On 2010-07-13, Jon Elson wrote:
Ignoramus3537 wrote:

I have a DRO. The issue is, if I move to point (1.2345, 6.5432), and
plung the drill down, will the hole really be in thast point or
somewhere close due to drill wandering.
OK. With the DRO, it is doable to get well-centered holes.
For the central hole and any locating bosses, use a boring head and
boring tools. You can set the exact diameter needed, the hole will be
aligned very accurately. For the bolt holes that will likely have a
little slop anyway, use a center drill first, then change to the
jobber's length drill and drill to size. it will be quite well
centered, probably within .003" or better of the table's position.
The bored hole will be within .001".

Yes, I think that I will bore the next two large holes. Good idea.

While we are at it, an unrelated question: can EMC be configured with
just one axis? (for testing). I want to test as much as possible with
one axis (limits, estop, homing etc), so that things are well
debugged. Then I would move to the remaining two axes. The question is
does EMC work with only one axis?

thanks

i