IBM Selectric I/O Reference Manual page 32

2.
Ti It Selector Latches - Form the two stop lugs (Fig. 61)
above the tilt selector latches so that the latches will
reset simultaneously (under the latch bail) just as the
cycle clutch check pawl drops into the notch on the
check ratchet at the rest position (Fig. 62).
Form These Lugs
Up or Down
FIGURE 61. Se lector Latch Stop Lugs
Cycle Shaft Cycle Clutch
Check Ratchet
FIGURE 62. Latches Reset as Check Pawl Drops In
The adjustment can easiiy be checked by hand cycling a
zero-ti It character twice in succession.
As
the cycle
shaft begins to pass its rest positi on, place your finger
lightly against the cycle clutch check pawl whi Ie ob-
serving the selector latches. If the adjustment is correct
you should feel the check pawl drop into the rest position
notch on the check ratchet simuitaneousiy as the two se-
lector latches reset under the latch bai \.
Form the stop lugs by tapping them up or down with a
hammer and screwdriver. The stop lugs should be over-
formed slightly then brought back to the correct positio,
otherwise the "memory" of the metal wi II cause them to
restore toward their original position.
NOTE: It is very important for each selector latch to
receive the same amount of motion from the latch bail,
when operated,. in order to produce the proper amount of
motion to the tilt arm link for a desired selection. If
one of the stop lugs is adjusted too low, its respective
latch wi II reset early under the latch bail producing an
excessive amount of latch clearance for that latch. This
means that this latch when operated will not receive as
much motion from the latch bail as the other latch will
when it is operated. This condition whi ch is undesirable
causes the band width of the system to increase.
3. Tilt Arm Motion - Adju.st the ti It link up or down on the
ti It arm (Fig. 63} to control the ti It ring motion so that
the tilt ring will coarse align the same for a 3-tilt char-
acter as it does for a zero-ti It character.
In order to check this adjustment, it is necessary to
roughly home the tilt ring first. To rough home, half-
cyc Ie a zero-ti It character and adjust the right hand tilt
pulley (Fig. 63) so that the tilt detent will enter slightly
on the rear side of the V-shaped detent notch in the tilt
Loosen Nut To
Make Adjustment
Ad just R. H. Pu II ey
Adjusting Screw
FIGURE 630 Ti It Mechanism
2-17