Problem 66 - 3D Printer Test

Does your 3D prints suffer from the dreaded **Problem 66**, aka the "Inner Floor Outer Perimeter issue"? Not sure? Then print this quick test object and find out!

This issue causes the outer perimeters, or the outer surface of your prints to have lines or markings along the sides of the print that coincide with having a solid inner floor or inner ceiling in your print. See the .STL model for an example of the inner floor on the top half and the inner ceiling on the bottom half.

We don't know what causes this issue, but here's what we know so far!


**Who has this issue:**
* It might be a slicing software issue, and not an actual printer problem.
* Most of the people that have this issue are using Slic3r (Prusa Slicer), however Cura and Simplify3D can also be affected.
* Generally, people with this problem who try both Simplify3D and Slic3r, will find that the problem is more visible with prints made on Slic3r.
* Not everyone has this problem.

**What affects this issue?*