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bail contacts all latches at A, Figure 4-53. This should
result in 0.010-inch maximum overtravel of latching
point with gage removed.
2. With magnets deengergized, adjust the two backstop
screws for clearance between each armature and its
magnet core of 0.030 inch, measured at the center line
of the core. (Use special 0.030-inch gage issued to
measure clearance between feed and idler roll.)
3. Check adjustment of permutation bar travel and adjust-
ments 1 and 2 by tripping, one at a time, several latches
across the unit. Clearance between closest tripped latch
and restoring bail should be at least 0.002 inch. Readjust
if this condition is not present.
4. Adjust restoring bail pivots so that the restoring bail
operates freely but has a minimum of clearance in the
pivots.
4.12.5 Upper Permutation Support Adjustment
1. Loosen the two end screws in the upper front guide rail
and the four screws holding the plate comb.
2. Position the comb for 0.0 10-inch (t0.005-inch) clear-
ance between latch bar and permutation bars (B, Figure
4-53).
3. Position upper front guide rail evenly for 0.005-inch
clearance to permutation bars.
4.12.6 Key Unit Adjustment
1. Loosen the four screws (Figure 4-55) that hold the key
unit to the permutation unit.
2. With key plate level, and with no interlocks affected, a
50-gram to 80-gram weight on any keytop (except
ERROR RESET, FEED, PROG ONE, PROG TWO,
LEFT ZERO, DUP, NUMERIC, MULT PCH, ALPHA,
and the space bar) must be sufficient to trip its latch
assembly. The key must return to its normal position
with a logram minimum weight resting on the keytop,
when its latch assembly has been previously restored.
3. With key plate level, and with no interlocks affected, a
75-gram to 100gram maximum weight on the space bar
and left-zero key must be sufficient to trip its latch
assembly. The bar must return to its original position
with a 10-gram weight resting on it when its latch
assembly has been previously restored.
4. With key plate level, and with interlocks affected, a
90-gram maximum weight on any keytop (except
ERROR RESET, FEED, PROG ONE, PROG TWO,
LEFT ZERO, DUP, NUMERIC, MULT PCH, ALPHA,
and the space bar) must be sufficient to trip its latch
assembly.
5. ERROR RESET, FEED, PROG ONE, PROG TWO,
LEFT ZERO, DUP, NUMERIC, MULT PCH, and
ALPHA keys must travel 0.125 inch with 50-gram to
80-gram key pressure.
6. With any latch assembly dropped, no hook should slip
off its latch when its keytop is struck by a quick sharp
blow with the finger. The exception to this is the release
key latch assembly.
Figure 4-55. Keyboard Permutation Unit
-
Bottom
,
29
FEMM
(4169)
4-39
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