Ideal CNC

Discussion in 'Workshop Tips and Secrets / Tools' started by Atomic_Sheep, Dec 5, 2016.

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  1. Dec 5, 2016 #1

    Atomic_Sheep

    Atomic_Sheep

    Atomic_Sheep

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    If you could build a CNC for building planes the size of a Cessna 172, what CNC table dimensions would that translate to?
     
  2. Dec 5, 2016 #2

    Little Scrapper

    Little Scrapper

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    I needed a laugh this morning and this post supplied that.
     
  3. Dec 5, 2016 #3

    TFF

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    Are you going to make a one piece mold, or are you going to make up the plans from small pieces? What are going to CNC? Wood, metals, plastic, composites? Are you going to have any hand finishing or will all parts have to come out of the CNC finished? Are you going to have specialized CNC machines for specific jobs like 7 axis mills or table 3 axis. Mills? Plasma? Waterjet? How much money can you devote to the machines?
     
  4. Dec 5, 2016 #4

    Chris In Marshfield

    Chris In Marshfield

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    If it was me, and I was "kitting" a plane one day, I'd probably use a 4x12 (or larger) version of the Laguna Tools SmartShop CNC to turn rectangle-shaped aluminum sheet into airplaned-shape aluminum flat parts. It's mainly because I'm a sucker for a cool demo video and sales pitch.

    http://www.lagunatools.com/cnc/SmartShop
     
    Last edited: Dec 5, 2016
  5. Dec 5, 2016 #5

    ScaleBirdsScott

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    6x12x3 is probably the ideal work envelope for most anything without going to something wild like the cnc makes that build modular homes. You can trim that down as you see fit.

    Minimum would probably be 2x4 to be useful
     
  6. Dec 5, 2016 #6

    Little Scrapper

    Little Scrapper

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    I thought he was talking about building a 30' long CNC, which is why I was laughing.

    Carry on. Haha
     
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  7. Dec 5, 2016 #7

    Topaz

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    What's the size of the biggest part for which you want to make a mold/plug?
     
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  8. Dec 5, 2016 #8

    TFF

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    Scrap, you let him off too easy. ;)
     
  9. Dec 5, 2016 #9

    Little Scrapper

    Little Scrapper

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    I know. It's the new me. Ever since I gave up meat and became a vegan I'm like a totally different person.
     
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  10. Dec 5, 2016 #10

    TFF

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    Dang no meat, thats like saying your going to build a RV. Glad you can pull it off.
     
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  11. Dec 5, 2016 #11

    BJC

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    CNC is so passé; I'm holding out for a 40 foot X 30 foot 3-D printer that will print oriented carbon nano tubes.


    BJC
     
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  12. Dec 5, 2016 #12

    Little Scrapper

    Little Scrapper

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    I'm down 42 pounds now, feel better than I ever had. My knee pain is 100% gone.

    I was on the edge of heart attack and elected to not let them work on me. With my diet my numbers are dropping so well.the doctors are literally blown away.

    Anyhow. Carry on.

    I always thought a 1' x 1' CNC would be cool. A customer of mine built a 4' x 8' CNC for his wood shop. It's truly amazing, but he spent 2 years building it in his spare time.
     
  13. Dec 6, 2016 #13

    Turd Ferguson

    Turd Ferguson

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    I've been no meat, no dairy and no added oil for 4 yrs now.

    Don't fall into the junk food vegan trap and you'll be fine.
     
  14. Dec 6, 2016 #14

    Turd Ferguson

    Turd Ferguson

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    Do you want a CNC that mills? One that turns? I don't think you can build a CNC that allows one to load a 30ft billet of aluminum and cut away everything that doesn't look like a plane.
     
  15. Dec 6, 2016 #15

    FritzW

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    If this gizmo works out it wouldn't matter how big your parts are :)




    FWIW my machine is 4x8 (52" x 104") but it'll cut any length in 8' increments. I'm limited to about 40' because the distance from the end of the table to the garage wall is about 20'.

    Or, how about a Carvewrite machine? (post #20 here) It'll cut any length but it's limited to 14" wide and, IIRC, ~6" on the Z.

    2012-03-08 16 48 24 (2).jpg
     
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  16. Dec 6, 2016 #16

    rbrochey

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    Very cool :)
     
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  17. Dec 6, 2016 #17

    FritzW

    FritzW

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    It'll probably take a version or two before they get all the bugs worked out but I'm going to have to get one.
     
  18. Dec 6, 2016 #18

    mcrae0104

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    I always suspected you were a pinko. ;)

    But good for you. Coming to OSH, so we can all congratulate you on your 1/1/17 - 1/30/17 Cassutt progress? (And 2/1/17 - 7/21/17?)
     
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  19. Dec 6, 2016 #19

    fredoyster

    fredoyster

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    Um, a CNC what? I have a CNC mill with 12 x 50 inch travels, but I suppose you mean a CNC router. Or a waterjet? My guitar-building friends get CNC routers to fit the biggest sheet of material they can handle.
     
  20. Dec 6, 2016 #20

    Atomic_Sheep

    Atomic_Sheep

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    I don't think it would be possible to make a 1 peice mold for a fuselage unless you go really big, possible but a bit too big for what I'm hoping. I'm trying to make the smallest CNC machine that I can get away with for airplane construction but the largest one I can get for maximum versitility if that makes sense. Any mold can be made with smaller pieces. I'm thinking a CNC machine that would be able to make fuselage formers and wing ribs. But I could be overlooking something. In terms of materials, my research is pointing me in the direction of just woods, plastics and aluminium. Anything heavier than aluminium is staring to look unrelaistic.

    Budget wise, I don't want to spend more than 5000 for it. I've already got everything electronics wise, so it's just the machine that I'm working on.

    I've seen Laguna machines, but if I had to make a guess, they would be out of my price range.

    Ok thanks, will have a think about those dimensions.

    Haha, yes that would be nice or something that could produce sheets of graphene although I think graphene is a bit too brittle for anything uselful plane wise.

    If you want to lose weight, do cycling, it's on the top 5 list of best fat burning activities you can do. Diets are no fun.

    At the moment I'm thinking of just plain old 3 axis but with a large enough Z axis to allow me to add a 4th axis of sorts for turning but I don't think it would be possible to turn anything like steel with what I'm planning so turning isn't very high on my list. I think I'm aiming a few categories lower than what you're thinking.

    That's an interesting idea. A bit slow however and there also always the the other option of using offsets to make a piece larger than the table work area - this last point somewhat makes my original question moot, but I would still like to make something as practical as possible.

    Yes a CNC router.
     
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