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Thread: 3D Puzzle's

  1. #1
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    Default 3D Puzzle's

    Done these recently...

    Resized_20200204_132310.jpg

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  3. #2
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    They look good where did you get the plans from or did you do them yourself?

  4. #3
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    Quote Originally Posted by BobL View Post
    They look good where did you get the plans from or did you do them yourself?
    Thanks....got them from makecnc.com

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    Can't see burn marks so I'm assuming it's a router and not a laser. How did you hold everything down? Vacuum table?

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    Quote Originally Posted by elanjacobs View Post
    Can't see burn marks so I'm assuming it's a router and not a laser. How did you hold everything down? Vacuum table?
    Yes router with a 1mm endmill. Just strips of double side tape...

  7. #6
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    I imagine double sided tape would be about only way.
    Vacuum does not work well for small pieces.

    I broke my only 1mm endmill before I could really use it, what cut depth and speed if you don't mind sharing?

  8. #7
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    Vacuum can work for small parts, but you have to zone it properly and be a bit tactical with how you cut

  9. #8
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    Quote Originally Posted by BoneInspector View Post
    I imagine double sided tape would be about only way.
    Vacuum does not work well for small pieces.

    I broke my only 1mm endmill before I could really use it, what cut depth and speed if you don't mind sharing?
    I cut through the 3mm mdf with one pass at 3.4mm at 18000rpm and feeding 600mm/m....

    - - - Updated - - -

    Quote Originally Posted by elanjacobs View Post
    Vacuum can work for small parts, but you have to zone it properly and be a bit tactical with how you cut
    True, that will be the next thing i need to sort out

  10. #9
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    The trick is to leave everything attached for as long as possible; back when I was running a big CNC router I used to cut a full sheet of parts, leaving about 1mm at the bottom of the cut and then go back over and cut everything out. This meant that I had full vacuum to hold the sheet while doing all the heavy cutting, but only a tiny amount of tool pressure as the parts were separated from the sheet so they didn't shift around.

    Using this method means you can keep your normal speed/feed, so there's no extra heat and tool wear from running slower, but you also get to keep all your parts.

    IMAG1543.jpgIMG_20191209_212010.jpg

    Obviously, I had a LOT of vacuum to play with (10hp pump, sometimes making up to 9 tonnes per square metre of negative pressure), so you might need to fiddle with speed and depth for your separating pass, but that's the general idea. Using a down-cut spiral for your finish pass will also be a big help with keeping things stuck down if you're able to swap tools easily.

  11. #10
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    Thanks for the tips. I have a vacuum table from a German supplier. It did not do enough research on it. Now it's stripped and in storage atm. I might make one myself sometime.

  12. #11
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    The things you learn. I'll keep it in mind if I ever go the vac route.
    I actually use masking tape on the bed and workpiece and simply superglue the back of the tape together. A lot cheaper than double sided tape.

  13. #12
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    Your tape idea sounds great, did you use masking tape?

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    Yup, the 32mm stuff from bunnings. Bear brand, 3M is better and nothing needs to be fancy about it.
    Then the cheapest superglue I can find.

    Only thing is that you need to remember the 0.2mm lift to the workpiece, which in many cases helps me as it means I can cleanly cut the wood without eating my wasteboard.

    Link to a you tube vid showing how it's done, plenty of others out there.


    YouTube

  15. #14
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    Quote Originally Posted by BoneInspector View Post
    Yup, the 32mm stuff from bunnings. Bear brand, 3M is better and nothing needs to be fancy about it.
    Then the cheapest superglue I can find.

    Only thing is that you need to remember the 0.2mm lift to the workpiece, which in many cases helps me as it means I can cleanly cut the wood without eating my wasteboard.

    Link to a you tube vid showing how it's done, plenty of others out there.


    YouTube
    Thank you, this is a great idea

  16. #15
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    Installed a better dust extraction setup. Will install a bin full sensor and automate the setup next

    IMG20200324143654.jpg

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