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1/8" minimum
Tt a
Spring
\ Yoke
Retention
Hook
Le
\ Mee J
Figure 4-16, Armature Adjustment
Guide Comb
Figure 4-17. Interposer Unlatching Clearance
4.6.4 Punch Interposer Magnet Assembly Adjustment
The position of the magnet unit affects three interrelated
adjustments: unlatching clearances, relatching of inter-
posersin their armature notches, and knockoffbail.
1. Install magnet unit with reasonable unlatching clearance
as a preliminary step. Do not overtighten screws because
magnetunit will be readjusted in step 2. Restore all but
four interposers across the unit. While manually rotating
index clockwise, position magnet unit so that the
unlatched interposers in their downward motionstart to
enter their armature notches at 92 degrees and so thatall
are in the notches at 100 degrees. Space interposer
4-10
(4/69)
Guide Comb and Bumper
movement varies from that of the other interposers, but
the interposer should be in its armature notch at 100
degrees (Figure 4-18).
. The heel of the latching end of the interposers has been
rounded to avoid contact with the opposite side of the
notch in the armatures. Shift the magnet unit toward or
away from the interposers to obtain 0.040-inch to
0.050-inch clearance (Figure 4-17).
The preceding adjustment should result in minimum
unlatching clearance of 0.008 inch for each interposer,
except the space interposer, which can have a minimum
unlatching clearance of 0.005-inch (Figure 4-19).
. Adjust eccentric screw on knockoff bail (Figure 4-18) to
cause bail to contact an attracted armature at both ends
of unit between 13 degrees and 20 degrees. If the
eccentricity is insufficient, inspect cam follower for
wear. It may be necessary to pivot entire magnet unit
around armature latching point to bring bail closer to
armatures.
. Momentarily attract each armature electrically. The
spring should cause the armature to fall away from the
core. If the armatures hang up whenthe pick circuit is
broken, they should be replaced; the residual magnetism
causes excessive wear on the knockoffbail.
LOO
Eccentric
Screw
Figure 4-18. Interposer Relatching Adjustment
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