Sure @JTP_3D.
This was not a slicer issue, but a faulty design. I used Shapr3D (highly recommended btw) to create an angle in the top surface of the bottom. This prevented shrinkage, as described in my previous comments.
Hope this helps mate!
Thanks for the reply. I was realy hopping to get this solved faste. This is not the case.
Well I am not even shure if this is the same problem. I will upload photos for others to see if this is actualy a blob.
As soon as they allow me to post ai the forum I will do it.
You are a “Basic User” so you should be able to post now.
I have now done some testing. Option 1 seems rather difficult for me to implement in Orcaslicer or BambuStudio.
Options 2 and 3 have given me the best results.
Option2:
Option 3:
For option 3 I tried a concave with 1mm distance in the middle, which results in about 5 visible rings due to the different height, but this was not enough to solve the problem. The concave must be at least 3mm deeper in the center than at the edge.
So for most applications, one of these two options will be sufficient, unless you need a straight surface at exactly this height, as something should be placed on this surface and it should also be able to withstand some weight.
Therefore, for option 2 with the thin base, I have constructed a step along the edge and a support column in the middle as a possible solution to this problem.
Option 5:
I’m not sure if I’ve understood the proposed solution correctly, but the ring-shaped grooves in the floor should prevent the material from contracting, which sounds logical to me. I did two tests with 2 rings and 4 rings, each 1mm deep. Unfortunately, neither test gave a good result, as this would be the best way to retain the flat surface.
During the tests, however, I discovered the following:
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I thought that if I left the printing chamber heated, the material would warp less because the temperature would be constantly warm. However, I achieved the best results with an open build chamber using this Air Vent Glass Riser: P1S LED Air Vent Glass Riser by ENVY3D - MakerWorld
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also I thought that if the filament is printed at a lower temperature, it will shrink less afterwards as it is already at a lower temperature, which I could not detect even at 15* temperature difference. The results were the same with 205* and 220*.
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the best results were achieved with the open housing as described above, fan at 100% and auxiliary fan at 70% (default setting Bambu PLA).
Perhaps this will help someone else here 