I haven’t build the vacuum hold down yet (need to increase my table size first), but the one that caught my eye was 3 layers of DTFB and is documented in the This project really sucks. (Super cheap vac table) topic here on the V1 Engineering forums. The bottom has channels running the long direction of the foam, the middle had channels running the short length (90 degrees to the bottom), and the top layer had (I believe they were 1/4”) holes that lined up with the intersections. There is a 3-d printed manifold that tucks into one end to connect to a shop vac.
1 Like