Method and device for monitoring a milling process
AssigneeSiemens Aktiengesellschaft
InventorsHenning Ochsenfeld, Thorsten Reimann, Liam Pettigrew
Life of this patent
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Abstract
The invention relates to a method for monitoring a milling process of a printed circuit board, having the steps of: (a) detecting (S1) the rotational speed of a milling head (2) of a milling machine (1) and at least one other operating parameter of the milling machine (1) during the milling process, wherein the other operating parameter is an electric supply current for operating the milling machine, and (b) analyzing (S2) the detected rotational speed and the detected operating parameter using a trained adaptive algorithm for detecting anomalies during the milling process.
Claims18
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.
A milling machine for milling a workpiece, wherein the workpiece is a printed circuit board, the milling machine comprising:
- a rotatable milling head operable to process the workpiece in a milling process, process;
- an electric motor operable to drive the milling head;
- and
- an artificial intelligence module configured to identify, during the milling process, anomalies of the milling process based on a detected rotational speed of the milling head and at least one further operating parameter of the milling machine,
- wherein the further operating parameter is a supply current to the electric motor,
- wherein the intelligence module is further configured to detect, in the case of a constant rotational speed, a current spike of the supply current that is due to mill chippings,
- wherein the supply current is sampled such that the current spikes as a result of mill chippings, which have passed into the milling spindle, are detected, and
- wherein the intelligence module is further configured to detect and identify, using a trained adaptive algorithm, a current spike of the supply current that is due to the comminuting of mill chippings and has a characteristic curve.
Dependencies are inferred from the claim text.