公开(公告)号：US20190093294A1

公开(公告)日：2019-03-28

申请号：US16136457

申请日：2018-09-20

Applicant: Roadtec, Inc.

Inventor： Byron Payne ,  James H. Bevill ,  Raleigh Harrelson

IPC: E01C23/088 ,  E01C23/12

Abstract: A milling machine includes a milling assembly having a housing to which left and right end gates are attached, a controller, a right front lifting column, a left front lifting column and a rear lifting column. Elevation sensors are located at the front and rear of each of the end gates. The controller is operatively attached to the elevation sensors and to linear actuators within the lifting columns of the milling machine. The elevation sensor that is located at the front end of the right end gate will provide feedback to control the position of the right front lifting column, and the elevation sensor that is located at the front end of the left end gate will provide feedback to control the position of the left front lifting column. The elevation sensors that are located at the rear ends of the end gates are available, as selected by the operator, to provide feedback to control the positions of one of the right and left front lifting columns, as well as the rear lifting column.