A striking example. The result of the standard translation of the STP format into STL through the AutoDesk NetFabb program is shown below. The problem lies in the polygons that protruded outward, although there were no such defects in the STP file itself. This is how most programs and convectors work.

The negative effect of this action manifests itself at the time of preparation of the control program for the 3D printer.

All polygons and irregularities that appeared during the import crawl out to the surface.

That at the exit will not allow organizing the correct trajectory of the printer head relative to the original model.

The solution to this problem can be the Materialize Magics program. During the loading of the STP file, the program asks which export parameters should be set. I have selected the following parameters for myself:

No polygons found after conversion!

Let's check the model in a slicer. Everything is okay.

And there are no problems with the preparation of the control program, which means there are no negative factors in the process of preparing the GCode.

This quality is comparable to our online STP to STL converter.