KANSAI SPECIAL DX Series Manuale utente

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

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】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.

【3】ADJUSTING THE THREAD TRIMMER AIR CYLINDER

-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

-1

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

-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.

-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 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.

-5 Relationship between the lower knives and the needles

5 Relationship between the lower knives and the needles5 Relationship between the lower knives and the needles

5 Relationship between the lower knives and the needles

■

On DX9902-3U/UTC

When lower knife E is at the extreme left end of its travel,

adjust distance (a) from needle thread cutting edge F to

the center of the left needle by referring to the table

below.

Adjust distance (a) by moving lower knife drive lever L to

the left or right and then fasten collar A.

■

On DX9900-4U/UTC

Adjust distance (b) from the thread cutting edge to the

center of the needle by following the procedure stated

above.

Distance

Gauge a b

4.8-10-10-10 4.0mm

5.0-13-13-13 3.8mm

9.5-9.5-9.5 6mm

8.5-8.5-8.5 6mm

6.4-6.4-6.4 6mm

-6 Relationship between the upper and lower knives

6 Relationship between the upper and lower knives6 Relationship between the upper and lower knives

6 Relationship between the upper and lower knives

Check to make sure positions G on lower knives E are

aligned with positions I on upper knife H.

Each distance between the points of the lower knives

should be 6.5mm.

-7 Overlap of the upper and lower knives

7 Overlap of the upper and lower knives7 Overlap of the upper and lower knives

7 Overlap of the upper and lower knives

Loosen screws J. Then adjust each looper thread cutting

edge Y by referring to the cutting edge of upper knife H as

shown in the illustration below (see 4-6).

-8 Adjusting the leaf springs

8 Adjusting the leaf springs8 Adjusting the leaf springs

8 Adjusting the leaf springs

Loosen screws D and remove lower knives E.

The left-to-right position of leaf springs K varies

according the gauge. Adjust this position by

referring to the illustration and the table below.

Align positions L on leaf springs K with positions I

on upper knife H. Tighten screws M.

After this adjustment has been made, replace lower

knives E (see 4-7).

Gauge Distance A

4.8-10-10-10 3.4mm

5.0-13-13-13 4.1mm

9.5-9.5-9.5 3.3mm

8.5-8.5-8.5 3.0mm

6.4-6.4-6.4 3.0mm

-9 Relationship between lower knives, needle threads and looper threads

9 Relationship between lower knives, needle threads and looper threads9 Relationship between lower knives, needle threads and looper threads

9 Relationship between lower knives, needle threads and looper threads

After all the adjustments have been completed, confirm the following to thread and start

the machine.

■

Lower knife E should enter the needle thread loop(s).

Looper thread cutting edge Y should travel in front of the loop thread.

■

When lower knife E returns home, the needle and looper threads are hooked by their

cutting edges F and Y and pulled to the right. Then they are trimmed by the upper

knife.

【5】ADJUSTING THE THREAD RELEASER

-1 Thread releaser lever

1 Thread releaser lever1 Thread releaser lever

1 Thread releaser lever

When thread releaser cylinder H gets activated, the

thread tension disks should open as soon as possible.

Adjustment is made by positioning thread releaser

lever I. After the adjustment tighten screw J (located

behind the arm) for the thread releaser lever.

-2 Thread releaser plate

2 Thread releaser plate2 Thread releaser plate

2 Thread releaser plate

Adjust the position of thread releaser plate G so that

the tension disks will open as soon as possible.

To make this adjustment, install thread releaser bar A

to thread releaser bar connection plate F with screw E.

The top end of thread releaser bar A should protrude

50mm from the top surface of thread releaser bar guide

B. There should be a clearance of 4mm between E

ring K and thread releaser bar guide B.

-3 Thread releaser hook

3 Thread releaser hook3 Thread releaser hook

3 Thread releaser hook

The needle threads should not protrude long from the

back side of the fabric at the start of sewing.

Loosen screw C and adjust the position of thread

releaser hook D. To decrease the amount of the

threads to be supplied, raise the thread releaser hook.

To increase the amount of the threads to be supplied, lower the thread releaser hook.

Note that the stitches are not formed at the start of sewing if the amount is too little.

【6】SAFETY DETECTOR

■

The safety detector is included so that the machine will

not start running until the thread trimmer cuts the

threads and returns home safely.

Switch A must be kept pressed (ON) during sewing

(with the thread trimmer completely returned home).

Adjustment is made by loosening screws B and E and

moving brackets C and D.

【7】ADJUSTING THE SPEED CONTROLLER AND AIR PRESSURE

■

Speed controller F controls the speed when the thread

trimming knife carriers protrude.

Speed controller G controls the speed when the thread

trimming knife carriers retract. If the screw for F is too

loosened, the carriers will protrude too fast and then the

position of the lower knives will become unstable, causing

cutting error. If the screw for G is too loosened, the

carriers will retract too fast and then the looper threads

may not be held properly. The speed controllers are

factory-set (see the illustration in [6] ).

【8】ADJUSTING THE PRESSER FOOT LIFT

■

The foot lift should be 7mm above the top surface of the

needle plate. To make this 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.

■

When the air cylinder on the pneumatic presser foot lift

gets actuated, the presser foot lift should be 7mm above

the top surface of the needle plate.

To make this adjustment, position stopper E so that lever

G cannot be lowered. After stopper E has been

positioned, secure stopper E with nut F.

< Note >

Set the regulator at 4~5kgs/cm2. To decrease the pressure,

turn the adjusting knob clockwise. Too fast speed will give a

shock to the knife carriers. Then the threads will be cut

before they are cut by the knives or the threads will not be

held properly. It may cause trouble.

【9】ADJUSTING THE AIR BLOWER

■

When the needles are at the top of their stroke, set air

blower C so that air blower outlet A is 1~2mm below

the center of the left needle's eye.

Adjustment is made by loosening screws B.

Adjust the amount of air with speed controller D.

The amount should be as little as possible.

Turning the adjusting screw clockwise decreases the

amount. Turning the adjusting screw

counterclockwise increases the amount. The air must

blow through behind the needles. If the air blows

through in front of the needles, it may cause the needle

threads to be removed from the needles.

< Note >

The air blowing time is factory-set at 1.5 sec's.

Therefore remove the fabric from the machine as soon as

the threads are cut and the presser foot is raised.

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