Teletype 28 - Page 33

2. 23 Punch Mechanism for Fully Perforated Tape
(A) PUNCH PUll PENETRATION.
(1) Requirement
ISS 8, SECTION 573-118-700TC
Note: Adjustments on this page do not apply
to tape printer.
With the LETTERS combination (12345) selected, function clutch engaged, rotate main
shaft until all punch pins are into or above the tape aperture in punch block. With the
TP159926 gauge in position
r------Min 0. 050 inch
clearance between feed pawl stud and the ga_uge.
(2) Requirement
With LETTERS combination selected, function clutch engaged, rotate main shaft until
all punch pins have cleared the punch block. With the TP159926 gauge in position
Min some---Max 0. 080 inch
clearance between feed pawl stud and gauge.
To Adjust
Refine the TOGGLE BAIL ECCENTRIC (2. 21) adjustment keeping the indent to the right of a
vertical centerline through the shaft. Tighten nut.
MIN
MAX
TING ARM
t
TAPE GAUGE
TP159926
OSCILLATING SHAFT
(B) PUNCH SLIDE GUIDE
(Final)
Requirement
The punch slides should align with their
corresponding punch pins and be free of
binds after tightening the guide mounting
studs. Each punch slide should return
freely after being pushed in not more
than 1/16 inch.
To Adjust
Position the guide with its mounting studs
friction tight. Tighten studs.
PUNCH SLIDE DOWNSTOP POSITION
Requirement
With function clutch disengaged and latched,
play taken up toward the top, clearance be-
tween both the front and rear punch slides
and the downstop plate
,----Min some---Max 0.008 inch
All other punch slides should have some
clearance.
Note: To check for some clearance, place
unitin stop position, trip function trip
mechanism and latches. The punch slides
should move fully to their operated position.
To Adjust
With unit in stop position, loosen the two
downstop plate mounting locknuts and locate
the downstop plate to meet the requirement.
_..-PUNCH PIN
PUNCH SLIDE
GUIDE
OOWNSTOP
PLATE
MOUNTING NUTS
MOUNTING STUDS
(Front View)
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