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11-13-2004, 01:42 AM
Didn't think it thru ehough, rotating the fixture would really not do anything more than throw shadows, regardless of the orientation to the tank
unless you used mirrors to actually bring the light down.
Maybe a better way would be to suspend it on a track and use a stepper motor to drive it back and forth, how much travel distance are you looking at for a complete pass (tank length minus fixture length)? How long of a photo period? Trying to get the majority of the variables together, I have a guy at the office who's pretty smart about steppers and stuff like this, I can pick his brain a bit Monday and see what he can come up with. Biggest factors I can see right off would be how much load could be moved to the bearing surface to be taken off the motor, then a failproof way to may sure the pendant changes directions when needed. I could invent a computer controlled way to do it using the parallel port, but adding that and a stepper motor and controller will start getting expensive quickly, but he's probably got a much simpler method using something that already exists, I tend to complicate things unessarily.
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