21
12) Adjusting timing of the auxiliary presser foot, the upper feed foot and the needle
When the needle
①
goes down, the upper feed presser foot
③
should adhere to the feed dog
②
before the needle edge
adheres to the upper part of the feed dog
②
. The upper feed presser foot
③
should continue to adhere to the feed dog
②
even
when the needle
①
edge, going up, and the upper part of the feed dog
②
are detached with each other. If not, loosen the two
up-and-down cam
⑤
clamp screws
④
to adjust right and left the fixed position of the up-and-down cam
⑤
of the presser
foot. (See Figure 32)
[Figure 32]
13) Adjusting stroke of upper feed presser foot
(1) As in Figure 33, the machine is adjusted to have the same amount of upper feed presser foot stroke
④
as the feed dog
stroke
⑤
. (The baseline
⑥
of the shake crank
③
is aligned with the baseline
⑦
of the collar.)
(2) Take the followings steps, if the two base lines are not aligned or if it is necessary to adjust the stroke
④
of the upper feed
presser foot to increase or decrease.
Loosen nut
①
.
Move nut
①
to the back
②
of the horizontal roller to increase the stroke
④
of the upper feed presser foot. Move nut
①
to the front
③
of the shake crank to decrease it.
After adjustment, be sure to fasten nut
①
.
[Figure 33]
①
③
②
④
When the needle goes down
When the needle goes up
⑤
⑦
③
②
①
④
⑤
Lower feed
Upper feed
⑥