Where Do I Go From Here? - 3D Printing: Build your Own 3D Printer and Print your own 3D Objects - page 206

Figure 11.5 The PlasmaCam cuts through metal at high speed and with accuracy.
Why do I call it a plasma cutter frame? Because the PlasmaCam is simply a table/
workspace and motors that are used to move a handheld plasma cutter that is
mounted in the frame. You must purchase a plasma cutter to be mounted in the
frame. (There are a variety of plasma cutter manufacturers, so you're not locked
into one particular brand.)
Computer-controlled plasma cutters like the PlasmaCam typically come with spe-
cial software for cutting out two-dimensional objects in sheet metal. Again, if you
understand how 3D printers work in terms of moving the working end (hot end)
around the workspace, it's not a big jump to understand how a plasma cutter could
be directed to cut out objects from metal.
One final caveat: Plasma cutters produce a lot of sparks as they cut metal, and
that's one of the reasons why I don't own one—the potential to start fires. Plasma