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IndustryArena Forum > CAM Software > FeatureCAM CAD/CAM > Weird issue with NC output
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  1. #1
    Join Date
    Mar 2005
    Posts
    65

    Weird issue with NC output

    What would cause my G2's and G3's to be reversed?
    Example
    N190G2X7.3496Y7.0625I4.4685J4.1524
    Should be
    N190G3X7.3496Y7.0625I4.4685J4.1524
    All the lines in the code are output reversed.

  2. #2
    Join Date
    Mar 2003
    Posts
    4826
    Sounds like something that would be easy to change in the post processor setup.

    This is code meant to be run on a 'real' cnc or is it on a retrofit?
    First you get good, then you get fast. Then grouchiness sets in.

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

  3. #3
    Join Date
    Sep 2003
    Posts
    363
    It’s possible that the post processor is at fault but if it worked for you before I would look in the machining attributes or even a setting attached to the tool. This has happened to me before but so long ago that I forget what it was. Normally you will just have to select or deselect a box and all will be good again.

    Gary

  4. #4
    Join Date
    Mar 2003
    Posts
    4826
    Maybe a 'mirror toolpath' function of some sort would have that effect?
    First you get good, then you get fast. Then grouchiness sets in.

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

  5. #5
    Join Date
    Mar 2005
    Posts
    65
    I cant seem to find the setting to change...first time playing with the software in the lab at school. It works really good with solidworks 2007. The lab has a CNC but I want to save the NC to use on my DIY router. The CNC mill in the lab shows the G2 G3 reversed when graphed so some setting is wrong somewhere.

  6. #6
    Join Date
    Dec 2007
    Posts
    3
    when i was setting up the post for my prototrak machines, i found that all of my g2 and g3 were swapped.

    I went into the post and into CNC-Info | NC Codes...

    I then swapped g2 to g3 and g3 to g2.

    It seemed to take care of all my backwards arcs.

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