[CAD_CAM_EDM_DRO] Re: Shaft balancing

On 2 November 2011 02:14, Steve Blackmore <steve@...> wrote:

> **
>
>
> On Tue, 1 Nov 2011 20:40:32 +0200, you wrote:
>
> >Thing is, I want to be able to balance in selected planes, with add or
> >subtract. I'm after something like this, but not wanting to spend $000's;
> >
> >http://www.dynamic-balancing.com/software.htm
> >
> >I want to be able to balance small spindles to 30 000 or so, to mg
> >resolution, using accelerometers and some PC interface I/O. I can do all
> >the hardware, but the software is troublesome..
>
> Hi Roland, I've balanced a few turbine shafts that rotate to 150K rpm on
> a home built balancer. I've still got the bits somewhere. All it
> consisted of was two nylon yokes that held the ceramic bearings on the
> shaft, the yokes were slotted onto thin nylon sheet which allowed the
> whole assembly to flex. On these were glued transducers and the output
> into a two channel o'scope. This was mounted onto a solid base. The
> shaft assembly was driven by a rubber band to a small electric motor
> with a flat pulley on the shaft.
>
> Here's a "posh" version of my balancer <G>
>
>
> http://www.technologie-entwicklung.de/Gasturbines/Balancing_Tool/balancing_tool.html
>
> Details on how to use a 'scope for balancing are here
>
>
> http://www.tek.com/Measurement/cgi-bin/framed.pl?Document=/Measurement/App_Notes/interpmeas/&FrameSet=oscilloscopes
>
> no software needed :)
>
> Steve Blackmore
> --
>
> __._,_._
>

Thanks Steve. Looks quite interesting. I suppose I should build and
experiment rather than let my imagination run wild on complexities. As ones
understanding increases, the instrumentation required usually simplifies...

Regards
Roland


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