Print Mechanism (New Style) - IBM Selectric Manual

9.
FIGURE
78.
Carrier Buffers
(723
&
725)
Print Cam Follower
a. Print Cam Follower Stud - Adjust the pivot stud left
or right so that the rubber roller on the follower is
centered on the surface of the restoring cam. The
stud is held in place in the carrier by a set screw
that is accessible from the bottom of the machine.
b. Restoring Cam Follower Eccentric - With the print
cam follower at the high point of the cam and the
platen removed, hold the type head toward the rear
until it is restricted by the anvil and striker. The
rubber roller should just touch the restoring cam
{Fig.
79}.
Adjust the eccentric, keeping the high
point forward, to satisfy the condition.
NOTE: If the roller is too close to the restoring
cam, it may bind against the cam during print shaft
rotation. If too much clearance exists, the type-
head may not be restored as quickly as it should
and bl urred characters may resu It.
10. Even Printing - Position the yoke under its mounting
screws so that the density of the left and right sides of a
printed character will be uniform.
CAUTION: Thisadjustment affects the tilt ring homing
adjustment, the typehead homing adjustment, and the
detent cam and actuating lever adjustments {skirt clear-
ance}. Be sure to check these after changing the posi-
tion of the yoke.
1.
6.
31
Stri ker Aga inst Anvi I
FIGURE
79.
Restoring Cam Follower Eccentric
Adjustment
PRINT MECHANISM - NEW STYLE
Adjustmentsonethrough five remain exactly the same as
they appear on the old style print mechanism. After
completing these five adjustments, begin here with ad-
justment number six.
Carrier Support (long carriage machines) - Adjust both
endsofthesupportvertically to maintain .001" to .004"
clearance with the bottom of the ribbon feed bracket
along the entire length of the writing line (Fig.
80).
'Carrier Support
~
(Anvil)
I
FIGURE 80. Carrier Support
.OOJ
II
To
i
t
(Long Carriage Machines)
The support is secured to the machine power frame by
two binding screws at each end. Elongated holes in the
machine power frame enables the support to be adjusted
verti cally. This ad justment serves the same purpose as
the carrier buffers on the early level machines.