I was using the SawStop to cut some small dados this morning when it suddenly refused to start.  The blinking lights indicated that the brake cartridge was out of position.  After an hour of adjusting and puzzling, I finally deduced the real problem.  I was using a blade that had been recently sharpened and, because of the smaller diameter, I had to adjust the riving knife down so that the dado bottom (top) would clear it.  (adjusting the riving knife height is, by the way, a major pain).  I finally set the riving knife clamp to it’s lowest setting to ensure it would clear.  But at that position, the clamp is so close to the frame of the brake cartridge that the cartridge’s electronics see it as a blade being too close.  After adjusting the clamp up by one tooth, that gave it enough clearance so the cartridge would allow the saw to start again.

What puzzles me, however, is why the saw ran several times before seeing the riving knife clamp.  Maybe sawdust that vibrated out?