Patent ID: 8515708

Claim:
A method of calibrating a work implement location, the work implement being attached to a machine house, the method comprising the steps of (a) defining a h-frame comprising a set of Cartesian coordinate axes fixed to the machine house with the (X, Z) plane being in the sagittal plane of the machine house and the Y-axis being orthogonal; (b) utilising a range measurement sensor at a point p h =(x h ,z h ) in the h-frame to create a directed line of measurement in the (X h ,Z h )-plane of the h-frame originating at p h along which a range measurement is made, designated by angle θ h ; (c) defining a d-frame comprising a set of Cartesian coordinate axes fixed to the work implement; (d) providing a range measurement sensor target at a point p d =(x d ,z d ) in the d-frame on the work implement; (e) measuring a Cartesian distance d between p h and p d ; and (f) measuring corresponding positions of motors used to drive the work implement.