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Posted by D Sherman [72.47.153.24] on Wednesday, March 14, 2012 at 00:37:44 :
In Reply to: Re: if push came to shove--ot---on topic posted by clueless [201.197.162.212] on Tuesday, March 13, 2012 at 17:13:17 :
If you're fab'ing a whole new setup, that problem has already been solved many times. Look in any good industrial supply catalog and there will be a whole section of vibration-isolation mounts. It's also not too hard to make something of your own so long as you keep in mind that there must never be metal-to-metal contact through the mount. Putting a sheet of rubber between the two parts, with bolt through the whole thing doesn't work because the bolt is touching both parts. Also, if the rubber is too stiff or you tighten it down too much, you lose the damping. You'll notice that properly-designed mounts are set up so that no matter how tight you tighten the bolt, you're not compressing the rubber that provides the actual isolation. You generally do not want a vibration mount made out of a steel spring (rather than rubber) unless you know for a fact that the resonant frequency of the mass-spring combination will never be near any normal operating vibration frequency, otherwise it will vibrate like crazy at the resonant frequency.