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Thread: 1200 watt moving mirror fixtures, cheap - upgrades?

  1. #1
    Join Date
    Apr 2008
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    Default 1200 watt moving mirror fixtures, cheap - upgrades?

    I probably won't do this because it would be investing money in dead tech or whatever... But.

    I own a pair of Martin Roboscan 1220 XPRs (or maybe RPR.) They're massive 150 pound moving mirror fixtures. Their main drawback is the moving mirrors are more limited in Y axis than Cyberlights. But they're beautiful internally.

    I always toyed with the idea... there are Chinese made electronic ballasts that use switch mode power supplies I assume to drive the lamps. In the Roboscan there is a massive transformer for lamp ballast, then a fairly large transformer for the robotics and circuit boards.

    What if it was converted 100% to the switch mode style supplies? I wonder how much weight it would shed. Would they become easy to fly, but still have the fairly high output? Or have LEDs just blown past the 1200 watt MSR and HMI bulbs?

  2. #2
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    There are some cheap R7 lamp+ ballast kits available. Worth a try.

    https://www.aliexpress.com/item/2020...020947056.html

  3. #3
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    Oh, these are 1200 watt fixtures.

    The ballast would be something more along the lines of this:
    https://www.aliexpress.com/item/Elec...497708389.html
    Not exactly chump change.

    Martin replied to me rapidly on my request for schematics for the fixture. They said they do not support modifications from the original design and that I need to contact a service center for support.

    So posted on the internet.

    There are two transformers, one is the lamp ballast and the other is provides power for the motors. Who knows what they're running the steppers on so that could have gnarly voltages. It might just be heavy due to all the taps for different voltages as well.

    It would be amazeballs to take it from 155 pounds to 60 or such. Pulling the internal assemblies out -- they're not that heavy (rotating prism or rotating gobo modules.) The case parts seem like very lightweight aluminum also.

  4. #4
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    Default

    Okay have a lead on the schematics. That will give me an idea of the feasibility.

    I think the lamp dimming is mechanical so if that isn't an issue an upgrade could be straight forward.

  5. #5
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    Feb 2008
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    Northern Indiana
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    I have a few 1220's collecting dust too. I often think about what could be done to lighten them up. I wonder if a 7R retrofit would be that much less bright than the original 1200W? The old lamp housing/ light collecting optics looks to be very inefficient. The 7R with its built in reflector might actually have close to the same throughput. I would be interested in the schematics if you get them.

  6. #6
    Join Date
    Feb 2008
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    Default

    This thread regarding converting a Clay Paky Goldenscan 3 to LED may be of interest.
    If you search Blue Room forum there's another thread detailing conversion of Clay Paky Mini Scan 300 to LED as well.

    https://forum.speakerplans.com/gs3-t...opic97027.html
    http://www.facebook.com/SubsonicSystems
    http://www.frikkinlazors.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

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