Hello Andrew,
dammerel wrote:I have a STL file and I would like to make some 2d drawings
The subject of your topic says "STL or STP". They are
totally different types of objects.
A STP/STEP file is a true CAD format, but an STL is a
polygon mesh for which FreeCAD has very limited editing features. A polygon mesh is *NOT* a CAD format and IMO should be avoided unless you have no other choice. In CAD, all a polygon mesh is good for is for export for rapid prototyping - it is really a
garbage out format.
While it is possible to convert it into a shape or part that FreeCAD can work with (see
FreeCAD and Mesh Import), you will find that for your specific use of creating drawing views and dimensioning them will be less than optimal (and that is an understatement). For example if your object seems to have a cylindrical surface, well it is not a real cylindrical surface but actually an approximation from many triangular faces. These triangles will all show up in the drawing views, and you will not be able to get a radius or diameter dimension since the top face of the cylinder will not really be a circle.
Unless your part is made of only straight faces with absolutely no rounded/curved surfaces, the drawing views will be a total mess.
