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1 ) Lean the machine head backward.
2) Turn the hand wheel by hand and stop when the feed dog rises to the maxinrum height.
Loosen the feed
Vertically move the feed bar (in the direction indicated by arrow in the figure) to adjust it to - a dequate
height.
After the adjustment, tighten the feed bar setscrew.
When the timing belt (toothed belt) was removed for its
replacement, for example, the relationship between rotating hook
motion and take-up lever motion should be adjusted as follows:
1 ) Turn the balance wheel and stop when the take-up lever is
lifted to its upper dead point.
2) Lean the machine head backward and make sure the
arrow (timing mark) put on the timing belt is in line with the black
line on the boss of lower shaft bearing.
If the timing mark is not in line with the black line,
remove the timing belt and install it again to adjust
Set feed length to
Lean the machine head backward.
Loosen the feed lifting rock shaft crank set Screws A
and B
Set the needle at the lowest position.
Adjust the distance between presser rod and Vibration
prevention rod to
and temporarily tighten the feed lifting
rock shaft crank set screws A and B
6) Check that the right feed lifting rockshaft crank is connected
with the link at right angle, as shown in Figure.
If the connection is not at
right angle, remove the back cover,
loosen screw C and move the right
link to connect the right feed lifting
rockshaft with the link at right angle.
8) After the completion of
adjustment, fully tighten the screws A.
B andC
At this time make certain that
needle can enter the feed dog needle
hole at the cent er of the hole.
Adjustme�t procedure (Fig,15)
3)
l; > ar
4)
5)
The feed dog height is factory-adjusted to 1.2mm
11. Relationship between rotating hook motion and take-up lever motion (Fig.16)
3)
12. Relationship between needle motion and feed dog
motion (Fig.17.18.19)
1 )
2)
3)
4)
5)
8mm
7)
setscrew.
on the feed setting dial
"O"
8mm
-5-
A
- . ' ; --·
-·· ,..__ ::--,
"
.
J j .G�
, : , (_ i
--t'I!
Timing
F 11d Rlting rock
lh1ft cr111k (middle)
.. E.· - .·::· : " �� , : · .·:
, · 0 1- � ·
. .... .
-
••
.....,-
•
B
(i _ � �_i:; z ,;2· - J
(J.
•
Needle rod
FHd !Ing roik
thlff tll!lk (rllt\l)
V lbraUon
prevenUon
rod
18
·
·-.
.
�
--- ��
:·- - i
bell
sprocket
Feed
lifting rack
.i
•nk(righl)
ftcr
�
.
-
-
Link
\
•.
· - ... 1
--
·. I'
..
17
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