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Why Is My Table Saw Zapping Me?

 
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Old 05-20-2020, 05:34 PM   #1
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Why Is My Table Saw Zapping Me?


We have been using the Dewalt 60v table saw for about a year, and really love it. The one issue we have is when ripping pvc trim, which we do a lot. During every cut, a static charge will build up and zap you when you touch the metal table. More of an annoyance, as we know it's coming, but just wondering why?

My electrical knowledge is very limited, so I don't know if there is a remedy for this or not. Never noticed it on any other battery tool other than this one.
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Old 05-20-2020, 05:44 PM   #2
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Re: Why Is My Table Saw Zapping Me?


Sounds like you need a ground strap to discharge the static build ?

I never had it happen on my porter cable table saw.

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Old 05-20-2020, 06:08 PM   #3
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Re: Why Is My Table Saw Zapping Me?


Friction + PVC = static charge. Pretty well known effect, but I'm not sure why we don't notice it more often with our work/tools. Maybe because most cuts aren't long enough to build up a significant charge.

The obvious solution, if it really bugs you, is to maintain electrical contact with the machine while using it, so you both have the same amount of charge. Of course, that won't stop getting a zap if you subsequently touch something else that doesn't have that charge.

Back when I serviced fax machines, we found that some of them tended to have paper-handling problems due to static buildup. The solution? Periodically spray the machine down with Static Guard.

No idea why it would happen with the DeWalt and not other machines.
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Old 05-20-2020, 06:18 PM   #4
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Re: Why Is My Table Saw Zapping Me?


Quote:
Originally Posted by Tinstaafl View Post
Friction + PVC = static charge. Pretty well known effect, but I'm not sure why we don't notice it more often with our work/tools. Maybe because most cuts aren't long enough to build up a significant charge.

The obvious solution, if it really bugs you, is to maintain electrical contact with the machine while using it, so you both have the same amount of charge. Of course, that won't stop getting a zap if you subsequently touch something else that doesn't have that charge.

Back when I serviced fax machines, we found that some of them tended to have paper-handling problems due to static buildup. The solution? Periodically spray the machine down with Static Guard.

No idea why it would happen with the DeWalt and not other machines.
Never had it happen on any corded table saw. I know that pvc does produce a lot of static, but this will zap you after even a short rip. Will only do it with pvc and not wood.
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Old 05-20-2020, 06:23 PM   #5
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Re: Why Is My Table Saw Zapping Me?


Where's Leo when you need him?
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Old 05-20-2020, 07:37 PM   #6
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Re: Why Is My Table Saw Zapping Me?


Tin nailed it. Static discharge with no place to go. It doesn't happen with your plug in saw because it's grounded.

Does it have a metal or plastic tablesaw top? If it's plastic there probably isn't much you can do. If it's metal you can attach a flexible wire to it and attach it to a big nail and push it into the ground, essentially grounding your tabletop.
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Old 05-20-2020, 08:45 PM   #7
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Re: Why Is My Table Saw Zapping Me?


I thought you were going to come up with something fancy like...the density and molecular coefficient of pvc when pushed across an iron surface at a certain rate of speed gives an imbalance of electrons between the two surfaces...therefore causing a static charge.

Oh well.....
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Old 05-20-2020, 08:49 PM   #8
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Re: Why Is My Table Saw Zapping Me?


Pretty sure he doesn't give a crap why it happens, he wants to know how to stop it. Sorry to disappoint.
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Old 05-20-2020, 09:13 PM   #9
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Re: Why Is My Table Saw Zapping Me?


Ground it.
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Old 05-20-2020, 09:44 PM   #10
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Re: Why Is My Table Saw Zapping Me?


A battery operated saw that you have to plug in.........hmmmm. whats wrong with this picture?
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Old 05-20-2020, 10:09 PM   #11
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Re: Why Is My Table Saw Zapping Me?


Slightly related; any time I rip pvc fascia boards I spray myself and my FACE with static guard first. Absolutely no worse pain I know of than the little cuttings getting behind contact lenses.

Imagine you’re on a 4/12 roof installing a facia board where a gable meets the main roof. (Almost laying on your side.) Just as you get to where the pointy triangle meets the roof, that was a pain in the butt to rip in the first place the sweat drips off your forehead into your eye and brings a whole bunch of murder hornet plastic shavings.

I love PVC and I hate it.
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Old 05-21-2020, 04:28 AM   #12
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Re: Why Is My Table Saw Zapping Me?


Quote:
Originally Posted by Leo G View Post
Tin nailed it. Static discharge with no place to go. It doesn't happen with your plug in saw because it's grounded.

Does it have a metal or plastic tablesaw top? If it's plastic there probably isn't much you can do. If it's metal you can attach a flexible wire to it and attach it to a big nail and push it into the ground, essentially grounding your tabletop.
It has a metal top. I thought of grounding it, but with it being DC, I didn't know if that would do it.
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Old 05-21-2020, 06:18 AM   #13
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Re: Why Is My Table Saw Zapping Me?


I will spray some static guard onto the table top and fence, as well.

I generally keep my left hand down as a material guide, so that reduces the shock

-Rich
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Old 05-21-2020, 06:37 AM   #14
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Re: Why Is My Table Saw Zapping Me?


Static charge has to go somewhere. Drain it off through a wire into the ground or it'll drain itself through you into the ground, ouch.
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Old 05-21-2020, 04:40 PM   #15
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Re: Why Is My Table Saw Zapping Me?


Grounded the saw table to the metal stand and it worked like a charm.
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Old 05-21-2020, 07:27 PM   #16
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Re: Why Is My Table Saw Zapping Me?


Your welcome.
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Old 05-29-2020, 10:51 PM   #17
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Re: Why Is My Table Saw Zapping Me?


Quote:
Originally Posted by WBailey1041 View Post
Slightly related; any time I rip pvc fascia boards I spray myself and my FACE with static guard first. Absolutely no worse pain I know of than the little cuttings getting behind contact lenses.

Imagine you’re on a 4/12 roof installing a facia board where a gable meets the main roof. (Almost laying on your side.) Just as you get to where the pointy triangle meets the roof, that was a pain in the butt to rip in the first place the sweat drips off your forehead into your eye and brings a whole bunch of murder hornet plastic shavings.

I love PVC and I hate it.
Yeah those 4/12s are a real bitch. I hope you were harnessed off somewhere. Next time try installing the fascia from a ladder like it's supposed to be done. Much easier not working horizontal and upside down
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Old 05-30-2020, 06:13 AM   #18
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Re: Why Is My Table Saw Zapping Me?


My cordless makita blower zaps me, I thought it had something to do with snow but I get zapped blowing drywall dust too.
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Old 05-30-2020, 09:18 PM   #19
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Re: Why Is My Table Saw Zapping Me?


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My cordless makita blower zaps me, I thought it had something to do with snow but I get zapped blowing drywall dust too.


My flexvolt blower zaps me occasionally. I’ve only noticed it while blowing leaves on my gravel driveway.




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Old 05-30-2020, 09:24 PM   #20
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Re: Why Is My Table Saw Zapping Me?


Never got zapped from my EGO blower... so far.

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Sanding is the bane of my existence
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