Quote Originally Posted by NordicCnc View Post
My machine that I currently have is 1000mm long as well. That one is buily from steel, welded 50x50x3. I will probably not be able to mill the surfaces of my new machine with my existing one, since it is not rigid enough for effective steel milling.

As for the connections, those are really strong and requires absolutely 0 machining, which is why I like them. What is it about them that you dont like? How accurate are angles and where can I get those cheap?

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I buy angles, plates and profiles from Motedis, bolts and nuts 100% from China, sometimes angles and plates from China too. there is another supplier from Germany that can ship long profiles and screws

You can weld the base and epoxy level it, or shim directly the rails or use smaller and cheaper aluminum profile on top / AY/ and shim profile, all rest from aluminum

Aluminum profile may be perfectly straight or maybe not, whatever the case for a properly made machine you will need a straight edge as long as your X/gantry and at least 2 precision squares. there is no way one to make a good machine without that.