Abstract: Provided is a welding apparatus having a fume elimination function. The welding apparatus efficiently eliminates fume generated while a welding object is being welded using a laser.

Abstract: An apparatus for removing foreign substances in a container includes a conveying device for conveying a container having an opening portion, and a first nozzle for ejecting a gas toward the opening portion of the container, in which the first nozzle is disposed to be spaced apart from an imaginary vertical surface that runs through a center of the container, towards a first side, at a first spacing distance.

Abstract: Disclosed is a static bearing conveying apparatus having magnetically preloading and motional error correcting functions. The apparatus comprises a guide having a guide surface formed on one side of the guide facing a table, magnetic preload units provided between the guide and the table to generate preload, and a motional error correcting control unit comprising a controller to control the magnetic preload units and a power amplifier to apply electric current according to a control signal from the controller. Each of the magnetic preload units comprises a permanent magnet, a core collinear with magnetic fluxes from the permanent magnet, an electromagnetic coil wound around the core, and a fixing bracket having the permanent magnet supported by the table. The apparatus is simplified in structure of the table and the overall guide, and reduces motional errors of the guide by correcting errors of a floating gap of the static bearings.

Abstract: Disclosed is a static bearing conveying apparatus having magnetically preloading and motional error correcting functions. The apparatus comprises a guide having a guide surface formed on one side of the guide facing a table, magnetic preload units provided between the guide and the table to generate preload, and a motional error correcting control unit comprising a controller to control the magnetic preload units and a power amplifier to apply electric current according to a control signal from the controller. Each of the magnetic preload units comprises a permanent magnet, a core collinear with magnetic fluxes from the permanent magnet, an electromagnetic coil wound around the core, and a fixing bracket having the permanent magnet supported by the table. The apparatus is simplified in structure of the table and the overall guide, and reduces motional errors of the guide by correcting errors of a floating gap of the static bearings.

Abstract: Variable capillary apparatus and motion error compensation method using the same. The apparatus has upper and lower bodies and a leaf spring inserted therebetween. Between a lower center portion of the upper body and the spring, there is formed a capillary having a fine gap. The compensating method has the steps of installing a couple of hydrostatic bearings connected to the variable capillary apparatuses to one side of a table, installing a couple of hydrostatic bearings connected to fixed capillaries to the other side of the table, determining gains of the variable capillary apparatuses, detecting a motion error of the table by moving the table, and applying varying voltages to the variable capillary apparatuses for compensating for the motion error. The apparatus and compensating method compensate for the motion error due to geometrical errors of the table and guide rails by varying the gap of the capillary of the apparatuses.