GRBL 1.1 Cutting arc on the Z-axis using G2 command?


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Thread: GRBL 1.1 Cutting arc on the Z-axis using G2 command?

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    Member kevinol's Avatar
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    Default GRBL 1.1 Cutting arc on the Z-axis using G2 command?

    I have a piece I need to cut a 180 circle out of in the Z-axis. From what I've read, this would be supported by something like this...

    G91
    F100
    G2 X0Y0Z0 I0 J0 K-2

    But when I run that, all I get is "OK" back without movement. Any ideas?

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    Default Re: GRBL 1.1 Cutting arc on the Z-axis using G2 command?

    You have asked for a circle with zero radius. The arc commands work by moving to the start point, then in the g2/g3 command specifying the end point, and specifying the incremental distance in I and J words. Grbl mostly follows the gcode standard specifyed by Linuxcnc, so have a look at Linuxcnc’s reference documentation for g2 and g3 for more information.



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    Default Re: GRBL 1.1 Cutting arc on the Z-axis using G2 command?

    thanks that helped... looks like needed to switch planes to XZ first and then attempt the move with I and J.

    G18
    G2 X0 Z0 I1 J-1 F50



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    Community Moderator ger21's Avatar
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    Default Re: GRBL 1.1 Cutting arc on the Z-axis using G2 command?

    Yes, you need to change planes. Not sure if GRBL supports G18-G19 though?

    Gerry

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    http://www.thecncwoodworker.com/2017.html

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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Default Re: GRBL 1.1 Cutting arc on the Z-axis using G2 command?

    G17, G18, & G19 are supported.



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GRBL 1.1 Cutting arc on the Z-axis using G2 command?

GRBL 1.1 Cutting arc on the Z-axis using G2 command?

GRBL 1.1 Cutting arc on the Z-axis using G2 command?