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DFX-8500
Rev. B
2-1
0
2.1.5 Ribbon Feed and Tractor Select Mechanisms
The RF motor supplies power to both the ribbon feed and tractor select mechanisms. The rotation of the
RF motor pinion swings the ribbon feed select gear like a pendulum, using the lever axis as a support
point. The rotation of the RF motor is transmitted after the gears are engaged. When the RF motor pinion
gear rotates counterclockwise, the motor rotates the ribbon feed mechanism; when it rotates clockwise,
the motor rotates 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 RF 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 to feed the ribbon.
RF Select Gear RF Drive Gear
RF Transmission Gear
RF Motor
Ribbon Cartridge
Winding Roller
Figure 2-11. Ribbon Feed Mechanism