Print Mechanism (Old Style) - IBM Selectric Manual

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PRI NT MECHAN ISM - OLD STYLE
Copy Control Lever - With the copy control lever de-
tented in the forward position, the high points of the
eccentrics should be vertical (Fig. 70). Adjust the copy
control lever on the shaft to satisfy this condition.
This adjustment provides the most effective operation of
the eccentrics in moving the platen forward and back.
NOTE: The stop ears on the copy control detent spring
should be formed to provide positive detenting in the
extreme front and rear positions of the lever.
CAUTION: The adjustment of the copy control lever,
while important as a preliminary setting, should not re-
quire adjustment unless it becomes loose or parts replace-
ment is necessary. Any change in the adjustment will
affect the front to rear position of the platen requiring
that other adjustments be altered to compensate.
Eccentric Retaining Plates - For maximum efficiency of
the copy control eccentrics, adjust the plate on each
side of the machine so that no front to rear play exists
between the eccentrics and the retaining plates (Fig. 70).
Be sure that no binds exist.
Copy Control Lever
Copy Control
Ecc.
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Platen Latches - Ad just the platen latch eccentrics with
the high part down so that the platen is held firmly in
position vertically and horizontally. The latches should
latch and unlatch freely with the feed rolls released.
Platen Position - To properly adjust the print mechanism,
the correct position ofthe platen must
be
established first
and then the print adjustments made relative to the platen
position. This involves both a height adjustment and a
front to rear position. Because of the method used in
measuring these posiHons, it is necessary to consider them
together and ad just them alternately unti I both are correct.
#4 Scribe Line
Hooverometer
Handle
Must Be Vertica·'
FIGURE 71. Platen Height Adjustment
Bracket Ecc.
FIGURE 70. Copy Control Mechanism