CAD File Info
Or, Why We Do Not Want 3D Files.
CNC hotwire is essentially two 2D jobs running at the same time – one on each end of wire. So we prefer CAD files in DXF or DWG format of root and tip profiles (if different), and another file with top view for computing geometry. 1:1 scale and imperial units with proper dimensions makes things go faster and reduces chance for conversion error on my part.
This only applies if you are not using a published airfoil (We consider a published airfoil to be anything with a .dat file that’s been put out on the interweb for download). OR if you are using a published airfoil and you have a bunch of interior features such as tube holes, spar slots or hinge lines.
We charge a one time fee (usually 20-30 bucks) per airfoil for CAD to CNC conversion.