Add a rotary axis B on a lathe

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26 Aug 2020 14:17 #179546 by jean-claude
Hello to all,
Is it possible to add a B rotary axis on a lathe (I think the axes would be XZC) and configure a post-processor in fusion360?

Thank you for your help

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26 Aug 2020 14:39 #179549 by Aciera
I guess it kind of depends what that B axis actually does. How would that axis interact with the XZ and or the spindle?

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26 Aug 2020 15:03 #179551 by jean-claude
The spindle will be on the B axis.

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26 Aug 2020 15:44 - 26 Aug 2020 15:45 #179555 by jean-claude


here is a sketch
Attachments:
Last edit: 26 Aug 2020 15:45 by jean-claude.

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26 Aug 2020 18:06 - 26 Aug 2020 18:09 #179561 by Aciera
So is C a spindle and an axis as in a lathe with a spindle that can be positioned or is the B the only spindle and the C just a rotary axis? To me this looks more like a 4 axis XYZA milling setup with a rotary axis A and without the linear Y axis.
Last edit: 26 Aug 2020 18:09 by Aciera.

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26 Aug 2020 20:12 #179574 by jean-claude
The C just a rotary axis and B the only spindle.

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27 Aug 2020 07:07 - 27 Aug 2020 07:13 #179665 by Aciera
Ok then your machine is milling machine with a horizontal spindle and a rotary A axis without a Y axis:
your X is the Z,
your Z is the X,
your C is the A,
and the Y does not exist.
In many CAM software you can define the rotary A as substitute for the missing Y so the tool path for Y is wound around the A axis. I have no experience with Fusion360 so I can't comment on how to do it there but I would expect it be able to do that.
The post processor would be the same as for a regular 4 axis linuxcnc mill.

so you might want to change the title of the post to get more information regarding 4 axis milling in fusion360
Last edit: 27 Aug 2020 07:13 by Aciera.

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27 Aug 2020 07:30 #179667 by jean-claude
Thank you very much for this research track.

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27 Aug 2020 13:42 #179687 by jean-claude
I looked in Fusion360 and the rotation part is paying. Too bad because it's for leisure.

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27 Aug 2020 19:07 #179724 by anfänger
are you sure? I can generate 4 Axis tool paths but I never tried to post process cause ma mill only as three axis at the moment

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