Gmc Hillstone Co., Ltd.

Murata Machinery, Ltd.

Dai Nippon Printing Co., Ltd.

Junji Kido

Noritaka Ishiyama

Takuya Okada

Daigo Aoki

Norikatsu Nakamura

The present invention provides a linear motor device that can reduce a variation in thrust caused by a variation in attractive force. The linear motor device includes a linear motorand a control sectionthat controls the linear motor. The linear motorincludes a magnet membercomposed of permanent magnets having respective N poles and S poles alternately arranged in an axial direction, and a coil memberwhich is located orthogonally to the axial direction with respect to the magnet memberand through which the magnet memberis movable in the axial direction relative to the coil member. The control sectioncontrols current conducted through the coil memberso that a moving one of the magnet memberand the coil memberreciprocates within a use range L corresponding to a part of a pitch p between the magnetic poles N and S in the magnet member

Linear motor device and machine tool having the same mounted thereon

The present invention provides a linear motorthat can prevent a magnet memberfrom falling down when a power supply is turned off. A linear motorincludes a magnet membercomposed of permanent magnets having alternately arranged respective N poles and S poles and a coil memberwhich surrounds a periphery of the magnet memberand trough which the magnet memberis movable in an axial direction relative to the coil member. A magnetic substanceis provided in the vicinity of one end of the coil memberto allow the magnet memberto exert a magnetic attractive force.

Linear motor and machine tool having the same mounted thereon

A coating apparatusincludes a base, a substrate support stage unitmounted on the baseand capable of fixedly supporting a substrate, a coating unitmounted on the baseand capable of discharging a coating material onto a substratefixedly supported on the substrate support stage unit, and a motor unitfor driving at least either the substrate support stage unitor the coating unitfor sliding on the base. The motor unithas a stator assemblyon the base. The stator assemblyincludes a plurality of magnetslinearly arranged such that opposite magnetic polarities of the magnets alternately change, and a pair of magnet holding membersandfor linearly pressing the magnetstogether from both the ends of the magnets.

Growing community of inventors

Mogami-machi, Japan

Noritaka Ishiyama