Bill Pentz makes a strong case for the need of a perimeter fence, to constrain the “cloud” of dusty air with in the “suck zone” (my terminology) of the down draft table. So I wanted to incorporate one into my design.
But since I’m using the surface primarily as an out-feed table, the fence needs to be either removable or better yet, needs to fold up out of the way.
So I’ve laid out the design with the end walls hinged to the longer back wall, and the back wall hinged to the back side of the table, such that it all folds up and swings down out of the way.
I modeled it with an accurate strap hinge model, so I know it will work. But the hinge model was longer than I needed and crashed when I tried to trim the hinges to length to illustrate it perfectly.
Here’s the model shown without the hinges.
-- Pine is fine, but Oak's no joke!