Hi guys, sorry if this is a FAQ. I am thinking of building a bridge/gantry style mill and I would like to know if I can use fully-supported round rails.
I had planned to just extend the X-axis of my current machine, so I bought some T-slot table, a longer screw and bearings and a pair of 700mm long round fully supported rails and 4 bearing blocks for them.
I am beginning to think though that I could do with some extra Y and Z too, as well as some more spindle power so I am considering using my first machine to help me build my second! Is there any advantage to using those square rails e.g. Hiwin, or should I just buy more of the same http://www.marchantdice.com/linear/SBR/index.htm - which might come in handy if I need to re-arrange things in the future.
Cheers.