of
l"he
pattern-forming groove. Add feed across regulator, and screw feed
plate
onto
feed
plate
carrier
bar.
To
prevent
the rollers from becoming
wedged
in the grooves,
again
loosen the set screws in the
bearing
bracket,
and
turn the driving pulley
by hand. This action will cause the rollers to
odopt
the best position in the
grooves automatically.
Knife
Com
Attach bearing bracket for knife
bar
tripping lever
(22239).
Push knife cam
with positioning flange onto worm wheel shaft, pin down, and tighten set
screws securely. Install knife
bar
(22088),
making sure that spotted teeth
of rack and pinion mesh. Mount lifting lever
(22003)
and connect with knife
bar
tripping lever by means of ball joint connection
(22512).
Stop Motion
Attach stop motion lever, brake lever, tripping lever, and locking lever.
Other
Ports
Attach remaining parts while you adjust the machine, or
after
adjustment
has
been
completed.
3. Adjustment
and
Check-Up
To focilitate the use of this manual, all adjustments discussed in the follow
ing chapter,
wherever
feasible, hove been grouped by
assemblies.
Thus,
for instance, all adjustments pertaining to the shuttle
will
be found under
the heading
"Timing
the Shuttle and Setting the Needle Bar at Correct
Height". For best results, it is recommended to perform the adjustment
and check-up of a machine in the sequence given below.
Important
Always
insert a new needle before you adjust a
machine.
Select the needle
size in accordance with the material to be sewn. Unless specified otherwise,
the adjustments discussed below apply to all subclasses. Certain materials,
however, necessitate minor deviations from the standard settings given here.
a.
Timing
the Shuttle and Settingthe Needle Barat CorrectHeight
Insert a new needle,
and
screw on the needle plate. Loosen the set screw
in the needle bar frame, and adjust the latter so that the needle is centered
in the needle hole. (Needle plate inserts are available in various needle hole
sizes).
33
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