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Cracks in PLA printed parts....

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I have ultimaker 2 + and very happy with the print quality. Do generally use PLA filament of ultimaker. But since 3 months using PLA third party filament and now it is creating issue. Cracks in PLA printed parts. suggest me solution for this issue.

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Are these cracks that appear after you apply force or is it just under extrusion in certain areas?

Which brand of filament are you using?

Some time ago I tried some old cheap filament I had left and I had the same problem. It was clearly the bad quality filament that was stored in bad conditions. I partially fixed the problem printing slower and using smaller layer heights (0.1mm normally). You can also play with higher temps, but that will cause some stringing and problems with overhangs depending on the model you're trying to print.

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