I purchased a Delta Unisaw back in 2006 and only now am assembling it (don't ask ). No warranty coverage at this late date, and have run into a few problems.
For the record, the Delta 'Customer Service' rep with whom I spoke seemed glad to be
in a position to deny me assistance. Any Delta tools I buy in the future will be
painted GREEN and bear the name 'Grizzly'.
CURRENT PROBLEM: The saw package includes a Biesemeyer U50 extension table that is 44" long. It is BOWED along its length, exhibiting a 1/4" dome.
The front (only) rail of the Delta UNIFENCE is extruded aluminum. It has two channels (like T-slots) that accept bolts set in the front edge of the saw's cast-iron top and Biesemeyer extension table. Of course, the fence rail is straight and it's bolt channels are straight - and the rail must maintain a uniform relationship to the table surface. But the bowed/domed extension table makes this impossible.
The diagram below shows the extension table's construction: 3/4" sheet material with a hard gray laminate covering top and edges, and a purple laminate covering the underside. The underframe is bare wood strips 3/4 x 1-3/4", arranged as diagramed. They appear to be glued to the underside of the tabletop.
I removed the extension table from the saw, set it on support blocks at all four corners and placed considerable weight on it near its center, hoping to flatten the top.
PLEASE TELL ME IF THERE'S A BETTER WAY TO TAKE THE BOW OUT OF THIS TOP. ARGH!