3 ms·

If I ever need a table saw I'm getting one of the pricy ones that stops before it chews up your hand[1]. My cousin is a professional furniture maker and lost t

If I ever need a table saw I'm getting one of the pricy ones that stops before it chews up your hand[1]. My cousin is a professional furniture maker and lost the tips of 3 fingers to a table saw. It happens quickly. [1] https://m.youtube.com/shorts/vCuLs31fDaQ https://m.youtube.com/shorts/vCuLs31fDaQ

ginnungagap 3y ago
Wow that was fast, how does that safety system work?
- foodevl 3y ago
  https://en.wikipedia.org/wiki/SawStop https://en.wikipedia.org/wiki/SawStop "An oscillator generates a 12-volt, 200-kilohertz (kHz) pulsed electrical signal, which is applied to a small plate on one side of the blade. The signal is transferred to the blade by capacitive coupling. A plate on the other side of the blade picks up the signal and sends it to a threshold detector. If a human contacts the blade, the signal will fall below the threshold. After signal loss for 25 micro seconds (µs), the detector will fire. A tooth on a 10-inch circular blade rotating at 4000 RPM will stay in contact with the approximate width of a fingertip for 100 µs. The 200-kHz signal will have up to 10 pulses during that time, and should be able to detect contact with just one tooth.[4] When the brake activates, a spring pushes an aluminum block into the blade. The block is normally held away from the blade by a wire, but during braking an electric current instantly melts the wire, similar to a fuse blowing."
cpwright 3y ago
I have a Sawstop for my main cabinet saw in my shop at home, but also a regular job site saw for working elsewhere. The table saw is a great tool, and the safety feature makes sense. Especially for the cabinet saw where the incremental price for a comparable too is not so much - but there are plenty of other power tools that will hurt you just as badly. A router or jointer won't amputate a finger, it will just turn it to hamburger. No matter the tool, you need to respect it and learn the safety rules.

ginnungagap 3y ago

Wow that was fast, how does that safety system work?

foodevl 3y ago
https://en.wikipedia.org/wiki/SawStop https://en.wikipedia.org/wiki/SawStop "An oscillator generates a 12-volt, 200-kilohertz (kHz) pulsed electrical signal, which is applied to a small plate on one side of the blade. The signal is transferred to the blade by capacitive coupling. A plate on the other side of the blade picks up the signal and sends it to a threshold detector. If a human contacts the blade, the signal will fall below the threshold. After signal loss for 25 micro seconds (µs), the detector will fire. A tooth on a 10-inch circular blade rotating at 4000 RPM will stay in contact with the approximate width of a fingertip for 100 µs. The 200-kHz signal will have up to 10 pulses during that time, and should be able to detect contact with just one tooth.[4] When the brake activates, a spring pushes an aluminum block into the blade. The block is normally held away from the blade by a wire, but during braking an electric current instantly melts the wire, similar to a fuse blowing."

cpwright 3y ago

I have a Sawstop for my main cabinet saw in my shop at home, but also a regular job site saw for working elsewhere. The table saw is a great tool, and the safety feature makes sense. Especially for the cabinet saw where the incremental price for a comparable too is not so much - but there are plenty of other power tools that will hurt you just as badly. A router or jointer won't amputate a finger, it will just turn it to hamburger. No matter the tool, you need to respect it and learn the safety rules.