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10.
While holding a slight tension against the cable going onto the drive spool with one
hand, use the other hand to rotate the motor shaft in a clockwise direction and wind
the cable onto the spool until the carriage rests against the left endplate and all
stack is taken up.
There should now be approximately 8 1/2 turns of cable on the spool on the end nearest the
drive motor.
11.
With the carriage against the left endplate, begin installation of the right-hand cable
(125) by placing the beaded end of the cable into the outer slot on the drive spool.
Lead the cable left into the groove at the end of the slot and place a finger over it to
hold the cable in the proper groove.
12.
Grasp the cable several inches from the spool and loop that cable around the spool
in a clockwise direction as in Figure 4.6. Remove your finger from the first groove
while holding tension on the cable and use your finger to hold the first complete
wrap in place. Loop the cable around to the bottom of the spool for a total of 1 1/2
turns.
13.
Using one hand to hold tension on the cable (125) from the spool, thread the stud
end of the cable through the right endplate (82), around the idler pulley (96) and
back through the endplate (82).
14.
Continue to hold tension on the cable (125) and install the outside nut (74) on the
right-hand cable stud. Install the cable stud as previously done in step 6.
15.
Inspect the installation of the drive cable to the drive spool. It should appear as in
Figure 4.6.
16.
The screwdriver may now be removed from the idler arm (156) on the left endplate
(144). The carriage drive system is now re-tensioned. Manually move the carriage
across from one endplate to the other and observe the operation of the cable system.
The system should move freely with only a slight drag caused by the carriage drive
motor and the ribbon advance mechanism (if connected). Drive cables should track
smoothly across the drive spool as the carriage is moved end to end.
17.
Figure 4.7 illustrates how to inspect for proper vertical and horizontal tracking of
the drive cables. Note that this inspection should be made with the deter handle in
the center position. Simple replacement of cables should not require any adjustment
of cable tracking. If other components such as idler pulleys or carriage cable
brackets are changed, alignment of these components will be necessary. With the
system strung, but with the tension relieved as in step 1 above, loosen and adjust
affected pulleys and/or brackets until the cables track properly as in Figure 4.7. Be
sure to securely re-tighten all hardware.
4-18
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