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Head load
Heads-loaded
Base Plate _ _ _
J
Pivot Bracket Mounting Screw
Figure 7-5.
Head Load Assembly Adjustment
5.
With the carriage detented at track 000, loosen
the two solenoid mounting screws and the sole-
noid adjusting screw. Slide the solenoid back-
ward until the pivot plate contacts the head-
loading roll pin in the head load cam. Continue
to slide the solenoid back until the cam moves
all the way into the cam followers. Tighten
the solenoid mounting screws and position the
solenoid adjusting screw against the back of the
solenoid.
6.
Back off the solenoid adjusting screw one turn,
and tighten the lock nut. Loosen the solenoid
mounting screws and slide the solenoid back-
ward so that it will bear lightly against the
adjusting screw.
7.
Check clearance between the pivot plate and
loading roll pin. This clearance should be
within 0.030
(±O.
010) inch. Tighten the solenoid
mounting screws after this clearance has been
obtained.
8.
Access the carriage to track 199. Use a dental
mirror to check for a minimum clearance of
0.010 inch between the pivot plate and the head
loading roll pin while the carriage is positioned
at track 199. This check determines parallel-
ism between the carriage rail and pivot plate.
7.8
Solenoid
Solenoid Adjust
Screw and
locknut
Solenoid Mounting Bracket
9.
Shut down the machine and manually move the
carriage between the forward and rear crash
stops. There should be a minimum clearance
of 0.010 inch between the pivot plate and the
head unloading roll pin for all carriage positions.
10.
If
conditions of parallelism between the pivot
plate and roll pins in steps 8 and 9 are not
apparent, it will be necessary to adjust the pivot
bracket to obtain the required clearances. This
is accomplished by first loosening the forward
mounting screw of the pivot bracket, then
loosening the rear mounting screw 1/8-turn
each, and tapping the forward end of the bracket
in the proper direction to obtain parallelism.
NOTE:
It
may be necessary, in some instances,
to move the rear end of the pivot bracket also, to
obtain the
O.
010 inch clearance for parallelism.
11. Repeat steps 5 through 9
to
ensure that other
adjustments have not been altered.
12. Adjust heads loaded switch using the follOWing
procedure.
a.
Slide switch toward head load contact point
against the head load actuator link and re-
move the masking tape.
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Table of Contents
Troubleshooting
