The main structure is Item 80 by 40 extrusions which are first bolted together and then clad with 8mm ally plate.
The plate has been cut on my large CNC machine so accuracy of bolt positioning is spot on. The ends of the sections have been threaded 8mm and the other holes have sliding nuts in the slot profile. Fixing in the ends and faces ensures the profiles are sitting square and flush to the plates.
First photo shows the frame.
Second and third photos show all the 8mm plates after they have been machined, threaded, counterbored where necessary and de-burred. There was a few nights cutting those.
Fourth photo shows it assembled.
Fifth photo shows the gantry sitting on the rails and one section of t slot table that will be fitted. The gantry beam is a piece of 80 by 80 and a piece of 80 by 40 stitched together with bolts and sliding nuts. Ally plate will clad the beam and have all the linear rail bolt holes threaded in it.
This machine will be a total build from the ground up similar to my last build - Tubot.
http://www.cnczone.com/forums/open_s...8-tubot-2.html
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