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Ribbon Drive
The ribbon is driven by a belt mounted on the
type belt drive pulley. The drive mechanism
also includes a solenoid-driven clutch to disen-
gage the drive from the ribbon when no printing
is taking place. Disengaging the clutch prevents
smudging the paper while the printer is idle.
The ribbon is a continuous
1/2
inch wide fabric
ribbon contained in a cartridge mounted on the
front of the printer. The ribbon is fed into the
left side of the cartridge and pulled out the
right side (as viewed from the front of the
machine).
Type Belt Drive
The type belt is driven directly by a stepper
motor mounted under the left pulley.
When belt go is activated, the belt oscillator
is gated and ramps the stepper motor up to
speed.
The right pulley has a release lever mounted on
it to remove tension from the type belt. When
the release lever is operated, the type belt can
be removed.
Belt Go
(belt oscillator)
Ramp
Counter
Belt Advance Pulse
Drive Belt
Drive Motor
Type Belt
Transducer
Type Belt
Release
Ribbon
Type Belt
Missing Timing
Mark
(home pulse)
4-6
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