IBM Selectric Reference Manual page 164

14.5
PRINT MAGNET ADJUSTMENT
An improved method of checking the backstop adjust-
ment is:
Manua Ily attract the magnet armature and insert a
fee ler, gage between the armature and backstop (see
Figure below). When checking it by this method the
clearance should be
.046"
to
.049".
If the adjust-
ment is found to be correct a II precedi n9 adj ustments
must be checked. It wi II be necessary to remove the
magnet assembly for previous adjustments.
To
.044"
Present Adjustment
Figure
14.1
.046
To
.049
11
L~
Tqrn~~
Improved Method
Of Adjustment
14.6
All armqtures must not contact thei r cores when ener-
gized. Adjust the stops and pivot plate for
.004" -
.008" clearance between the armatures and yokes.
14.7
CYCLE CLUTCH TRIP
If problems are encountered with cycle clutch trip-
ping when only one armature is used, check the Cycle
Clutch Trip Mechanism to determine if it is the old
style. The old style trip mechanism (trip lever) is
connected directly to the Cycle Clutch Trip Bail.
The new style trip lever is spring loaded and the
Cycle Clutch Trip Bai I Link is connected to a latch
lever which releases the trip lever.
14.8
S.H.EXTRACYCLES
If the normal routine of print magnet, keyboard, and
cyc Ie clutch adjustments fai I to a IIeviate an extra
cycle condition, the cycle clutch trip bail (some-
times known as the knock-off bail) should be inspected.
If the cycle clutch trip bail does not provide suffic-
ient knock-off motion to the center armatures, extra
cyc les wi" resu It. There have been a few iso lated
instances where the cyc Ie clutch tri p bai I has been
found to be warped or out of alignment in the center
portion.
The adjustment of the cycle clutch trip bai I is made
by depressing the extreme right and left hand arma-
tures and observing a clearance of
.003"
to
.008"
between the cyc Ie trip bai I knock-off and the knock-
off eccentrics. Check the cyc Ie trip bai I knock-off
by depressi ng and ho Idi ng a center armature, hand
cycle the machine through an operation and observe
the manually held armature. There should be a slight
rise in this armature at the knock-off point. If there
5-20
is no rise, adjust the knock-off eccentrics to the min-
imum
.003"
clearance. A center armature shou Id
again be depressed and checked for knock-off. If
knock-off is still not present, the cycle
tri~
bail,
PN
1135135,
should be replaced with a new one.
14.9
The latch lever shou Id bite the thickness of the trip
lever lug.
14.10 With an armature manua lIy attracted the latch lever
shou Id c lear the trip lever by
.020".
14.11
The trip lever should clear the latch by
.003"
to
.010".
14.11
The trip lever should clear the latch by
.003 H
to
.010".
NOTE: This adjustment applies only to Keyboard
Printers. See Reference Manual for Keyboardles:
adjustments.
CYCLE CLUTCH
15.0 Cycle Clutch - Adjustments & Special Notes
15.1
CYCLE SHAFT END PLAY
The cycle shaft end play should be
.001" - .003"
(tap the shaft very LIGHTLY to insure proper seating).
15.2
LATCH HEIGHT
The cyc Ie clutch latch height must a Iways be checked
before attempting cyc Ie c llitch collar adjustment
(Fig. 15.1). If the latch is too high, extra cycles
may occur. If the latch is too low, the cycle clutch
may not un latch.
, 3 Line
Figure
15.0
Cyc Ie clutch latch wear can be caused by the lat-
ching surface not being parallel to the cycle clutch
sleeve. To insure that the latch is parallel to the
sleeve, it should be adjusted in the following man-
ner: