SawStop PCS- 1st Safety Activation Issue

gsdvorak

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May 28, 2013
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Well, yesterday I had my 1st safety activation of my SawStop- Thank Goodness it wasn't a finger but was a stupid move on my part of not checking the wood for metal.  I got the new cartridge in just fine, but now have an extra vibration with the saw and the humming sound to go with it.  Has anyone else experienced this?  I know that the blade arbor assembly needs to be fully lowered to re-set (which I did) but not sure if something else needs to be done (hopefully something simple)- saw runs fine otherwise.

Thanks,
Gerald
 
Did you reuse your same blade? If so that may be the cause, if not then the new blade may just have different harmonics that you are hearing. Either way, I would remove the insert and try the saw to see if the insert is interfering with the blade in any way. Glad that you are unhurt!
 
I have triggered my SawStop twice. Both times misjudging where a metal jig was going to touch the blade. Scary event! I have never been able or wanted to reuse the saw blade. I've always installed an intact blade.

I would suggest you put a new blade on the saw and see if the noise persists.

If it does, call SawStop. They are great on the phone. Knowledgeable and helpful.
 
I did install a different blade- it is however a thin kerf but still shouldn’t be causing the vibration I am experiencing.  I’ll try reaching out to Sawstop.  Thanks for your responses!
 
Yes, the SawStop rep should able to resolve the issues you're having.

SawStop doesn't recommend the use of thin-kerf blades or blades with the anti-kickback feature:

The SawStop safety system is designed for use with standard 10” blades with kerfs from 3/32” to 3/16”. Blades with kerfs much thinner than 3/32” should not be used because those blades might not be strong enough to withstand the force applied by the brake when it activates. As a result, those blades might deform and stop more slowly in the event of an accident, resulting in a more serious injury. Blades with kerfs much thicker than 3/16” are heavier than standard 1/8” kerf blades. Therefore, those blades should not be used because they may stop more slowly than standard blades in the event of an accident, resulting in a more serious injury. Similarly, stacks of 2 or more 10” blades should never be used on your SawStop saw as the combined weight of the blades may be too heavy to stop quickly. If you need to use a blade with a kerf thicker than 3/16”, use an 8” dado set with the optional SawStop 8” dado cartridge. The dado cartridge is designed for use with 8” dado sets up to 13/16” wide.
 
[member=20329]Gerald_D[/member] The likelihood of you having damaged the saw is very minimal. That mechanism is exceedingly strong. I realize that it's anecdotal, but I have seen many dozens of activations, with zero damage to the saw itself. About half of the blades don't survive though. They are always set to a sharpening service for inspection.
It sounds crazy, but in the last 10 years or so, we have had 6 of them, in 3 different buildings, used by at least 50 guys. They get used a lot and the most common triggering comes from attempting to cut metal laminate. Everyone knows that you have to do the "keyed override" to do this, and they do it just fine....the first time. It happens when they go back for "one more piece" or "trim the whole board down, after the metal laminate is applied". They forget, bang.......and I get to drop what I'm doing and fix it.
The replacement cartridges are locked up, in a storage room. It's done, so there is a record of the incident and a guy can't just replace it and act like nothing happened.
We have had a few that were "unexplained" too. I set off two of them myself, in the same day, cutting kiln dried 4/4 Poplar. No one knows why, but that was the time I was advised to change the drive belt. Apparently, the belt is part of the ground loop and its effectiveness can break down over time.
Without exaggeration, I would be stunned to find out that I have replaced one of those cartridges less than 100 times. At one point, early on, after 10-12 times I asked one of the phone tech guys if te machine could really take this? Is there a limit to how many times it can happen (before damage to the saw? He told me "We haven't found it"
All of that to say, It's 99.9% sure that it's the blade. Test that blade in a different saw or try another one in your saw.

Quite startling isn't it  [scared]
 
Perhaps try running the saw without a blade to confirm that the drive mechanism runs smoothly?
 
kevinculle said:
Perhaps try running the saw without a blade to confirm that the drive mechanism runs smoothly?

You can't do that, just like you can't run it without the cartridge.
The electronics of the machine can sense this. There is an adjustment mechanism, that moves the cartridge closer/further from the cartridge, it needs to be within a certain range, or the saw won't start.
The machine defaults to "OFF" and will not run until all parameters are met.

This is also why you need a special cartridge for a dado blade. The distance is significantly different.
 
Thanks for the suggestions.  I already had tried a different blade and same result- I used to put my hand on the cast iron top and there would be zero vibration felt but now it's significant.  I didn't get a chance to call Sawstop yesterday so will try to reach out to them next week.  I'll report back in case someone else experiences the same issue.

Regards,
Gerald
 
Greetings Gerald, I have had one activation and upon installation of a new brake and blade, I experienced a difference in the way the machine sounded. Can't remember if there was a vibration. I did reach out to SawStop. They did not think it was a big deal. I have since been running it for over a year with no incidence to its functionality or its accuracy.I just got used to the new way it sounded. Granted, it was not a huge difference, but a man's tools are often like his lady - he knows how they sound and behave. (All due respect to the ladies out there.) Hope this helps.
 
I’d be concerned. Anything that can cause significant vibration in a PCS should not be there. I’d reach out to SawStop before using the saw.
 
Update:  I called SawStop customer service and the gentleman in their tech support gave me a few suggestions to try (double-checking the arbor assembly is locked, check the belts, blade, etc)- everything looked good and normal.  I decided today that I'd go to my local dealer and get a new blade similar to what was in the saw and if that didn't work, I'd call them back.  The blade I purchased was a blade from FS Tool 80-tooth.  Blade installed and Yay!  No more vibration and whisper-quiet again!

Thanks to all for your suggestions- also really impressed with SawStop's customer service.  It was nice to talk with someone knowledgeable about their product who is able to help with the issue without passing me on to someone else.  This turned out to be an expensive mistake ($250 for the blade and cartridge)- hopefully that's my 'stupid tax' for the year.

Regards,
Gerald
 
[member=15289]Birdhunter[/member] , honestly not sure- it is an older Delta rip blade that has been sharpened a number of times, but still appears to be in good condition.  Guessing it's not very balanced but one thing's for sure:  it's never going back on my PCS.
 
Before I bought the SawStop, I used a Delta Unisaw. I didn’t like the Delta blade. Switched to Forrest blades. Never looked back. So happy your saw is all well now.
 
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