This is a 3D printed version of a polygauge that I first saw in a youtube video: https://youtu.be/rZUKzSlExIc
Recently, Woodpeckers came out with a stainless steel version retailing for $90. For a setup tool that is more that I want to pay (regardless of how precise it is). https://youtu.be/_ylB5z8vWqw
This gauge accommodates 5 different shapes (square, pentagon, hexagon, octagon, or dodecagon (12)) and can be used to set up a table saw (two different ways) or a miter saw (also two different ways) to cut accurate and repeatable mitered corners.
I haven't used the knob as much as I thought I would, the thicker gauge makes it easy enough to reposition with your hand, but I figured I'd include it YMMV.
Updated 7.10.19 corrected shape to hexagon next to the 60°. Uploaded version without the handle recess.
Knob_v2.STL | 3.2MB | |
PolyGauge.STL | 5.0MB | |
PolyGauge_nohandle.STL | 5.0MB |