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Tilted Working Plane

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17 Jan 2023 07:47 #262216 by aubrey5667
Tilted Working Plane was created by aubrey5667
Hey guys，How to achieve inclined surface machining
For example, Fanuc G68.2，G68.2 X Y Z I J K/G53.6 P_Q_H  

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17 Jan 2023 10:02 #262223 by andypugh
Replied by andypugh on topic Tilted Working Plane
I don't think that is supported in trivial l(XYZ) kinematics.
It is possible to rotate the XY around Z using G10 L2
linuxcnc.org/docs/stable/html/gcode/g-code.html#gcode:g10-l2
But the only available work planes are XY, ZX, YZ, UV, WU, VW:
linuxcnc.org/docs/stable/html/gcode/g-code.html#gcode:g17-g19.1

What is the use-case for tilted planes? Is this for canned-cycles such as drilling and boring at angles?

It is possible to achieve this with non-trivial kinematics.

But it requires a specific machine configuration.

Or is it intended for hand-coded G-code to machine a surface? (There seems little point if using CAM, and I doubt that CAM knows how to use the codes anyway?)

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01 Feb 2023 07:05 - 01 Feb 2023 07:09 #263422 by Aciera
Replied by Aciera on topic Tilted Working Plane
I have created a sim config with a rotary/nutating head and I'm working on a G68.2 'tilted-work-plane' remap. I'm using this fanuc document as a guide:

nanopdf.com/download/fanuc-5-axis-programming-codes_pdf

While defining the work plane can be done on any kinematic moving the tool to the requested orientation will depend on the specific machine kinematic at hand.
If anybody has hands on experience using M68.2 and it's affiliated gcodes I'd like to pick their brains.

 
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Last edit: 01 Feb 2023 07:09 by Aciera. Reason: fix link to pdf

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02 Feb 2023 14:36 #263524 by automata
Replied by automata on topic Tilted Working Plane
Hi Aciera,
I came across the Syntec CNC 5 axis manual which alludes to G68.2 - Tilted working plane. May be helpful .
www.syntecclub.com/cncrel/Manual/PDF/5-A...ication%20Manual.pdf
Regards,
-automata
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03 Feb 2023 07:34 - 03 Feb 2023 10:45 #263579 by automata
Replied by automata on topic Tilted Working Plane
One more 5 axis manual from Fanuc: pdfcoffee.com/qdownload/fanuc-5-axis-pdf-free.html
if you cant find the file there, you can find the same manual here too: drive.google.com/file/d/11XDO8WO0L8zVfur...er4/view?usp=sharing
About half way through, there is a section on Tilted working plane
Edit: Good information available on: www.linkedin.com/pulse/fanuc-g682-5-axis...planes-tim-markoski/
-automata
Last edit: 03 Feb 2023 10:45 by automata.
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05 Feb 2023 12:00 #263747 by Aciera
Replied by Aciera on topic Tilted Working Plane
I wonder how they define the work plane if they allow a +-5deg error in the defining vectors?
Would you take the z-vector as passed in the parameters and orthogonalize the x-vector?

 
 
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05 Feb 2023 17:31 #263760 by Aciera
Replied by Aciera on topic Tilted Working Plane
Another question: Am I correct in assuming that for G68.3 with alpha=0 (default) the target x-axis is in the machine xy-plane (ie horizontal)?
 
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  1. GCode and Part Programs
  3. G&M Codes
  5. Tilted Working Plane
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