getting
Remove
large cap
from
top of machine and loosen
three set screws on feed eccentric, as
shown
in Fiq.
45.
Turn feed eccentric over toward operator to start
and stop feed
motion
sooner, or
away
from
operator
to
start
and stop feed motion
later.
Tighten three set screws and replace cap.
TIMING
THE FEED ROLL
(MACHINES
262-20
AND
262-32)
Feed
roll
on
Machines
262-20
and
262-32
should
be timed so that roller begins its movement as soon
as feed dog starts Its feeding movement.
Remove
needle thread tension regulator bracket
from
machine
and
remove
arm
cover.
Loosen
three
feed
roll
eccentric
screws
shown
in
Fig.
46.
Rotate feed roll eccentric toward operator to
start
movement
of feed roll sooner, or
away
from
operator
to
start
movement of feed roll later as shown in
Fig.
46.
Tighten three feed eccentric screws and replace
arm cover and tension regulator bracket.
jsETTINGTHE
FEED
LIFTING
ECCENTRIC
Position
of feed lifting
eccentric,
Fig.
47,
deter
mines shape of elliptical path taken by feed dog. Thus
eccentric determines distance feed dog will
rise
and
fall, and point where feed dog will
contact
and drop
away
from
material.
Remove
cover
from
rear
of
machine
arm.
Loosen three lifting eccentric screws shown In
Fig.
47.
Turn machine pulley over toward operator until feed
dog begins to move forward.
Rotate lifting eccentric. Fig. 47, until connecting
rod is at
its
lowest point and feed dog begins to
rise.
At this point, center screws on feed eccentric, lift
ing
eccentric, and bevel gear should be in line, as
shown in Fig. 47.
Securely tighten three lifting eccentric screws.
Eliminate
excessive
backlash
in bevel
gears
shown
in Fig. 47,
by
loosening horizontal bevel gear set screw
and
moving
gear toward or away
from
upright bevel
CAUTION:
Bevel gears shown in Fig. 47 have been
lapped together at the factory and must be kept in mesh
atall
times.
SET
SCREWS
LATER
"ic^
••
SOONER
FEED
ECCENTRIC
Fig. 45. Timing
the
Feed Dog
ECCENTRIC
SCREWS
LATER
I
SOONER
Fig. 46. Timing the Feed Rol
SEtl<:lE#
ECCENTRIC
f\
ECCENTRIC
SCREWS
Fig.
47. Setting
the
Feed
Lifting
Eccentric
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