公开(公告)号：US20220297231A1

公开(公告)日：2022-09-22

申请号：US17806285

申请日：2022-06-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi NISHIO ,  Manabu NISHIHARA ,  Takamichi KOMATSU

IPC: B23K26/06 ,  B23K26/70 ,  H01S5/0683 ,  H01S5/068 ,  H01S5/062

Abstract: The control unit executes: a first execution step of executing a processing program to set a target value to a value defined by a processing program and performing feedback control on a driving current of a laser oscillator; a detection step of detecting an output fluctuation during execution of the first execution step; a specification step of specifying a physical quantity for which a measured value within a predetermined monitoring time before an occurrence timing of the output fluctuation does not satisfy a predetermined condition as an abnormal physical quantity from a plurality of physical quantities measured during execution of the first execution step; and a program update step of detecting appearance of a predetermined feature in an abnormal physical quantity as a fluctuation factor during execution of a post-update processing program, and updating the processing program to correct the driving current to reduce a difference between the laser output power and the target value compared with when the output fluctuation occurs in the first execution step after detection of the fluctuation factor.