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Tim Killian
 
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Dreaming. A new VMC with those specs will cost $30K-$40K. You might find
something used for 2/3 that price. Don't bother with benchtop stuff
unless you're certain you'll never be running larger parts. Consider
adding an automatic tool changer to your features list.

Profiling requires servos and a decent (i.e. modern vintage) controller
that can run all 3 axes simultaneously with look-ahead. Beware of
low-cost older machines with decent iron but have stepper drives or a
controller box Marconi would recognize.

We bought a couple of these VMCs last year, and they've worked out well
in terms of reliability and throughput:

http://www.atrump.com/toolroom/Maximill/MAXIP1.htm

wrote:
I would like to CNC vertical mill some 2024-T3 aluminum parts from
stock approximately 12"X12"X2". The parts are about 6"X6"x2" and have
a general profile tolerance of +/-.001. The parts will require full 3
axis machining.

What are my basic options for a fairly affordable CNC but one that has
decent enough speed and rigidity to make these parts in an
average/reasonable amount of time? For instance I would be happy if I
could make them in half the time that say a $50,000 used Haas or Fadal
VMC could make them in. The machine would only run about 10 hours a
week so it doesn't need to be too hell-for-stout.

A small machining center? A retrofit/conversion? A benchtop? Import
vs domestic? Other options?

I would like to keep the price down under about $7k if possible. Am I
dreaming?

Thanks folks.

Joe