Quote Originally Posted by m_c View Post
Of course, that depends on how you plan on mounting each rail in relation to the ballscrew.
I don't follow that last sentence?

I'm using supported round rail, with the supported surface mounted flat on the bed.

Just realised I should also include the additional load on the bearings from the gantry accelerating. Need to know the where center of mass of the gantry is for that...can get it from the CAD model I suppose. Might be taking it too far!