Damper (Hd) - Centronics 101AL Technical Manual

5.
6.
DRIVING MECHANISM
Drum may be disassembled by removing nuts (HC-9) and
shaft (HC-8).
To assemble, reverse above procedure.
5.2.4.3 Adjustments
1.
5.2.5 DAMPER
Spring drum w/main spring (HC-1) should have only enough ©
tension to return carriage unit smoothly from any position
to starting position without any other force.
Main spring tension should be 1 to 1.4 kg (2.2-3.1 lbs).
To adjust, loosen nut (HC-12) and back off screw (HC-11)
slightly; this will release the holding pawl (HC-10).
Rotate spring drum (HC-1) counterclockwise to increase
tension, and rotate clockwise to decrease tension.
Proper tension will be obtained by winding spring drum about
ten times when carriage is positioned at starting position.
The purpose of the spring drum is to hold down carriage
motion at home position, so that 11 windings is about maximum.
Note that pawl is easily released from teeth on spring drum
with main spring loosening at once if nut (HC-12) and screw
(HC-11) are loosened too quickly.
(Fiqure HD)
5.2.5.1 Operation
1.
Dampens return print head motion.
5.2.5.2 Removal/Replacement Procedures
1. Remove screws (HD-29) to remove complete unit.
Loosen nut (HD-24) and back out center screw (HD-23). Remove
unit damper cylinder (HD-1) from frame (HD-37).
Remove snap ring (HD-16) and remove pin (HD-21).
Remove lid (HD-11) by removing screws (HD-12).
Remove spring (HD-10). .
Take off split pin (HD-9) from nut (HD-8).
Remove nut (HD-8).
Remove steel washer (HD-7) and packing (HD-6).
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