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:
Mar. 04, 2014
Filed:
Jun. 29, 2012
Kenichi Takayama, Minamitsuru-gun, JP;
Tadashi Okita, Minamitsuru-gun, JP;
Kenichi Takayama, Minamitsuru-gun, JP;
Tadashi Okita, Minamitsuru-gun, JP;
FANUC Corporation, Minamitsuru-gun, Yamanashi, JP;
Abstract
A tapping machine () executes a tapping operation by operating a spindle motor () and a feed axis motor () in synchronization, and includes a spindle reversal detector unit () for detecting the reversed operation of the spindle during the tapping operation, and a reverse correction amount production unit () for producing a reverse correction amount for improving follow-up performance of reversed operation of the feed axis at the time when the reversed operation of the spindle is detected by the spindle reversal detector unit (). When the reversed operation is detected by the spindle reversal detector unit, the reverse correction amount produced by the reverse correction amount production unit () is added to the speed instruction on a speed control loop of the feed axis control unit () or to an integrator () of the speed control loop.