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Gentlemen,
I am getting an odd (to me anyway) vibration on a gearbox. It is a right angle reducer coupled with a fluid coupler. The motor speed: ~1795 CPM, the pinion speed ~1765 CPM. All of the peaks tend to point to the pinion CPM. In the demod spectrum there are small sidebands on the peaks approximate to the intermediate shaft CPM. Could anyone offer an opinion as to what is causing this behavior. None of the other 20 or so boxes that I monitor exhibit anything like this.

This is my first post on the forum, so any advice on protocol or message structure is appreciated.

Thanks in advance.

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