-7-
1 5 . S e t t i n g t h e s t i t c h l e n g t h a n d c o n t r o l l i n g t h e r e v e r s e s e w i n g ( F i g
1 6 . T h r e a d t a k e - u p o i l i n g ( F i g . 1 4 )
1 7 . A d j u s t i n g t h e p r e s s u r e o f p r e s s e r f o o t ( F i g . 1 5 )
Stitch length can be set by turning stitch length
regulating dial (A). The stitch length is longer when
turning stitch length regulation dial (A) counter clock-
wise. And the stitch length is shorter when turning
dial (A) clockwise. The figures on the stitch length
regulation dial plane (B) indicate the stitch length.
Reverse sewing can be obtained when feed re-
verse lever (C) is depressed and forward sewing can
be restored automatically when feed reverse lever (
is released.
C)
Thread take-up area adopts woolen thread oiling.
After long timi of use, function lost, so replace with
a new one.
Open the face plate, remvoe the pressure screw,
lock nut and presser bar.
Remove Hinge (A) and lever (B).
Draw out Oil Wick (C).
Loosen the wick fix screw on thearm top , and
take out Set Plate (D).
Replate with a new one.
Installing is a reverse sequence.
Pressure on presser foot is to be adjusted in
accordance with materials to be sewn. Loosen lock
nut (A) . If heavy materials to be sewn, turn pressure
regulating thumb screw clockwise as shown Fig.20
(a) to increase the pressure. While light materials
to be sewn, turn the pressure regulating thumb screw
counter clockwise as shown in Fig.20 (b) to decrease
the pressure on presser foot, then tighten lock nut
(A).
The sewing materials must be feed normaly with
proper pressure of presser foot and the pressure
should be decreased as possibly.
13
A
B
C
A
B
C
D
14
a
b
A
A
15