IBM Selectric I/O Reference Manual page 54

2. Carrier Return and Space Bar Magnet Pivot Plate (Fig.
123) - Position as follows:
a. Vertically - so that the left and right armatures
clear their yokes by .001" to .003".
b. Horizontally - so that the armatures center in their
guide slots.
Adjustments 1 and 2 provide free operation of the armatures
and prevent binding or choke-off.
Armature
Pivot Plate
FIGURE 123. Pivot Plate
3.
Armature Backstop (Fig. 124) - Position (armatures at
rest) so that the armatures clear their yokes by .020" to
.025".
This adjustment provides sufficient motion to unlatch the
interposers and also insures the armatures will be at-
tracted by the magnet coi Is when they are energi zed.
Adj. Screw
~
Backstop
.020" to .025"
~ Y ~Armature
i
='
\,16 ·
f
II
~~ ~I~
Yoke , . '" '"
~
§!
\,i
Ii
li~
FIGURE 124. Armature Backstop
Operati ona I Interposer
Center Line For Interposer
And Armature
FIGURE 125.
Left
to Right
2-39
4.
Magnet Unit Position - Position as foilows:
a. Left to Right - so that the armatures are directly
beneath thei r corresponding interposers (Fig. 125).
b. Front to Rear - so that the armature link holes are
slightly to the rear of the interposer link holes (Fig.
126).
Having the trip link offset insures unlatching of the
interposer since the link pulls downward and also
to the rear.
o~~er ~ ~ _ " " \ - - - - l
Link Offset
Forward
Operational
\ I Link
,
~--I1
. . -
7
Armature
Shock Absorber
FIGURE 126. Front to Rear
5.
Puli Link (Fig. 127) - Adjust the operational puli links
so that a .002" to .010" clearance exists between the
interposer latch bracket and the interposer latch at the
point of relatching.
NOTE: Test this ad justment by manually attracting the
armature and turning the operational shaft so that the in-
terposer is be ing restored toward the front.
.002" to .010"
Clearance
Operational Armature
Monua Ily Attracted
FIGURE 127. Check, Trip Link
With al
i
parts at rest (Fig. 128)
be
sure a clearance exists
between the pu
1\
link and the armature.
The pull link must be approximately 1/2 turn too long to
insure that the armature is moving prior to picking upthe
load of the interposer. A trip link adjusted too short can
cause an intermittent operation or complete failure to re-
lease.