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Magnetic switch.

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Forum topic by 716 posted 02-13-2016 05:44 AM 728 views 0 times favorited 14 replies Add to Favorites Watch
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716

502 posts in 381 days


02-13-2016 05:44 AM

I need a small clarification here:
Is “magnetic switch” a device that disconnects during power loss and stays off when the power is restored until turned on manually?

-- It's nice!


14 replies so far

View 01ntrain's profile

01ntrain

146 posts in 535 days


#1 posted 02-13-2016 05:48 AM

Yes!

View 716's profile

716

502 posts in 381 days


#2 posted 02-13-2016 05:55 AM

I am asking because the manual to my Grizzly hybrid in many places refers to a “magnetic switch”, which I remember back from my childhood worked as I asked in OP. However I had a power loss and left the shop. I cannot describe my horror when the power restored and I heard the table saw running by itself in the garage.

-- It's nice!

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1774 days


#3 posted 02-13-2016 07:57 AM

Karma says “if anything can go wrong, it will”

-- Alaskan's for Global warming!

View BonPacific's profile

BonPacific

20 posts in 320 days


#4 posted 02-13-2016 08:01 AM

Yikes, sounds like a call to grizzly could be in order. I’m not sure how a mag switch could break in such a way to remain on, but I’m not an electrical engineer.

Seems like even with mag switches we should pull the plugs when the power goes out.

View ste6168's profile

ste6168

250 posts in 636 days


#5 posted 02-13-2016 12:22 PM



Yikes, sounds like a call to grizzly could be in order. I m not sure how a mag switch could break in such a way to remain on, but I m not an electrical engineer.

Seems like even with mag switches we should pull the plugs when the power goes out.

- BonPacific

I don’t think it was a switch failure, rather operator error because he was under the assumption a mag-switch was installed. Not even certain you could refer to that as operator error? My grizzly hyrbrid does not have a mag-switch. Which model do you have, 716?

View hotbyte's profile

hotbyte

842 posts in 2440 days


#6 posted 02-13-2016 12:43 PM

Regardless of how switch should operate, why not turn switch off when leaving the shop? Or, even immediately when power went off.

View Fred Hargis's profile

Fred Hargis

3942 posts in 1958 days


#7 posted 02-13-2016 01:15 PM

That’s either not a magnetic switch (despite the manual references) or it’s defective. Replacing it with a regular one is easy to save money (for Grizzly), and they may have chose (or forgot) to update the manual.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Nubsnstubs's profile

Nubsnstubs

826 posts in 1195 days


#8 posted 02-13-2016 01:17 PM

Hotbyte, if your machines are hardwired, you can’t unplug them. But, there is always that good old forgotten breaker panel, and turn off the breaker…........ Jerry (in Tucson)

-- Jerry (in Tucson)

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hotbyte

842 posts in 2440 days


#9 posted 02-13-2016 01:27 PM

Didn’t say unplug…I said turn off switch. From posts, it reads like he was using saw and power went out. He left shop with switch in On position assuming it was a mag switch and would not turn on if power was restored.


Hotbyte, if your machines are hardwired, you can t unplug them. But, there is always that good old forgotten breaker panel, and turn off the breaker…........ Jerry (in Tucson)

- Nubsnstubs


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MrUnix

4229 posts in 1663 days


#10 posted 02-13-2016 07:15 PM

The manual talks about a mag starter box that gets installed on the back of the saw, yet the pictures from Grizzly don’t show one… and the manual says the switch type is just an on/off push button type in the specifications, yet calls it a mag switch later on. Parts diagram for the saw shows a simple on/off switch w/paddle and a breaker that can be changed for either 120 or 240v operation. Seems like the manual was edited from previous/other models and isn’t entirely accurate. Doubt that’s a mag switch.

Cheers,
Brad

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

View ThomasChippendale's profile

ThomasChippendale

244 posts in 397 days


#11 posted 02-13-2016 08:27 PM

Its easy to find out, disconnect your machine while it is running and plug it back, it should not start again with a magnetic switch.

-- PJ

View TopamaxSurvivor's profile

TopamaxSurvivor

17671 posts in 3140 days


#12 posted 02-14-2016 02:36 AM

If the magnetic motor starter is wired with momentary on/off buttons, it will stay off when power is lost. If a magnetic motor starter is wired to a maintained on/off switch, it will turn on when power is restored if the switch is on. Your saw has a maintained switch in the circuit if it started when the power was restored. No ands, ifs, or buts about it. Motor control 101.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View 716's profile

716

502 posts in 381 days


#13 posted 02-17-2016 06:51 PM

Yest, most probably it was copy/paste mishap by someone who wrote the manual. I asked Grizzly about it and got quite an unexpected answer. They want to send me a new switch :-).
Too tempting to get it, moreover I need one for the router table, but my conscience would eat me alive every time I turn on the router then. I think I will pass.

-- It's nice!

View ohtimberwolf's profile

ohtimberwolf

634 posts in 1817 days


#14 posted 02-18-2016 01:30 AM

716, wise choice…

-- Just a barn cat, now gone to cat heaven.

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