Problems with infill

Updated 8 months ago ​by Tomáš Chvalina

Various problems with infill are not the worst kind of trouble you may come across, however, in some cases it can put the structural integrity of your prints at risk. The best moment, when you should check whether the infill is okay, is when the object is still being printed. An example of a weak/incorrectly printed infill is in the photo below.



  1. Change infill type – Certain infill types are more difficult to print, such as the cubic infill. Try using a different one, if possible.
  2. Flexible filaments – Do not try to print complex infill patterns with flexible filaments. This type of filament is especially vulnerable to imperfect infills. The best bet is to use the GRID infill when printing flexible filaments. You can change the infill pattern in the Slic3R PE – Print settings – Infill – Fill pattern.
  3. Lower the printing speed  If none of the above helps, try to slow down the printing speed of the infill. This can be done in Slic3r PE in the Print settings – Speed – Infill.

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