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  1. #1
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    4 axis machining problems

    I was trying yesterday first 4 axis machining and things goes wrong, I checked the g-code online and it looks good there. Please see attached photo and g-code file.
    Link where I checked the g-code is https://ncviewer.com/
    I have MK1 controller from 2011 and never tested it on true 4 axis machining.
    Also X Y and Z colors are wrong in software, and the tool path is reversed on Y axis that is my rotary axis on.
    Click image for larger version. 

Name:	cnc usb controller.jpg 
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ID:	443583
    And should be like this:
    Click image for larger version. 

Name:	ncviewer.jpg 
Views:	0 
Size:	94.9 KB 
ID:	443585

  2. #2
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    Re: 4 axis machining problems

    Apart from G40.1 g-code (which is used for C axes on some Fanucs) .and incorrect toolchange in beginning I don't see anything wrong. NCviewer displays this incorrectly

  3. #3
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    Re: 4 axis machining problems

    I removed what was wrong for you, the problem is the deviation from the tool path marked in red on the picture, I ran this code and it broke my part exactly as it looks in CNC USB Controller, but in NCViewer tool path it is exactly as it should be. I have attached the modified tool path to check it.
    Second, in all CAM CAD programs the X axis is red and the Y axis is green.
    Third, the tool path does not look the same in the nc viewer with CNC USB Controller as an orientation.
    Attachment 443588
    Attachment 443590

  4. #4
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    Re: 4 axis machining problems

    Found the problem, B axis in machine definition was on Y+, changed that to Y- as it is on my machine placed, tool path is good, orientation also good, but god still X axis must be RED and Y axis GREEN.
    Best Regards
    Attachment 443600

  5. #5
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    Re: 4 axis machining problems


  6. #6
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    Re: 4 axis machining problems

    Exactly as I said X RED and Y GREEN, in CNC USB Controller software the X is green and Y red as you can see in pictures bellow.

  7. #7
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    Re: 4 axis machining problems

    Seems that old software used these color. I never noticed they are not correct.
    Why don't you use TNG?

  8. #8
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    Re: 4 axis machining problems

    Because I have a DIY Controller MK1

  9. #9
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    Re: 4 axis machining problems

    Quote Originally Posted by adidoro View Post
    Found the problem, B axis in machine definition was on Y+, changed that to Y- as it is on my machine placed, tool path is good, orientation also good, but god still X axis must be RED and Y axis GREEN.
    Best Regards
    Attachment 443600
    How the hell I do that, I have the same problem with TNG now.

  10. #10
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    Re: 4 axis machining problems

    I think is only a display problem related to this https://www.cnczone.com/forums/plane...y-problem.html
    Waiting for an answer and a solution to that thread to compare, I don`t have nerve to run that program on my cnc.

  11. #11
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    Re: 4 axis machining problems

    Seems like you don't have correct orientation.
    Good explanation is here:
    https://www.autodesk.com/products/fu...tem-made-easy/

  12. #12
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    Re: 4 axis machining problems

    I already know that, please check this thread https://www.cnczone.com/forums/plane...y-problem.html

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