公开(公告)号：US20200276764A1

公开(公告)日：2020-09-03

申请号：US16289076

申请日：2019-02-28

Applicant: General Electric Company

Inventor： Brian Scott MCCARTHY ,  Dean Andrew SNELLING, JR. ,  Thomas ADCOCK ,  Donnell CREAR ,  Michael Evans GRAHAM

IPC: B29C64/393 ,  B22F3/105 ,  B29C64/153 ,  B29C64/268

Abstract: A system for additive manufacturing machine energy beam alignment error compensation includes, a calibration table having x-y planar offsets to correct laser alignment errors representing energy beam positional offsets between beam-steering commanded energy beam locations and fiducial marks generated on a burn-paper, a recoater mechanism that distributes successive layers of powder, one or more sensors monitoring the powderbed surface proximal to the beam scan unit, and a processor unit configured to perform a method. The method including collecting sensor data representing height variations across at least a portion of the powderbed surface, deriving dimensional data from the collected data, analyzing the dimensional data to determine a distribution of differences between the powderbed surface and a reference plane containing the burn-paper when the fiducial marks were generated, and calculating z-axis calibration offset points for inclusion in the calibration table x-y planar offsets. A method and a non-transitory medium are also disclosed.