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  1. #1
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    Default Help needed converting 3d Sketchup to CNC .dxf format

    Want to research here before submitting to AirTasker.

    I've made a number of attempts at cutting my own 5 pointed star.
    To be used as a large fruit bowel or Christmas decoration.

    I've never been able to build one with enough accuracy.

    So this year instead of having another go,
    I'm researching how to get it to the CNC stage.

    First step is to get it into a CNC recognisable file in .dxf format.

    I've got a SKP file for the bowel and another two skp files: one each for the left and right segments of a point.

    Is there anyone I can send these to where we can convert these into something (like the proper perspective)
    that the CNC operators will know how to use?


    Any help would be greatly appreciated.


    nb: .dwg and .dxf
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

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  3. #2
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    Default

    What version of Sketch-up do you have? Sketch-up Pro can export as DWG or dwg files apparently.

    https://help.sketchup.com/en/article/3000165

  4. #3
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    Default

    Hi Lappa,
    Thanks for the reply.
    Yes I can save as .dwg and .dxf
    I'm looking for someone in the CNC business who can tell my what I need to provide from Sketchup (as in aspect) for a CNC machine.
    It's a complex project that may not be able to be done by any normal CNC machine.

    Preliminary quick chat with my CNC guy who mentioned his CNC could only cut to certain angles.
    Was hoping he could adjust the angles to fit his machine to give me my project.

    I was super happy and very surprised with him saying he'd have a look at it.

    I'm wouldn't be surprised if it's in the too hard basket for most if not all.

    Keeping my fingers crossed.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  5. #4
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    Default

    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  6. #5
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    Default

    Yep. Heard from my CNC guys.

    Way too hard.

    Too many angles the CNC machine can't manage.

    Bummer.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  7. #6
    Join Date
    Feb 2003
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    back in Alberta for a while
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    Default

    Barry

    do you want a post a copy of the design so that the brains' trust can examine and possibly offer a solution
    regards from Alberta, Canada

    ian

  8. #7
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    Default

    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  9. #8
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    Default

    The plan was to make quite a few and give them as Christmas presents.

    I started working on this in Feb 2015.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  10. #9
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    OK
    your star consists of 3 pieces
    1 x base -- would be tricky to cut on a table saw, but relatively trivial to cut out on a band saw.
    5 x right side of point
    5 x left side of point

    I'm thinking forget the miter gauge and make a set of jigs.

    But it's after 10PM here, so more tomorrow evening.
    regards from Alberta, Canada

    ian

  11. #10
    Join Date
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    Glen Iris, Vic, Australia
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    One step at a time.

    I already have a plan for the bottom.


    https://www.youtube.com/watch?v=DeOJXIXBAHg

    "The key here is to make make sure you get this angles absolutely precise"
    "And it will go together perfectly"

    LOL


    And this will mess with your head:
    https://www.youtube.com/watch?v=N7hckWV84pM


    Completely out of my league:
    https://www.youtube.com/watch?v=BNqIXp2rnPQ

    Out classed:
    https://www.youtube.com/watch?v=3lZEJWgOl6s



    https://www.youtube.com/watch?v=M2Hy7Tlm2_I

    https://www.youtube.com/watch?v=VcJUSAaFGD0&t=3s

    https://www.youtube.com/watch?v=N7hckWV84pM&t=44s

    https://www.youtube.com/watch?v=DeOJXIXBAHg&t=134s
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  12. #11
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    Default

    This guy gets me:

    How to tune your table saw. Dial indicator, incra mitre gauge and miterset. Dave Stanton woodworking
    https://youtu.be/12f3P6hRLFQ


    How to Make a Table Saw 3 in 1 Micro Adjustment and Alignment Jig
    https://www.youtube.com/watch?v=KWWoGBaMkD0
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  13. #12
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    Glen Iris, Vic, Australia
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    Default

    Links updated

    Quote Originally Posted by barrysumpter View Post
    One step at a time.

    I already have a plan for the bottom.

    How to Make ● a STAR from Pallet Wood
    https://www.youtube.com/watch?v=DeOJXIXBAHg

    "The key here is to make make sure you get this angles absolutely precise"
    "And it will go together perfectly"

    LOL


    And this will mess with your head:
    Geometry of a 3D wooden star
    https://www.youtube.com/watch?v=N7hckWV84pM


    Completely out of my league:
    https://www.youtube.com/watch?v=BNqIXp2rnPQ

    Out classed:
    Compass Rose - Woodworking How To Project
    https://www.youtube.com/watch?v=3lZEJWgOl6s


    Pallet Wood Stars
    https://www.youtube.com/watch?v=M2Hy7Tlm2_I

    Pallet wood Star - woodworking project
    https://www.youtube.com/watch?v=VcJUSAaFGD0&t=3s

    Geometry of a 3D wooden star
    https://www.youtube.com/watch?v=N7hckWV84pM&t=44s

    How to Make ● a STAR from Pallet Wood
    https://www.youtube.com/watch?v=DeOJXIXBAHg&t=134s

    Country Pallet Christmas Star - Inspired by DiResta
    https://www.youtube.com/watch?v=sw2HLXa2yFY&t=834s
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  14. #13
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    Feb 2003
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    back in Alberta for a while
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    Default

    Hi Barry
    I had a bit of time in the garage and had a play with your dilemma
    Quote Originally Posted by barrysumpter View Post
    Quote Originally Posted by barrysumpter View Post
    The plan was to make quite a few and give them as Christmas presents.

    I started working on this in Feb 2015.
    as I said earlier, I think the solution is to forget the miter gauge and the compound table saw angles that are doing your head in and make up a set of jigs.

    Your star consists of 3 pieces, today I made up an example of the jig I'd use to cut the right side of each point.

    Step #1.
    Make up a block that contains the layback angle you have adopted for the sides. I was working with a small block so adopted about 30 degrees.
    You might want to use something like 45 or even 60 degrees. The block you start with needs to be rectangular in cross section and long enough to support the sides.
    Help needed converting 3d Sketchup to CNC .dxf format-step-1-jpg

    Step #2
    attach the block to a table saw sled much like what this guy does in this video. https://www.youtube.com/watch?v=N7hckWV84pM
    after you pass the sled through the saw you should have a sled with support block that looks like this (I didn't mount the block onto a sled as I just wanted to show the orientation relative to the saw blade.)
    Help needed converting 3d Sketchup to CNC .dxf format-2-jpg


    Step #3
    Chamfer the sides so that the bottom will lie flat on the sled.

    Step #4
    Support a bowl side on the block as you pass the side and the sled trough the blade.
    Help needed converting 3d Sketchup to CNC .dxf format-3-jpg

    After cutting the mating side you will be able to glue up a joint looking like this.
    Help needed converting 3d Sketchup to CNC .dxf format-joint-jpg


    I'd probably make up 12 angle blocks. Which could all be cut from one long piece of rectangular stock.

    I'd use 2 of the blocks on the table saw sled, and the other 10 to make a jig for the glue-up stage.
    Attached Images Attached Images
    regards from Alberta, Canada

    ian

  15. #14
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    Default

    Should be able to have a look next week.

    Finishing up some Christmas decos for the house.

    Then checking mitre slot to saw blade alignment on the contractors table saw.
    Then checking the fence alignment.
    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

  16. #15
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    Default

    Thanks,
    Barry G. Sumpter
    May Yesterdays Tears Quench the Thirst for Tomorrows Revenge

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