move
smoothly. Do not adjust this clearance by changing the height of the looper.
Otherwise it
may cause skip
stitching.
5
55
5-
--
-7 Relationship b
7 Relationship b7 Relationship b
7 Relationship between the movable knife, needle thread and looper thread
etween the movable knife, needle thread and looper threadetween the movable knife, needle thread and looper thread
etween 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-
--
-8 Looper thread clamp spring pressure
8 Looper thread clamp spring pressure8 Looper thread clamp spring pressure
8 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 or the
solenoid rod at the left end of its travel (the air
cylinder is not operating), there should be a
clearance of 4.0mm between the thread trimmer air
cylinder bracket D and thread releaser block C.
After this adjustment, tighten screw B.
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 A onto guide
screw E with a clearance between A 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
When thread releaser block C operates, thread
tension disk K should open as fast as possible.
To make this adjustment, position thread releaser
lever F and then tighten screw H on thread releaser
connection lever G at the rear end of the arm.

7
6
66
6-
--
-4 Looper thread take
4 Looper thread take4 Looper thread take
4 Looper thread take-
--
-up
upup
up
This machine is equipped with looper thread
take-up L. Thread looper thread take-up L with a
looper thread.
6
66
6-
--
-5 Thread releaser plate
5 Thread releaser plate5 Thread releaser plate
5 Thread releaser plate
The thread tension disks should open as fast as
possible. To make this adjustment, loosen screw B
on thread releaser plate adjusting collar A and then
adjust the position of thread releaser plate C.
With the upper end of thread releaser bar D 39mm
protruded from the top surface of thread releaser
bar guide E, secure thread releaser bar D on thread
releaser connection plate F with screw G.
In the above condition, the length of spring H should
be approximately 4mm.
6
66
6-
--
-6 Thread releaser hook
6 Thread releaser hook6 Thread releaser hook
6 Thread releaser hook
The needle thread should not be shown long on the
back of the fabric. Adjustment is made by
loosening screw I and positioning thread releaser
hook J.
To decrease the amount of thread to be supplied,
raise the thread releaser hook. To increase the
amount of thread to be supplied, lower the thread
releaser hook.
Do not decrease the amount too much. Otherwise stitches at the start of sewing will not
be formed.
【7】SAFETY DETECTOR
■
The safety detector is included so that the machine
will not run if the thread trimmer does not return
home safely after the operation. Switch A on the
safety detector must be ON (switch A is pressed)
during sewing (the thread trimmer is completely at
home). Adjustment is made by loosening screws B
and E and moving brackets C and D as required.

8
【8】ADJUSTING THE SPEED CONTROLLER AND AIR PRESSURE
8
88
8-
--
-1 Adjusting the speed controller
1 Adjusting the speed controller1 Adjusting the speed controller
1 Adjusting the speed controller
Speed controller F controls the speed when the thread
trimming knife holder projects.
Speed controller G controls the speed when the thread
trimming knife holder retracts.
If the speed is too fast, the knife holder will be greatly
shocked. This will cause trouble such as a thread is
trimmed before it is caught in the knives or it is not
clamped correctly by the thread clamp.
If screw F is too loosened, the holder will protrude too
fast and then the position of the movable knife will
become unstable, causing cutting error.
If screw G is too loosened, the holder will retract too
fast and then a looper thread may not be held properly.
8
88
8-
--
-2 Air pressure
2 Air pressure2 Air pressure
2 Air pressure


Set the regulator at 4~5kg/cm2.
An air pressure of more than 5.0kg will cause trouble.
【9】ADJUSTING THE NEEDLE THREAD WIPER
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.

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 on
crank lever C and 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 below stopper E. Then secure
stopper E with nut F.
■
Electric presser foot lift
When plunger H moves in the 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
below stopper E. 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 stable knife
1 Relationship between the position of the movable knife and the stable knife1 Relationship between the position of the movable knife and the stable knife
1 Relationship between the position of the movable knife and the stable knife
When the movable knife fully retracts, align hook point E of the movable knife with point
F of the stationary knife. To make this adjustment,
loosen screws A for stoppers B on 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. Make a fine height adjustment
on the movable knife by referring 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 so that
it is parallel with the stationary knife.
The top cover thread is clamped and held by spring
G 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 retract
approximately 2mm from end F of the stationary
knife. Loosen screws I and adjust spring H so that
it 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 screws H on
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.
There should be a clearance of approximately 1mm
between hook point D of movable knife C and the top
cover thread. Adjustment is made by loosening
screws J on movable knife mounting base I.
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 stopper B (see the
illustration on the previous page).
Then tighten screws F when bracket E is in the lowest
position.
< Note >
The following adjustments should be made manually with the fabric under the
presser foot when the needle is at the top of its stroke.
< Note >
Turn off the power first and then adjust by hand with
the fabric under the presser foot.

12
11
1111
11-
--
-7 Adjusting the solenoid return spring
7 Adjusting the solenoid return spring7 Adjusting the solenoid return spring
7 Adjusting the 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 the end of drive lever B and the step of 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 t
8 Adjusting the t8 Adjusting the t
8 Adjusting the top cover thread releaser hook
op cover thread releaser hookop cover thread releaser hook
op cover thread releaser hook
To decrease the amount of the thread to be supplied,
move up thread releaser hook G.
To increase the amount of the thread to be supplied,
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 the top cover thread trimmer from vibrating, fit the end of screw H onto the
plate and then tighten nut I.

13
【12】WIRING AND PIPING FOR PNEUMATIC DEVICES
■
Connect air lines and cords by referring to the illustration below and the parts list.
【13】WIRING AND PIPING FOR ELECTRIC DEVICES
■
Connect air lines and cords by referring to the illustration below and the parts list.