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Thread: DIY safety shutter

  1. #1
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    Default DIY safety shutter

    Found this, looks interesting and detailed ...

    http://massey.dur.ac.uk/resources/ge...s/shutters.pdf

  2. #2
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    Does anyone know of a complete shutter and driver assembly, bit like the STP8 but with a gravity and spring return rotary or plunger solenoid as opposed to a stepper motor?

  3. #3
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    GM20 and a simple driver?
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  4. #4
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    Quote Originally Posted by FourDee View Post
    Found this, looks interesting and detailed ...

    http://massey.dur.ac.uk/resources/ge...s/shutters.pdf
    I tried the electromagnet setup. It works OK during short workbench tests but fails at frequent use in humid, greasy environment of lasershow industry. Hazer oil sticks everywhere, glues dust and soon prevents moving parts from sliding. Either in on or off position. I'd suggest sticking to a flag idea. For that I like Ledex rotary solenoids, however even the ones designed for continuous operation (not every one is!) show a tendency to run hot, so an extra resistor with a switch is welcome at already-open-energized position.
    Piotr.K

  5. #5
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    Quote Originally Posted by dave View Post
    GM20 and a simple driver?
    I was just wondering if there's was a ready made assy with solenoid/driver on a height adjustable bracket type thingy available from anywhere - before I go and make a few

  6. #6
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    Quote Originally Posted by p1t8ull View Post
    I was just wondering if there's was a ready made assy with solenoid/driver on a height adjustable bracket type thingy available from anywhere - before I go and make a few
    Hmmm... "Make a few"... If you're thinking of perhaps selling one please put me on the list.

    Thanks

    Jem
    Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.... Douglas Adams 1952 - 2001

  7. #7
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    Only 1 potential catch I can see with that design, using the guys specified parts.. The specified solenoid only has a 25% duty cycle, so if my thinking is correct, its not really suitable for continuous operation.. kind of like the ledex solenoids.
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  8. #8
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    Quote Originally Posted by p1t8ull View Post
    I was just wondering if there's was a ready made assy with solenoid/driver on a height adjustable bracket type thingy available from anywhere - before I go and make a few
    Im sure I saw a company who makes laser beam shutters in Pangolin's resource section... Bet they are not cheap tho...
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