HOW TO: Plasma cutting - in Fusion 360 - how to properly prep for a cut file (how to use a post processor)

One my subscribers on YouTube just asked for tips on how to properly prep for plasma cutting. I thought I would paste a copy here of the answer I gave them:

I am using Fusion 360 for about half of my CAD (drawing) and 100% of my CAM for plasma (manufacturing, i.e. rendering GCode for the cut). The link below leads to my forum post that documents sourcing for two different plasma post processors for Fusion 360.

Choice of two (2) PlasmaC (LinuxCNC) Post Processors for Fusion 360

In the post, the first one in the list is the one I’m using!

The Fusion 360 basic steps, in order, are:

  1. In Design mode: create and draw a 2D sketch,

  2. In Design mode: click “Sheet Metal” and create/add a flange to your 2D sketch, with a sheet metal choice/type of “steel” (I have custom copies for correct thicknesses of 18 ga and 20 ga, etc),

  3. Click into “Manufacturing” mode,

  4. In “Manufacturing” mode: create a new Setup,

  5. In “Manufacturing” mode: under “Cutting” create a 2D profile

  6. In “Manufacturing” mode: under “Actions” click Generate (or tap the Generate GCode shortcut button above it, to choose the post processor and use it.

Note (very specific to the post processor I’m using, linked above): if the rendered gcode gives errors related to “arc start and arc end are not the same” (or some such), redo above but uncheck “MergeCircles” in the “Post properties”

The above steps will process and produce a file of type “.ngc” (by default named 1001.ngc).