IBM Selectric I/O Reference Manual page 29

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CAUTION:
Vertical play in the upper ball socket will
affect vertical alignment and impression because the
type head wi II not maintain a definite position.
Also, care must be taken to insure that the entire rotat,
system is free from binds. A bind in the upper ball sock-
et can resu I tin poor hori zonta I a I i gnment if the rotate
detent fai Is to fu II y seat in the detent notch before pri nt
occurs. An excessive bind can cause unwanted roller
droppage in the wear compensator during a negative se-
lection.
Binds in the system (carrier area) can be
checked by manually operating the shift arm in and out.
5.
Ti It Detent - Adiust the guide and pivot screw so that
the tilt detent will operate freely with no side play
(Fig.
50).
Ti It Detent
FIGURE
50.
Ti It Detent Adjustment
As Little Clearance
AS~
Possible, No Binds
~
EARLY
STYLE
~.
As Little Clearance as
Possible, No Binds
Adjust Guides to Obtain
Proper Clearance
FIGURE 51. Rotate Detent Guides
Excessive si de play in the ti It detent wi II cause poor
vertical alignment. A bind in the tilt detent will nffect
both the vertical and horizontal alignment because
jt
wi II retard or restri ct the seati ng of the ti It detent whi ch,
in tu rn, wi II retard or restri ct the seati ng of the rotate
detent.
6.
Rotate Detent - Adjust the front and rear guides so that
the rotate detent wi II operate freely with no side play
(Fig.
51).
Excessive play in the detent will result in poor horizon-
ta I a lignment because the detent cannot positive Iy po-
sition the typehead.
7.
Rocker Shaft - Adiust the rocker shaft left or right to
obtain
.0.02"
to
.004"
side play in the rocker (Fig.
52).
2-14
The side play exists between a C-clip around the shaft
at the right of the rocker and a thrust washer against the
carri er casti ng at the left of the rocker. The rocker
shaft is held in place by a set screw at the left end of
the shaft.
Excessive play in the rocker could affect horizontal
alignment by allowing the rocker to shift its position
left to right.
I
FIGURE
52.
I
,I
.002"
to
.004"-1
I
Rocket Shaft Adjustment
8.
Print Sleeve End Play - Adjust the print sleeve end play
to be
.002"
to
.004".
The end play is controlled by the
print cam on the right hand end of the sleeve. The ad-
justment should not be gained with the ribbon lift cam
because its set screw tightens down into a dimple in the
print sleeve fixing the position of the cam (Fig.
53).
End
Play
Adjust
by
Print Cam
I
~
I
FiGURE 53
e
Print Sleeve End Play

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