I just recently purchased a ts55 rail saw and have been using it for about three days now. On the forth day however the saw started to feel "tight" on the rail and required more force to move it than before, and due to this i am burning the edges of my plywood. I have checked both the blade speed (it gets "sticky" on all speeds) and made sure that the rail is clear from saw dust. I am cutting 12mm plywood. I am cutting rather small pieces of wood that require me to "bridge" the rail with other pieces of wood to keep the rail flat and level. Does anyone have any suggestions?
Welcome to the Festool Owners Group! Sorry to hear about your problem, but like Roseland suggested, it does sound as though the guiderail adjusters on the saw have moved.
I'd try this:
Place the guiderail on a flat surface like the floor (you're not going to be cutting anything for the moment)
Disconnect the saw from the electricity supply and clean the grooves on the bottom of the saw with a brush to remove dirt and sawdust
Likewise, clean the rail
Place the saw on the rail, and without plunging the saw, simply try to slide it along the rail.
It should glide along the rail with very little resistance, but on the other hand it should not be so loose that it moves from side to side.
If the saw is difficult to move along the rail, or it "jiggles" from side to side, adjust the green thumbscrews on the baseplate so that there is no side-to-side play, but the saw moves freely along the rail.
Once it moves nicely along the rail, try cutting your plywood and report back!
See page of 8 Rick Christopherson's excellent Supplemental Manual
for the TS55 for a more detailed account of how to adjust the thumbwheels - and for loads of useful information on the saw.