[member=20329]Gerald_D[/member] The likelihood of you having damaged the saw is very minimal. That mechanism is exceedingly strong. I realize that it's anecdotal, but I have seen many dozens of activations, with zero damage to the saw itself. About half of the blades don't survive though. They are always set to a sharpening service for inspection.
It sounds crazy, but in the last 10 years or so, we have had 6 of them, in 3 different buildings, used by at least 50 guys. They get used a lot and the most common triggering comes from attempting to cut metal laminate. Everyone knows that you have to do the "keyed override" to do this, and they do it just fine....the first time. It happens when they go back for "one more piece" or "trim the whole board down, after the metal laminate is applied". They forget, bang.......and I get to drop what I'm doing and fix it.
The replacement cartridges are locked up, in a storage room. It's done, so there is a record of the incident and a guy can't just replace it and act like nothing happened.
We have had a few that were "unexplained" too. I set off two of them myself, in the same day, cutting kiln dried 4/4 Poplar. No one knows why, but that was the time I was advised to change the drive belt. Apparently, the belt is part of the ground loop and its effectiveness can break down over time.
Without exaggeration, I would be stunned to find out that I have replaced one of those cartridges less than 100 times. At one point, early on, after 10-12 times I asked one of the phone tech guys if te machine could really take this? Is there a limit to how many times it can happen (before damage to the saw? He told me "We haven't found it"
All of that to say, It's 99.9% sure that it's the blade. Test that blade in a different saw or try another one in your saw.
Quite startling isn't it [scared]