KANSAI SPECIAL DX Series User manual

INSTRUCTION
DX/UTCMANUAL
Industrial Sewing Machines
DX9902-3U
DX9900-4U
First published : November 1997
Second edition : January 1999
No. 980101

INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
Thank you for your purchasing Kansai Special's DX/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 DX 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
4. ADJUSTING THE THREAD TRIMMER
4-1 Home position of the knives
(at the extreme right end of their stroke) ･････････････････････････ 2
4-2 Upper knife at the extreme left end of its stroke ･･････････････････ 2
4-3 Position of each lower knife ･････････････････････････････････････ 2
4-4 Position of the points of the lower knives ･････････････････････････ 2
4-5 Relationship between the lower knives and the needles ･･･････････ 3
4-6 Relationship between the upper and lower knives ････････････････ 3
4-7 Overlap of the upper and lower knives ･･･････････････････････････ 3
4-8 Adjusting the leaf springs ･･･････････････････････････････････････ 4
4-9 Relationship between lower knives, needle threads and looper threads ･4
5. ADJUSTING THE THREAD RELEASER
5-1 Thread releaser lever ･･･････････････････････････････････････････ 5
5-2 Thread releaser plate ･･･････････････････････････････････････････ 5
5-3 Thread releaser hook ･･･････････････････････････････････････････ 5
6. SAFETY DETECTOR
･･････････････････････････････････････････ 5
7. ADJUSTING THE SPEED CONTROLLER AND AIR PRESSURE
･･ 6
8. ADJUSTING THE PRESSER FOOT LIFT
･･･････････････････ 6
9. ADJUSTING THE AIR BLOWER
･････････････････････････････ 7
10. CONNECTING AIR LINES AND CORDS FOR PNEUMATIC
DEVICES
10-1 DX004U ･･･････････････････････････････････････････････････････ 8
10-2 DX2-3U ･･･････････････････････････････････････････････････････ 8
10-3 DX2-3U/LK ････････････････････････････････････････････････････ 9

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 >
Remove the connector for the thread trimmer cylinder.
Make sure the knife is retracted all the way.
< Note >
Do not use this thread trimmer with no fabric under the presser foot.

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 varies according to the gauge. Refer to the table below.
Adjustment is made by loosening adjusting collars A and B.
Gauge Stroke
4.8-10-10-10 39.2mm
5.0-13-13-13 41.6mm
9.5-9.5-9.5 37.1mm
8.5-8.5-8.5 37.1mm
6.4-6.4-6.4 37.1mm
【4】ADJUSTING THE THREAD TRIMMER
4
44
4-
--
-1
11
1 Home position of the knives (at the extreme right end of their stroke)
Home position of the knives (at the extreme right end of their stroke)Home position of the knives (at the extreme right end of their stroke)
Home position of the knives (at the extreme right end of their stroke)
The home position of each knife varies according
to the gauge.
Adjust distance A by referring to the illustration
and the table below.
Then fasten collar B (see 3-1).
Gauge Distance A
4.8-10-10-10 46.6mm
5.0-13-13-13 45.6mm
9.5-9.5-9.5 47.1mm
8.5-8.5-8.5 46.1mm
6.4-6.4-6.4 43.9mm
4
44
4-
--
-2 Upper knife at the extreme left end of its stroke
2 Upper knife at the extreme left end of its stroke2 Upper knife at the extreme left end of its stroke
2 Upper knife at the extreme left end of its stroke
Lower knife carrier A and upper knife carrier B
move to the left simultaneously.
Upper knife carrier B stops when reaching
positioning stopper C.
4
44
4-
--
-3 Position of each lower knife
3 Position of each lower knife3 Position of each lower knife
3 Position of each lower knife
The lower knives should be parallel with each
other. Adjustment is made by loosening screws
D. Each distance between the points of the
lower knives should be 6.5mm (see 4-6).
4
44
4-
--
-4 Position of the points of the lower knives
4 Position of the points of the lower knives4 Position of the points of the lower knives
4 Position of the points of the lower knives
When the loopers are at the extreme left end of their travel, move lower knives E to the
left and then make sure the points of lower knives E are 0.7mm above the blades of the
loopers.
< Note >
When operating the thread trimmer by hand, bring the needle to the top of its stroke.