Re: [CAD_CAM_EDM_DRO] Re: Al Extrusion Vibration Damping

On 16 Jun 2005, at 19:56, Roger Hampson wrote:

> The problem you are all overlooking is that the aluminium extrusion is
> oscillating by adding oil, water, and soggy teddy bears is not
> going to
> remove the energy in the oscillation.
> The best method is to put a 1/4 wavelength stub at the point of
> maximum
> oscillation, something like a stiff spring a length of stiff wire
> and adjust
> a weight that you can slide up and down the rod, at some point of both
> length and weight the oscillation will stop!!

I think you've got it the wrong way around. Adding a spring won't
remove a significant amount of energy, it'll just alter the resonant
frequency of the system. Adding a damper will absorb energy. I really
don't know how much damping you will get from filling the frame with
water or oil, but soggy teddy bears sound like a good idea to me ;)

--
------------ Alex Holden - http://www.alexholden.net/ ------------
If it doesn't work, you're not hitting it with a big enough hammer