Kenyon & Kenyon
Method for controlling the operation of power excavator
 A method for controlling the operation of a power excavator during a land finishing work is disclosed. In the above method, the bucket, arm and swing unit are controlled in response to output signals from a handling signal input means. Meanwhile, the boom is controlled as follows. That is, when a boom handling signal is output from the handling signal input means, the boom is controlled in response to the boom handling signal. However, when the handling signal input means does not output a boom handling signal, the boom is controlled by a geometrical operation of signals output from the boom, arm and bucket sensors and a land finishing angle for calculating reference boom angle data. The reference boom angle data is control-operated to output an automatic boom control signal, thus controlling the boom in order to move the bucket tip on a land with the land finishing angle in response to an arm handling signal output from the handling signal input means. 
Samsung Heavy Industries Co., Ltd.
E G G E B G G
E02F G05B G05B E02F B25J G05B G05B
inventional additional additional inventional inventional additional additional
Myung Hoon Jeong Yong
Song Seo