Punch Feed - IBM 1402 Manual

Punch
Feed
Manual.,A
Trip
Lever
Punch Feed Crank
Figure 7. Front View (Covers Open)
~rote:
Should it be necessary to remove the read check,
read, punch check, or punch feed reading brushes, care
should be taken to avoid contact between the reading
surface of the brushes and any other part of the 1402.
Such contact may damage the individual brushes or, with
the main system power still on, blow a fuse. Replacement
of the brushes requires equal care. The hand feed wheel
should be rotated as the read feed brushes are reinserted.
After removing the jam, make sure that all latching pins
are snapped into place before running cards out, entering
new cards, and resuming operation. Repetitive reader or
punch check conditions, immediately after a brush block
has been replaced and operation restarted, may indicate
damaged or short-circuited brushes.
Punch Feed
If a jam should occur in the punch feed, first turn off power
to the 1402 reader and punch units, then open the top
Hand Feed Wheel
covers of the 1402, and try to remove the jam from the top.
If this is not possible, trip the manual clutch lever behind
the front cover, crank the feed to a setting between 335
0
and 350
0
,
and remove the punch die (Figure 8).
Punch Die Removal
The punch die can be either of two types: side-locking
or top-locking. The side-locking die is characterized by a
pair of handles on the underside of the die assembly; the
top-locking die has one handle, shaped like an inverted T.
Before the punch die can be removed, the plastic chip
funnel under the die must be taken out and, on machines
with a lowering frame, the lowering-frame knob must be
rotated. To remove the side-locking die, grasp the two
handles in one hand and squeeze them together. This
releases the die from its attachment to the punch frame.
With the die removed, reach into the space vacated by the
die assembly and remove any cards that have jammed there.
The top-locking die is removed in the same manner, only
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