Tabulation - IBM 01 Maintenance Manual

MODEL B4 CUSTOMER ENGINEERING
to the latch plate until the latch clears the inter-
mediate grouping lever by one, or slightly less than
one unit (Figure 18). (
7a. GROUPING LATCH ADJUSTING PLATE
(Floating Selection) (Figure 18). Adjust by centering
the grouping latch adjusting screw in the slot of
the grouping latch adjusting plate. To check this
adjustment: (
1. Hold the carriage so that the pawls will re-
main free of pressure by the rack teeth.
2. Latch up grouping by moving the automatic
grouping lever by hand until the latch will drop into I
the notch of the intermediate grouping lever. This .
will allow the pawls to remain in the rack while
grouped.
3. Hold the grouping latch in the notch of
the intermediate grouping lever.
4. With a spring hook pull the 1 or 5 escapement
pawl to the left until the spring lug is felt to strike
the bail of the latch releasing lever. The distance
the pawl moves should be one unit or slightly less
and can be gaged by the movement of the escape-
ment pawl tail across an interposer. It may be neces-
sary to slightly readjust the grouping latch adjust-
ing screw to satisfy this condition.
TABULATION
Adjustments
1. TAB LEVER PIVOT STUD. Adjust for a slight
amount of end play to prevent binding of the tab (
lever (Figure 19).
2. CAM CLEARANCE. Refer to "Spacebar, adjust-
ment 1, Model Bl".
3. THE CAM RELEASE LINK should be placed in (
the front hole of the keylever. Adjust the link to trip
the cam when the keylever has completed two-thirds
to three-fourths of its downward travel (Figure 20).
18