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:
Jun. 23, 1987
Filed:
Jun. 23, 1982
Mitsuo Matsui, Tokyo, JP;
Teruyuki Matsumura, Hachioji, JP;
Fanuc Limited, Hino, JP;
Abstract
A method and apparatus for controlling an electric discharge machine wherein a motor for establishing relative movement between an energized electrode and a workpiece is driven in accordance to with NC command data. The method includes the steps of converting commanded speed information into a speed command value to control the speed of the motor, counting, by using a counter, pulses generated by a sensor each time the motor rotates by a predetermined amount, reading the value of the count in the counter periodically, adding the read values cumulatively to determine the present position of the electrode, and sending a command to the counter each time its counted value is read, to cancel the counted value.