ADJUSTMENT
PROCEDURES
The following instructions
apply
to
bot
'h
th~
P*a#
260
flat-bed
and
the Pfaff
360
free-arm sewing machine.
Wherever
variations
in
design necessitate differ-
ent
adjustment procedures, each
procedure
will
be
discussed separately. To
check the settings
of
a machine
or
to reset it
after
it
has
been
stripped
and
reassembled, follow
the
procedures outlined below:
-2mm
f.08'')
Fig.
76
Fig
. n
The Feed Eccentric
Make
sure
the timing marks on the feed eccentric
and
on the arm
shaft
are
in
line. Push the eccentric to the right until there is a
clearance
of
about
5
/6.·,
or
2.0 mm, between it
and
the
rear
bearing
bushing
on
the arm shaft
(Fig.
76).
Tighten the eccentric set screws securely.
The
Upper
Driving Belt Sprocket
The correct position
of
the driving
belt
sprocket on the arm shaft
is
of
eminent
importance for
the
proper
balancing
of
this shaft. Before you adjust the posi-
tion
of
the
sprocket, toke core that the feed eccentric
has
been
set
very accu-
rately,
as
instructed
above.
To position the sprocket on
the
arm shaft correctly,
push it
toward
the feed eccentric
and
make sure
that
its position pin (which
should point
toward
the
balance
wheel)
enters
the
borehole
in
the eccentric
(Fig.
77).
Then tighten both set screws
in
the driving
belt
sprocket securely.
On
all machines fitted with a clip belt, the sprocket position pin should
engage
the small recess S
in
the
collar
of
the feed eccentric. This recess should
be
46
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