US 11,745,430 B2
Calibration method and build unit
Pau Martin, Sant Cugat del Valles (ES); Francesc Salas Roura, Sant Cugat del Valles (ES); Anna Torrent, Sant Cugat del Valles (ES); and Marius Valles, Sant Cugat del Valles (ES)
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Appl. No. 16/94,272
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Houston, TX (US)
PCT Filed May 12, 2016, PCT No. PCT/EP2016/060657
§ 371(c)(1), (2) Date Oct. 17, 2018,
PCT Pub. No. WO2017/194110, PCT Pub. Date Nov. 16, 2017.
Prior Publication US 2019/0111628 A1, Apr. 18, 2019
Int. Cl. B29C 64/393 (2017.01); B29C 64/386 (2017.01); B33Y 50/00 (2015.01); B29C 64/245 (2017.01); B29C 64/241 (2017.01); G06F 1/03 (2006.01); G06F 17/18 (2006.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/393 (2017.08) [B29C 64/241 (2017.08); B29C 64/245 (2017.08); B29C 64/386 (2017.08); B33Y 50/00 (2014.12); G06F 1/03 (2013.01); G06F 17/18 (2013.01); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 16 Claims
OG exemplary drawing
 
1. A method of operating an additive manufacturing device including calibrating movement of a platform on which objects are formed by the additive manufacturing device, the method comprising:
in a calibration run, causing movement of the platform, wherein causing movement of the platform causes the platform to move in a vertical direction in a build unit; and wherein causing movement of the platform causes the platform to move in first increments, each first increment corresponding to a nominal layer thickness of a print medium to be deposited in a 3D print job, and detecting a plurality of positions comprises detecting vertical positions of the platform at a defined plurality of said first increments;
detecting a plurality of positions of the platform during the movement;
deriving a movement pattern from the plurality of positions, wherein deriving the movement pattern comprises deriving an expression of the plurality of positions, the expression including a sinusoidal term; and
determining an adjustment of the movement of the platform based on the movement pattern.