new to cnc

Hi There all.

I have a plan to build a cnc machine for pcb prototyping, I do like the this one (see photo) do someone here now how to start to make the aluminium parts, I need the Z axis as start I presume, what do I need of distance the Z axis will do, I want to make the cnc some bigger as needed for pcb because so I can do make some more things with it.

Photo,s I have from ebay, I can buy this complete but then I miss the do it myself learn pad and make it myself I have some freedom to changing things.

thanks

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