Table of Contents
Advertisement
are set. The gang clear finger can be moved right
or left slightly to insure positive clearing of desired
stop. The tab stop directly to the left may also be
cleared or partially cleared.
TABULATOR MECHANISM
1.
Tab Lever Stop - Form the stop on the escapement bracket
(Fig.
161)
to obtain
.00111
to
.003 11
clearance between
the vertical lug on the tab lever and the backspace pawl
when the tab lever is at rest and the backspace pawl is
fully seated in its rack.
3.
Tab Rack - Adjust the tab rack left or right for a c lear-
ance of
.005"
to
.020
II
between the tip of the tab lever
pawl and a set tab stop with the tab lever latched out.
This adjustment is made by the tab rack bushing on the
RH end of the¥tab rack. The clearance may be observed
by holding the carrier and latching the tab lever out.
NOTE:
The head of the tab rack bushing should clear
the tab rack plate by approximately
3/32
11
when the ad-
justmentiscomplete. (Fig.
163).
Tab Rack Plate
/ /
Tab Stop
Tab Rack
Adjust Tab Rack
. '
Bushing
_
-.......
~-
Bushing
2.
Tab Lever Stop
--
Tab
Lever
~ ~~,....i_
.001"
to
.003"
Backspace Pawl
~
FIGURE
161 •
Tab Lever Stop
This small clearance insures that the backspace pawl wi
II
be allowed to bottom in its rack and that a minimum a-
mount of tab lever moti on wi
II
be requi red to remove
both the backspace and escapement pawls from thei r
racks during a tabulation operation.
Tab Lever Pawl - Adjust the pawl forward or back on the
tab lever so that the ti p of the pawl clears a SE T tab stop
by
.035"
to
.045 11
with the tab lever at rest (Fig.
162).
Tab Rack
;
::0,~
~"""""""''''''''''''Iin'!r
Tab Lever
:
~-,-
1r=1_~.03511
to .045
rr
'C
:J'I
,...,
G
(j[j
Adj ust Tab Lever
\
.J
U
O
I
I
'---.,
~
Paw
U
FIGURE
162.
Tab Lever Pawl
The adjustment of the tab lever pawl has an effect on the
amount of overlap between the tab stop and the pawl ti p
in the active position. It also directly affects the pawl
clearance duri ng tabu lati on. Un I ess the tab lever pawl
is properly adiusted, correct pawl clearance cannot be
obtained.
The adjustment of the tab lever paw! can be measured
by
using the push-end of the large spring hook. The push-
end is approximate Iy
.035
11
thi ck.
2-48
~.OO5"to
.020"
Tab Pawl
FI GURE
163.
Tab Rack Bushing
The tab rack adjustment sets up a condition whereby the
escapement pawl wi
II
be released into the escapement
rack at the right time to safely engage the correct tooth.
If the tab rack were too far to the left, the tab lever
would contact the set tab stop sooner
a~d
release the es-
capement pawl into the rack earlier than it should. The
pawl cou Id enter the wrong escapement rack tooth and
stop the carrier one space to the left of the desi red stop-
ping point. The carrier could stop one space too far to
the right if the tab rack were adjusted too for to the
right.
4.
Pawl Clearance - The upright lug of the' tab latch should
be formed forward or back so that the tip of the escape-
ment pawl clears the escapement rack teeth by
.005"
to
.0lOlI when the tab lever is latched to the rear.
~
~,~~,~§tl
SMail
Screwdriver
iY
Latch Should
Be
l';~:'L'
,
Escapement Bracket
Fonned For C lea ranee
~,
____ ' I'
, /
.---- e
If.~
I'~
_,-://
Tab
l.ever.~':';07
./.:.-
"-"A-~
' "
/~Ari '~:, /~
_
/~ Escape~ent
Rack
@'Y
/y
.005"
to
.010"
, / / Escapement Pawl
/ /
FIGURE
164.
Pawl Clearance Adjustment
Advertisement
Chapters
Table of Contents
