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  1. #1
    Join Date
    Oct 2002
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    NSW
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    1,610

    Default 3D print draws blood solving 1st world problem.

    My daughter brought home some woodwork parts to sand, and I asked what grit she had got to at school, but she said they just have to use whatever belt is on the sander.

    So I thought that the world needs a simple "belt grit indicator" ...

    Designed in OpenSCAD, printed on my Aldi 3D printer, and while adjusting the friction fit of the slide, I found that a 3D-printed number "40" can draw blood IMG_20180901_140144.jpgIMG_20180901_135831.jpgIMG_20180901_135802.jpgIMG_20180901_133011.jpg

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  3. #2
    Join Date
    May 2011
    Location
    Murray Bridge SA
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    3,339

    Default

    That's a nifty little device. You could be on a winner there, I can see a demand for something like that.
    How much would one cost to buy, as I'd really like one, maybe even more, preferably without the sharp edges.
    Kryn
    To grow old is mandatory, growing up is optional.

  4. #3
    Join Date
    May 2003
    Location
    Central Coast, NSW
    Posts
    3,330

    Default

    I never even knew there was a 140 grit paper
    Apologies for unnoticed autocomplete errors.

  5. #4
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    Oct 2002
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    NSW
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    Default

    Oops! I just used a loop to generate and position the text, rather than doing each label individually - I didn't do any research into grits available (and I've only changed the belt on the sander once so the whole exercise was rather frivolous overkill).

    As a result of your post, I've spent far too much time googling sandpaper grits, grit specifications, the 3 (or 4) common rating systems, and am now off to do V2 (with 150 instead of 140), and V3 (with "Coarse", "Medium" and "Fine")

  6. #5
    Join Date
    May 2003
    Location
    Central Coast, NSW
    Posts
    3,330

    Default

    I also think your application is terrific. It may be the only genuinely useful application of home-based 3d printing I’ve ever seen.

    I think V2 works for me. The problem with V3 is that terms like “fine” are subjective. I think of “fine” as being 600 and over, but others will think differently.

    Ps in case 600 grit on a linisher sounds unlikely, I have belts for a linisher like yours up to 800 grit - which I bought from a knife making supplier - and they are actually quite useable.

    Now you are making me wonder what I could do with a 3d printer. Or do I really have room for another machine in the shed?

    Cheers
    Arron
    Apologies for unnoticed autocomplete errors.

  7. #6
    Join Date
    Feb 2016
    Location
    Canberra
    Posts
    5,124

    Default

    Quote Originally Posted by Arron View Post
    Now you are making me wonder what I could do with a 3d printer. Or do I really have room for another machine in the shed?
    Yes.

    Yes you do.

  8. #7
    Join Date
    Apr 2013
    Location
    Sydney
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    1,557

    Default

    Quote Originally Posted by Arron View Post
    Now you are making me wonder what I could do with a 3d printer. Or do I really have room for another machine in the shed?

    Cheers
    Arron
    Dust my ears deceive me? As WoodPixel says, yes, the question should never have entered your mind.

  9. #8
    Join Date
    Feb 2016
    Location
    Canberra
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    Default

    Quote Originally Posted by Arron View Post
    Or do I really have room for another machine in the shed?
    I want to see pictures of this so-called "full shed".

    Id wager heavily I could find room with some careful re-arranging.

    ...

    ...

    On another seemingly amazing serendipitous coincidence, a person (hereby known as Evil MIL) broke her vertical blind on Monday. A 60 year old POS metal horror. Nobody, and I mean nobody, carried the parts for it. It was all four of the centring pulleys for the strings. Time, sun and friction had finally ablated them to dust. HAD I HAD a 3D printer it would have been trivial to print up new runners and pulleys in ABS and had it operational in an afternoon.... instead the Blind Company came, took it away, hacked in a fix (rough as GUTS) and charged her $280 for the privilege....

    THERE is another reason 3D printing should be at least in 1 in 10 houses

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