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First 3D Carving Project on Hardwood

Discussion in 'CNC Mills/Routers' started by Scott Thompson, Aug 11, 2021.

  1. Scott Thompson

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    This project turned out pretty good except for the artifacts seen in the photos. I used a 1/16" tapered bull nose. Did I set up the machine wrong or is this normal for hardwood (oak I think)?

    20210809_171136 (Medium).jpg 20210809_171136 (Medium).jpg 20210810_113453 (Medium).jpg 20210810_113546 (Medium).jpg 20210810_113615 (Medium).jpg
     
  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Be patient, help will come. I don’t have the answer but sooner or later someone with the answer will chime in.
     
  3. Scott Thompson

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  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Generic reply, but should cover it:
    - play with speeds and feeds and other cut parameters - something might just be a little off
    - try a different material
    - is the endmill the correct geometry / flute count for your material
    - is the endmill sharp
    - do a final cleanup pass
    -
     
  5. Scott Thompson

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    Thanks for the advice Peter. A few comments regarding your reply. The End Mill is brand new and has two flutes. A finishing pass sounds like a great idea. To do a finishing pass would I simply rerun the same G-Code or would I modify it somewhat?
    Thanks,
    Scott
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Depends on the setup and CAM

    The right way is to leave a little stock, and CAM up a finishing pass properly. Rerunning it may work - but less ideal - also depends on how well you will be able to reestablish Zero/Origin too
     
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  7. Giarc

    Giarc OpenBuilds Team
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    Nice piece of wood, but not oak. ;)

    Did you only use the 1/16" inch ball nose, or did you rough it out with a larger one? What software are you using?

    When I do carves, I rough it out with a 1/4" (or larger if it is a big project) ball nose and it removes most of what needs to be removed. Then I follow up with a 1/8" ball nose for the finishing pass and usually it will be 90 degrees to the roughing pass. Rarely have I needed smaller than 1/8" ball nose. On small projects I have used as small as a 2mm ball nose for the finishing past. Yours looks like it has a lot of small details so the 1/16" was probably the right choice.
     
  8. JustinTime

    JustinTime Veteran
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    I noticed that the problem is on the bottom of the Y axis mostly, nothing on the top. Could it be a deflection of the bit do to the grain of the wood?
     
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  9. Scott Thompson

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    Giarc,
    Thanks for responding to my post. Hers are the answers to your questions:

    Nice piece of wood, but not oak. ;)
    Oh can you tell me the species?

    Did you only use the 1/16" inch ball nose, or did you rough it out with a larger one?
    Yes … roughed out with a 1/8" end mill

    What software are you using?
    Carveco Maker formally Artcam

    Regards,
    Scott
     
  10. Scott Thompson

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    Not sure but I am having problems with the Y axis. The machine is a LEAD CNC 1510 and I am getting a lot of lead screw slap because the leads screws are not under tension. I am trying to purchase a tension kit like the Tingle Tension System but so far not luck.
    Scott
     
  11. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Rick 2.0 likes this.
  12. Scott Thompson

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