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Home Forum Configuring LinuxCNC Advanced Configuration 4th axis tangent to path XY

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TOPIC: 4th axis tangent to path XY

Re:4th axis tangent to path XY 24 Sep 2011 10:53 #13424

changing a line in kins code? ...but the angle needs to vary in real time as part is being cut (the whole job does not get cut at same angle)

what do you mean by a processor?


~*Brian
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Re:4th axis tangent to path XY 24 Sep 2011 11:52 #13427

  • andypugh
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bvandiepenbos wrote:
but the angle needs to vary in real time as part is being cut (the whole job does not get cut at same angle)
It would cut the current line at angle A to the path.
G1 X3 A5
G1 Y5 A-10
(for example)
Wiggly lines are more difficult. The kins module doesn't really know enough to do it.
what do you mean by a processor?[/quote[
Preprocessor, the software that creates the G-code.
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Re:4th axis tangent to path XY 24 Sep 2011 12:56 #13429

Using A value in gcode would be a place to start.
What needs added to kins?

Thank you for your help.
~*Brian
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Re:4th axis tangent to path XY 24 Sep 2011 13:16 #13430

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bvandiepenbos wrote:
What needs added to kins?
just change line 56 to
A = atan2(dx, dy)*(180.0/3.141592) + pos->a;
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Re:4th axis tangent to path XY 30 Sep 2011 08:52 #13562

  • ioiotutu
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Hi,
only today i was able to test the new tangentkins.c, all is ok.

The file work fine with m-codes. I can lock A axis on tangent path or unlock and use it in a standard way.

Many thanks.
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Re:4th axis tangent to path XY 25 Mär 2012 04:19 #18777

  • molotow
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Hello,

i've tried your tangentkins with the default config for Sherline4Axis, because it's config is very similar to my machine.
I replaced trivkins with tangentkins.

My problem is that i alway get the following error:
37403: ERROR: joint 3 following error

Am I doing something wrong?
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