Reply by SCOTSMAN

You can actually use three phase technology to stop the blade instantly and I mean instantly! Using the phases to oppose each. other so one phase is pushing to go forward the other is trying to go backward and you get a stalling humming effect when neither goes anywhere.This can be used as an effective braking system to save fingers etc
,I see after I wrote this the last time someone (company) was working on it then nothing.
The saw stop is a poorly thought out unecessary technique which actually damages the mechanism and is expensive to replace. The method I talk about is well known and would be just as effective without the hassle and expense. Alistair

-- excuse my typing as I have a form of parkinsons disease