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equipment vibration

Office Building Window Vibration

An office building had an open atrium that went from ground level up to the roof. In the center of the atrium was a large flowing fountain. Surrounding the fountain were meeting rooms. Each meeting room had a large plate glass window approximately 8 feet tall and 12 feet wide through which the individuals in the meeting room could view the fountain. The problem was that these large plate glass windows had high levels of vibration. The frequency of the vibration was 240 cycles/minute. The floors and walls were all tested and no significant level of the 240 cpm vibration was [...]

Office Building Window Vibration2023-03-13T10:34:23-04:00

Vibration Of Microscope In Microsurgery Room

Equipment: A microscope mounted from the ceiling of a surgery room. The special microscope was used by the surgeon during micro-surgery operations which involved replanting severed fingers and toes. Symptoms: The chief surgeon complained that the image was jittery and that it was very tiring to operate under those conditions, particularly when the scope was set for its maximum magnification. Test Data and Observations: The scope was set to its greatest magnification and printed material was placed on the operating table. Vibration was clearly noticeable, just as the surgeon had indicated. Vibration spectra were taken on both the table and the [...]

Vibration Of Microscope In Microsurgery Room2019-09-09T17:18:50-04:00

Loose Motor Bases: Motor Vibration (A Simple Solution)

When analyzing motors, it is easy to read more into a problem than actually exists. This case history illustrates the need to always look for the simple solution first. While at a power plant working on a large fan, the vibration analyst requested that a large mill motor be examined. The motor had been sent out to motor shops twice. In each instance, the vibration remained high when the motor was put back into operation. Attempts were made to field balance the motor, however, they were unsuccessful. The motor continued to have amplitudes of 8 mils of vibration, all of which [...]

Loose Motor Bases: Motor Vibration (A Simple Solution)2019-09-09T18:02:12-04:00

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