Carriage Return - IBM 01 Maintenance Manual

REFERENCE MANUAL
MODELS 4 and 5
cam to the tab actuating lever. Adjust the front link so
that the forward edge of the intermediate lever is per-'
pendicular to the front link. Then set the rear link so that
the tab latch just clears the keeper with the cam on its
high point. On models with a single link, adjust the same
as for the rear link. To check, rotate the cam to its high
point; the tab check lever should just clear the front of
the tab rack. In the rest position for all models, there
should be a small amount of clearance, both front and
back, between the tab actuating lever and the tab lever.
THE TAB RACK should be adjusted so that, with the car-
riage resting on the 2 or 6 pawl, the tip of the tab check
lever will be in line with the nearest tab stop.
CARRIAGE TENSION should be checked by holding the
carriage with the tab check lever positioned at the last
stop. Latch the tab and release the carriage. There should
be just enough main spring tension to unlatch the tab.
THE FRICTION GOVERNOR PAWL LINK should be ad-
justed to engage the pawl in the friction ratchet teeth by
the thickness of its own metal. It should safely clear the
ratchet with the tab at rest.
FRICTION GOVERNOR PRESSURE should be adjusted by
means of the two locking nuts on the hub of the main
spring drum until the tab speed is approximately the same
speed as the carriage return and a solid positive action
results. .
THE TAB SET LEVER BRACKET should be adjusted to the
right or left until the set lever can strike the nearest stop
squarely in the center with the carriage resting on the
1 or 5 pawl.
CARRIAGE RETURN
Figure 22 shows the sequence of adjustments for the
carriage return.
1. THE CARRIAGE RETURN CAM STOP should be ad-
justed so that when the cam is released the release lever
will just fall behind the cam lug.
2. THE CAM ELEASE LINK should be adjusted so the key
lever will trip the cam when the key has been depressed
1/2 to 3/4 of its total travel.
3. THE FRONT CLUTCH LEVER LINK should be adjusted
so that, when the clutch operating arm is as far out as
the clutch lever and roller will permit, the cam will be
just touching the cam stop with the clutch unlatched.
4. THE LATCH LINK should be adjusted so that the right-
hand arm of the lower bell crank lies parallel to the rear
rail.
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