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One line wall is wider than expected

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I just tried to print an hollow cube with a 0.4 mm nozzle and the following settings:

  • line width 0.4mm
  • wall tickness 0.4mm
  • wall line count 1

I was expecting a 0.4 wide wall but I get 0.52mm ...

I investigated wall compensation overlap and the minimum wall flow but as it's just a single line wall I didn't expected any overlapping at all.

Am I missing something?

Can I fix this in any way?

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I would say it is normal if you print just a single wall. It is like printing a hole which is also smaller due the expanding of the material. You can only try if you can compensate it with a lower flow value or a smaller line width.

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