After thinking that welding all the beams together, according to the previews plans i would have issues with the big weight, i decided to split the contruction into two , the bench and the CNC that will sit on that bench.
So i introduce the CNC pictures first
So i have the main frame
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Then with the red color is the cutting table made by 80X80X5 beam
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over the cutting table i will put aluminium profile tha will be bolted on the red cutting table. That profile has T slot for clamping item that will be cutted
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And here we have some picures of the construction with all the items together
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if i want more depth for 3d cuts i will remove the cutting table(80mm) with the T slot( nearly 40mm) and i will put a 20mm mdf. That will give me about 100mm (80+40-20) more depth

I am waitting for your comments

Thanks

Vagelis