Hello hello.
In the company I just joined, we use a 3D printer... big first for me (yes well, I'm not ahead of the curve on the subject, but we do what we can ^^)
I can see that when we print, it doesn't necessarily go as it should: the base of the part tends to rise/peel off when printing. However, we have set up a raft.
Similarly, the final surface condition is frankly not great: it's as if the material is "blistered" in places.
I know it worked pretty well before, but they changed the thread for something more "bio-based" (it's still plastic. So bio-sourced leaves me speechless)
Torture and temperature tricks were done.
Do you have any advice on which settings to fine-tune and which to play on??
We use a Raise 3D pro 2 printer with IdeaMaker software and a PLA wire from PolyTerra
Thank you
Did you respect the temperature range of this PLA?
If too hot, it can actually give the impression of blistering.
For the chainring it can indeed come off if too hot, but you really need to have a very large heat range.
It's PLA, did you check it?
Edit: you can also put a thicker layer for the raft or 1st layer and reduce the speed to gain grip.
And also check the tray setting. (Automatic leveling?)
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Hello @sbadenis and thank you for your answer
Yes, I checked the temperature range as well as the tray range.
So, on the contrary, we increased the temperature (230° instead of 205°), following the temperature tower. Which seems to have slightly improved the surface finish... But it's not revolutionary either.
Anyway the range being 190-230 ... we couldn't go much lower 
On the other hand, I write down the info for the set. To be seen by going down this side
And the setting of the chainring seems to be good
See this topic for you on 10 Warping (one of the causes can also be the materials)
And on the 15th (bubbles)
https://cults3d.com/fr/blog/articles/identifier-corriger-defauts-problemes-impression-3D
The 2 probable causes = the filament, try another filament if the printing is good your filament is either too wet or of poor quality.
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On a pro printer I guess the leveling is automatic and accurate so indeed there is little chance that it comes from there.
The humidity in the yarn is possible on the other hand or simply the yarn is not great or not compatible with your printer.
To check purchase a PLA coil that worked well before and at least you tighten fixed.
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Haha... it's pro but manually adjustable!!
Great your site with the problems. Indeed, it looks a lot like the 3,10 & 15
Thank you very much for your help. All this seems to agree in the same direction: we will have to study the coil before going further in our research
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