TO
TIME THE FEED
DRIVING
ECCENTRIC
AV
AU
The
stitch
length
of the
machine
con
be
changed
by
means
of the feed
driving
eccentric as instructedunder
"TO
SET THE LENGTH
OF
THE STITCH".
The
eccentric "AW",
Fig.
23 is
held
in
the feed dri
ving
flange
"AX",
Fig.
23
in
a
guide
and
adjusted
by
means
of the
adjusting
screws
"AY",
Fig.
23
which
are
secured
by
the
lock
screws
"AZ",
Fig.
23
to
prevent
shift
ing.
The
linear
movement
of
the
eccentric
is
accomplish
ed by
turning
the
adjusting
disc
"BA",
Fig.
23.
The
ad
justing
disc spring and the adjusting disc spring retainer
"BB",
Fig.
23 prevent the adjusting disc from
moving
out of position while the machine is
In
operation.
AW
AX BA
Figure 23
The
timing
of the feed driving eccentric in relation to
the
needle
movement for normal sewing conditions
should
be
made
as
follows:
Check the seating of the feed driving eccentric posi
tion
screw
in
the
splined
groove
of
the
bed
shaft.
The
position
screw
is
the
first
screw
to appear
when
turn
ing the machine pulley in the normal direction of rota
tion.
Loosen
the
set
screws
of
the
bed
shaft
connection
belt pulley and turn the machine pulley until the timing
mark "AU", Fig. 24 of the rotary take-up is in line with
the upper timing mark "AV", Fig. 24 on the face plate.
While maintaining this position turn the bed shaft
with the feed driving eccentric until the timing mark on
the notched side of the eccentric
"AW",
Fig. 25 aligns
with the timing mark on the feed driving link "BC",
Fig. 25. Then securely retlghten the set screws of the
iDeltpulley.
Figure 24
Figure 25
Caution:
Whenever
the
timing
of the feed
driv'^ii^
mechanism has
been
changed, check the hook for p
per timing as Instructed under "TO
TIME
THE
HOOK .
14
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