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    Default Issues with dynamic tool paths and mach3

    Is there a limitation to the speed of Mach 3 communication to the drives? My machine has issues when I run dynamic tool paths that have a lot of I-j codes. I have servos and never have issues when I run normal tool paths. It just really seems to be the the thousand and hundred thousand i-j's. some of the dynamic paths I run have 600,000-900,000 lines of g-code.


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    Default Re: Issues with dynamic tool paths and mach3

    What are dynamic tool paths?
    Does turning off the toolpath display help?

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

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    Default Re: Issues with dynamic tool paths and mach3

    Quote Originally Posted by ger21 View Post
    What are dynamic tool paths?
    Does turning off the toolpath display help?
    The dynamic tool paths are made to keep constant contact between the tooling and the workpiece. It helps for faster machining but utilizes a lot of arcs instead of lines. He's a video of one

    I have not tried to disable the display


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    Default Re: Issues with dynamic tool paths and mach3

    Quote Originally Posted by ger21 View Post
    What are dynamic tool paths?
    Does turning off the toolpath display help?
    Do you know if I should have it set to constant velocity when a lot of arcs are coded?


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    Default Re: Issues with dynamic tool paths and mach3

    Imo, you should always be using Constant Velocity mode.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (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: Issues with dynamic tool paths and mach3

    Quote Originally Posted by ger21 View Post
    Imo, you should always be using Constant Velocity mode.
    That might have been my issue. I'm trying it now.

    What is a good value for the cv distance? I'm running servos so it shouldn't be losing count.

    Thanks


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    Default Re: Issues with dynamic tool paths and mach3

    With lots of arcs, there could be a "round-off" accumulation error,
    I tried those paths on a Fadal and after a few hundred moves it lost it's brains.
    Is your machine control capable of 4 decimal places Like .0001 or .0005 or .001?



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    Default Re: Issues with dynamic tool paths and mach3

    Quote Originally Posted by bostosh View Post
    With lots of arcs, there could be a "round-off" accumulation error,
    I tried those paths on a Fadal and after a few hundred moves it lost it's brains.
    Is your machine control capable of 4 decimal places Like .0001 or .0005 or .001?
    Should be capable of ten thousands but I'll verify and see it I can measure a move that small


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    Default Re: Issues with dynamic tool paths and mach3

    I'd disable CV Feedrate and CV distance.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (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: Issues with dynamic tool paths and mach3

    Quote Originally Posted by bostosh View Post
    With lots of arcs, there could be a "round-off" accumulation error,
    I tried those paths on a Fadal and after a few hundred moves it lost it's brains.
    Is your machine control capable of 4 decimal places Like .0001 or .0005 or .001?
    I verified that it jogs .0001. I didn't measure it but I could see the ball screw and coupling move the most ever so small amount lol.


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Issues with dynamic tool paths and mach3

Issues with dynamic tool paths and mach3