Page 1
Industrial
Industrial
IndustrialIndustrial
Sewing
Sewing
SewingSewing
INSTRUCTION
INSTRUCTION
INSTRUCTIONINSTRUCTION
Machines
Machines
MachinesMachines
First published : May 1999
WX8803/UF
RX9803/UF
MZ1103/UF
No. 990038
Page 2
INTRODUCTION
INTRODUCTION
INTRODUCTIONINTRODUCTION
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.
Page 3
CONTENTS
CONTENTS
CONTENTSCONTENTS
1. Adjusting the amount of front-to-back movement
1-1 To adjust amount of front-to-back movement (stitch length)
on the top feed dog in relation to the main feed dog
1-2 To adjust the clearance b etween the top feed dog
and the main feed dog
1-3 To adjust the top feed dog pressure
･･･････････････････････････････････････
･･･････････････････････････
on the top feed dog
････････････
1
2
2
2. Adjusting the top feed dog front to back
3. Adjust the top feed dog stroke
･･･････････････････････････････
･････････････････････
4. Adjusting the standard posi t i on of t he t op f eed dog
5. Adjusting the top feed dog timing
･･･････････････････････････
･･････････
3
3
4
6
Page 4
【1】
ADJUSTING THE AMOUNT OF FRONT-TO-BACK MOVEMENT ON THE TOP FEED DOG
1111----1 To adjust a mo u n t of fro n t
1 To adjust amount of front----to
1 To adjust amount of front1 To adjust amount of front
on the top feed dog in relation to the main feed dog
on the top feed dog in relation to the main feed dog
on the top feed dog in relation to the main feed dog 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 ① serve 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 ② on scale ① and mark ⑤
on adjusting guide ④.
■
In the case of F
Adjust the amount of front-to-back movement with symbols ③ on scale ① and mark ⑥
on adjusting guide ④. To increase the amount, turn knob ⑦ clockwise.
To decrease the amount, turn knob ⑦ counterclockwise. Adjust the amount while
stitch formation.
to----back movement (stitch length)
back movement (stitch length)
toto
back movement (stitch length)back movement (stitch length)
checking the
■
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 guid e ④ to the right
by lowering lever ⑨ (the amount is increased).
Loosen screws ⑧. Position the stopper while checking
marks ⑤ and ⑥ on adjusting guide ④.
Then tighten screws ⑧. The amount can be increased
up to mark L.
1
Page 5
1111----2
2 To adjust the clearance between the top feed dog and the main feed dog
To adjust the clearance between the top feed dog and the main feed dog
2 2
To adjust the clearance between the top feed dog and the main feed dogTo 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 ① at the bottom of its stroke and
main feed dog ② at 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 ③ on the top feed dog.
1111----3
3 To adjust the top feed dog pressure
To adjust the top feed dog pressure
3 3
To adjust the top feed dog pressureTo 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 ① and
turn adjustment screw ② clockwise.
To decrease the pressure, loosen lock nut ① and
turn adjustment screw ② counterclockwise.
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
Page 6
【2】
ADJUSTING THE TOP FEED DOG FRONT TO BACK
When top feed dog ① is 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 ① and the end of each
slot on the presser foot. Adjustment is made by
tightening set screw ③ on 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 ② up or
down and then align the center of rod pin ② with alignment mark ③ on 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).
3
Page 7
【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 ② on front-to-back
movement adjusting lever ① and screw ③ on
the collar.
4
Page 8
■
The machine is factory-set at C.
The V-shaped groove on outside eccentric ④ and inscription C on middle eccentric ⑥
are 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 ⑤ first. Align the V-shaped groove on
outside eccentric ④ with mark X by turning outside eccentric ④ and middle
eccentric ⑥ counterclockwise.
2). Secure outside eccentric ④ by tightening outside eccentric set screw ⑤.
Align inscription B on middle eccentric ⑥ with mark Y by turning onl y middle
eccentric ⑥ 90°clockwise. Then tighten middle eccentric set screw ⑦.
B. To change from C (CENTER) t o F ( FRONT)
1). Loosen outside eccentric set screw ⑤ first.
Align the V-shaped groove on outside eccentric ④ with mark Y by turning
outside eccentric ④ and middle eccentric ⑥ counterclockwise.
2). Secure outside eccentric ④ by tightening outside eccentric set screw ⑤.
Align inscription F on middle eccentric ⑥ with mark Y by turning only middle
eccentric ⑥ 90°counterclockwise. Then tighten middle eccentric set screw ⑦.
< Note >
Do not tighten excessively outside eccentric set screw ⑤ and middle eccentric set
screw ⑦ (torque them to 15kg･ cm).
5
Page 9
C. To change from B (BACK ) to C (CENTER)
Perform reverse procedures of No.1 (see below).
1). With outside eccentric ④ secured, turn only middle eccentric ⑥ 90
counterclockwise.
2). Align the V-shaped groove on outside eccentric ④ with mark X by turning
outside eccentric ④ and middle eccentric ⑥ clockwise.
D. To change from F (FRONT) t o C (CENTER)
Perform reverse procedures of No.B (see below).
1). With outside eccentric ④ secured, turn only middle eccentric ⑥ 90°clockwise.
2). Align the V-shaped groove on outside eccentric ④ with mark X by turning
outside eccentric ④ and middle eccentric ⑥ clockwise.
E. To change from B (BACK) to F (FRONT)
Change B (BACK) to C (CENTER) first (follow proc e dur e No . C).
Then change C (CENTER) to F (FRO NT) (follow procedure No. B) .
F. To change from F (FRONT) to B (BACK)
Change F (FRONT) to C (CENTER) f i rs t ( 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 ② on the top feed up-and-down eccentric
with V-shaped groove ① on the upper shaft
(standard).
■
To adjust the front-to-back timing
Align hole ④ on the top feed front-to-back eccentric
with V-shaped groove ③ on 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.
6
Loading...