Saw Stop question....

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Forum topic by Mainiac Matt posted 03-07-2012 07:12 PM 2582 views 1 time favorited 13 replies Add to Favorites Watch
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Mainiac Matt

8047 posts in 2329 days

03-07-2012 07:12 PM

I’m not trying to fan the flames here… but rather have a very specific question for an actual Saw Stop TS owner/user.

Have you ever had the emergency stop mechanism activated by something other than you flesh?

i.e. a nail in a board, a sap pocket, water or ice on a board, etc…

-- It’s the knowledge in your head, skill in your hands and motivation to create in you heart that makes you a woodworker. - Mainiac Matt

13 replies so far

View NBeener's profile


4816 posts in 3174 days

#1 posted 03-07-2012 07:15 PM

I know, from paying attention, that it can happen, and that—traditionally—SS has been very generous about free replacements, primarily to figure out what happened, and whether they need to tweak their design.

You can probably find specific info by googling “sawstop misfire” or “false trigger” or “false positive.”

It seems VERY rare, as a percentage of users and hours or use, from what I’ve seen.

-- -- Neil

View agallant's profile


551 posts in 2887 days

#2 posted 03-07-2012 07:17 PM

I had my SS for about a year and never had it go off. With that said after a year of owning it I found that I was turning off the break all of the time because wet wood, nail, staple etc WILL set it off and destroy the break and blade. After I realised that the safty was not of much use due to me turning it off all of the time I sold the saw and bought a unisaw.

P.S. I give it about 5 more replys before this gets turned in to a b*tch-fest about sawstop.

View live4ever's profile


983 posts in 3010 days

#3 posted 03-07-2012 07:22 PM

Interestingly, Incra miter gauges will activate the brake. Who knew.

-- Optimists are usually disappointed. Pessimists are either right or pleasantly surprised. I tend to be a disappointed pessimist.

View IrreverentJack's profile


727 posts in 2843 days

#4 posted 03-07-2012 08:36 PM

Live4ever- Do you know why, aside from metal touching the blade? I did see this post , but the OP later said it was his fault. He didn’t set the miter guage to clear his dado set. -Jack

View Elizabeth's profile


817 posts in 3144 days

#5 posted 03-07-2012 08:39 PM

I believe that if you touch something to the blade when the saw is NOT running (when the saw has power to it but the blade is not moving), if the system detects a level of conductivity high enough to trip the blade then the diagnostic lights will blink. I haven’t done this myself but it was demonstrated in a class I took – touching your finger to the side of the stationary blade will cause the saw’s safety system to alert you to conductivity. I would guess that if you have overall wet wood this would have the same effect, but it wouldn’t help if the outside was dry and the inside was wet.

I’ve got a metal detector that I use on all of my reclaimed wood before running it through any blade, and the only green wood that I saw is on my bandsaw.

View Bill White's profile

Bill White

4932 posts in 3960 days

#6 posted 03-07-2012 09:05 PM

Here we go again…...


View moke's profile


1175 posts in 2776 days

#7 posted 03-07-2012 09:12 PM

A friend has one and he set it off once, via not adjusting the “blade gap”. Actually it was a sanding disc, which evidentially is slightly larger than a 10” blade. I was not there, I have heard when it does fire it moves the machine, but he said it was loud but didn’t rock the machine much.

I have been giving him grief for years about being to cheap to buy a table top disc sander—-this really played into my hand!!!

Three of us bought an SS the same day—he is the only one so far.

-- Mike

View stevenmadden's profile


174 posts in 3089 days

#8 posted 03-07-2012 09:33 PM

ssnvet: No.

View Grandpa's profile


3259 posts in 2676 days

#9 posted 03-07-2012 09:42 PM

I visited with a man that formerly worked for a mobile home manufacturing plant. He said they changed from traditional table saws to Sawstops. When they attempted to cut a siding material that comes in 4×8 sheets they triggered the blade stop. the siding had a foil covering on one side. they had always cut it on the old saws with no adjustment or changes so they didn’t think anything about cutting it on the new saw. BANG! I would stay from anything that could conduct electricity. That would include some cured finishes, pressure treated woods that have moisture in them, green lumber etc.

View rcs47's profile


190 posts in 3129 days

#10 posted 03-08-2012 02:15 AM

While waiting for the SS demo at a woodworking show, I was talking to a guy that had a SS in his shop. He was telling me about his employee that caused the brake to fire by hitting the off switch, pulling out his tape to check the cut length, and the tape hit the spinning blade. It’s good that the safety is live until the blade stops, but I was not thinking about it until he told me his story. I keep that story in mind when ever I check a cut.

One thing at the SS demo that got me was after going through how the saw does the prestart, and showing how it runs, they touch the blade with the hot dog and ask someone to turn it on. It won’t start! Not that I go around touching blades and trying to start saws, but the tech is good.

-- Doug - As my Dad taught me, you're not a cabinet maker until you can hide your mistakes.

View a1Jim's profile


117095 posts in 3577 days

#11 posted 03-08-2012 02:28 AM

There’s a Saw Stop where I teach ,a student tried cutting a wet 4×4 and triggered the brake. It was partially my fault because I hadn’t read the manual about how you can turn off the brake when cutting wet wood.

-- wood crafting & woodworking classes

View Kenny 's profile


260 posts in 2448 days

#12 posted 03-08-2012 03:15 AM

As for the SawStop saws “jumping” or “rocking” when the brake is fired, um, no. Especially not with their cabinet saws, just not gonna happen.
The ONLY saw they make that I think would even have the remote possibility, is their contractor saw with the roll-around base.

I have seen three (3) SawStop deoms now, all live and in person, video taped them all on my Canon 12mp digital camera with a tripod, and 2 of the demos were done using the contractor saw with the standard 4 legged base. Not once did the saw move or jump at all.

I just watched the videos, and neither type of saw moves. I even watched it frame by frame on a 42” HD TV, nothing. The last 2 videos I had the entire saw in frame too.

Personally, that would be the last thing on my mind if I had the money to afford one. I would much rather have the protection, even if only 75% of the time (due to cutting wet wood, etc).

Anyway, if I’m cutting wet wood or anything that may have other crap in it, I’m doing so on the bandsaw with a cheap blade. Safer, and cost less to replace a $15 bandsaw blade than my $50-$100 TS blade.

-- Kenny

View Mainiac Matt 's profile

Mainiac Matt

8047 posts in 2329 days

#13 posted 03-09-2012 05:02 PM

Wet wood triggering the SS is one of the reasons my boss decided not to put a SS in our crating shop.

If the nanny state ever mandates it, we’ll likely remove the last of our PM 66s in that department.

We only use the TS for a quick rip, or bevel cut anyways.

Life with a Selco is good! Life with two Selcos is better.

-- It’s the knowledge in your head, skill in your hands and motivation to create in you heart that makes you a woodworker. - Mainiac Matt

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