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Thread: Making Rotary Patterns

  1. #11
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    Quote Originally Posted by bergerud View Post
    Looks pretty good but it looks like the depth was not right. The carved bishop looks smaller than the scanned one. Any idea why?
    You're correct! I probably should have reduced the depth rather than accepting it "as is". However, on the other hand perhaps I should raise the height from 100 to 990 or some of both.
    It was just my choice for this test.
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  2. #12
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    Default Old English - Davis chess pieces

    The Old English - Davis chess pieces are posing some problems. I re scanned just the King and Queen Friday morning and have carved it twice at two different depths. The first was at .600. The original detail, on the actual pieces, was/is not the best contrast. My first run, at .600 netted a narrow carve, about half the bulk of the original. The 2nd, at .300 gave me back the bulk but washed out the detail. I'm using 990 on all the heights during my tests. Saturday, I'll run at 500 and see how that test works out.

    From what I've seen so far, I'm wondering if it might be best to scan larger models to compensate for the loss in size in transition. My Saturday test may verify my thinking. I know how the manage larger dowel in the existing jig, and may try that aspect after I run this next test.
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    7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"

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  3. #13
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    I do not know what the rotary jig procedure actually is. I assume the procedure touches the bit on the bottom board and not the dowel.

    If it touches on the board and then you install the jig and re clamp, the depth of the dowel below the head may be different than the depth the board was. The rubber compression rollers may compress more on the jig as they did on the board, the dowel may not be exactly flush with the top of the jig, and so on.

    There should be no reason why the Carvewright should not be able to scan and duplicate those chess pieces. You may need to find a way to reproduce the same clamping depth. As a test and possible procedure, push the bit by hand down to the board before you insert the jig. Now as you clamp down the jig, does the bit touch the dowel? I'll bet that the bit touches the dowel and then gets pushed up by the difference you have experienced.

  4. #14
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    Quote Originally Posted by bergerud View Post
    I do not know what the rotary jig procedure actually is. I assume the procedure touches the bit on the bottom board and not the dowel.

    If it touches on the board and then you install the jig and re clamp, the depth of the dowel below the head may be different than the depth the board was. The rubber compression rollers may compress more on the jig as they did on the board, the dowel may not be exactly flush with the top of the jig, and so on.

    There should be no reason why the Carvewright should not be able to scan and duplicate those chess pieces. You may need to find a way to reproduce the same clamping depth. As a test and possible procedure, push the bit by hand down to the board before you insert the jig. Now as you clamp down the jig, does the bit touch the dowel? I'll bet that the bit touches the dowel and then gets pushed up by the difference you have experienced.
    Once you obtain the Rotary jig, you will understand the the process.
    The bit touch-down is consistant with the edge of the dowel. My post #12 was simply a record of using the various test depths to give myself, and others, some insight on how the how to determing the actual depth you may wish to use when carving the dowel.
    I'll repeat an old Tool Makers adage for a lathe type cut: "The depth you use, twice you'll lose!"
    AskBud Downloads =>> CLICK HERE
    Lesson added
    7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"

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  5. #15
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    Default Branching out to larger stock

    I'm finding that I can scan larger rotary items by making 3 inch discs and mounting my model to them. Once scanned, I can apply the pattern to 2 inch or larger dowel. Modification of the rotary jig can be done without changing the integrity of the product.

    Here is a photo of my Roman Senator testing.
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Name:	ROTARY Roman Senator.JPG 
Views:	219 
Size:	462.4 KB 
ID:	50347
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    Lesson added
    7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"

    CW Vacuum Head Project =>> CLICK HERE
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    More than 1250 AskBud patterns
    vvv-CLICK BELOW-vvv
    http://store.carvewright.com/manufac...ufacturerid=29

  6. #16
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    That came out great!
    Thanks
    Tom Watson
    Two CW's and D.C.-Top Mount Insert @ Ringneckblues.com Get the dust out!!
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  7. #17
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    Default Another Knight and Queen

    Here are two more Rotary patterns (Knight and Queen) that will be in the Pattern Depot soon.
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    Click image for larger version. 

Name:	Rotary-Knight and Queen.JPG 
Views:	189 
Size:	428.6 KB 
ID:	50660
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    Lesson added
    7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"

    CW Vacuum Head Project =>> CLICK HERE
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    http://store.carvewright.com/manufac...ufacturerid=29

  8. #18
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    Nice work Bud
    " The Hurdier I Go, The Behinder I Get"

  9. #19
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    Default Rotary Bishop or Tower

    This rotary scan may end up being a Bishop or just a tower, in the Pattern Depot, when I finish my current test carve.
    AskBud
    Click image for larger version. 

Name:	Rotary-Bishop or Tower.JPG 
Views:	203 
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ID:	50679
    AskBud Downloads =>> CLICK HERE
    Lesson added
    7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"

    CW Vacuum Head Project =>> CLICK HERE
    AskBud Home Page =>> CLICK HERE <<=PC lessons or CW lessons

    More than 1250 AskBud patterns
    vvv-CLICK BELOW-vvv
    http://store.carvewright.com/manufac...ufacturerid=29

  10. #20
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    Outstanding Bud ! Love the pateena.


    Capt Barry

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