Re: [CAD_CAM_EDM_DRO] Re: Ball screw cost and sources - Moglice - Phillycast - concrete

Hi Stephan;

Sounds similar to ideas I was flirting with.

Originally I discounted the concrete in tube idea due to the shrinkage
issue. I do know that there are expansive concrete mixes used to
groute cracks and stuff, may look into that.

The epoxy and chiped granite idea seems like a good one also. And
like concrete it is used in the manufacture of alsorts of machinery.

Thanks
Dave


Stephan Kotzé wrote:

>Hi guys
>
>I have also been toying with the idea of using a concrete cast reinforced base. A few OEM machine builders use them in their machines, as concrete has excellent vibration absorbing properties, and is used in high speed milling machines. My idea was to use a self levelling screed to give the final flatness. I was planning on using a orbital sander to "tap" the mould during the initial cast to get rid of trapped air bubbles, and during the screed pouring to let gravity along with the tapping action give me a perfectly flat finish, essentially water level.
>
>For the main beams, I was also planning on pouring concrete into the square tubing to stiffen them. Problem is the binding of the concrete to the inside of the tube. I thought of using some studding running through the tube with two endcaps and a couple of bolts to pre-stress the whole unit, the same way pre-stressed concrete flooring slabs are manufactured.
>
>Stephan
>
>
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