Tractor select mechanism

Figure 2-12 shows the operation of the tractor select mechanism. Clockwise rotation of the RF motor is transmitted to the tractor select cam through the ribbon feed select gear and tractor select transmission gear, and rotates the tractor select cam clockwise. The tractor select lever contacts the inside curve of the cam due to the spring force; when the cam rotates, the tractor select lever moves horizontally along the curve.

When the tractor select lever is set to the left, the tractor select gear engages the rear tractor assembly train, and the PF motor rotates the rear tractor assembly. When the tractor select lever is set to the right, the tractor select gear engages the front tractor assembly. The tractor Select sensor contacts the cam and closes when it reaches the convex portion.

The ribbon jam sensor is used to detect ribbon jam condition and to count ribbon life.

Epson 300 Gear Motor
Figure 2-12. Tractor Select Mechanism

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