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petterg
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- TL;DR Summary
- What is the most lightweight structure you can add to a rectangular board to improve the rotational stiffness?
I'm 3d-printing a part that is 110mm x 40mm (XY-plane). I have to keep it light weight, so I made it thin - 0.6mm (Z direction) and filled the surface with holes to remove as much weight as possible. Then I added a grid of 2,5 mm high "walls" in the XY directions to make it stiffer and a couple of diagonal "walls". That made it stiff enough in all directions except for one: rotation. What is the most lightweight structure I can print on the board to improve the rotational stiffness?
(By "rotational stiffness" I'm thinking of the twist that happens to the board when left side of the board is rotated away from you, while the right side is turned towards you (or the other way around), assumed you're holding the board with a long edge towards you.)
This problem is somewhat similar to having a horizontal rectangular picture frame resting on two diagonal corners and some weight on the two corners that are hanging in free air. How do you make the two corners with weights bed down less?
I'm not limited in height for this print, but I cannot print in free air. So if I should make an arc up between each diagonal corner, the arc itself would need support, which in total will make the build too heavy.
(By "rotational stiffness" I'm thinking of the twist that happens to the board when left side of the board is rotated away from you, while the right side is turned towards you (or the other way around), assumed you're holding the board with a long edge towards you.)
This problem is somewhat similar to having a horizontal rectangular picture frame resting on two diagonal corners and some weight on the two corners that are hanging in free air. How do you make the two corners with weights bed down less?
I'm not limited in height for this print, but I cannot print in free air. So if I should make an arc up between each diagonal corner, the arc itself would need support, which in total will make the build too heavy.