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Reaxx reaction time

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Forum topic by Plain posted 07-05-2016 06:54 PM 1623 views 0 times favorited 44 replies Add to Favorites Watch
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Plain

157 posts in 163 days


07-05-2016 06:54 PM

Sawstop explicitly published the reaction time for their saw – 5 mksec or something. Bosch made a nice video presentation about their version but I could not find any concrete numbers for the trigger time. I would guess it is slower than Sawstop since the mechanism has to pull large mass of the blade and the arbor under the table surface.
In Sawstop videos we see that the blade is pulled down much later after the rotation stops.
This is critical during kickback situation when the operators hand might be pulled into the blade at much higher speed than during a wiener case they show.


44 replies so far

View Underdog's profile

Underdog

902 posts in 1500 days


#1 posted 07-05-2016 07:00 PM

With the Sawstop, the arbor/blade assembly is pulled down BECAUSE the blade stops in the aluminum puck. The rotational energy is tranferred to the arbor almost instantaneously and slams it down.

Not sure how REAXX is doing it.

-- "woodworker with an asterisk"

View DirtyMike's profile

DirtyMike

458 posts in 366 days


#2 posted 07-05-2016 07:10 PM

i have followed the reaxx since its release, i believe it is a tad slower than the saw stop. Both saw will cut you pretty good when triggered during normal operation. saw stop is not happy about the reaxx and will continue to sue Bosch until they redesign.

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Plain

157 posts in 163 days


#3 posted 07-05-2016 08:08 PM

My guess is since Bosch did not put the number in large letters of the front page of their website and their promotion video it is slower than SS

View Redoak49's profile

Redoak49

1951 posts in 1453 days


#4 posted 07-05-2016 09:27 PM

I disagree with the statement—-

“Both saw will cut you pretty good when triggered during normal operation”

As far as I have read, I have heard of nothing but nicks on the Sawstop. While the REAXX has not been out hardly at all, I would expect similar results.

View htl's profile

htl

2206 posts in 623 days


#5 posted 07-05-2016 11:41 PM

And may I ask what’s wrong with a little nick in what could have been a much worse outcome.

-- There's a hundred ways to do anything, alot depends on the tools at hand.

View diverlloyd's profile

diverlloyd

1442 posts in 1321 days


#6 posted 07-06-2016 01:44 AM

Izzy swan did a video with the reaxx. It was hard to tell where the saw blade hit the hot dog. Check out his YouTube it was pretty informative.

View SuperCubber's profile

SuperCubber

868 posts in 1748 days


#7 posted 07-06-2016 04:03 AM



Izzy swan did a video with the reaxx. It was hard to tell where the saw blade hit the hot dog. Check out his YouTube it was pretty informative.

- diverlloyd

And he ran that sausage into the blade at a pretty good speed. It wasn’t a gentle push like the hotdog video.

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

View MrUnix's profile

MrUnix

4226 posts in 1663 days


#8 posted 07-06-2016 04:12 AM

SS relies on releasing a spring to force a chunk of aluminium into the blade, which then forces the blade down. The Reaxx (and the PTI patent in general) relies on pyrotechnics acting on a piston, which in theory, should be much faster. The dependent portion is how quick the machine can sense an event requiring activation.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Plain

157 posts in 163 days


#9 posted 07-06-2016 04:36 AM



SS relies on releasing a spring to force a chunk of aluminium into the blade, which then forces the blade down. The Reaxx (and the PTI patent in general) relies on pyrotechnics acting on a piston, which in theory, should be much faster. The dependent portion is how quick the machine can sense an event requiring activation.

Cheers,
Brad

- MrUnix


its not that simple. In sawstop the breaking pad has to travel a few mm. It is also very light. Once the pad reaches the blade it stops very fast and then relatively slowly starts descending. The main feature is stopping the blade not descending. In Reaxx the blade together with the arbor has to travel 5”. You have to apply hundreds times more force to achieve the same effect as in Sawstop. All the videos for both Sawstop and Reaxx show relatively simple case when the wiener moves slowly into the blade. Only in one case I saw a more realistic scenario when the guy slammed the frank on the blade. The damages were much more serious. I wander if Reaxx would pass this test at all.

View diverlloyd's profile

diverlloyd

1442 posts in 1321 days


#10 posted 07-07-2016 12:12 AM

Well plain watch izzys video he Rams the sausage through it, and it doesn’t show much damage at all. Not to legion the blade isn’t harmed and the change of the cartridge is done fast.

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Plain

157 posts in 163 days


#11 posted 07-07-2016 03:56 PM

You mean this one
If so REAXX is so much better than Sawstop. It popped up the brake before the hotdog even touched the blade.

View Richard's profile

Richard

1898 posts in 2154 days


#12 posted 07-07-2016 04:20 PM



You mean this one
If so REAXX is so much better than Sawstop. It popped up the brake before the hotdog even touched the blade.

- Plain


Nope that is not Issy’s video , this one is.

https://www.youtube.com/watch?v=3MaaxL8nGzI

View diverlloyd's profile

diverlloyd

1442 posts in 1321 days


#13 posted 07-07-2016 04:39 PM

Plain you must be a sawstop owner or advocate(safety is a good thing). Three times it has been said watch izzy swans video. Have you watched it or is it hard to find if so here is the link https://youtu.be/3MaaxL8nGzI . I don’t know what happened in your video or do I care. Both saws do what the say the cut wood and retract when they are triggered. I’m sure both can be misfired by being to wet. Maybe the guy didn’t wipe of the hotdog and the juice was on the board causing it to fire,at least it fired off. Either way both save fingers and that’s a good thing. This thread is going to turn into a Chevy guy vs a ford guy thing when not do what they say they do. Why don’t you email Bosch or call Bosch and ask them? Let’s us know what the say. Enjoy being on the lumberjocks and let us know about that email or phone call

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Plain

157 posts in 163 days


#14 posted 07-07-2016 04:50 PM

Why in the world should I know what izzys ( all lower case ) is. The question was simple: how fast REAXX saw react. If you know say if don’t: you know what to do.

View Aj2's profile

Aj2

690 posts in 1262 days


#15 posted 07-07-2016 05:04 PM

I have no dog in this fight.My prediction is in 10 years both saw stop and Bosch reaxx will have their saws selling for penny’s on the dollar in Craig’s list.Or rotting in the landfill.
Technology will march forward putting the current system out the back door.
I can see cheaply made saws with self feeders keeping all fingers out of the picture.
Kinda like going from a rotary dial phone to Siri.

Aj

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