Bell System Practices Plant Series Adjustments page 19

2. 12 Tape Feed Mechanism (28B Unit)
TOP
PLATE
TAPE
PLATE
FEED PAWL
FEED-RATCHET
DETENT SPRING
0 00 o OO
0 00 ooo
0 00 ooo
0 00 ooo
0 00 ooo
o oo o oo
o ooooo
o oooo o
o ooooo
o ooooo
o ooooo
o ooooo
o ooooo
o oooo o
oooooo
oooooo
oooooo
oooooo
0 0 0°00
o,ooooo
FEED
RATCHET
FEED-WHEEL
DETENT
FEED-WHEEL
DETENT ECCENTRIC
ISS 3, SECTION 573-127-700
( A ) FEED-WHEEL DETENT
NOTE I
IF UNIT IS EQUIPPED WITH A START-
STOP LEVER, PLACE IT IN STOP POSI-
TION.
TO CHECK
PLACE A LTRS PERFORATED TAPE
OVER FEED WHEEL, TAK ING UP PLAY
IN FEED HOLES TOWARD THE RIGHT.
REQUIREMENT
SENSING PINS SHALL BE CENTRALLY
LOCATED IN CODE HOLES.
TO ADJUST
POSITION FEED-WHEEL DETENT
ECCENTRIC WITH ITS LOCKSCREW
FRICTION TIGHT. HIGH PART OF
ECCENTRIC SHOULD BE TOWARD
RIGHT. HOLD ECCENTRIC AND TIGHT-
EN GUIDE POST AND L O CKSCREW.
RECHECK ADJUSTMENT.
NOTE 2
FEED PAWL SH OULD BE HELD AWAY
TO FACILI TATE ADJUSTMENT.
FEED-RATCHET DETENT SPRING
(B)
REQUIREMENT
WITH FEED P AWL HELD AWAY FROM
RATCHET WHEEL
MIN. 7 Q].S.
MAX. 13 OZS.
TO MOVE DETENT ROLLER AWAY FROM
FULLY DETENTED POSITION.
Page 19