[quote name=pilou74]What do you mean, it is not sitting correctly on the pegs ? It should be lower ?
I already had to push a lot hard to place it.
How should it be placed ?
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Tight 3 calibration knobs so much as you can (the best with platform removed) then place a platform and level it a little bit.
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Pilou, sometimes you also have to loosen the screws of the pegs a little bit so that the platform easily slides over them. My platform would not go onto the pegs without loosening the screws a little. After it’s down you can carefully tighten them up again since the little tubes have repositioned by then.
I had the same lifting raft problem quite a lot, too. To fix that :
Adjust the 3 screws under the bed to it’s perfectly flat (“the paper sheet trick” to move the head at the 3 corners of the bed, you should tune the bed screws to keep a sheet of paper thickness between bed and head everywhere).
I gently scratched the bed with a kitchen scrub sponge [éponge à gratter]
Every few prints, I am cleaning the grease that slowly accumulates on the bed with simple house alcohol.
I didn’t have any failed print since ! (besides a test with firmware 0.3 when I couldn’t remove the raft 
Keep the good prints going on !
Cheers.
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Was there any support under the egg ? It also looks like it got too hot down there. We really need more airflow to fix these problems.
Pilou, I would try to print that egg the other way round.
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Ugh… It looks like Zortrax Team must change something in software because printer make very ugly bottom (especially if it’s rounded parts) 
I will try upside down, It might be better.
[quote name=VipeR]Ugh… It looks like Zortrax Team must change something in software because printer make very ugly bottom (especially if it’s rounded parts)
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This is very difficult for any FDM machine… Without support my UP was not any better with rounded bottoms.
For this is option with setting support angle, this part contain tricky angle, increase support to give stable base for it then everything should be ok for sphares it sometimes need up to 60degrees .
About “dodecahedron” print - there is big warning message when support is disabled exactly happen what this message said - with complicated parts minimal 10degrees is required and 20-30 is perfect, also additional air blowing is required (it will come with 0.0.3 firmware).
Best Regards
Thank you for your help, martin. I will add more support, then, for the mustache egg holder. There was 30 degrees support. I should put 60 ? What do you think ?
For dodecahedron, don’t worry, I know I should put support, but it was like a challenge. I wanted to see how it would look like without any support. (I’m lousy at support removal…)
PS : I am using 0.0.3 firmware already. (Unofficial)
This one was without fan cooler control 
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My suggestion is scuff the bed lightly with very fine sandpaper or scouring pad, and use washable glue stick before each print, but as you know, this is not the official Zortrax recommendation and I speak only for myself. I just don’t see how anything can stick very well to that smooth shiny surface, and since doing it myself and using glue stick I have not had one print lift from the bed.
Another possible trick : I am not sure of this point, but I have the feeling that the “autocalibration feature” is done by checking electrical contact between the noze and the conductive part of the bed.
However, for the contact to be made, you need to ensure that your noze is perfectly conductive, I.E. : clean. If not, the printer will have to “press” slightly more on the bed to have the electric contact esablished, and that results in a false calibration for the printer, and then at some point the noze slightly “rubs” on the underlaying layer, unsticking it.
Before each print, I clean the noze with the scrouge. It must be shiny.
Not sure if my assumptions are making any sense though :rolleyes:
Pilou, there’s no airflow in your home ? The printer is sensitive to temperature changes.
I proceed like this: printer closed room and away from windows ; closed 3 sides of the machine ; a little bit of acetone between each print to clean the tray. Never had this problem yet.
Virgo is right ! I have much less problem since I built my enclosure.