FRONT CONTROLLER FOR CONSTRUCTION MACHINERY

摘要

PROBLEM TO BE SOLVED: To perform correction control capable of smoothly correcting without making large variations in command value for a working device when manual intervention to a posture of the working device is made in a front controller of construction machinery, returning to an original posture by returning a manually operated device and fitting to an operating sense of an operator. SOLUTION: In a control unit, a target bucket angle is calculated from a pivoting angle and a target bucket ground angle detected by angle detectors 8a and 8b by a target bucket angle operation section 9f. A correcting quantity of the target bucket angle is calculated from a control signal S4c of a bucket control lever by a target bucket angle correcting quantity operation section 9g. The target bucket angle is corrected by adding a correcting quantity to the target bucket angle in a target bucket angle correction section 9h, the target bucket angle is obtained after it is corrected, and a flow controlling valve 5c is driven so as to obtain the angle.