Saw off control surfaces

Discussion in 'Building Questions, Tutorials and Guidebooks' started by VALENGO, Sep 27, 2010.

  1. VALENGO

    VALENGO Member

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    I thought I had seen everything in modeling, but recently discovered in a website this technique to saw off control surfaces. At my 47 years old this was a novelty for me: sewing thread is used as a flexible cutting tool in a back and forth motion, there is almost no lack of material (the thread doesn´t "chew" plastic). When it breaks, simply unwind a little more and keep cutting. With time you can feel when the thread is near to break and anticipate.
    Only precaution: be sure that the piece is firmly attached before start, it tends to bend and shake with every stroke.
    Well, for me this was a "before and after", hope that it be useful to others.
     
  2. Airframes

    Airframes Benevolens Magister

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    It's a useful way to do some cutting, but control has to be tight if precision is required. Dental floss is better than standard sewing thread, but some razor saws will give an even finer, smoother cut, with less work involved.
     
  3. VALENGO

    VALENGO Member

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    I tried dental, but It gives a wider cut. About precission, I keep one side of the thread at 90° of the surface, and the other parallel at the line I am cutting and this way I get a good straight line.
     
  4. Wurger

    Wurger Siggy Master
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    I agree with Terry. But..I can say addotionally that making of separate control surfaces usually needs to add some plastic to these as leading edges.So the problem of how much styrene can be lost during cutting, is of no account
    practically.
     
  5. N4521U

    N4521U Well-Known Member

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    Goes right back to molding and casting......... see attached. I know it's a bit more work but it gives results like buying cast resin accessories.
     

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  6. VALENGO

    VALENGO Member

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    Well, as I´m working in an 1/32 I consider that the plastic lost is approximately correspondent to the gap between wing and ailerons, and I find this way of cut more funny and less hard than using knives (though I have well sharpened ones). In minor scales I agree: every cut is too wide.
     
  7. vikingBerserker

    vikingBerserker Well-Known Member

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    Never heard of this so thanks for posting it.
     
  8. Wurger

    Wurger Siggy Master
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    I see.
     
  9. Crimea_River

    Crimea_River Well-Known Member

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    That technique is news to me also. Might give it a try as I think my razor saw leaves too much of a gap in 1/48 scale.
     
  10. Rustybugs

    Rustybugs Banned

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    Never heard of this either. Will give it a try.
     
  11. looney

    looney Member

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    Isn't it impossible to keep the cut straight?
     
  12. Capt. Vick

    Capt. Vick Well-Known Member

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    What is the mold material big guy?
     
  13. DarrellC

    DarrellC Member

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    #13 DarrellC, Mar 9, 2013
    Last edited: Mar 9, 2013
  14. Crimea_River

    Crimea_River Well-Known Member

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    Hi Darrell. Your best bet is to upload pics from your hard drive. Make sure they are sized to no more than 800 pixels wide and resolution is down in the 250-300dpi range or less. In the Quick Reply menu box, you'll see an icon that looks like a picture, just to the left of the filmstrip icon. Press that and a window opens where you can select picture files for upload.
     
  15. DarrellC

    DarrellC Member

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    how do I resize them?
     
  16. DarrellC

    DarrellC Member

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  17. Crimea_River

    Crimea_River Well-Known Member

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