Homebrew PCBs

> Thought you had some means that didn't
> utilize backlash compensation. You can
> get zero backlash on only one axis without 
> compensation during CNC drilling by
> optimizing the Excellon output for that
> axis. The other has to be compensated.

Parse the g-code so that before every drill
it retreats a little bit in both X and Y.

Then it is approaching every hole from the
same direction.

It's kind of an un-optimisation.  There
would be better strategies no doubt.  It
is a dead cert to work though.