Ok, so today i got the PLA90 from OrbiTech and printed the same object again.
It seems that the warping is the same as standard PLA. Here is the comparison:
The first print warped 4-5mm from ground.
The second print warped 3-4mm from ground, i pressed the blue tape to the platform to make it stick better and it proved to be a (little) improvement.
The third print is incomplete and is a previous attempt with the metal gray standard PLA which came with the UM. It has a bit less warp but i'm sure that once completed it would have been like the second print.
One idea would be to use a bigger nozzle so that less layers would be needed and so less warping would occour. But that does not solve the problem completely and also means worse finishing.
I don't know if i should keep the UM or sell it.
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I've seen similar effects, but it turned out that the tape came off the glass locally... but yes, more infill can cause more warping... my point originally was to encourage the OP to not give up yet.
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