US 12,379,719 B2
Method and device for monitoring a milling process
Henning Ochsenfeld, Nuremberg (DE); Thorsten Reimann, Erlangen (DE); and Liam Pettigrew, Petersham (AU)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 17/599,544
Filed by SEIMENS AKTIENGESELLSCHAFT, Munich (DE)
PCT Filed Mar. 24, 2020, PCT No. PCT/EP2020/058069
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/200903, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 19166079 (EP), filed on Mar. 29, 2019.
Prior Publication US 2022/0197273 A1, Jun. 23, 2022
Int. Cl. G05B 23/02 (2006.01); G05B 19/042 (2006.01); G05B 19/4065 (2006.01); G06N 3/08 (2023.01); G06N 3/044 (2023.01)
CPC G05B 23/0283 (2013.01) [G05B 19/0428 (2013.01); G05B 19/4065 (2013.01); G06N 3/08 (2013.01); G05B 2219/34477 (2013.01); G05B 2219/45145 (2013.01); G05B 2219/50185 (2013.01); G06N 3/044 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method for monitoring a milling process of a printed circuit board, the method comprising the steps of:
detecting a rotational speed of a milling head of a milling machine and at least one further operating parameter of the milling machine during the milling process, wherein the further operating parameter is an electrical supply current for operating the milling machine;
detecting, in the case of a constant rotational speed, a current spike of the electrical supply current that is due to mill chippings, wherein the electrical supply current is sampled, such that current spikes as a result of mill chippings are detected;
evaluating the detected rotational speed and the detected at least one further operating parameter by a trained adaptive algorithm for identifying anomalies during the milling process; and
detecting a current spike of the electrical supply current that is due to comminuting of mill chippings, the current spike of the electrical supply current that is due to comminuting of mill chippings having a characterizing progression that is identified by the trained adaptive algorithm.