Teletype 28 - Page 41

ISS 8, SECTION 573-118-700TC
2.31 Punch Mechanism for Fully Perforated Tape (Indentations of Feed Wheel Fully Punched Out)
Note: Adjustments on this
page do not apply to tape
printer.
(Front View}
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DIE WHEEL
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TEN CHARACTERS PER INCH (Preliminary)·
(1) Requirement
Indent of die wheel eccentric stud pointing
downward.
To Adjust
Position die wheel eccentric stud with locknut
loosened. Tighten nut.
(2) Requirement
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With tape shoe blocked away from feed wheel,
feed pawl and detent disengaged, and tape
removed, feed wheel should rotate freely.
Check through 3 or 4 revolutions of feed
wheel. Refine requirement (1) above if
necessary to meet this requirement.
Note: Before proceeding with the following
adjustment check both BIAS SPRING (2.35)
tensions, and if unit is equipped with a slack
tape mechanism having a clamp plate with an
adjustable wear disc, loosen the mounting nut
and turn a new edge of the disc toward the tape.
Tighten nut.
_ TP156011 GAUGE
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\~TAPE
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TEN CHARACTERS PER INCH (Final) (Early Design) (For Latest Design See 2. 33)
(1)
Requirement
With a piece of tape perforated with six series of 9 BLANK code combinations followed
by a LETTERS combination placed over the TP95960 gauge or the smooth side of the
TP156011 tape gauge so that the circular portion of the first number 2 code hole in the
tape is concentric with the first hole of the tape gauge, the next four holes in the tape
gauge should be visible through the number 2 code holes in the tape and the circular
portion of the last (sixth) number 2 code hole in the tape should be entirely within the
0.086 diameter hole of the tape gauge.
(2) Requirement
With tape shoe held away from feed wheel, feed pawl and detent disengaged and tape removed,
feed wheel should rotate freely.
To Adjust
With tape removed from punch mechanism, loosen eccentric locknut and rotate die wheel eccen-
tric shaft until it binds against feed wheel. Back off eccentric until die wheel is just free. Check
through 3 or 4 rotations. Keep the indent of eccentric below the horizontal centerline of the stud.
Refine adjustment for requirement (1), if necessary, by moving the die wheel toward the feed
wheel to decrease the character spacing and away from the feed wheel to increase the character
spacing. Tighten nut. Refine FEED PAWL (2. 25) adjustment, if necessary.
CAUTION: WITH TAPE REMOVED. MAKE SURE FEED WHEEL AND DIE WHEEL DO NOT
BIND. RECHECK REQUffiEMENT (1).
IF NECESSARY, REFINE.
Note: First through fifth holes in gauge are same size as code holes in tape (0. 072 inch diameter).
Sixth hole in gauge is larger (O. 086 inch). This arrangement allows _:tO. 007 inch variation in 5 inches.
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