IBM Selectric I/O Reference Manual page 19

3. Armature Stop - With the armature manually attracted,
adjust for a clearance of .004" to .008" between the
armatures and yokes (Fig. i 2 - see Fig. 1 I for assembly
end view). Measure clearances at the outside arma-
tures (T2 & R5) •
~-~~
~---J
_ _
=~-=-
Guide Plate Screw
Armature Stop
Stop Screw
4.
FIGURE
11.
Armature Stop
Armature Guide - Position horizontally so that the arm-
atures are centered in the guide slots (Fig.
11).
.004 11 to .008"
Armature
oke
Armature Stop
FIGURE 12. Armature Stop
5. Back Stop (Fig. 13) - Position vertically (with arma-
tures at rest) for a clearance of .04111 to .044 11 between
the armature stop and armatures. Measure clearance at
the outside armatures (T2 & R5).
Armature
Armature Stop
FIGURE 13. Armature Backstop
6. Pivot Eccentrics (Fig. 14) - Adjust so that the cycle
clutch trip bai I is parallel to the armatures. The follow-
ing procedure may be used:
a. Disconnect the trip link (Fig. 18).
b. Apply slight pressure to the knockoff extension (Fig.
17) or trip link extension to hold the bai I in contact
with the armatures.
c. Apply slight pressure to the T2 and R5 armatures (Fig.
10). Both armatures should be touching the trip bail.
It not, adjust the pivot eccentrics to satisfy this con-
dition.
2-4
-Just Touches
FIGURE 14.. Pivot Eccentri cs
NOTE: The high point of the pivot eccentrics must be
toward the top (paper feed area) of the machine
-:-IT
the
pivot eccentrics are not positioned to the top, the print
magnet armatures wi II contact the tri p ba i I too soon,
causing sluggish operation or failure to trip the cycle
clutch.
d.
NOTE:
After completing step c, whi Ie holding the trip bai I
agai nst the armatures, check the center armatures to
be sure they are touching the trip bailor clear it by
a maximum of .002". Excessive ciearance can cause
extra cycles.
Item 6 is a preliminary adjustment. For final aajustment,
see note under Item 3 of cycle clutch trip mechanism.
7. Magnet Unit (Fig. 15) - Position under its two mounting
screws for .005 11 to .010" clearance between the pusher
tai Is and armature latching surfaces (armatures at rest).
Power Frame
FIGuRE 15. Magnet Unit Position
8. Mounting Bracket (Fig. 16) - Position under its four
mounting screws for .00111 to .010 11 clearance between
the pusher tai Is and armatures.
NOTE:
Adjustments 7
&
8 are interacting - both requirements
must be satisfied.
Excessive clearance may cause mal-selection since the
armature may not hold the pusher tai I when the magnet
is not energ i zed.