*
In
case
of
the needle feed, normally, adjust the timing so that the needle tip aligns with the top surface
of
throat plate in the descending direction
of
the needle when the top surface
of
feed dog aligns with the top
surface
of
throat plate in the ascending direction
of
the feed dog.
Howeverm,in case
of
the machine for heavy-weight materials, adjust the needle tip to approximately 4 mm
from the top surface
of
throat plate.
9) After completion
of
adjusting the feed timing, securely tighten two setscrews
(j])
in the low
er
sprocket.
I 0) After the feed timing adjustment, check again the slip between the needle hole
of
feed dog and the needl
e.
*
If
there is a slip between them, loosen thefeed rocker base arm and readjust the longitudinal position
of
the feed dog.
I
I)
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e ffi
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11)
Loosen setscrews ® in the thread trimmer cam and adjust the thread trimmer cam again at the timing when
marker
d
ot®
on the pulley cover aligns with colorless marker
dot®on
the handwhee
l.
12) Install the hook and the bobbin case positioning finger.
13) Install the face plate.
14)
Finally, check that the throat plate does not come
in
contact with the feed dog, and the feed dog does not
come in contact with the needle when the sca
le
of
feed dial is set to the maximum.
- 36 -
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