|Forum topic by mark76wa||posted 218 days ago||574 views||0 times favorited||7 replies|
218 days ago
I am trying to make an extension table and work surface for my table saw. The plan was to laminate three layers of MDF, add oak sides and a replaceable hard board top. The table was to have two holes for clamping, a down draft box for sanding (shown) and two t-tracks running the length (not cut yet).
I made all the cuts to the first layer of MDF than laminated the second layer on. I used a pattern bit in my router to cut the holes. Than I worked on the hard board top. Lastly I added the third layer of MDF.
When the glue dried I notices the whole thing was tweaked. What will be the front of the table is nice and flat with the sides square to the top. But the back of the table twists up at the corner by 1/8th an inch! I trued to fix it when I added the oak sides but now I just have out-of-square sides.
I have no idea what happened. I did the third layer the same as the second. I was using my table saw top because it’s the only thing that I have that is really flat. I used screws to hold everything together as the glue dried and the glue was even from the same bottle. The only thing that was different was that the third layer of MDF was from a different sheet. I didn’t think that would make a difference because of MDF’s stability.
I cut kirf’s along the bottom thinking that would releave some stress but that didn’t work at all.
Any ideas on how I can save my table top and/or what happened?