| TroelsM |
Hi.
By definition this should be in the Moving Image section as it projects image and moves it around.. :D
Now I'm placing it here to avoid the bashing from hundreds of angry home-movie-freaks..
Over the last couple of years I've build this beast. It's sort of a moving head as the ones made by Martin, SGM and others but with an twist.
Here's a link to some pics: http://www.kofoedmejer.squarespace.com/ -> pictures of projects
Have a look and tell me what you think.
Regards TroelsM |
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| TroelsM |
| Here's a shot with the bulb on: |
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| pinkmouse |
Excellent work Troels, that must have taken months, and cost a fortune! Though strictly speaking it's a moving mirror rather than a moving head, (AKA "Nodding Bucket" in the biz), but I'll let you off that! :)
What lamp are you using, and what size are the gobo slots? Are you going for HiRes DMX for Pan and tilt? How many control channels? Are the gobos rotatable/indexable?
BTW for our cousins across the water- a gobo is what you call a cookie! ;) |
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| TroelsM |
You're wrong! It took years but it didn't cost me a thing! -OK that's also not entirely true.. I've paid for some ball-bearings and nuts and bolts, but that's about it. Almost all the materials are from scrap-yards and the cost is about 1-2$ pr Kg..
Whether it's a moving head or a scanner.. well maybe a moving scanner head? The whole aluminium-head rotates and the little mirror does the rest of the movement. German GLP did the same a one point, but for some reason they don't use that method any more (to the best of my knowledge)
The gobo's are 28mm standard Martin-size. They can rotate and are very easy to replace with others. Sadly the gobos can't be returned to en exact position because there's no feedback to tell the control-logic any thing about the gobo-orientation.
At the moment it's a dead lump of metal as I haven't made any of the control-circuits. I plan to make some electronics in the next year or so. Probably based on PIC or Atmel procs.
Thanks for your comments.
Regards TroelsM
Edit: The gobos are cut from 0.1mm cobber-plate with a sharp knife!
Second edit: I'm using a 150W/24V lamp. Would like to use 250W, but them I'll have to make a better thermal design. |
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| pinkmouse |
| Well, you could always sort out some sort of optical sensor for gobo indexing, it doesn't need to be mechanical. HighEnd used to just have a little slot cut in the wheels. |
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| TroelsM |
You're absolutely right.
The feedback could be optical or magnetic, but I need to stop the mechanical development somewhere and I decided that this is it...
Maybe it will be added sometime in the future.
Regards TroelsM |
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| Enzo |
| Across which water? Where is it that gobos are called cookies? |
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| TroelsM |
Beats me! I've never heard anything else but gobo. BTW. what does it stand for? I've read somewhere on the www that it was something like Ghost before Objective = Gobo
Regards TroelsM |
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