How fast does the KEB kickback stop work?

[tdatta]

For the KEB saw I am unable to find a specification on how long it takes for the electronic brake to engage and stop the blade after kickback/coming off the rail is detected.

Does anyone have personal experience with this? Is it a fraction of a second or multiple seconds? I have seen different comments online.

 

[ElectricFeet]

For the KEB saw I am unable to find a specification on how long it takes for the electronic brake to engage and stop the blade after kickback/coming off the rail is detected.

Does anyone have personal experience with this? Is it a fraction of a second or multiple seconds? I have seen different comments online.

Can't find the specs, and I've never done it myself, but it's shown on camera here:
=shared&t=110

So "a blink of an eye" seems to be the measure of it.

Also here, in German (you can switch on automatic translation in the YouTube settings):
=shared&t=320

 

[me_two]

The stop is instant. I was using the saw on a short rail not clamped down and it moved. I twisted the saw and it hit the track. That’s how I know how fast it cut out.

 

[Crazyraceguy]

The TS60 is also equipped with that technology. I have never had it "go off", but I can imagine it being a bit startling.
I seem to recall [member=75780]woodbutcherbower[/member] having some comments about this too, but I don't remember well enough to try to quote it.

 

[Lincoln]

For the KEB saw I am unable to find a specification on how long it takes for the electronic brake to engage and stop the blade after kickback/coming off the rail is detected.

Does anyone have personal experience with this? Is it a fraction of a second or multiple seconds? I have seen different comments online.

Definitely fraction of a second. Multiple seconds would make it useless, even 'normal' saw brakes are much quicker than that. They show it on the official Festool youtube videos, for the saw.

 

[woodbutcherbower]

+1 on the above. Absolutely instant. It’s literally the first thing I tested when I got the TS60.

 

[PaulMarcel]

That was definitely instant. Saw didn't even jump back a tiny bit. I like that you can turn off the kickback feature and the light signals when it is detecting the surface and re-engages automatically.

I also want that Festool bevel gauge on the pegboard  [tongue] I seem to collect those things

 

[Cheese]

Also here, in German (you can switch on automatic translation in the YouTube settings):
=shared&t=320

From this video and I quote: "So the saw is stopped in milliseconds and thus I am safe when working."

[attachimg=1]

 

[woodferret]

That sounds like enough to still nick the rail, but not enough for the Makita smile.

 

[tdatta]

+1 on the above. Absolutely instant. It’s literally the first thing I tested when I got the TS60.

How did you test it? Ive watched the videos which say to press the button 4 times and that does indeed stop the blade. However if I instead try to lift the saw off of the track it doesnt stop the blade but simply blinks orange. Ive also cleaned the sensor and followed the procedure for checking the kickback stop function operation. That all checked out, meaning the pressing the button 4 times causes the blade to stop and flash red/green and then lifting and dropping the saw backdown causes a reset and return to green light.

Do you have to actually plunge and induce a kickback? I am not doing that, I am just lifting it off of the track while its running.

 

[PaulMarcel]

That sounds like enough to still nick the rail, but not enough for the Makita smile.

[big grin] ha! I like that...

 

[woodbutcherbower]

How did you test it?

I set the saw up on the rail. The material was an offcut of 40mm oak-block countertop. Instead of plunging gently, I rammed it down - and deliberately tried to induce a kickback. My attempt failed spectacularly, with the blade brake kicking in within microseconds. I'm not even sure that the saw actually left the rail. It was at that point I knew that the technology worked.

 

[tdatta]

How did you test it?

I set the saw up on the rail. The material was an offcut of 40mm oak-block countertop. Instead of plunging gently, I rammed it down - and deliberately tried to induce a kickback. My attempt failed spectacularly, with the blade brake kicking in within microseconds. I'm not even sure that the saw actually left the rail. It was at that point I knew that the technology worked.

Thanks, seems like just lifting it off of the rail won’t engage the brake. I guess there must be a load on the blade.

 

[squall_line]

Thanks, seems like just lifting it off of the rail won’t engage the brake. I guess there must be a load on the blade.

Technically it's not kickback if there's no load on the blade, and it's an anti-kickback measure, not a general blade brake.