Ribbon Feed And Tractor Select Mechanisms - Epson DFX-8500 Service Manual

DFX-8500

RIBBON FEED AND TRACTOR SELECT MECHANISMS

The ribbon feed motor supplies power to both the ribbon feed and tractor select mechanisms. The rotation of
the ribbon feed motor pinion swings the ribbon feed select gear like a pendulum, using the lever axis as a
fulcrum. The rotation of the ribbon feed motor is transmitted after the gears are engaged. When the ribbon
feed motor pinion gear rotates counterclockwise, the motor drives the ribbon feed mechanism; when it
rotates clockwise, the motor drives the tractor select mechanism.


Ribbon feed mechanism:
Figure 2-11 shows the ribbon feed mechanism. The ribbon is fed in only one direction. Counterclockwise
rotation of the ribbon feed motor is transmitted to the ribbon feed gear through the ribbon feed select gear
and ribbon feed transmission gear. The ribbon feed drive gear engages the winding roller on the ribbon
cartridge and feeds the ribbon.
Ribbon Feed
Select Gear
2-10
Ribbon Feed Transmission Gear
Ribbon Feed Motor
Figure 2-11. Ribbon Feed Mechanism
Winding Roller
Ribbon Cartridge
Ribbon Feed Drive Gear