Reaching out to see what you are using for your vacuum tables. If you dont use the correct MDF you loose, or dont get good vac. Any recommendations of what you are using and where to purchase. I am in MA
if your vac is less than super strong, you may consider ULDF. some mdf's are not so porous.
as John mentioned, you want to skim off one face, flip it over and glue it down, run the vac to hold it down for an hour or so. then paint the edges to seal them off. then run your spoilboard cut program to skim it off, and level it off.
I also live in MA (South Shore) and I purchase Ultralight MDF from my local lumber yard. They carry both the lightweight and traditional weight MDF. The Ultralight is much more porous and it did not require a surface skim.
WE are running a 25hp sullair pump, MDF has been fly cut top and bottom, and all edges and unused area of the 5'x10' sheet have been sealed with (3) coats of polyurethane. My issue is when I purchase locally the mtl is always different sometimes its dark like a clip board and will not allow vacuum through it. I'm looking for mtl that is lighter in color and about 1/4" thick to use over the spoil board. Have had great luck in the past but now I am struggling to find the same type of MDF. When the material that worked was ordered it was ordered as "MDF" now when I go to re-order I cant get the same material and the vendor doesn't have record of exactly what we received. Its been a couple of years since we received that good stuff. I was hoping someone out there was doing the same process and had a source for their MDF with specific material details.
A forum community dedicated to router and woodworking professionals and enthusiasts. Come join the discussion about different types of routing and routers, shop safety, finishing, woodworking related topics, styles, tools, scales, reviews, accessories, classifieds, and more!