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Machine vibration reduction

Machine vibration reduction

Machine vibration reduction

(OP)
I'm building a 20 hp abrasive lab saw.  The frame is 60" x 72", made from 4"x4"x1/4" walled tubing.  A pivoting saw assembly sits on a webbed riser on one corner and weighs 590 pounds - as much as the frame.  I have some vibration in the frame that I would like to minimize the old fashion way through mass. Hypothetically, I could fill the tubing with concrete (very messy but will add stiffness) and more than double the weight.  However, would plain sand accomplish the same thing by absorbing the vibration? I have no vibration analyses.  The spindle and motor are adequatly ballanced. I'm looking for some simple tips in reducing vibration.  
Thanks for your time,
Frank

 

RE: Machine vibration reduction

I like the idea of filling with sand or steel/lead shot; it would definitely absorb a lot of the vibration and noise.  Machine turnings/chips would do as well, but wouldn't pack into the tubes as nicely.

RE: Machine vibration reduction


Hi EvilKraut,

Have you thought about using a dynamic absorber ? Figure out the natural frequency of the system and attach a mass/spring system of the same natural frequency (but a lot smaller) underneath your frame.

Hope this helps

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