Message 47 of 352

Soma Cube

OK, so I've finally started on my puzzle making. I thought I'd start with something simpler than a burl and the book I have also has the < href="http://www.puzzlemethis.com/cgi- bin/puzzle/SQR00014"/Soma Cube (not from the book, just an example image.)

The pattern I have builds up the pieces from individual squares. So, I think to myself, how hard can it be to make squares? All I need is 27 of them, all identical.

Ok, you can stop laughing now.

The author shows a jig (a sled) in his book and so I make that first. The first cubes aren't nearly as cubical as I thought they would be. I check the alignment on the table saw and it looks OK. Hmmm. Ah, here's the problem - the front of the sled isn't quite square to the blade. Not wanting to rebuild the sled I fix it by turning it upside down and running the front face against the blade, just peeling off the minimal amount.

Since this is a practice piece, I want to go large with it. We replaced all the dark stained pine in our house with oak, so I have the 2x2 balusters from the steps to play with. I run them through the planer to get them square and peel off the old finish.

I change the blades in the planer because I missed a nail.

I said you could stop laughing. Any time now.

Thank you.

No giggling either.

I now have 27 (well, actually 30) identical (or very nearly - some will need a small amount of touchup sanding) cubes.

If there's any interest I can post up a picture. Not much to look at now, just some pine cubes.

I think I'll donate this one, when it's done, to the long term care facility where my wife works since it's made out of fairly large cubes. Easy for older hands to handle.

Not sure what kind of finish to put on it - I'm thinking either a wood stain, or perhaps a color stain (not paint) of some kind. Suggestions would be welcome.

Thanks for listening.

And for quietly chuckling and avoiding laughing out loud until I left the room :)
photo of madcoder42
Replies 1 - 10 of 30
Here's a picture of the cubes, assembled but not glued, against a classy orange construction paper background.

I just realized something - I need to invest in some quick clamps if I'm going to be doing much of this :) Presuming I'd like to assemble more than one piece at a time, that is.

Especially since I only need light clamping pressure the stuff I have now is a) too big, and b) way too heavy duty.

photo of madcoder42

2 months ago
Well, I love your humor and your "stick-to-it-iveness" . But I have to say...First, this would make a great gift for the elderly and 2nd, as to your photo I need to say this is a great composition....well balanced... colorful... interesting subject pieces.... I would love to put this in photoshop and tweek it into an abstract pix......

As to a clamp.... I'm sure Mass will have a great idea... he and his metal toys....

Keep going.... it's looking great!!!
photo of jazzyplayer

2 months ago
Well, they're all glued up now, but obviously not dry. I'll not be messing with them anymore until tomorrow.

I've not done this kind of woodwork before and I was surprised at how well a thin layer of glue worked. It was almost like a suction sort of thing once I pressed them together.

I'll need to pick up a single edge razor blade or sharp knife somewhere to trim off the small bit of squeezeout I got in a couple of places.

Oh, and since I apparently messed up the URL for the picture of the Soma Cube I'll post in a different one here that shows it to a bit better advantage.
photo of madcoder42

2 months ago
Thanks for the link Mad.
It is going to take a lot of precision to build the project. The smaller the pieces the more precise you'll need to be. Consistent application of glue will be important.
Your suction discussion reminded me of how the oldtimers used hot hide glue. They would apply it to both pieces and then rub them back and forth to get rid of the air and the parts would self hold in position. You could also use cyanoacrylate glue and a booster to quick fix the parts using your hands as the clamp (just don't glue yourself to the puzzle).
I'd suggest aniline dyes. they come in lots of colors and you can pre-dye, then glue up.
I'd love to see a video of you solving the puzzle too!
Great story - thanks,

El
photo of eldamatic

2 months ago
Precision - you just had to go and mention that, didn't you? :)

I assembled it this morning without any touching up and while it fits together, it doesn't do it as tightly as I'd like.

There are a couple of reasons for this:

* There are still a couple of squeezeouts present
* some sanding needs to be done as there are some very small overhangs.

For the most part I think the overhangs are partially due to the clamps I have. Some, perhaps most, is also due to lack of acquired skills, but I think I need to do something about the clamping situation first.

Since I've not done much wood working on a finer level, the clamps I used were these:
(Jorgensen 3706). From what I can tell there were three disadvantages to these:

* difficult to adjust while keeping pieces aligned
* twisting motion of the screw mechanism
* canting of the clamp jaw as it tightens

Mind you, I'm not trying to diminish the effect of the "skills" element, but I do think it added to the difficulty of getting a good result.

I'll post up a picture of the assembled cube once I trim it up a bit and I'll see what I can do about the assembly video (I presume you meant assembling the puzzle and not the assembly of the individual pieces), but I don't think I'll have too much time today for that.

Thanks all for your thoughts and your patience as an amateur comes among you.
photo of madcoder42

2 months ago
Madcoder, those screw type clamps are tough to use on small parts. The ratcheting type are much better. Glue squeeze out can be wiped away with a damp cloth before it hardens. If you're going to stain, may I suggest you do so before glue up. Stain doesn't take well to surfaces where glue has penetrated.
Another trick, get yourself some wax paper to lay the parts on while drying. This keeps any missed squeeze out from bonding to your work table.
photo of Thunderhead

2 months ago
You folks mind if I pick your brains for a bit?

I'll go ahead and ask, presuming you'll say it's OK :)

Yes, I was just in the store looking at clamps. Found some small Irwin ones (the ratcheting kind) that looked like they'd do the trick. I'm going to head out to their site to see if they have smaller ones. I'm all for supporting local businesses, but only when they have what I need.

Now, as to staining/dyeing the wood. I was looking at aniline dyes online and see that there are 3 kinds - alcohol, water, and oil. First off, for the most part I intend on doing these sorts of puzzles in hardwoods/exotic woods and just putting a finish on them. There are some potential applications (for example: the nursing home, local schools (in school colors), etc) where using a plainer wood (select pine?) and dyeing would work out OK.

Now, keeping in mind that I have a distinct lack of experience here and researching online can get you any and all opinions on all sides of any question and you don't really have any idea what sort of expertise the folks putting forth their ideas have, I'll post up a couple of thoughts here and be very receptive to your advice.

In the book I have (Crafting Wood Logic Puzzles, Charlie Self) he recommends using a penetrating oil finish as it doesn't build up on the surface which is important for close fitting puzzle pieces. And he mentions other finishes that could raise the grain which could cause the same sort of issues.

Given that, it appears to me like aniline dyes dissolvable in alcohol would be a good choice if I planned on coloring blocks. Thoughts?

I agree that if I plan on staining/dyeing it would be good to do so earlier in the process. The reason I have squeezeout is that the author says that wiping it off can smear it and make it more difficult to finish later (well, the real reason is too much glue, but you know what I mean :)

So, any thoughts any of you experienced folks have to the above discussion or any other thoughts on finishing items that get a lot of handling will be very much appreciated.
photo of madcoder42

2 months ago
Pickin' brains is what we're here for, but when it comes to finishes, I'll bow to our more artistic members.
photo of Thunderhead

2 months ago


Here's an abstract for you!!!!
photo of jazzyplayer

2 months ago
Another abstract!!!!

photo of jazzyplayer

2 months ago
Replies 1 - 10 of 30