US 12,290,878 B2
Characterization method and system for a laser processing machine with a moving sheet or web
Philippe Guglielmetti, Crissier (CH); and Paul Piron, Crissier (CH)
Assigned to BOBST MEX SA, Mex (CH)
Appl. No. 17/593,320
Filed by BOBST MEX SA, Mex (CH)
PCT Filed Mar. 18, 2020, PCT No. PCT/EP2020/025135
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/187453, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19020135 (EP), filed on Mar. 20, 2019.
Prior Publication US 2022/0176493 A1, Jun. 9, 2022
Int. Cl. B23K 26/30 (2014.01); B23K 26/03 (2006.01); B23K 26/04 (2014.01); B23K 26/08 (2014.01); B23K 26/082 (2014.01); B23K 26/352 (2014.01); B23K 101/16 (2006.01); B23K 101/18 (2006.01)
CPC B23K 26/355 (2018.08) [B23K 26/032 (2013.01); B23K 26/04 (2013.01); B23K 26/082 (2015.10); B23K 26/0846 (2013.01); B23K 2101/16 (2018.08); B23K 2101/18 (2018.08)] 12 Claims
OG exemplary drawing
 
1. A characterization method, for characterizing a laser processing machine having a working area and a laser system configured to direct a laser beam in any location of the working area to process a medium, the characterization method comprising:
moving the medium along a height of the working area using a conveyor system of the laser processing machine;
processing a set of marks on the medium with the laser system of the machine according to a set of nominal locations in the working area;
synchronizing the conveyor system with a location of the laser beam to spread the marks on the medium, wherein each mark can be respectively associated with a processing location in the working area where the mark was processed; and
recording each individual mark on the medium using a camera,
wherein the set of marks is located in a rectangular area of the medium having a surface smaller than a surface of a smallest rectangular area covering a set of the processing locations in the working area, and
wherein the marks are grouped into clusters, each cluster covering an area of the medium small enough to be captured by a two-dimensional camera with a single picture and wherein the processing locations of the marks within a cluster span of at least half of a height of the smallest rectangular area covering the set of the processing locations in the working area.