My SawStop table saw actually has specs for flatness. The spec says flat to 10/1000 inch for the main table, and 20/1000 inch for the wings. I learned it when I called SawStop to ask about flatness. The saw I bought was a refurbished one.
During assembly, I used a straightedge to align the wings to the table as flat as possible, and noticed a little rocking of the straightedge on the main table. It seemed excessive until I measured it with feeler gauges. I learned that 10/1000 inch is more of a gap than I thought it would be, and the saw was within spec. I did not ask for a replacement. The saw has worked out very well for me, no problems at all.
I wonder whether DeWalt has specs for their table saw flatness?
Remove the blade insert and retest. Measure the gaps with feeler gauges, so you can tell them how non-flat your table is. After that, get it replaced under warranty. You paid for a quality table saw and I am sure you plan to keep it and use it for a long time. The time you spend now to get it right is very small compared with the years of happy use to come.
Last edited by Tool Agnostic; 06-03-2020 at 07:50 PM.