IBM Selectric Reference Manual

2.
3.
b. With the armatures energized, position the arma-
ture stops so that the armatures clear the magnet
yoke by .003" to .005" (Fig. 270).
Red Shift Armature (Energized)
Yoke
FIGURE 270. Armature Stops
Black Shift Magnet - With the black shift magnet arma-
ture energized and the red shift magnet armature de-
energized, position the black shift magnet for a clear-
ance of .010" between the black and red shift arma-
tures (Fig. 271).
Adj. Screws
Armature
(De -e ne rg i zed)
Black Shift Magnet Red Shift Magnet
FIGURE 271. Magnet Positioning
NOTE: With the red shift armature energized and the
black shift armature de-energized, the black shift arm-
ature must overthrow the red shift armature by .003" to
.006" (Fig. 272).
Adj. Screws
Red Sh ift Magnet
~~ .. ~
Red Shift A~mature (Energized)
Black Shift Armature (De-energized)
FIGURE 272. Black Shift Armature Overthrow
Magnet Adjustments (1 Magnet, Fig. 273) - With the
red shift magnet armature energized, position the hinge
plate and armature stop so that the armature clears the
yoke (both inner and outer poles) by .003" to .005".
.003" .003"
to to
.005" .005
11
Armature
I
Mtg. Screw
.--- Armature Stop
Hinge Plate
Mtg. Screw
4.
5.
2-90
Yoke
FIGURE 273. Magnet Adjustments (1 Magnet)
Pivot Arm (Fig. 274) - With the manual ribbon lift lever
in the black position, form the pivot arm extension (up
or down) so that the latch does not drag when moved
from
the latched to the un latched posi ti on.
NOTE: Position the pivot arm bracket so that the
highest and lowest characters print equidistant from the
top and bottom of the red portion of a black and red
ribbon.
Form To Prevent
Latch Drag
Cam Follower Latch
FIGURE 274. Pivot Arm
Right Hand Pulley (Fig. 275 & 276) - With the red shift
armature energized, position the right hand pulley pivot
to obtain .002" to .005" clearance between the stud
and follower latch slot.
NOTE: The pulley nut must be loosened before ad-
justing the pivot screw.
Pulley
Pivot
Loosen This Nut Before
Attempting Adjustment
Adjustable Lock
Pivot
Screw
FI GURE 275. Right Hand Pulley
.002 II To .005"
Follower Latch Stud
Cam Follower
Latch
FIGURE 276. Cam Follower Latch

IBM Selectric Specifications

General

Type	Electric typewriter
Introduced	1961
Keyboard Layout	QWERTY
Carriage Return	Electric
Manufacturer	IBM
Printing Technology	Typeball (golf ball)
Power Source	AC Power
Power Supply	120V AC