Section 8.Theory of Operation

Wire Guidance System

Wire Guidance System

Functional Overview

When the auto/manual switch (S61) is set to auto, the lift truck is placed in seeking mode. The following conditions are present in seeking mode:

•Horn chirps at approximately 20 chirps per second

•The steer LED representing the closest position of the drive unit flashes continuously

•Max. travel speed, tractor-first = 2 mph (3.2 km/hour)

•Max. travel speed, forks-first = 1 mph (1.6km/hour)

•Steering control resides with the operator

As the lift truck approaches the guide wire, the near wire coils sense the wire. When the guide wire is between the near wire coils of one of the sensors, the lift truck enters the acquire mode. The following conditions are present during the acquire mode:

•Horn stops chirping

•All 5 steer LEDs flash signaling the lift truck senses the guide wire

•Steering control shifts from the operator to the Guidance Manager

•Lift truck automatically steers on the wire

•Max. travel speed, tractor-first = 2 mph (3.2 km/hour)

•Max. travel speed, forks-first = 1 mph (1.6km/hour)

After the lift truck straightens so the guide wire is between and parallel to the near wire coils of both the tractor and load sensors, the lift truck changes to guide mode. The following conditions are present during guide mode:

•All 5 steer LEDs stay lit continuously

•The Guidance Manager controls steering

•Lift truck can travel at full speed