Mild steel box section pricing

[reefy86]

Ah OK I figured that but going from my old drawing I think I had the frame at 4mm and then had the beams that the linear rails and ball screws being attached to at 10mm thick.

[John McNamara]

Re Damping.

This (Excellent) paper may interest you of you are thinking of building a machine and filling steel tubes with damping material. There are practical examples towards the end. Of note is the thin flexible layer between the concrete and the way it is sectioned within the tube in plastic bags in one case, it is not just poured in.

The machine designed in the paper, a tool and cutter grinder was actually commercially built by Star.

https://my.mech.utah.edu/~bamberg/re...mberg-PhD.html

Youtube "edge precision" to see one working.
https://www.youtube.com/watch?v=N2vPng7O5bQ

You can download the paper from MIT
https://dspace.mit.edu/handle/1721.1/88839

Regards
John