Hi PH,
try this...as you are to cut a piece of board, go all the way to the END of the cut and plunge theTS55 just enough to touch the surface of the Melamine...than go BACKWARDS!!!(very slowly and with caution) this will create a"scribe cut" ....next go to the beginning of your cut and plunge fully and about 10mm more than your board thickness.......Now cut the board as usual. This should produce a clean cut. If it does not than try to plunge the saw on the rail WITHOUT moving it and measure the resulting cut how far it is from the Splinterguard....AT THE RFONT AND AT THE BACK of the blade...ie the entry of the blade and the exit. I have had this problem with some customers of mine complaining about the quality of cut and when they have sent the saw for inspection to the Festool Repair Ctr. the saw came back with a label that all is OK but the problem of splintering persisted.
The REMEDY....as the blade is not PARALLEL to the rail it enters the workpiece with no problems but as it hits the workpiece with the backside it tends to catch and tear out some of the part that was cut perfectly with the front of the blade.
You have to use VERNIER Callipers and a brand new Splinterguard freshly cut ONCE with a rather tightly fitted saw/to rail (two green thumbscrews on side of the saw have to be tight, but the saw has to move without a lot of effort o your part)
If your measurement is not exact at the front of the blade and at the back than it is time to unlock the 4 screws on the base and adjust the saw base untill it cuts perfectly parallel to the rail. IF YOU FEEL ALL IS OK than use Locktite on the screws to eliminate any future loosening of the joint.
Good Luck....you will need a lot of patience and a good eye.
The Trainer