Open Strap Contacts; Rt And Pt Relay, Model 3; Punch Emitter;Model - IBM 1402 Reference Manual

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o 44° 60°
BRUSH IMPULSE
PA 9AND 10
.-J
PA 13AND 14
AT PA 14 OPER
PUNCH SCAN
PA 1 AND 2
ATPA 1 N/O
LATCH RESET
PA 3AN04
PA 11 AND 12
lU
AT PA 12 OPER
PCH MAG COMM
PA 567AND 8
I
AT PA SOPER
Figure 3-49. P ACB Scope Pictures
Open Strap Contacts
ADJUSTMENTS
76° 92° 108 0
I I
1. Adjust all contacts for 1/32" minimum air gap.
2. Position all card lever contacts to give a mini-
mum of .020" movement of both contact points
when the card lever is operated by a card.
3. Bounce may occur within the make and break
tolerance of the card lever if the solid make and
break is within wiring diagram tolerance.
Emitter Housing Timing Hole
. 013"± .002"
Figure 3-49a. PA Emitter Assembly
3-40
124
0
140° 156° 172°
188°
TOL IN MS
MAKE
BREAK
U
+1/4 -1/8 +1/4 -1/8
+1/4 -0 +3/4 -3/4
L
i()
-1/4
i()
-1/4
I
r
+1/4-0
+1/4 -0
RT and PT Relay, Model 3
ADJUSTMENTS
Adjust the drop out time of each relay so that the re-
spective motor will continue to run for 30 seconds
after the last card feed cycle. Potentiometers for ad-
justing the delay are mounted on the signal fuse
bracket, (under the read feed) toward the rear of the
machine.
Punch EmiHer, Model 2.
This is a contact-type emitter, with contacts mounted
around a molded block, and actuated by push rods.
The push rods are operated by a roller, fastened to a
rotor arm. The device is self-centering.
ADJUSTMENTS
1. Form contacts to obtain .006" to .008" air gap
when roller is off the push rod.
2. Set duration of each contact for 13° to 17°
by adjusting the rotor roller eccentric. See Figure
3-50. Duration is most easily set by commoning
all contacts, and reading continuity from com-
mon to each contact with the dynamic timer .
3. Loosen locking screw on rotor and position rotor
on shaft for correct timing according to wiring
diagram. Retighten locking screw.