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1. (WO2017157475) MONITORING DELIVERY OF BUILD MATERIAL IN ADDITIVE MANUFACTURING SYSTEMS

Pub. No.:    WO/2017/157475    International Application No.:    PCT/EP2016/056055
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Sat Mar 19 00:59:59 CET 2016
IPC: B29C 31/02
B33Y 30/00
B33Y 40/00
B29C 67/00
Applicants: HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.
Inventors: VILAJOSANA, Xavier
CORTES, Sebastia
DOMINGUEZ, Pablo
Title: MONITORING DELIVERY OF BUILD MATERIAL IN ADDITIVE MANUFACTURING SYSTEMS
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.