Monitoring method and monitor apparatus for monitoring rotation speed of rotary shaft in machine tool, and machine tool

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United States of America Patent

PATENT NO 9122268
APP PUB NO 20130073251A1
SERIAL NO

13459759

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Abstract

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When a rotation speed is fluctuated, a fluctuation diagram showing the relationship between a fluctuation amplitude and a fluctuation period of the rotation speed is displayed on a monitor. In addition to a current setting value, a settable range of the fluctuation amplitude and the fluctuation period is displayed on the fluctuation diagram. At least one of an optimal fluctuation period PO based on Equation (1) below and an optimal range Pl of the fluctuation period based on Equation (2) below is also displayed on the fluctuation diagram, wherein T is a rotation period of a rotary shaft, and a, amin, amax are preset coefficients.

description='In-line Formulae' end='lead'PO=aT  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'aminT≦P1≦amaxT  (2)description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
OKUMA CORPORATION5-25-1 SHIMO-OGUCHI OGUCHI-CHO NIWA-GUN AICHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishii, Hajimu Niwa-Gun, JP 4 39
Nishimura, Kohei Niwa-Gun, JP 14 54
Yoshino, Kiyoshi Niwa-Gun, JP 75 741

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