Abstract: A vibration analysis method for detecting abnormalities by analyzing a vibration waveform. The method includes the steps of, in a plurality of observation time points {t.sub.j } composed of a number n of specified time points t.sub.j (j=1 to n) counted from a start time point t.sub.0, detecting displacements of a vibration wave f.sub.j (j=1 to n) at the individual time points of the plurality of observation time points, and comparing points in an n-dimensional space composed of the displacements, detected at the individual observation time points, with points in the n-dimensional space of a vibration waveform that are designated as being normal.

Abstract: An electronic parts mounting apparatus includes a plurality of parallel parts feeder units each of which accommodates a plurality of electronic parts and sequentially feeds the electronic parts to a predetermined parts pickup position; the parts feeder units being arranged in parallel so as to form a parts feeding section; a positioning device for positioning a member on which the electronic parts are to be mounted; a parts mounting device which seizes each of the electronic parts at a predetermined position of the parts feeding section and which mounts each of the electronic parts on the member; and a detection device for detecting a distal end of each of the parts feeder units so as to determine whether a particular parts feeder unit deviates from a present position.

Abstract: An electronic component mounting apparatus has a movable table on which plural component supply units are arranged in parallel. Each of the component supply units accommodate an electronic component to be mounted on a component mounting member. A guide frame supports the table to move in a direction intersecting perpendicularly to a component supply direction of the component supply unit. A driving shaft is arranged in the direction intersecting perpendicularly to the component supply direction of the component supply unit for moving the table. A positioning device positions the component mounting member. A component mounting device holds the components and mounts the components on the mounting member, and a support member supports the driving shaft at a middle thereof.

Abstract: A component mounting apparatus which comprises at least first and second component supply assemblies mounted on respective movable tables that are mounted on a common track for movement therealong. The apparatus also comprises at least one positioning device for positioning a printed circuit board on which components are desired to be mounted; at least one component mounting unit for receiving a component at a predetermined position of the component supply assembly and mounting the component onto the support member; and a table moving mechanism which is selectively connectable with one of the first and second movable tables for driving the movable table along the common track.

Abstract: A method of mounting electronic components, comprising steps of: sucking an electronic component by a suction nozzle provided at the tip of a mounting head; holding the sucked electronic component in position by a centering device having an opening and closing mechanism and provided separately from the mounting head, and while holding the component applying adhesive to a side of the electronic component, the side being opposite to that sucked onto the suction nozzle; and mounting the electronic component to a designated position on a printed circuit board. The nozzles on the head are of different sizes.