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IndustryArena Forum > CAM Software > Vectric > PhotoVCarve and VCarve Pro > Tool diameter compensation G41/G42 Post processor
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  1. #1
    Join Date
    Jun 2015
    Posts
    109

    Tool diameter compensation G41/G42 Post processor

    Hi
    Wondered if anyone had any experience of adding the G41/G2 command to a Vcarve pro post processor file. In particular I have a Syntec 6MB controller.

    Thanks in anticipation

  2. #2
    Join Date
    Mar 2003
    Posts
    35538

    Re: Tool diameter compensation G41/G42 Post processor

    Vectric products do not support G41/G42 in their post processors (or anywhere else).

    You'd need to create profile toolpaths on the line and add G41/G42 commands manually to the g-code.
    Gerry

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

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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

  3. #3
    Join Date
    Jun 2015
    Posts
    109

    Re: Tool diameter compensation G41/G42 Post processor

    Hi
    I didn’t realise that, thought it was just a case of adding it in a similar way to the g43 command as my machine has linear atc.

    The reason for the request is that I use a lot of straight twin flute 6mm bits as I cut 12mm hardwood ply (lots of it)

    I buy bits from several suppliers but although the diameter is 6mm the actual cut does vary.

    So I thought by adjusting the tool wear parameter I could get away without changing the actual files.

    Guess that isn’t the case.

    Many thanks for your input.


    Sent from my iPhone using Tapatalk

  4. #4
    Join Date
    Mar 2008
    Posts
    1762

    Re: Tool diameter compensation G41/G42 Post processor

    The majority of design programs do nothing for cutter comp other than to output a toolpath that is the exact size of the cut geometry and allow placement of the appropriate Gcodes.

    The rest is done at your controller, using data from your tool database, where the radius of the bit is used to provide an offset to the cut geometry. If your controller support cutter comp, then you can add the code via a modification of thr VCPro postP.
    Gary Campbell CNC Technology & Training
    GCnC411 (at) gmail.com www.youtube.com/user/Islaww1/videos

  5. #5
    Join Date
    Mar 2003
    Posts
    35538

    Re: Tool diameter compensation G41/G42 Post processor

    The problem with adding the codes to the post, is getting a proper lead in move. If you add the G41/G42 to the end of the First_Feed_Move section, it might work OK.
    Some trial and error would definitely be in order.
    Gerry

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

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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

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