CAD & design for FDM

A model that is correct in CAD can still be a bad part: layer lines across the load path, an overhang that needs support inside a bore, a tolerance that ignores how the material shrinks. Most print failures in a working shop are design decisions showing up later, not machine problems.

This is CAD work — in FreeCAD or your existing toolchain — plus the design rules that keep the next part from having the same problem.

What you get

• Parts modelled or reworked for the direction they will actually be printed in
• Load paths oriented against the layer lines, not along them
• Tolerances and fits that account for the material and the machine
• Design rules written down for whoever draws the next part