Here’s a short video that shows how to use the Crucible Chairpanzee to work with photographs of furniture to create simple drilling settings for the compound-angle mortises.
In the video, I show how to convert a chair’s “rake” and “splay” into “sightline” and “resultant” angles using the Chairpanzee. Why would you want to do this? It makes the drilling much easier.
If you have only the rake and splay, then you usually use two sliding bevel tools to drill the mortise – one for rake and the other for splay – and have to obey both tools as you drill. It’s do-able, of course, as I worked that way for years.
By using trigonometry (or the Chairpanzee) to convert things to sightline and resultant angles, you have to obey only one sliding bevel tool. It makes drilling compound angles as easy as possible.
Here’s the video:
There are other ways to use the Chairpanzee. You can use it to design new chairs, stools and tables from scratch. I’ll make a video showing that process sometime in the near future.
The Chairpanzee is available in our store for $16 plus $4 domestic shipping anywhere in the United States.
— Christopher Schwarz