I am mulling over a moving table design and am wondering about the benefit vs effort/cost of using 3 rails on a moving table instead of the standard 2.
I have been told it might be a good idea, but would like to hear from someone who has done it. Worth the cost and effort aligning everything?

I assume the offset ball screw would not be a problem.

Also, benefits of using 6 carriages on 3 rails, or even 9 carriages? Crazy, ( I know....)


Machine would be thick RHS steel, brazed together. Table would be 480 x 720 x 16 mm Ali plate. Table would move on long axis.
Steve