Thk Co., Ltd.

Nec Tokin Corporation

Honda Electron Co., Ltd.

Toshiro Tojo

Kaoru Hoshide

Yuki Nomura

Toshiyuki Aso

Akihiro Unno

Ryuji Furusawa

Yoshiyuki Honjo

Ayako Miyajima

Shuhei Yamanaka

Kazuo Shoda

Toshiya Sato

Fumishiro Tsuda

Takashi Kaku

Toyomi Obikawa

Hideaki Yamauchi

Masahiko Kunii

Provided is a diagnosis method of appropriately recognizing a state of a rolling surface of a track member of a rolling guide device or a lubrication state of rolling elements using a sensor mounted to the rolling guide device. The diagnosis method is applied to a rolling guide device including: a track member having a rolling surface extending along a longitudinal direction of the track member; and a moving member, which is assembled to the track member through intermediation of a plurality of rolling elements configured to roll on the rolling surface so that the moving member is movable along the track member, and has an endless circulation path for the rolling elements. The diagnosis method includes: detecting a moving speed of the moving member relative to the track member while detecting relative vibration displacement of the moving member relative to the track member using a vibration sensor mounted to the moving member; and diagnosing a running state of the moving member relative to the track member based on those detection results.

Method for diagnosing state of rolling guide device

Provided is a rolling guide device which is capable of directly recognizing an operation condition of a moving member with respect to a track member or a circulation state of rolling elements in an endless circulation path, the rolling guide device including: a track member having a rolling surface; and a moving member, which is assembled to the track member through intermediation of a large number of rolling elements which roll on the rolling surface, and has an endless circulation path for the rolling elements, the moving member including: a main body member having a load rolling surface and a no-load return path for the rolling elements, the load rolling surface being opposed to the rolling surface of the track member to define a load path for the rolling elements, a pair of covers, which have direction change paths for allowing the rolling elements to move between the load path and the no-load return path, and is mounted to the main body member; and a measurement plate, which is interposed at least between the main body member and one cover to form part of the endless circulation path, and has a mounting portion for a sensor configured to detect an operation condition of the moving member with respect to the track member.

Rolling guide device

A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motoris a linear motor in which a stator and a movable member are relatively movable, wherein the stator and the movable member respectively have periodic structures in which plural kinds of poles of the stator and the movable member () () which magnetically act each other and arranged periodically subsequently in an order according to the arrangement in a direction of the relative motion therebetween; a plurality of stators are arranged in a distributed manner in the direction of the relative motion; a distance D, Dbetween adjacent stators is not more than a length Lmv of the movable member; the pole of the stator is formed of a coil; and a current control unit that controls current to be supplied to the coil based on the distance between the stators is provided.

Distributed-arrangement linear motor and control method of distributed-arrangement linear motor

A position detection system includes a linear motor having a rod in which magnetic poles of N pole and S pole are arranged alternately in an axial direction and a plurality of coils surrounding the rod a magnetic sensor for detecting change in the direction of the magnetic field of the rod caused by linear movement of the rod relative to the coils to output a sine wave signal and a cosine wave signal which are 90&#xb0; phase shifted with respect to one another, and a position detecting circuit for detecting a position of the rod relative to the coils. As the magnetic sensor detects the change in the direction of the magnetic field of the rod, the sine wave signal and the cosine wave signal output from the magnetic sensor hardly vary even when the distance between the rod and the magnetic sensor is changed.

Linear motor position detection system

A linear motor is provided with a stator, a slider disposed to be movable relatively with respect to the stator with a gap, and a non-magnetic plate mounted to either one of the stator and the slider so as to define the gap between the stator and the slider.

Linear motor having a slidable element

A modem coupling circuit comprising: (a) a transformerhaving a coreincluding a gap formed therein, primary windings N, Nconstituting a bifilar wound coil which is wound around the core, forming a single layer and connected to power lines L, L, and a secondary winding Nconnected to a transmitting circuitand a secondary winding Nconnected to a receiving circuit, the secondary windings N, Nholding the single layer of the primary windings between; (b) a coupling capacitor Cconnected to a middle point between first ends of the primary windings, the first ends being not connected to the power lines L, L; (c) current limiting resistances R, Rconnected to the primary windings N, Nhaving a bifilar construction; (d) drive resistances R, Rconnected to the secondary winding for transmission N; and (e) terminating resistances R, Rconnected to the secondary winding for reception N

Modem coupling circuit for power-line carrier

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Tokyo, Japan

Toshiro Tojo