From a picture of an Amish toy, this was designed using Inkscape. The design was not flexible since it depends on the material thickness due to unknown engrave depth. (Found out hard way when it was scaled up to a larger tray with a new sheet of Baltic Birch.)
May be useless toy, but it works!
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I can watch that a few times! How fun!
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I like it.
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It allows you to make variable width slots that can fairly easily handle different-width materials. It just requires thinking ahead as you make the SVG.
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Fun!
You’ve got step 1 for a Rube Goldberg machine!
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That is so awesome. Great job!
So rad!
LOVE IT. I’m a sucker for any marble kinetic thingy.
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This looks awesome 
sigh Another Rabbit hole to make… 
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Is it was useful they would be calling it a tool. I can easily imagine folk inventing a vending machine from watching it, or manufacturing., or a very deep rabbit hole
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That’s really fun!
I love it! But how do you make that last marble go in?
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Not sure about your question. Nine marbles were initially in the tray to save video time. The tenth marble was loaded and machine was started. All ten marbles were successfully delivered to the box.
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Oh! I watched it twice and couldn’t tell that the last one went in. In any case, it’s a marvel of engineering and thanks for sharing it with us.
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Beyond cool! 
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Is the video broken already?
Video still working OK.
I see it not… 
Tried opening the address to just the video, says its private now.
I have no idea how this happened or how to fix it. Any suggestions?
As an over-90’er, I have no experience with these sort of problems.
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