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Topic: Looks like thermal banding?

looked good till it got 30mm off the bed. i don't have a case. i feel this may be a big part of the problem. either that or my x stepper fan blows on the bed once it gets to that height. printed at .3 layer height.

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Re: Looks like thermal banding?

In the third photo, the banding is caused by the small area of those layers either side of the hole. The plastic doesn't have time to cool properly so distorts. Using a fan will assist here.