Platters are hard, huh? You need to proceed slowly. Take some material from the center first and work your way to the rim. Work in sections, getting close to the final thickness you want in the center section, then a little further, then a little further still. Be patient, work slow. Slow your lathe down. As the piece gets thin, it can warp or flex, even if your wood is dry. I like to finish mine with a heavy scraper taking very light cuts.
I'll post some pics of a shallow bowl I did last weekend. Not quite a platter, but close.
That bowl was perfect right up until that last cut...
Last edited by sawdustfactory; 09-11-2011 at 12:14 PM.
Reason: New post with pics