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9.
Detent Cam Follower Bracket - Position the detent cam
follower bracket which is mounted to the left side of the
carrier by two screws to satisfy the following conditions:
c.
Front to rear for a clearance of .015" between the
print sleeve and the end of the pin on the cam fol-
lower (Fig. 54A).
Cam Follower Pin
Bracket
FIGURE 54A.
Detent Cam Follower Bracket
b.
Verticaiiy so that the bottom surface of the pin on
the cam follower lines up with the scribe line #1 on
the Hooverometer when the Hooverometer is placed
against the print sleeve as shown in Figure 54B.
This bracket is set at the factory with a dial indicator and
should not require readjustment unless it becomes loose.
Detent Cam Follower Bracket
FIGURE 54B.
Detent Cam Follower Bracket
NOTE:
The position of the bracket directly affects the tim..;.
ing relationship between the detent cam and the print cam.
An improperly adjusted bracket may cause the detents to be-
gin to wi thdraw before the typehead pri nts
T
or the typehead
to print before the detents have fully seated. If this occurs
it wi i I generally show up as poor vertical alignment because
the ti it detent aiways seats after and withdraws ahead of the
rotate detent.
2-15
10. Detent Mechanism (Machines prior to gearless ti It) -
The detent mechanism must be adjusted to satisfy the
following conditions:
a.
Position the ribbon feed and detent cam left or
right on the print sleeve so that the inside ri-b of
the cam wi I
i
be in line with the left hand edge of
the ribbon feed cam follower (Fig. 55).
Ribbon Feed and Detent Cam
Edges Even
FI GURE 55.
Ribbon Feed Cam
b.
Adjust the detent actuating lever support front or
rear (under its locking screw) so that the rotate
detent wi \I c I ear the teeth on the type head ski rt by
.025 to .035" when the eycle shaft is at rest (Fig.
56). This clearance should be observed when the
typehead is manually tilted to a two tilt position
since the two tilt position provides the rotate detent
with the least amount of motion.
FIGURE 56.
Skirt Clearance
Moving the actuating "ever support to the rear wi II
increase skirt clearance.
c.
With the detent cam follower on the low dwell of
the detent cam (detents fu
\I
y seated) rotate the
actuating lever support until .00111 clearance is
felt between the detent actuating lever and the de-
tent cam follower roller. Rotating the support
clockwise wi II increase the clearance.
NOTE:
The adjustments of the detent mechanism directly
affect each other and must be adjusted alternately to obtain
the correct clearances.
The.OOl
li
clearance ad justed into the system between
the detent actuati ng lever and the detent cam follower
insures that the tilt detent will fully seat in the detent
notch of the tilt ring. Too much clearance would allow
the detents to enter their notches too early and withdraw
too late. This could cause an intermittent erroneous
character to print
T
parts breakage
T
or
ro~ier
droppage in
wear compensator.
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