15
A
A
a
b
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 pres-
sure regulating thumb screw clockwise as shown
Fig.20 (a) to increase the pressure .While light mate-
rials 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 pressure of presser foot is proper as the
sewing materials can be fed normally.
.
.
17.Adjusting the pressure of presser foot (Fig 15.)
15.Setting the stitch length and controlling the reverse sewing (Fig 13)
13
-7-
Thread take-up section adopts woolen thread
oiling. after long time of use, its function lost, so re-
place with a new one.
Open the face plate, remove the pressure
①
screw, lock nut and presser bar.
Renove Hinge(A) and Lever(B)
②
Draw out Oil Wick(C).
③
Loosen the wick fix screw on the arm top,
④
and take out Set Plate(D).
Replace with a new one.
⑤
Installing is a reverse sequence.
⑥
16.Thread take-up oiling (Fig 14)
14
C
A
B
D
A
B
C
D
Stitch length can be set by turning stitch
length regulating dial(A). The figures on the stitch
length regulation dial plate (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
(C) is released.
.
.
