Transport And Stackers; Selection Mechanism; Principles Of Operation; Chute Blade And Selector Magnet Adjustment - IBM 1402 Instruction & Reference Manual

Card read-punch
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TRANSPORT AND STACKERS
SELECTION MECHANISM
Principles of Operation
The transport mechanism consists of six continuously
running feed rolls that move cards from the feeds to
the stacker selected by chute blades. Three of the
feed rolls are under control of the read feed. and
three are under control of the punch feed. Cards can
go into only three of the five stackers from either
feed.
The stacker into which the card enters is de-
termined by the selection mechanism at each end of
the transport mechanism (Figure 3-1).
The selection mechanism consists of two chute
blades and two control magnets for each of the read
and punch feeds.
With the select magnets de-
energized. the cards enter the stacker nearest the
feed; stacker NR for the read and stacker NP for the
punch. If the magnet that depresses the lower of the
two chute blades is energized. the cards go into 1 or
4. If the magnet that depresses both chute blades is
energized. the cards from either feed can go into
stacker 8/2.
A jam bar is installed over the length of the trans-
port mechanism. The bar consists of a spring steel
t:::(
=====~
PUNCH FEED SELECT MAGNETS
COIL
II
COIL
strip located just above the normal card line. Any
card that is bent enough to flex the metal strip causes
a switch to operate. The switch causes the machine
to stop and turns on the stop light. A card jam in the
feed portion of the machine is detected by other
circuits.
Chute Blade and Selector
Magnet Adjustment (Figure 3- 2)
1. Lower control key and indicator light panel by
loosening four holding screws and pivoting.
2. With pocket selector magnet armatures at-
tracted, adjust each armature for .035"
±
.003"
clearance between upper part of stop and armature.
3. Adjust selector magnet assembly (by use of
the mounting screws) to position the chute blades
1/32"
+
1/64" - 0 above card line when the magnets
are not energized, and 1/32" + 1/64" - 0 below the
card line when the magnets are energized.
4. Adjust chute blades (use the chute blade mount-
ing screw) for 1/32"± 1/64" clearance between end
of lower chute blade and lower card guide plate
(Figure 3-3).
5. Chute blade tension should be such that a force
READ FEED SELECT MAGNETS
L -___
C_O_,L ____
~I I~
__
C_O_,_L ____
~
PUNCH FEED CARD
LlNE~
v
POCKET
N/P
Figure 3-1. Card Selection Schematic
POCKET
4
POCKET
8/2
POCKET
I
POCKET
N/R
READ FEED CARD LI NE
3-1

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