Importance

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Abstract

An excavator comprises a frame, a boom assembly and a control architecture. The control architecture may include a first actuator, a second actuator, a third actuator, a user input interface, a storage medium having a control algorithm, and a controller configured to execute the control algorithm to: receive a target grade request from one or more of the user input interface and a storage medium; receive a dipper stick position relative to the pivot axis; receive a direction of movement of the dipper stick; determine whether the dipper stick position is outside the pivot axis or inside the pivot axis; and operate the first actuator in automatic mode to automatically adjust the pivot axis height relative to the frame when the dipper stick position and the direction of movement of the dipper stick are within the automatic control region for automatically maintaining a target grade.

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First Claim