KANSAI SPECIAL UF Series Bedienungsanleitung

INSTRUCTION

Industrial

Sewing

Machines

WX8803/UF

RX9803/UF

MZ1103/UF

First published : May 1999

No. 990038

INTRODUCTION

Thank you for your purchasing Kansai Special's UF Series.

Read and study this instruction manual carefully before beginning any of the

procedures and save it for later use.

1. This instruction manual describes adjustments and maintenance procedures for the

Top-feed mechanism.

2. Before starting the machine, check to make sure the pulley cover, safety cover, etc.

are secured.

3. Before adjusting, cleaning, threading the machine or replacing the needle, be sure to

turn off the power.

4. Never start the machine with no oil in the reservoir.

5. Refer to the parts list of each model as well as this instruction manual before

performing preventive maintenance.

6. The contents described in this instruction manual are subject to change without

notice.

Indication of serial number

Zip code

Model

0 5 0 0 0 0 1

Serial number

The date of manufacture

CONTENTS

1. Adjusting the amount of front-to-back movement

on the top feed dog

1-1 To adjust amount of front-to-back movement (stitch length)

on the top feed dog in relation to the main feed dog ·················1

1-2 To adjust the clearance between the top feed dog

and the main feed dog ·························································2

1-3 To adjust the top feed dog pressure ·······································2

2. Adjusting the top feed dog front to back

································3

3. Adjust the top feed dog stroke

··············································3

4. Adjusting the standard position of the top feed dog

···············4

5. Adjusting the top feed dog timing

·········································6

【1】

ADJUSTING THE AMOUNT OF FRONT-TO-BACK MOVEMENT ON THE TOP FEED DOG

1-1 To adjust amount of front-to-back movement (stitch length)

on the top feed dog in relation to the main feed dog

The main and top feed dogs separately move on this machine.

Therefore, if the movement amount of the main feed dog is changed, that of the top feed

dog should be changed. The movement ratio of the top feed dog in relation to the main

feed dog is one to one (standard). The symbols on scale ①serve as the reference for the

amount of front-to-back movement on the top feed dog. S indicates 2mm. M indicates

4.5mm. L indicates 7mm. C (CENTER): The top feed dog moves front to back in the

divided-in-half mode. B(BACK): The top feed dog moves front to back in the rear-fixed

mode. F(FRONT): The top feed dog moves front to back in the front-fixed mode.

■In the case of C or B

Adjust the amount of front-to-back movement with symbols ②on scale ①and mark ⑤

on adjusting guide ④.

■In the case of F

Adjust the amount of front-to-back movement with symbols ③on scale ①and mark ⑥

on adjusting guide ④. To increase the amount, turn knob ⑦clockwise.

To decrease the amount, turn knob ⑦counterclockwise. Adjust the amount while

checking the stitch formation.

■To adjust the amount of front-to-back movement during

sewing by means of a pedal and chain, knee switch, etc.

(optional)

In the case of a pedal and chain:

Hook a chain over the end of lever ⑨(see the illustration).

To set the amount, move adjusting guide ④to the right

by lowering lever ⑨(the amount is increased). Loosen

screws ⑧. Position the stopper while checking marks ⑤

and ⑥on adjusting guide ④.

Then tighten screws ⑧. The amount can be increased up

to mark L.

1-2 To adjust the clearance between the top feed dog and the main feed dog

To feed the fabric accurately according to sewing

applications, types and/or thickness of the fabric, the

top feed dog height adjustment should be made.

With top feed dog ①at the bottom of its stroke and

main feed dog ②at the top of its stroke, a piece of

the fabric should be able to be placed between the

top feed dog and the main feed dog when plain

stitching is performed. Adjustment is made by

loosening set screw ③on the top feed dog.

1-3 To adjust the top feed dog pressure

The pressure should be as light as possible, yet be

sufficient to obtain the proper stitch formation and

feed the fabric (see the illustration).

To increase the pressure, loosen lock nut ①and

turn adjustment screw ②clockwise.

To decrease the pressure, loosen lock nut ①and

turn adjustment screw ②counterclockwise.

The standard pressure can be achieved with a

distance of 23mm from the top surface of lock nut ①

to that of adjustment screw ②.

【2】ADJUSTING THE TOP FEED DOG FRONT TO BACK

When top feed dog ①is at the extreme rear end of

its travel with a maximum front-to-back movement

amount of 7mm (=L), there should be a clearance of

1mm between top feed dog ①and the end of each

slot on the presser foot. Adjustment is made by

tightening set screw ③on front-to-back lever ②.

【3】ADJUST THE TOP FEED DOG STROKE

To obtain a stroke of 4.7mm, remove the cover, loosen nut ①, move rod pin ②up or down

and then align the center of rod pin ②with alignment mark ③on the center of the

up-and-down shaft driven lever. To decrease the stroke, move up rod pin ②

(min.:3.5mm). To increase the stroke, move down rod pin ②(max.:6.0mm).

【4】ADJUSTING THE STANDARD POSITION OF THE TOP FEED DOG

On this machine, the standard position of the top feed dog can be changed so that the

fabric is accurately fed according to sewing applications, types and/or thickness of the

fabric. This feature eliminates plyshifting during sewing.

1. C (CENTER): The top feed dog moves in the

divided-in-half mode.

This machine is factory-set in this mode.

2. B(BACK): The top feed dog moves in the

rear-fixed mode.

3. F(FRONT): The top feed dog moves in the

front-fixed mode.

■Follow the precautions below before changing the

standard position.

1. Bring the top feed dog to the extreme rear end of

its travel.

2. Do not loosen screw ②on front-to-back

movement adjusting lever ①and screw ③on

the collar.

■The machine is factory-set at C.

The V-shaped groove on outside eccentric ④and inscription C on middle eccentric ⑥are

aligned with mark X.

■To change the standard position, follow the procedures below by referring to the

illustrations as seen from the machine pulley.

A. To change from C (CENTER) to B (BACK)

1). Loosen outside eccentric set screw ⑤first. Align the V-shaped groove on

outside eccentric ④with mark X by turning outside eccentric ④and middle

eccentric ⑥counterclockwise.

2). Secure outside eccentric ④by tightening outside eccentric set screw ⑤.

Align inscription B on middle eccentric ⑥with mark Y by turning only middle

eccentric ⑥90°clockwise. Then tighten middle eccentric set screw ⑦.

B. To change from C (CENTER) to F (FRONT)

1). Loosen outside eccentric set screw ⑤first.

Align the V-shaped groove on outside eccentric ④with mark Y by turning

outside eccentric ④and middle eccentric ⑥counterclockwise.

2). Secure outside eccentric ④by tightening outside eccentric set screw ⑤.

Align inscription F on middle eccentric ⑥with mark Y by turning only middle

eccentric ⑥90°counterclockwise. Then tighten middle eccentric set screw ⑦.

< Note >

Do not tighten excessively outside eccentric set screw ⑤and middle eccentric set

screw ⑦(torque them to 15kg･cm).

C. To change from B (BACK) to C (CENTER)

Perform reverse procedures of No.1 (see below).

1). With outside eccentric ④secured, turn only middle eccentric ⑥90 °

counterclockwise.

2). Align the V-shaped groove on outside eccentric ④with mark X by turning

outside eccentric ④and middle eccentric ⑥clockwise.

D. To change from F (FRONT) to C (CENTER)

Perform reverse procedures of No.B (see below).

1). With outside eccentric ④secured, turn only middle eccentric ⑥90°clockwise.

2). Align the V-shaped groove on outside eccentric ④with mark X by turning

outside eccentric ④and middle eccentric ⑥clockwise.

E. To change from B (BACK) to F (FRONT)

Change B (BACK) to C (CENTER) first (follow procedure No.C).

Then change C (CENTER) to F (FRONT) (follow procedure No.B).

F. To change from F (FRONT) to B (BACK)

Change F (FRONT) to C (CENTER) first (follow procedure No.D).

Then change C (CENTER) to B (BACK) (follow procedure No.A).

< Note >

When turning the middle or outside eccentric during

Nos.1 to 6 procedures, be sure to keep the top feed dog

from contact with the slots on the presser

foot.

【5】ADJUSTING THE TOP FEED DOG TIMING

■To adjust the up-and-down timing

Align hole ②on the top feed up-and-down eccentric

with V-shaped groove ①on the upper shaft

(standard).

< Note >

The top feed dog path, height and front-to-back

position are changed by changing the position of these

holes and V-shaped grooves. Be careful.

■To adjust the front-to-back timing

Align hole ④on the top feed front-to-back eccentric

with V-shaped groove ③on the upper shaft

(standard).

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