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US 11,079,741 B2Granted
Numerical controller
AssigneeFanuc Corporation
InventorKousuke Uno
Life of this patent
Estimating the term…
Abstract
A numerical controller outputs a feature amount of time-series data generated in relation to machining. The numerical controller is provided with a data acquisition unit configured to acquire the time-series data from a sensor, a feature amount calculation unit configured to sort the time-series data by their values, extract a set of the time-series data with variations of the values not higher than a predetermined threshold, and calculate the feature amount representative of the set, and a feature amount output unit configured to output the feature amount.
Claims4
A numerical controller comprising:
- a processor configured to:
- control a spindle of a machine tool to machine a workpiece;
- acquire time-series data of spindle load from a sensor, the time-series data having an order according to a time in which the time-series data is output by the sensor;
- create a sorted time-series data by sorting the time-series data in increasing numerical order or decreasing numerical order according to respective magnitudes of numerical values of the time-series data;
- compute differential values between the magnitudes of adjacent data points in the sorted time-series data;
- extract a stable set of the sorted time-series data corresponding to the differential values less than a predetermined threshold;
- calculate a feature amount representative of the extracted stable set, the feature amount indicating a spindle load value;
- and
- output the feature amount for use in adjusting operation of the machine tool based on the calculated spindle load value.
6 more elements
A numerical controller comprising:
- a processor configured to:
- control a spindle of a machine tool to machine a workpiece;
- acquire time-series data of spindle load from a sensor;
- count a frequency of occurrence for each numerical value in the time-series data, the frequency of occurrence for each numerical value is a total number of occurrences for each numerical value in the time-series data;
- extract a set of the time-series data corresponding to the numerical values with the frequency of occurrence greater than a predetermined threshold;
- calculate a feature amount representative of the extracted set, the feature amount indicating a spindle load value;
- and
- output the feature amount for use in adjusting operation of the machine tool based on the calculated spindle load value.
5 more elements
Dependencies are inferred from the claim text.