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In this answer user Barafu says,

Yet I manage to keep my tolerances +- 0.05 mm which is enough for everything but miniature printing.

I have asked for clarification on that answer regarding what is meant by "miniature printing" but in the meantime, I want to ask the general question.

What impact does dimensional accuracy of filament have on final print quality, and why? Does it vary between different filament types?

1 Answer 1

Put it simply: they say 1.75 mm with a +/- error of .05 mm. Which means your flow may vary +/- 2.9 % while you are printing creating blobs and such.

The smaller the filament tolerance, the more expensive the production costs.