Quote Originally Posted by irving2008 View Post
Assuming those rods are about 500mm between end supports (based on pic 0068 and the size of the platter) the deflection in the centre is around 2um (2 x 1e-6m) per kg

Won't bow as much as you think because the supports are fixed not simple.

I'd guess that table weighs 25 - 30kg with the slide mounted - so deflection <0.1mm in the middle...
Thanks Irving, I was thinking 900+ (based on ruler in pic 0263) and 40-60kgs! The other thing that has thrown me is the feet are not secured to the base...

Seem to recall seeing a spreadsheet somewhere that someone did for unsupported rail, was it yours?... (of course I cant find it!)