Teletype 28 - Page 32

SECTION 573-118-700TC
2. 22 Punch Mechanism for Chadless Tape
Note: Adjustments on this page do not apply to tape printer.
PUNCH
~RETRACTOR
BAIL
(B) PUNCH SLIDE OOWNSTOP PLATE POSITION·
Requirement
With LETTERS selected and unit in stop position
PUNCH SLIDE (clutches disengaged), trip function reset trip mechanism
DOWNSTOP PLATE for some clearance. The punch slides should move
freely to their operated position •
.--------Min some---Max 0.008 inch
between front and rear punch slides and downstop plate.
All other punch slides should have some clearance.
(Front View)
q; ·---
~TOGGLE LINK
TOGGLE BAIL
ECCENTRIC SHAFT
PUNCH SLIDE
To Adjust
PUNCH SLIDE GUIDE
MOUNTING STUDS
Remove punch
slide guide, loosen downstop
plate mounting
studs, and position downstop
plate. Tighten studs and replace guide so
that punch slides align with punch pins (as
gauged by eye).
PUNCH RETRACTOR
BAIL
PUNCH PIN
I
PUNCH~
SLIDE
(A) PUNCH PIN PENETRATION
Requirement
LETTERS selected. Function clutch en-
gaged and rotated until punch pins have
traveled maximum distance into die plate.
Clearance between lower edge of punch
retractor bail and upper side of guideplate
(measured adjacent to No. 1 and No. 5
punch pins
where clearance is least)
GUIDE MOUNTING NUTS
'---------Min 0.060 inch---Max 0.075 inch
(C) PUNCH SLIDE GUIDE. PUNCH SLIDES
Requirement
LETTERS selected. Function clutch en-
gaged and rotated until punch slides just
touch punch pins. Punch slides should
align centrally with their respective
punch pins (gauge by eye).
To Adjust
Position punch slide guide with its
mounting nuts loosened. Tighten nuts.
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To Adjust
Rotate toggle
bail eccentric shaft with
its locknut loosened. Keep indentation in
eccentric shaft to left of a vertical center-
line through shaft. Tighten nut.
Note: Code
punches should punch a full
tape
lid with slight amount of tear. The
tear should be restricted to a minimum.
Refine PUl'-JCH PIN PENETRATION
adjustment, if necessary.