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(solved) Need help with pneumatic-electric switches inside motor unit

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by fezder, Jul 30, 2017.

  1. fezder

    fezder Well-Known Member

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    Right, my neightbor gave this project. He salvaged old massage table, or operating table of doctor. Etiher way, table has two motors, which operating voltage is 230vac, but control is air-controlled. More specifically, switches inside are pneumatically controlled. If I'd have original control module, I wouldn't have to ask this, but what approaches is there to make these motors work? I've succeeded in testing reasons with medical syringe, that motors do work, as well as that switches operate using air. (blue box in photo)
    link to photo:

    http://i.imgur.com/MBJJh5k.jpg

    other option would be to hardwire control wires to external switches and replace these pneumatic switches with 6-wire cable. There's two microswitches inside of that blue box,NC/NO contacts?
    And, here is photo of motor ID plate:

    http://i.imgur.com/IDwayC6.jpg

    So, basicly I'm looking for way to operate these original switches without external compressor, no idea if it's possible. But, I hear you guys suggestions!
    Thanks! Ask if anything is confusing.
     
  2. flatfootskier

    flatfootskier Member

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    It was possibly just using a foot operated 'bellows' How do you want to operate it? Intermittently, by hand/foot/controller/?
     
  3. alec_t

    alec_t Well-Known Member Most Helpful Member

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    The use of pneumatic switches may have been to ensure electrical isolation, so if you intend replacing them you may wish to consider using opto-isolation instead.
     
  4. dave

    Dave New Member

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  5. fezder

    fezder Well-Known Member

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    Thanks guys. Yeah, about operating, customer is ok with either hand or feet operation (he was asking for feet operation, forgot to mention that). I was too thinking of isolation issues, but didn't think of using optoisolators.
     
  6. JimB

    JimB Super Moderator Most Helpful Member

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  7. fezder

    fezder Well-Known Member

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    Well, considereing work, that switch you linked JimB is good option!. I'll see if I can source that locally.
     
  8. JonSea

    JonSea Well-Known Member

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    There are pneumatic switches for garbage disposals and hot tubs. You might want to check with a plumbing supply store.
     
  9. flatfootskier

    flatfootskier Member

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    Toilet cistern flush panel- many of them are pneumatic
     
  10. fezder

    fezder Well-Known Member

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    Thanks for replies. I asked local pneumatic stores but couldn't find any suitable switches. But, I found plumber store that sells switches. I sent query about how tube is connected, but so far seems I found the solution!. Hopefully, this project has been bugging me many months...
     
  11. fezder

    fezder Well-Known Member

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  12. JonSea

    JonSea Well-Known Member

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    That's exactly what I was thinking when I suggested garbage disposals.
     
  13. JimB

    JimB Super Moderator Most Helpful Member

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    A good solution.

    JimB
     
  14. flatfootskier

    flatfootskier Member

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    A massage with an, err, happy ending....
     
    • Funny Funny x 1

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