Home Built Rotary Axis Machine
I’m new to the site so feel free to correct any mistakes I make.
Constructive criticism is always welcome.
I’ve been running a small 3 axis machine for some years now.
I use it to produce artistic relief's in Australian timbers.
Recently I designed and built a little XZA Rotary axis rig to explore the challenges of rotary machining. Its made of acrylic and its work space is 300mm x 120mmdia. Theoretically accurate to 0.03mm.
The finished item is pretty close to this render and of course I use LinuxCNC with the Axis GUI to control it.
Everything works except for the graphic showing the tool path. The job runs properly and the resultant cut is correct in all respects.
Although the tool is touched off to the top of the job the graphic depicts the tool as being inside the cylindrical workspace cutting on the bottom of the job. Nothing I’ve tried will get the tool cone to display on the top outer surface. Any Ideas would be greatly appreciated.
Regards
Frank
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Have a look at this thread
www.linuxcnc.org/index.php/english/compo...729&limit=6&start=24
It produces a solution for using back tool / slant bed lathes through G10 L2 axis rotation. Your rig has many similarities with such a lathe.
The other option is to experiment with setting something like [DISPLAY] GEOMETRY= -XZA in the .ini file, but this tends to leave the dimensions bars and axis intersection markers orphaned in the plot display.
regards
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I'll try that links advice out today. I mucked around with the GEOMETRY parameter when I was first setting up but the stuff in the link was unknown to me.
Thanks again and I'll tell you how I get on.
Regards
Frank
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Recently I designed and built a little XZA Rotary axis rig to explore the challenges of rotary machining. Its made of acrylic and its work space is 300mm x 120mmdia.
That's an interesting looking machine.
You could probably get quite a lot of money for that via Kickstarter, if you wanted to be making machines, not machining wood.
There are quite a few ornamental turning lathes using LinuxCNC, Dewey Garret is fairly heavily involved in the project:
www.deweygarrett.com
And I have seen Bill Ooms on these forums too
billooms.com
Do you have any links to your work?
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Nice. Very Huldra.Here's a pic of a recent piece done in a Jarra burl
It might not actually be possible, or not without code changes.By the way I still haven't got the Axis display to work properly.
The order of the axes in the GEOMETRY line is rather important, but I guess you might have tried all combinations by now.
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Do you have a photo of the rotary axis machine at work?
John
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This is a pic of the machine setup for a 90mm Dia PVC Lithophane.
Yes that's a Chinese 3 axis controller. It works well.
At the moment I'm trying to get Solidworks interfaced so I can machine directly not through STL's
This is not as easy as one would think as changing machine configurations and post processors
to accommodate my unconventional design is not straight forward. DeskProto was a piece of cake.
Here's a pic of the pen I want to make.
Regards
Frank
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By the way what happened to the pics in my previous posts
No idea. I know I didn't delete them, and I suspect JT didn't either.
The forum is a bit strange. You should be able to go back, edit the post, and put them back.
I looked in the file browser in the admin section and they have just disappeared.
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