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4.6.27 Ribbon Drive Description
The printer uses an inked endless fabric ribbon
contained in a sealed cassette and fed by a
clutch drive mechanism. The clutch wheel is
operated by a toothed belt connected to the
type belt drive motor that advances the ribbon
only during printing.
The clutch engages by spring action and disen-
gages by solenoid action. When the solenoid
is energized (print unit closed and no print oper-
ation), the solenoid pivots the lever
D
and
compresses the spring
It
within the mech-
anism allowing the toothed section of the
clutch
rl
to disengage from the drive wheel.
During printing, the solenoid is de-energized
and the spring tension engages the teeth in the
clutch to turn the ribbon drive shaft.
If)
------~~~~~b~m
Solenoid Energized
Disengaged Clutch
Solenoid De-energized
Engaged Clutch
Belt Printer
2851pm
4-125
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