Step 4: Assembling the Wood Structure

First you will put the legs of the structure into their predrilled holes.  Fill each of the four holes with wood glue and then set the legs into the holes.  To help stabilize these legs while the wood glue dries you can use a dab of hot glue (comes off readily) on a piece of wood and glue it to both the base and each leg (see picture two).  You will take this piece of wood off once the wood glue dries.

Next, (this can be done before the wood glue dries as well), glue the two smaller top pieces into place.  This will also help ensure that the wood legs dry straight and the proper distance apart.

Once the wood glue has dried for the most part (not necessarily completely, but has stabilized enough) glue the long top piece into place.

Once that is completed wait for 24 hours until the wood glue dries completely.

Be sure you keep an eye on this structure, if you notice a leg tilting use more wood or a string to stabilize it! Don't underestimate the importance of the structure's stability.
<p>You have 15 balls and only 13 measurements. What are the last 2 measurements? Also how did you attach and adjust the strings to the wood?</p><p>Thanks</p>
<p>Hi, awsome project. After going over the process described, how far apart are the individual balls</p>
Hi, how long are the strings, that's critical, in fact that's the whole ball game
<p>How big are the ball bearings?</p>
Where did you buy ball bearings?
You drilled round holes for the sqaure legs, how do you fit a suare leg into a round hole
<p>You can make the round holes as large as possible, so you can fit the legs in it. Later on, you can fill the rest of the 'holes' with wood filler. </p>
<p>Hey! I really love what you did! I still have a question though.. Do you know what the diameter of these ball bearings are? I'm doing a project at school about this construction so I really need your help (or maybe the help of someone else). And sorry if my English isn't the best, I'm from Holland.</p>
Can you make a YouTube video about this
Hi, where did you get the ball bearings?
What did you use to fasten the brads down and keep the string taught? <br> <br>
That is really awesome! Definitely going to be my Christmas holiday project.
do you remember where you bought the gold brads from? <br>
Hobby Lobby, but I am sure most Craft Store's sell them in the scrap book section.
Very nice instructable. I also made one of these for my dad recently for his birthday. <br> <br>My method was slightly different, as the wave was designed to be viewed from above rather than the side. Essentially, I had the constraint that for all pendulums, L*sin(&Icirc;&cedil;) = constant. This is an extra complication for many, I am sure. I will be sure to link to your instructable when I post mine for those who want to take a more straight-forward, side-viewable approach. <br> <br>Good job! :)
Is each string twisted around a brad and then another string twisted around it and sent down the same hole?<br>help!!
Sorry for taking so long to reply, the strings are actually pulled through the hole from the bottom and then the brad is put in to plug the string in place. So, at the top you should see both ends of the string poking through. Hope this helps!
Thanks for replying...yes it helps...so did you take a video of your pendulum wave...would love to see how it goes :-)
please may i have close ups of how the strings are fixed? i'm confused..it looks like a 'V'...so how is it done...could you take close ups of the under side and run me through with an from A point to b point to c point .... please pretty please?<br>is it one long string? how does it go?...down the pole...through the nut..then back through the first hole or 2nd hole? do you knot it or send it down a 3rd hole?<br>as you can read i'm pretty confused! please help ..i'm trying to make one with marbles .
Here is the photo:
I tried to answer this above, here is a closer picture, I hope the picture makes a bit more clear.
Do you think puting something like a guitar tuning key to adjust string legth will be useful?<br>
I never thought of that but that would be a really good idea! That way if it gets &quot;out of tune&quot; so to speak you could quickly adjust it. I glued the strings in place to ensure that they wouldn't move around, but this is a good alternative as well!
we actually saw a video of this type in my chemistry class. i am forwarding this to him after this comment is posted. awesome job
The world demands a video!
Coming soon!
I love these. Two points to emphasize for people building their own: Using the double strings (the V) is essential. Use single strings, and they will tangle after about 3 swings. Second, the more rigid the frame they hang from, the longer they will swing.&nbsp; Yours looks good.&nbsp; (I built one as a trophy, and used single strings, and a somewhat wobbly frame.&nbsp; Set it going, and it tangled after the aforementioned 3 swings, and until I stiffened the frame, would damp out after a half dozen swings)<br> <br> If you want to see one (not this one)&nbsp; in action, go to&nbsp; <a href="http://www.youtube.com/watch?v=yVkdfJ9PkRQ" rel="nofollow">http://www.youtube.com/watch?v=yVkdfJ9PkRQ</a> to see a demo of one built by someone at Harvard.
Great Points! Thanks!

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