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Thread: swami makes some lumia

  1. #1
    swamidog's Avatar
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    Default swami makes some lumia

    (part 1)

    i saw my first lumia projection at gates planetarium in denver. i loved that place. wonka tours of light and sound. boiling clouds and galaxies. patterns. dream fogs. ghosts. i could not figure out for... the .. life.. of me.. how they were made. what aliens taught us to make that light?

    magic i thought, and tucked it away for later. i was thirteen. there were girls.

    fast forward.

    i go to a thing every year. nukestock. a gathering of friends and the kind of family that doesn't depend on blood. the riff-raff of us in the atomic sci-fi town of las cruces. nuclear woodstock. children of the atom. all of us aliens in this desert. we drove motorcycles and made flamethrowers and performance art. now we're scientists, and kernel hackers, and teachers, and doctors. i liked the old ways better.

    i always try to bring a little something special to our gatherings.

    last year i bought a lumia kit from dz. hankscraft motor and shower glass. got some flexmods and diodes. did a lot of reading and learned some magic. my monkeyhands made a little rgv lumia box. it's sitting on my coffee table. i still use it.

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    somewhere along the line i developed a habit. i think we all do. we get hungry for more light. stranger reactions. better magic. it gets in our veins like junk and keeps us up at night. we rationalize. it's science. it's physics. it's optics. it's all of those things, but it's none of those things. it's just addiction.

    there's this guy... dslijon. he was selling lumia kits with multiple motors and wheels. i bought one. i spent a week experimenting. getting lost in the galaxies. drifting. just thinking. experimenting. closing my eyes and spinning. then i stacked wheels and everything changed. galaxies became organic. spiral arm pseudopods. non-linear complexities. my wall developed a crack into somewhere beautiful.

    i got tired of burning my fingers right around the time cheap blue diodes came out. i decided to make something.

    i bought dichros from one stop and beam combiners from laserman532. i soldered things too small to see and learned about aligning near field and far. i made white light, grinned big, and reached for diffraction grating.


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    i needed a box. i think it was heroic and mr.coffee who suggested gator cases. i bought a 6u rack mount case. it was excellent, but plastic and flimsy. i worried about burning holes through it. i bought a bending press and learned to fold sheet metal. i voided warranties.

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    i bought corner braces and aluminum plates and spent some cozy time with my pal the drill press. there is something gratifying about grinding through 3/8" plate. big pencil shavings of corkscrewed aluminum. spirals of silver worm toothpaste. i keyed one mount with two bolts to keep the corners straight. i learned the hard way not to de-burr the holes with my fingers. i bought bandaids.

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    i spray painted the inside flat black.

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    the clock was ticking.. fast. i started getting really worried about finishing before i headed to las cruces.



    to correct the bad beams from the blue diodes i designed a module using a cnc bearing mount and a prism pair from p1t8ull.

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    i needed red, so i built one of laserman532's dual beam kits with a pair of 660 long can diodes. tuned it for 400mW and aligned it at 40 feet. i modified the kit a little by swapping the flexure mount with a micro-mini and the laserwave pbs with a cube from an old hene laserdisk player (thanks mr.coffee). i wired 10k ohm pots on the modulation lines of the blue and red lasers to make brightness adjustments easier.

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    i recycled an old aixiz green laser and started on layout. i used sticky putty to hold everything in place, then marked positions on the board and drilled holes. once i had everything mounted and aligned, i color balanced for white using a 7:9:1 ratio of blue:red:green.

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    Last edited by swamidog; 12-02-2010 at 22:54.
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  2. #2
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    Default swami makes some lumia (part 2)

    (part 2)

    to counter-rotate overlapping lumia wheels i designed a motor assembly with pulleys and belts. i used lightwave to do the virtual work then built a cardboard mockup to check for problems before working the metal.


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    i cut the lumia wheels out of acrylic. i used a hole cutting bit and my drill press. this was an exercise in loud noise, smoke, and tiny pieces of molten plastic showering my hands. i expected the police to investigate the two am banshee noises from my garage. after cutting the disks, i gently deformed them with a torch then glued on bits of diffusing plastics and diffraction gratings that i cut out of laserium glasses. i started thinking of it as a laser eggbeater.

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    i built two small motor controller circuits so i could vary the speed of each motor.

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    i mounted the egg beater then roughed out the position for the upper deck. when i was satisfied everything would fit and wasn't blocking any optical paths, i marked positions, then stripped the board and drilled holes for the threaded rod supports.

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    then i put everything back together and mounted the power supplies on the top deck.

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    i minimized connections between the top and lower decks by running 5v and 12v lines to fused distribution blocks on the lower deck. from there, i wired everything to buss blocks, then bundled and labeled all the wires with zip ties and mounted them to the base plate.

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    i got lost in the light for a while.

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    i fit the guts back in the gator case then cut and drilled sheet metal panels and mounted fans. finished with seven hours before i needed to hit the road.

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    they didn't warn me about the spaceport conference in las cruces. no vacancies. i got lucky and found a room in a hotel full of rocket scientists and government officials. long hair, skull shirt, and two crates of mcgyver laser hardware. i got the stink eye something fierce. my only regret was not thinking to stencil "live human organs" on my crates.

    i built a screen and mounted everything well over head. masked the edges of the aperture so it was impossible for the light to overflow the screen.

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    two days into nukestock and i realized i didn't build a laser projector.. i made a really heavy screensaver.
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  3. #3
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    Hey there Mr. CS...

    Quote Originally Posted by swamidog View Post
    magic i thought, and tucked it away for later. i was thirteen. there were girls.
    ...beautiful prose, but, uh... can't see a *single* one of yer pix... would-so love-to, too! (great story! ....is it just me? Anyone else 'see the light(s)'?...

    ...standing-by for knarly lumia-factor10...
    j
    ....and armed only with his trusty 21 Zorgawatt KTiOPO4...

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    There was some operator error on my part. Try it again..


    Quote Originally Posted by dsli_jon View Post
    Hey there Mr. CS...



    ...beautiful prose, but, uh... can't see a *single* one of yer pix... would-so love-to, too! (great story! ....is it just me? Anyone else 'see the light(s)'?...

    ...standing-by for knarly lumia-factor10...
    j
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  5. #5
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    Wow!, just wow. Simply beautiful and inspirational, well done.

    As soon as funds recover from all the money i've spent on holography my next project is a lumia projector .

    Cheers

    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

  6. #6
    soforene's Avatar
    soforene is offline The Troll formerly known as Herbert Von Poople-Futtocks
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    Cool

    Nice though they are, <Devils Advocate Mode> aren't all lumia projectors kinda one trick ponies?
    I mean, you can turn 'em on and they do their thang but that's it.
    A proper projector does so much more (via the magic of scanners) than just display pretty patterns.

  7. #7
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    Done properly, lumia effects are quite simply, beautiful .

    If you only have one lumia wheel then yes, I agree, the effects are limited. However, if you add more wheels in a contra rotating motion then the range of effects goes up exponentially. Add some galvo's into the equation and the effects are pretty much limitless.

    I have enough spare lasers/dicros/optics/mounts to make up an RGB lumia projector. I just need to work on the diffraction gratings and wheels/motors. I also need someone to make a law that gives me 6 months holiday per year

    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

  8. #8
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    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Swami, nice, awesome, work.. One of the best crafted pieces of gear I have ever seen on PL

    That said,

    Quote:

    "I mean, you can turn 'em on and they do their thang but that's it."

    Soforene, some days I wonder who is more "F"ed up in the head, me or you?

    Lumia as a one trick pony? Man, you need to get out more!


    Steve

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    As always Swami-I am amazed.

  10. #10
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    soforene is offline The Troll formerly known as Herbert Von Poople-Futtocks
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    Quote Originally Posted by mixedgas View Post
    .....Soforene, some days I wonder who is more "F"ed up in the head, me or you? ....
    That would be you, Sir.

    And this has been confirmed by the Irish Wombat (Paddy O'Guinness) that lives in my left sock.

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