* Layer thickness should never be more than 80% of the nozzle diameter (which is currently 0.4mm), as the deposited fused filament will not stick enough to the previous layer. You need it to be squashed a bit into the previous layer so that your part does not delaminate in the end.
## student questions:
* stl data format , triangular vs quad meshes???
* STL: "An STL file describes a raw unstructured triangulated surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles using a three-dimensional Cartesian coordinate system. STL coordinates must be positive numbers, there is no scale information, and the units are arbitrary."