Control method for an excavator

The present invention relates to a control method with respect to the operation to be related to the automation of an excavator, in particular one of the basic operation of the excavator flat work to improve the operability and working efficiency. Control method according to the present invention, a bucket, an arm and a pivot operation of the working device operation input means for using the manual operation signal according to the operation input signal from the operation device operating input means, and operation of the boom is that the boom If the operation, in the case using the manual operation signal and does not have, the operation of the working device operation input means, wherein the boom rotation angle detecting sensor, a boom angle of rotation from the arm rotational angle detecting sensor, and a bucket rotational angle detecting sensor, the arm rotation angle and the bucket rotates boom through the respective data and a flat working predetermined geometric calculation on the basis of respective data, to follow the position of the bucket end constant flat work flat working plane having an angle to the arm operation the controls using an automatic operation signal through a predetermined control operation with respect to the reference rotation angle.