Mitutoyo Corporation

Kotaro Hirano

Sadayuki Matsumiya

Koichi Komatsu

Yoshiyuki Omori

Fumihiro Takemura

Yasushi Fukumoto

Sadaharu Arita

Shigeru Ohtani

Kenji Iwamoto

Masanori Arai

Hisayoshi Sakai

Nobuyuki Hama

Hideki Shindo

Naoki Izumi

Ryousuke Watanabe

Hirofumi Kakiuchi

There is provided a method for controlling a surface texture measuring apparatus equipped with a probe that cannot detect an edge portion so as to automatically perform edge detection and automatically set a workpiece coordinate system. Accordingly, it is possible to reduce discrepancies by individual operators when setting a coordinate system, and improve the workability of coordinate system setting. A surface to be measured is scanned with a probe along a preset preliminary measurement path. When a detection error which causes when the surface to be measured is out of the tracking range of the probe occurs, a measurement value immediately before the detection error has occurred is temporarily registered as a temporary edge point. When the detection error continues during the subsequent scanning for a predetermined distance along the preliminary measurement path, the temporarily registered temporary edge point is set to an edge point.

Method for controlling surface texture measuring apparatus

A method of placing a work piece on a measuring device in which a work piece is placed on a table of a measuring device is provided. The method includes: using a retainer capable of holding the work piece above the table and a lifting/lowering device lifting and lowering a top surface of the table; holding the work piece above the table with the retainer; lifting the top surface of the table with the lifting/lowering device to bring the top surface of the table into contact with a bottom surface of the work piece; and, after a load of the work piece is borne by the table, releasing the hold of the retainer on the work piece.

Method of placing work piece on table of measuring device

A positioning unit includes two or more the laser light sources disposed around a point sensor. Laser light beams from the two or more the laser light sources intersect at an adjustment point separated from a detection point, which is away from the point sensor, by a predetermined distance. The adjustment point is positioned on a desired measurement start point on a work, the point sensor is moved close to the work by the predetermined distance, and a measurement scan of the work is started.

Shape measuring apparatus and point sensor positioning unit

A surface roughness measuring unit according to the present invention includes a contact pin unit having a contact pin and a displacement detector, the contact pin being provided so as to project and retract through a through-hole of a skid and scanning and moving along a surface of a work piece, the displacement detector detecting displacement of the contact pin in a direction perpendicular to the work piece surface; a driver moving the contact pin unit forward and backward along the surface of the work piece; and a joint coupling the contact pin unit and the driver to a measurement head holder of a coordinate measuring system. The surface roughness measuring unit further includes a contact detector that detects contact of the skid on the surface of the work piece.

Surface roughness measuring unit and coordinate measuring apparatus

An offset amount calibrating method that obtains the offset amount between a contact-type detector and an image probe for a surface profile measuring machine is provided. The method includes: setting on a stage a calibration jig that has a surface being provided with a lattice pattern with a level difference; measuring the lattice pattern of the calibration jig by the contact-type detector to obtain a first reference position of the lattice pattern; capturing the image of the lattice pattern of the calibration jig by the image probe to obtain a second reference position of the lattice pattern; and obtaining the offset amount from a difference between the first and second reference positions.

Offset amount calibrating method and surface profile measuring machine

A surface texture measuring machine includes: a stage, a contact-type detector having a stylus, an image probe, a relative movement mechanism and a controller. The controller includes: a center position calculating unit that, when the image probe enters position data of at least three points on a circular contour of a circular concave portion or a circular convex portion of an object, approximates the entered position data to a circle to obtain a center position of the circle; and a stylus setting unit that, after calculating the center position, operates the relative movement mechanism to position the stylus of the contact-type detector at the center position.

Surface texture measuring machine and a surface texture measuring method

Surface-roughness measuring probe

A jig for measuring an object shape includes a plate having a first surface and a second surface opposed to the first plate and two reference balls fixed to the plate, each ball surface being exposed on both the first and second surfaces. A reference plane is fixed to the plate, the reference plane having a first plane and a second plane that are parallel to each other, the first and second planes being exposed on the first and second surfaces of the plate, respectively. An object-holding portion is fixed to the plate, the object-holding portion having a hole passing through the plate, the object-holding portion being able to hold an object in the hole with the front and back surfaces of the object being exposed on the first and second surfaces of the plate, respectively.

Growing community of inventors

Kure, Japan

Kotaro Hirano