US 11,752,699 B2
Calibration method and a detection device for a coating unit of an additive manufacturing device
Stefan Gruenberger, Munich (DE); and Stefanie Markl, Munich (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
Filed on Jul. 7, 2020, as Appl. No. 16/922,024.
Claims priority of application No. 102019210125.9 (DE), filed on Jul. 9, 2019.
Prior Publication US 2021/0008806 A1, Jan. 14, 2021
Int. Cl. B29C 64/393 (2017.01); B33Y 30/00 (2015.01); G05B 19/402 (2006.01); B33Y 50/02 (2015.01); B22F 10/31 (2021.01); G01B 21/04 (2006.01); B22F 3/16 (2006.01)
CPC B29C 64/393 (2017.08) [B22F 10/31 (2021.01); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); G01B 21/042 (2013.01); G05B 19/402 (2013.01); B22F 2003/166 (2013.01); G05B 2219/49023 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A calibration method for calibrating a coating unit of an additive manufacturing device using a detection device, wherein the additive manufacturing device is configured to produce a three-dimensional object on a building base by applying a building material layer by layer and selectively solidifying a layer of the building material at locations corresponding to a cross-section of the object to be produced in the layer, wherein, for an application of the layer, the coating unit is moved in at least one direction of movement across a build area of the manufacturing device, wherein the coating unit comprises a first application element and a second application element which are spaced from one another in the at least one direction of movement of the coating unit, and wherein the detection device is configured to detect at least one position reference value of the coating unit with respect to a reference point outside the coating unit and a measuring point assigned to the coating unit, the method comprising at least the steps of:
a) positioning the coating unit in a first measuring position and detecting a first position reference value of the coating unit with respect to the reference point and a first measuring point assigned to the coating unit at the first measuring position;
b) positioning the coating unit in a second measuring position by moving the coating unit in the at least one direction of movement and detecting a second position reference value of the coating unit with respect to the reference point and a second measuring point assigned to the coating unit at the second measuring position; and
c) determining a correction value for a position and/or orientation of the first application element and/or of the second application element, the correction value being determined based on a comparison of the detected first position reference value and the detected second position reference value.