公开(公告)号：US20190091932A1

公开(公告)日：2019-03-28

申请号：US16085478

申请日：2016-03-18

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Xavier Vilajosana ,  Sebastia Cortes ,  Pablo Dominguez

IPC: B29C64/343 ,  B29C64/165 ,  B29C64/321 ,  B29C64/245 ,  B29C64/209

Abstract: Measures for use in an additive manufacturing system. The temperature of at least one build material delivery hole in a printbed area of the system is measured. An emissivity of the at least one build material delivery hole is compared with a known emissivity of a build material being used in additive manufacturing by the system at the measured temperature. In response to the comparison indicating a difference in emissivity, it is determined that at least a portion of the at least one build material delivery hole is not covered by build material.

公开(公告)号：US20190099954A1

公开(公告)日：2019-04-04

申请号：US16085492

申请日：2016-03-18

Applicant: Xavier Vilajosana ,  Sebastia Cortes ,  Pablo Dominguez ,  Diego Javier Mostaccio ,  Alejandro Manuel de Pena ,  HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Xavier Vilajosana ,  Sebastia Cortes ,  Pablo Dominguez ,  Diego Javier Mostaccio ,  Alejandro Manuel de Pena

IPC: B29C64/393 ,  B29C64/165

Abstract: Measures for use in an additive manufacturing system. A thermal camera measures temperatures of a printbed area of the system at a first time and a second, subsequent time during additive manufacture of an object in the printbed area. A controller receives, from the thermal camera, temperature information associated with the measured temperatures at the first time and the second time and processes the received temperature information to determine a first position of a moving part of the system at the first time and a second position of the moving part at the second time. In response to the processing indicating that the moving part has not moved by a sufficient amount between the first time and the second time, the controller determines that the moving part is operating abnormally.