I've been using it for 2.5 years and have made more than a hundred parts for my locomotive project. In a short seminar all you can do is an introduction, mainly on the concepts. I'd expect the best format would be demonstrating these concepts with CB operating on a laptop with a screen projection. Powerpoint slides and screen shots would not be very effective in my view.
Since CAM is the intermediate stage between CAD and g-code/operation, there would need to be some assumptions about the audience background. My up-front take would be that the main audience would be manual machinists looking to move to CNC. Therefore there would need to be some descriptions of CAD capabilities and the concept of polylines and points, but very little discussion except in passing of CB's CAD capabilities. The demonstration would take a sample DXF file imported into CB, then edited and otherwise manipulated to get to the stage where machine operations could be added. Then I'd want to demonstrate the basic operations of drill, pocket, profile, and engrave MOPs, CB parts, and use of layers. Finally generation of g-code with a discussion of machine-dependent posts. The degree of detail in any topic would depend on the amount of time allocated. I would not try to get into 3D machining and STL files unless the session were to be a lot longer.
It would useful to show the machined result, either in concert with a Mach demo on a real machine or using Cutviewer. This could be discussed as time goes on. At a minimum, the gcode could be loaded into mach3 to show how the toolpaths match those shown in CB.
Having enough time allocated to Q&A is pretty important in technical presentations.
My work background has included a lot of sales support technical presentations and discussion of software products.
