The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2016
Filed:
Aug. 03, 2012
Masakazu Sagasaki, Tokyo, JP;
Toru Takeyama, Tokyo, JP;
Masakazu Sagasaki, Tokyo, JP;
Toru Takeyama, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To avoid overheating of a spindle motor as easy as possible, a numerical control apparatus measures a cycle time in machining a work (step S), measures a current amount per unit cycle flowing to the spindle motor (steps Sand step S), calculates, on the basis of the measured current amount per unit cycle, a duty cycle time in which suppression of the occurrence of overheating of the spindle motor is guaranteed (step S), determines on the basis of a comparison of the duty cycle time and the cycle time whether the spindle motor overheats (step S), and, when the spindle motor overheats (Yes at step S), delays a start of the next cycle by a wait time setting value Tw obtained by subtracting the cycle time from the duty cycle time (step S, No at step S, and step S).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile