120 volt electricity switching question

[ebinmaine 67,517]

We had a Porter Cable brand sliding compound miter saw.

It is most often connected to a 6 gallon Shop-Vac for its dust evacuation.

Both of these machines work quite well but they are baseline machines with no fancy options.

It would be nice if I could turn the Shop-Vac on using the power flow of pressing the switch on the miter saw but I DON'T want to get into rewiring.

 

Not a big deal. Just a convenience factor. Just wondering if there's any simple switch or sensor that could be tossed into the mix that would make this happen.

 

 

[Pullstart 62,899]

What about a foot pedal switch feeding both machine EB?  My only negative I can think of is the spool time of the vacuum.  You’ll be running the saw before the full auction happens.

[ebinmaine 67,517]

2 minutes ago, Pullstart said:

What about a foot pedal switch feeding both machine EB?  My only negative I can think of is the spool time of the vacuum.  You’ll be running the saw before the full auction happens.

Not a lot of spool up time on those.

A second maybe? Not a big deal.

 

I do like that foot switch idea.

 

[Pullstart 62,899]

Good handful of options.  Make sure whatever you get, it’ll handle the amp load of both units 

[Pullstart 62,899]

Image…

[oliver2-44 9,756]

This switch is made just for that purpose.  The jungle site has several of these.

https://www.amazon.com/iVAC-10031-010-Automated-Vacuum-Switch/dp/B0035YGLZG

[wh500special 2,184]

2 hours ago, oliver2-44 said:

This switch is made just for that purpose.  The jungle site has several of these.

https://www.amazon.com/iVAC-10031-010-Automated-Vacuum-Switch/dp/B0035YGLZG

 

Exactly!

 

One of the best inventions ever.  The version Oliver linked enables you to plug into two separate circuits.  One like  THIS ONE (there are many on the market) goes into a single outlet. 

 

When you turn on the saw with the saw's trigger the device senses the current flow and - after a short delay - turns on the accessory outlet into which your vacuum is connected.  When the saw is shut off the device keeps the vacuum running for a few seconds to clear the hose.  No manual intervention required.

 

If you're not already waiting for the saw blade to come up to full speed before plunging, you should.

 

There are also a bunch of shop vacs (fancy people like me call them "dust extractors") on the market these days that have a built in outlet that accomplishes the same task.  Many of them are whisper quiet and are also variable speed which is useful when connected to small sander or such.  They tend to be kind of pricey though.  Like this...

 

Steve

Edited October 31, 2022 by wh500special

[rmaynard 15,471]

I have the lights in my sand blaster cabinet and the vacuum cleaner plugged into the same outlet which is controlled by a switch. One flick of the switch and both are on. 

 

[Racinbob 11,081]

18 hours ago, wh500special said:

 

Exactly!

 

One of the best inventions ever.  The version Oliver linked enables you to plug into two separate circuits.  One like  THIS ONE (there are many on the market) goes into a single outlet. 

 

When you turn on the saw with the saw's trigger the device senses the current flow and - after a short delay - turns on the accessory outlet into which your vacuum is connected.  When the saw is shut off the device keeps the vacuum running for a few seconds to clear the hose.  No manual intervention required.

 

If you're not already waiting for the saw blade to come up to full speed before plunging, you should.

 

There are also a bunch of shop vacs (fancy people like me call them "dust extractors") on the market these days that have a built in outlet that accomplishes the same task.  Many of them are whisper quiet and are also variable speed which is useful when connected to small sander or such.  They tend to be kind of pricey though.  Like this...

 

Steve

 

Now that one I like. It addresses the potential pitfalls of starting two motors at once. Plus you can operate your saw as it was intended, by the handle switch. There is no lock on capability so you'd have to rig something up. Then I'd be thinking safety issue. $50 well spent in my mind. 

[squonk 41,120]

You guys keep making me think of funny stories.

I had to change out a water cooled semi hermetic compressor. It was located in the boiler room right next to a 100 High pressure boiler at the hospital. Our lead mechanic brings me one of those giant pedestal fans from the other boiler room. Plugs it in and says " here I brought you a present" Fan turns on and blows hot air but it's better than nothing. He leaves and in a little while I notice the fan isn't running. I keep working as it really wasn't helping much. After a while he comes back and notices the fan not on and says " I bring that fan down here and you turned it off!" I said "no I didn't it turned itself off!" He starts to fiddle with it and all of a sudden it turns on scaring the crap out of him.

 

Come to find out he plugged it into an outlet that energized when the boiler feed pump came on. It was an old outlet for a chemical feed pump. 

[Handy Don 12,232]

l

21 minutes ago, squonk said:

He starts to fiddle with it and all of a sudden it turns on

Good way to cause a "Lost Time" on-the-job injury. Lucky him.

[formariz 11,987]

@ebinmaine I have used these devices for over 30 years. They are invaluable for their intended purpose. They delay the turning on of the vacuum not only to prevent overload from the two motors but also disconnect vacuum a few seconds later to allow hose to clear. 
 The draw back on the one suggested by @oliver is that it’s amperage rating is too low. I use mine sometimes continuously for over 20 minutes or more when using router table. The plug overheats and start melting. Something to be careful with. I already replaced it a few times and keep spares handy.

 The smaller unit is great for a single tool such as a motorized miter saw specially at a job site.

 

 

 

Edited November 3, 2022 by formariz