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  1. #21
    Join Date
    Aug 2009
    Posts
    684

    Re: Coordinate System Rotation And Planes problem!

    Quote Originally Posted by amir_nop View Post
    Isn't this moving on all 3 axes????
    The machine does it easily!
    What's the difference?
    Attachment 330474
    Hi Amir,

    Just to clarify, the drawing you attached looks like it is showing a part of a helical slot. The circular component is true to the xy plane. The z motion is a separate linear motion.

    So in the three standard working planes, an arc, even as part of a helix, is only handled by two axes. Arcing in a non-standard working plane is a feature more commonly used on 5-axis machines I suppose. It could be an optional extra on your control but probably not worth paying for.

    So how are you going to program it?

    DP

  2. #22
    Join Date
    Aug 2016
    Posts
    11

    Re: Coordinate System Rotation And Planes problem!

    Quote Originally Posted by christinandavid View Post
    Hi Amir,

    Just to clarify, the drawing you attached looks like it is showing a part of a helical slot. The circular component is true to the xy plane. The z motion is a separate linear motion.

    So in the three standard working planes, an arc, even as part of a helix, is only handled by two axes. Arcing in a non-standard working plane is a feature more commonly used on 5-axis machines I suppose. It could be an optional extra on your control but probably not worth paying for.

    So how are you going to program it?

    DP
    Thank you for the information, actually I kinda gave up, it really annoyed me! I was working on it for a whole week standing up to machine and change every line more than 10 times.
    And I'm not convinced yet.. how can our controls be that weak..??
    Anyway there is a way to get it to work and it is dividing arcs to polylines, a little macro could do that easily, maybe someday I wrote it. not on the mood and so busy at the moment :/

  3. #23
    Join Date
    Feb 2006
    Posts
    1792

    Re: Coordinate System Rotation And Planes problem!

    It looks like a simple helical interpolation. Option on some machines.

  4. #24

    Re: Coordinate System Rotation And Planes problem!

    I've tried your sample with my CNC and I've got this result:



    something wrong in program ?

  5. #25
    Join Date
    Sep 2018
    Posts
    10
    Quote Originally Posted by shineworld View Post
    I've tried your sample with my CNC and I've got this result:



    something wrong in program ?

    I'd suggest looking into g17-g18-g19 commands for your specific use.

    CNC lathes by default typically arc with the X axis.
    So changing the selection might do the trick.
    Either that, or just code it manually

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