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So from the image it appears your model isn't sitting flat. One circular area is touching the bed but the rest is not - it is maybe 0.00000000000001mm higher.
You could fix it in cad but a faster fix is in cura. Go to menu "preferences" "config cura" and go to "general" tab and uncheck "automatically drop models to the build plate".
Then use the move tool and click on the part and set the Z value to a negative value. Try -0.2mm to start then move that value closer to 0mm until it slices "wrong" again and go back. If you are lucky you only have to shave off 0.1mm of the bottom of the part to get it to print "correctly".
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gr5 2,332
So from the image it appears your model isn't sitting flat. One circular area is touching the bed but the rest is not - it is maybe 0.00000000000001mm higher.
You could fix it in cad but a faster fix is in cura. Go to menu "preferences" "config cura" and go to "general" tab and uncheck "automatically drop models to the build plate".
Then use the move tool and click on the part and set the Z value to a negative value. Try -0.2mm to start then move that value closer to 0mm until it slices "wrong" again and go back. If you are lucky you only have to shave off 0.1mm of the bottom of the part to get it to print "correctly".
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