Open source group project, anybody interested?

[Ross77]

Ok I been having thinking about this and was wondering if Aliminium U channel is the answer? The only problem is that it would need welding. Steel would be easier but is quite a bit heavier and seems to cost more at the mo.

The idea is use 2 u channels vertical and the fix one top and bottom. This would provide a channel for the ball screw and should be plenty strong enough for dremel, trim router. but if more strength is required then the top and bottom cavity could be filled with concrete and rebar(could be threaded bar that then bolts the uprights to the beam)

Done a few rough shetches to get an idea, I know theres a few mistakes and will probably need some bracing in the webs of the channel (more welding) and the x axis is probably overkill........

Any imediate or obvious problems before I go any further? 100x 50 ali is about £10 a meter so with the 4 bars on an 800mm y axis it would be £30 ish