Idea/Suggestion: Bed Attachment to reduce warping  

Idea/Suggestion: Bed Attachment to reduce warping

I've had a warped bed in the past, so bad that Prusa replaced it for free. Maybe it came that way and this isn't a wide spread problem for the community or it is. I'd be interested to hear more from the community on this. But in the big picture, a machine like this printing at extremely small z axis increments, bed warping is obviously the enemy. They even use mesh bed leveling to try and work around it....but why not design a better physical mounting to address the root problem instead?

As a wood worker, I've experienced, and hence design joints around, expansion and contraction. Gluing a panel into frame rails, you don't glue the entire panel to the frame rail because it won't allow for expansion and contraction of the wood due to moisture (humidity) changes, and the panel will crack. Instead you place some glue in the middle and let the rest float.

This had me thinking, why is the heat bed firmly affixed to the bed frame so as to not allow expansion and contraction due to heating changes. It is a heated bed after all, so we know there will be drastic changes in temperature as a part of normal use. The fixed bed frame, which is remaining a constant temperature, will try to keep the bed at the same size when the bed itself is fighting to expand and contract.

To address this root problem of bed warping, you could have a fixed center mount or 2 (to reduce twisting....even 4, but narrowly spaced). Then have the outer mounting points be sliding types that don't allow Z axis movement but do allow X and Y axis movement.

Thoughts?