IBM Selectric - Section 2. Adjustments; MOTOR AND DRIVE; Selection Mechanism; Latch Bail Shaft

3.
4.
Adjust Interposer Guide
Loosen Four
Screws
------..4IQ1o..-'I
Interposer
.020" To .030"
FI GURE 3. Rear Interposer Guide Comb
ing the guide comb adjustment is to latch one interposer
down, depress an adjacent interposer until it is locked
out by the selector compensator, and then slowly hand
cycle the machine. The filter shaft should contact the
interposer that is latched down and miss the adjacent
'interposer by at least .005
11
• This check should be per-
formed at several places along the filter shaft.
WARNING: The selector compensator tube is mounted
to the rear of the interposer guide comb by four clamps
and must move up and down with the guide comb when
the guide comb adjustment is made. Be sure to loosen
the guide comb mounting screws completely before at-
tempting to move the gu'ide comb. Do not hammer the
guide comb into position asthis can cause the compensator
tube to shiftwith respect to the guide comb. The vertical
position of the tube on the guide comb is set with respect'
to the stop strap riveted along the bottc;>m of the guide
comb and should not be disturbed.
Bail Parallel
a. Loosen cycle bai I up stop and move it up out of the
way of the cycle bai I.
b. Adjust the left hand bail anchor plate forward or
back in its oversized mounting holes so that the
selector bails will be parallel to the lugs on the
interposers.
c. Adjust the bail anchor plate up or down so that the
cycle bai I will rest as evenly as possible on all the
interposers.
NOTE: The selector bails must be parallel to the inter-
poser lugs so that the same travel wilt be given to the
bai Is by the various interposers. A loss of motion to the
selector latches could result from an unparallel condi-
tion. The cycle bai I must be parallel so that t"he inter-
poser latch springs can be adjusted evenly.
Interposer Latch Springs (Preliminary) With the H inter-
poser latched down, adjust the left hand end of the right
hand section of latch springs so that there wi II be approx-
imately .015" remaining travel of the interposer before
it bottoms (Fig. 4). Check this clearance by pulling the
interposer down with a spring hook.
2-2
5.
Loosen To Adjust
Guide
.015
11
Approx.
FI GURE 4. Interposer Latch Spring Adjustment
Cycle Clutch Latch Bite - Adjustthe cycle clutch keeper
bracket forward or bOck so that the cycle cI utch latch
overlaps the step on the cycle clutch sleeve by .030
11
to
.035
11
(the thickness of the metal plate). (Fig. 5)
The overlap can readi Iy be observed from the bottom of
the machine.
Cycle Clutch Keeper
Bracket
.030 II To. 035
11
-~I~f---
6.
FI GURE 5. Cycle Clutch Latch Bite Adjustment
Insufficient overlap could allow the cycle clutch sleeve
to ki ck past the latch and cycle again. Excessive over-
lap would sl ightly delay the unlatching action of the latch
and create a sluggish action.
Cycle Clutch L,atch Restoring
a. Late Style - Position the restoring roller so that the
latch pawl overthrows the keeper by .020
11
to .025
11
with the restoring cam on its high point. Check on
both restoring cam lobes and adjust on the lobe pro-
viding the least motion (Fig. 6).
Restoring Roller
.020" To .025"
Cycle Clutch I
Keeper ~~
Cycle Clutch
Latch Pawl
~d'J2
.~~
Do Not Overthrow Into Sleeve
FIGURE 6. Cycle Clutch Latch Restoring, Late Style