89Re: Home made CNC machine
- Sep 5, 2008--- In firstname.lastname@example.org, "John
Johnson" <chestef@...> wrote:
> I joined the group for I am interested in a homemade 3 axis CNC
> machine for my machine shop. Is it 3D printing, No? It is a 3D
> project where I want to make a gantry CNC machine to be able to
> drill the locations of holes in a part with more accuracy thana
> layout and center punching. Also, when I have multiple parts to
> make, the parts can be a lot closer in tolerance. Matching hole
> patterns in mating parts are closer to fit up than layout and
> punching, or drilling and transfer punching, especially when hole
> sizes are other than the sizes in a standard set of punches.
> The value of this is as follows: in working at large machine
> builders we would make machine bases of 10' x 20', as an example.
> Machining the top of the base to start and then spot drilling the
> hole locations came next. Drilling, boring, and finish reaming the
> dowel holes came next.
> The base would then be removed from the boring mill and set up on
> the floor and leveled. The tapped holes were all that remained so
> magnetic based drill was used to tap drill, then tap the holes,boring
> using the spot drilled holes for location. This freed up the
> mill for the next large job and took the tedious machiningparts
> operations and put them in the hands of a machine builder or
> apprentice, that was making less per hour than the boring mill
> I wish to locate the hole centers with this gantry and put the
> on a drill press to finish drill and tap from there. This machineTake look at this site:
> could be running one part while I am at the drill press working on
> another part, as an example. It need not be robust or fast. Using
> AutoCAd to design the parts I could either program the coordinates
> or use a low end CAD/CAM software to program the point-to-point
> Can anyone advise, or lead me to a link or website?
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