|Project by smitty22||posted 11-27-2010 08:02 AM||6693 views||18 times favorited||12 comments|
One of my woodworking goals was to learn more advanced joinery and the box or finger joint looked like a fairly simple one to tackle. (Boy was that a bad guess.) Had seen several commercial box joint jigs and a couple of shop made versions here on LJS, so after some study of these, decided to modify my PM2000 miter gauge to convert it to a box joint jig. This project is the result…
The miter gauge provided with the Pomatic PM2000 is a good one, having a positionable extruded fence fastened to the miter face with T’bolts. The fence can be slid horizontally to adjust the box joint notch width, but I wanted a more precise method of adjusting the jig position than the ‘bump and pray’ method. This solution was to add a 10-32 threaded rod adjustment and seems to work pretty weill. The left white block is threaded, and when the fence T-bolts are loosened, the screw is used to move the fence either left or right with respect to the miter gauge body. Turning 1/6 turn – one flat on the hex acorn nut – produces a pretty consistent .005” change. I’m sure there are better ways to do this, but was a fairly simple mod and pretty cheap, relying mosting on stuff out of the junk box.
A few features of this mod are: a. The added box joint hardware can be installed on either side of the miter guage, allowing either left or right miter slot application. b. The added hardware can be quickly removed returning the MG to it’s original configuration. c. The added hardware can be reinstalled without disturbing the basic box joint settings. d. Did I mention Cheap?
Picture 1 – The completed modified miter gauge (MG).
Picture 2 – The Stock PM2000 miter gauge.
Picture 3 – The components added to the MG. White material is Corian, it works very nicely for jigs.
Picture 4 – Face of the box joint jig and first attempt at a box (screwed up, but later fixed).
Picture 5 – Completed test box, most happy with the results! Needs a lid.
Picutre 6 – Took all this stuff! to make a silly little box!
Anyway, hoping this mod might be of some use to others, and was a fun project.