This is a stop system for creating repeated cuts of different lengths using a track saw parallel guide system based on Incra T track plus. I have the Precision Dogs set, but Seneca also makes a version and you could conceivably design your own. Basically you just need a way to attach the T track at a 90 degree angle to your track.
The problem this solves is repeating multiple cuts of different lengths at different times. If you have a system without flip stops (which I believe neither Seneca nor Precision Dogs include), making a different length cut will always require moving the stop on the rail. You can't leave multiple stops in place because only the innermost one will index against the material edge. Going to a longer cut and then back to a shorter one becomes impossible.
To solve this problem, I broke the stops into two parts. One half attaches to the top of the rail (using 1/4-20 socket head hex bolts, same as Incra uses for their miter gauges). This half doesn't extend below the rail, which means that it won't interfere with your material. You can set as many of these up as you want, effectively creating a story stick for your project.
When you're ready to make your cuts, you attach one of the bottom stops to the bottom of the rail. Its surface extends far enough upwards to index against the top stop, and low enough to index against the material to cut. There are two versions of this stop: a simple one that indexes directly against the material, and one with a hole for a dowel that you can epoxy into place to create a spacer for cuts narrower than the width of the track.
You'll want to print two each of the bottom stops with and without dowel, and as many of the top stops as you care to use to mark your positions.
To finish/calibrate the stops, do the following:
Your parallel guides are now fully calibrated. You can make narrow cuts by using the dowel stops and setting the desired width directly on the scale. For wider cuts, use the regular bottom stops and add the length of your spacer (e.g. 250mm or 10") to the value displayed on the scale.
The author marked this model as their own original creation.