Patent ID: 11865616
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. A computer readable medium having processor executable instructions to, while decaking a green part printed with a powder based 3D printer:
repeatedly photograph the green part and compare a pattern of light intensity in the photographs to a reference pattern until the pattern in a photograph matches the reference pattern;
modulate or stop decaking the green part; and
determine whether a detected pattern of light intensity matches the reference pattern by one or more of:
identifying more darker regions and fewer brighter regions in a pattern of a decaked green part compared to a pattern of caked green part;
identifying less darker regions and more brighter regions in a pattern of the decaked green part compared to the pattern of the caked green part; or
counting an increasing number of holes visible in the photographs.