There are many ways to do just about everything and sanding tube is no different.
One of the more common tasks I am asked about day to day is dealing with round tube. There is so much of it used in all manner of products its seems near every one has to deal with it in some way or to some extent. It can be a simple process or as complex as putting together that build it yourself furniture we all love.
A question I get often is robot vs CNC for finishing work. While there is not a clear yes or no type answer there are a few points that can help to guide the person faced with the question.
One of the tasks that tends to be problematic is the OD finishing of tube material. From hand finishing to placing tubes in a lathe there are all manner of ways people try to work with tubes. In reality there is a much more simple and fast way to do it that it seems many are not aware of. There is the centerless style of machine most have seen where the tube spins while being processed. Many are not fans of these due to the risks of the spinning tube. If there is a bend to the material the tube can flail around and get out of control. They also tend to be aggressive in a general sense as far as material removal. If you have nasty rust covered material with severe pits they would be the best option.
Planetary tube grinding machines do not spin the tubes during the process, which creates a safe operator environment and eliminates the possibility of barber poling.