remote 'finger' to push on/off button

Discussion in 'The Projects Forum' started by jesse c, Mar 1, 2016.

  1. jesse c

    Thread Starter New Member

    Mar 1, 2016
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    I have a remote control wireless switch and would like to create a pair of momentary solenoid activation that i could create 'fingers' that would push the buttons on my table saw dust collector. One solenoid for off the other solenoid for on. This is 3 phase saw so no commercial remote that i can find and would enjoy the electo-mechanicl build anyway
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    You're better using two relays to switch your saw on/off, controlled from the receiver, have you got any information on it?
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Instead of a solenoid why not a momentary relay in parallel with the P.B.'s.?
    Max.
     
  4. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    IIRC the switch actually is a rocker inside, despite the two planar buttons outside. Still, an ebay wireless remote AC outlet and an AC-coil contactor gets you 3-phase on/off with nothing but a screwdriver.

    ak
     
  5. jesse c

    Thread Starter New Member

    Mar 1, 2016
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    i do not want to do any modification to main switch internally as it does not belong to me ,that is why i want to create some mechanical 'fingers' that will momentarily push the buttons for me. The main switch box is metal so am hoping to create 'finger mechanism' that i can attach ,and remove, maybe useing magnets or at most a couple sheet metal screws
     
  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    then good luck in your adventure....
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    You may need to use what is known as a thrust solenoid, rather than the common Pull plunger type, there are a few makes out there, depending where you are located.
    Some of the 3 phase start/stop stations used the Start PB to manually push the retaining contact over of the contactor, cheap way of doing it.
    Max.
     
  8. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Buy one of these...

     
  9. jesse c

    Thread Starter New Member

    Mar 1, 2016
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    funny but close to what i want.Probably more complex than what i want too.
     
  10. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Have you measured the force required to activate? May be several pounds. What power do you have available?
     
  11. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Took a quick look at Electronic Goldmine & found two that might work, 120V AC, & 12V DC, About 7 lb. pull.
    Might use a teeter-totter to convert pull to push or for me, I'd drill & tap the armature for a 1/8 in. rod & drill frame to clear. Add a soft foot to rod.
     
  12. jesse c

    Thread Starter New Member

    Mar 1, 2016
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    excellent,thanks for the Electronic Goldmine suggestion. I love catalogs like this in general and the solenoids are just what i am thinking about
     
  13. Sensacell

    Well-Known Member

    Jun 19, 2012
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    This is like trying to scratch your back with a 20 foot pole.

    Can you just leave the saw switch ON and build an external box containing a relay / contactor?
    Just connect the power to this unit- no saw mods necessary?

    Making mechanics to do this is going to be much harder than you imagine, and you might even break the switch in the process.
     
    GopherT likes this.
  14. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Right, and with no assurance it will turn the saw off when you really need to turn the saw off! Making Gerry-rigged switching mechanism for one of the most dangerous tools on the market is ridiculous.
     
  15. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    By the way, any "DIY wireless" like 413 MHz transmitter receiver pairs are an accident waiting to happen. Imagine changing out your dado head and suddenly, some interference causes the blade to spin up? Good luck but I can neither think of a need for Wireless or a safe way of implementing it.
     
  16. jesse c

    Thread Starter New Member

    Mar 1, 2016
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    Sorry for my bad info starting this thread BUT this remote build would be for the VACUUM system not the saw itself . Presently the vacuum on/off switch is about 100ft from saw so often does not get turned on for medium to small jobs due to laziness.
     
  17. shortbus

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    Sep 30, 2009
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