Several years ago I worked on a quote for a job of similar size but the
accuracy had to be much better. I think it had to be plus or minus
0.010 inches or so over the entire 3D space.
A 3D laser tracker was part of the control scheme to track the actual
tool head location.
That way standard rack could be used for the positioning mechanism and
the position could be corrected on the fly via the laser tracker.
The machine was a big router used to make parts for modern battleships
which are constructed of composites.
The router was going to be constructed as part of a building that was
temperature controlled to minimize the effects of temperature changes.
The DOD killed the contract and the entire project went away.
Without some type of correction, you are going to have to deal with
temperature expansion/contraction issues which can be considerable over
150 ft.
On 8/22/2017 8:37 PM, Rick Gresham wrote:
Hmmm, interesting but there's guys already working on that. No, different
application but with some similarities - placing a calculated amount of a fluid
at a specific point or range of points in a 3D space.
On Aug 22, 2017, at 5:02 PM, Gene Heskett <[email protected]> wrote:
On Tuesday 22 August 2017 13:01:01 Rick Gresham wrote:
I'm exploring options for a 3 axis controller similar in some ways to
typical cnc router-like application. What may make my application
unique is the size of the 3D space in which the tool operates: up to
about 150' x 150' x 50'. In addition, I need to control tool changes
and calculate/control fluid flow rates based on calculations applied
to retrieved persistent data.
Does this sound like something LinuxCNC can handle?
If you can build the hardware, linuxcnc can likely control it.
Sounds like you want to cast buildings with high slump concrete? In this
case I am sure that linuxcnc's ultimate accuracy will match, or with
suitabe screw compensation, handily beat the elasticity of the support
framework you can still knock down and move on a public road with
permits, 56 wheels and escorts. :)
Private replies welcome.
Thank you.
Rick Gresham
Portland, OR
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Cheers, Gene Heskett
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-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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