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Thread: Rotator Blocks for Lumia / Gratings

  1. #1
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Default Rotator Blocks for Lumia / Gratings

    I need to pay the car insurance. My local surplus place gets these out of medical laser printers where they rotate a pol cube or a waveplate. Three have a half inch clear hole and the one with the waveplate (#4) is about 3/8ths inch. Put some plastic burst grating stock on them from One Stop, or have a lumia that spins from its center instead of its side. They have stepper motors on them with belt reduction or gear drives, so pick your favorite 20$ stepper motor driver kit and rock on. Or easily replace the stepper with a DC motor.

    27$ each plus 7 dollars postal shipping in the US. Overseas buyers, note that you will have to pay actual shipping. Note these are big heavy blocks of aluminum with super stiff ball bearings to hold the prism.

    Pol cubes are held in with a epoxy. A hammer makes fast work of removing them. I've found most of the pol cubes are IR or deep red, so don't count on reuse. Note they spun the pol cube to set course intensity in the printer, not to combine/split the light.

    You cant buy the bearing or even think about milling the block for this price. Units 1,2,3 in the picture are fairly large, unit 4 is the tiny, thin, one.

    The top two in the picture are gear driven, and the other two are belt driven.

    Steve
    Attached Thumbnails Attached Thumbnails rotators.JPG  

    Last edited by mixedgas; 11-14-2011 at 14:32.

  2. #2
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    Is there a way to mount a larger round wheel onto this to use it in front of a scanner set to turn in scan through effects\? Confused you mention a hole is it just a spinning hole or is there a shaft that you could connect too?
    leading in trailing technology

  3. #3
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Yes,
    You could either place square stock in the hole, or drill holes in the flange (not seen in the pics, on the other side) on units one and two, and three in the picture. There are flanges and large gears to mount things to on the bigger three of the four units.

    Steve

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