This was a fairly simple little project. I wanted a
springloaded pencil which I could draw with on
the CNC mill so I reduced a Staedtler mechnical
pencil (@$4.00) down to it's basic guts and
mounted that in a Taig blank arbor. I mount
a piece of particle board on the Taig mill table,
tape paper on it, bring the pencil down to the
surface and jog Z down to establish how hard
I want to "write" and set Z depth accordingly.