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Tabs in operation not showing up in G-code

Discussion in 'CAM' started by Jimius, Jul 29, 2019.

  1. Jimius

    Jimius New
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    I'm using the openbuilds cam to generate a vector with a 1 pass final depth cut with tabs. The tabs however are not generated or shown. Even when going to a 2 pass cut it won't show. Am i doing something wrong?
     

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  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Tabs are done on multiples of a pass. So if you have 1 pass 8mm deep, you cannot have a 4mm deep tab. You can either run 2x 4mm passes, or have a 8mm high tab
     
  3. Jimius

    Jimius New
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    Thanks for the reply. However I've tried both methods before, without result. The folowing settings do not generate tabs for me.
     

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  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    At this time, I would recommend playing with values till it does: (or post the workspace export, screenshots alone may be pointing at the wrong thing, for example, maybe its a circle and there is no straight sections long enough to put the tab in, or you need to play with tab width/spacing - trial and error needed sometimes)
    Works for me:

    tabswork.PNG
     
  5. Jimius

    Jimius New
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    There are no straight edges on the shape I'm trying to cut. I guess that is the problem. Thanks for the help!
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Indeed, need a segment long enough to fit an endmill, and the width of the tab you want, to place it in :)
     
  7. mO Cooper

    mO Cooper New
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    So openbuild project will not have tabs unles it’s all straight lines?
     
  8. Alex Chambers

    Alex Chambers Master
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    It can only have tabs if it has some straight lines. Can't put a tab on a curve.

    Alex.
     
  9. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Not all straight no. But somewhere a straight little section that meets the required distance to fit a tab with the parameters you provide (which you can play with - smaller tabs, or closer spacing etc)
    play with the numbers - it will honor what you tell it to. If you have a 25x25x25x25mm square but set spacing between tabs to 100mm - it can't place one because the entire cut length is less than spacing+tabwidth.

    Post a workspace export and I'll check your setup for you (File > Export Workspace in OpenBuildsCAM)
     

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