Mitutoyo Corporation

Tomohiro Usui

Yo Terashita

Takashi Noda

Hiroshi Kamitani

Kazumi Mizukami

Hideki Kumagai

Takashi Majima

A control apparatus having high control performance is provided. A control apparatus according to an aspect of the present invention is a control apparatus that controls a DC motor, including a first current detection system that detects a current value of the DC motor, a second current detection system that detects a current value of the DC motor, and a control unit that controls the DC motor based on a signal indicating a current value input from the first or second current detection system, in which the second current detection system includes an amplifier.

Control apparatus, control method, and computer readable medium

A form measuring apparatus includes a probe for measuring a measured object; a rotary table on which the measured object is placed; and a coordinate system calculator calculating coordinate axes configuring a coordinate system for the rotary table. The coordinate system calculator calculates, based on a position of a master ball fixated to the rotary table, a center of a circle traced by the master ball when the rotary table is rotated; calculates a rotary table coordinate system having the center of the circle as an origin point; and corrects coordinates of the origin point based on a calibrated diameter value of a gauge fixated to the rotary table, a first diameter value of the gauge measured by a first measurement in which the probe approaches the gauge in a first direction, and a second diameter value of the gauge measured by a second measurement.

Form measuring apparatus and method of registering coordinate system for rotary table

A control apparatus for controllably driving a drive mechanism which displaces a movable member, includes: an electric-current detecting unit configured to detect electric current for driving the drive mechanism; a speed control unit configured to set a target electric-current according to a drive speed at which the drive mechanism is caused to drive the movable member; and an electric-current control unit configured to multiply, by an integral gain and a proportional gain, an electric-current deviation between a target electric-current and a detection electric-current detected by the electric-current detecting unit to set output electric-current to be output to the drive mechanism, wherein the current control unit changes at least one of the integral gain and the proportional gain according to the drive speed of the drive mechanism.

Control apparatus and measuring apparatus

According to the present invention, a three-dimensional measuring instrument includes a spindle that moves an object to be controlled in a predetermined axis direction; and a controlling device that controls a position of the object to be controlled by controlling a position of the spindle. The three-dimensional measuring instrument further includes an absolute-type linear encoder that outputs an absolute position of the spindle. With this, it is possible to start measurement by the three-dimensional measuring instrument in a short period of time.

Three-dimensional measuring instrument

A coordinate measuring machine includes: a probe for measuring an object; a movement mechanism for moving the probe; and a motion controller for controlling the movement mechanism. The motion controller includes: a current value detecting unit that detects a current value for moving the probe by the movement mechanism; and a load judging unit that judges a status of a load applied on the movement mechanism based on the current value detected by the current value detecting unit and a threshold that is set in accordance with a target speed for moving the probe by the movement mechanism. The target speed is in proportion to the threshold.

Growing community of inventors

Utsunomiya, Japan

Tomohiro Usui