Thursday, May 2, 2013

No Comment #2 - Tapered Octagon

The tapered octagon piercing through the shaped demi-lune top of the Tim Burton table (formerly known as No Comment #2) involves the nemesis of most woodworkers: compound angles (the stair builders are laughing right now...)

True, compound angles are more complicated than square cuts with a square blade by a square woodworker :) ("triple square cuts"), but some techniques can make them really easy to work with and get great results.

In this episode, a large part deals with cutting and Domino-ing the triangles that make up the tapered octagon along with some tips on eye-balling the cut with an angled fence and how to recover from Dominoing with a less than perfect bevel angle setting.  The Domino trick actually comes in really useful in the triple-square arena as well.

There was a lot of interest in the new-to-me technique of using the Domizilla to mortise through multiple parts simultaneously; the process is really easy (though I over-explain, I know), but saves on a lot of awkward calculation of other compound angles.

Next up will be a short video on how to measure a compound angle off a project; this is really useful when you are making an n-sided object... make n-1 sides according to your formula and tool settings then calculate the last perfect-fitting piece directly off the rest.  The savings in caulk alone make this worthwhile to learn!

The video refers you to the Angle Madness Jigs video if you want to know more about cutting miters with triangles.

Sorry it's longer than I expected... jeez, it's just a tapered octagon!

As an aside, apparently all my friends had very very bored parents in August because we just had a string of 12 birthdays to celebrate.  Nice full social calendar; completely bumped video editing :)  Hey, at least it was for very pretty, I mean, very good reasons!


  • Peter Durand said...

    Great video. As usual! You just solved a wee problem I was having in the shop..thanks.

    BTW, do you have a link for that new laser? I am in the market for one.



  • Anonymous said...

    Wow - loved how you walked through those steps.

    How much time from beginning planning to finished table?

    thanks for sharing -


  • HalfInchShy said...

    Glad the video solved a problem for you, Peter, although you have a master carpenter just 4 miles away from you who may like to lend you his expertise and maybe his ax.

    Leica makes a number of great lasers. I got one from a FOG member who was selling his because he had an even more expensive advanced model, but he uses his daily. This model I got is the Leica LINO L2. Comes with a metal tripod you can attach to about anything and magnets to anchor it as well. Use that as a start and drift around the similar models to find features you might prefer.

  • HalfInchShy said...

    Thanks for the compliment, Neil!

    The difficulty I have with estimating the time from start to finish is due to the extra time taken for doing the recording, building 3 camera fixtures, and retakes when someone formatted the wrong card.

    The NC#2 build video had virtually all the footage recorded and I recorded everything I did except coats 2 and 3 of some finishes.

    Based on what I calculated early on, I think it was a 40-hour project with the bulk of that in shaping the legs. I had never shaped legs like that before so to make 5 for a single project all asymmetrical took time.

    So that's my calculation: 40 hours. I'm pretty sure I could do the whole thing again (sans camera!) in 40.