Paul_R Posted February 18, 2009 Share Posted February 18, 2009 Is a projector lamp or indeed the projector likely to suffer if used on a moving fly bar whilst turned on?It is an <LCD> NEC MT1075 if it matters, and the flybar is an automated system.. Personally I think that the jolts to the lit lamp could be detrimental to its lifespan?? Thanks,Paul Link to comment Share on other sites More sharing options...
Dj Dunc Posted February 18, 2009 Share Posted February 18, 2009 Though im not ENTIRELY sure it exists, and this is only a design concept I've had a while back it may be useful. Think how studio microphones are shock mounted, using bungee esque cord and a mounting, is it not possible to acquire / manufacture something that could be screwed in place of the feet and then attatched to the normal mounting plate? Thus when the move is halted, it absorbs more of the shock? Link to comment Share on other sites More sharing options...
ChrisD Posted February 19, 2009 Share Posted February 19, 2009 Your alignment will never be dead-on if you have a spring mounted projector. Think of the wobble as it stops... It's not going to be great for the lamp, but it depends how fast you want to fly it in and out. If the flys are automated, can you slow them before the dead? This is a case were a human might do a better job than a motor... Link to comment Share on other sites More sharing options...
dunk_1984 Posted February 19, 2009 Share Posted February 19, 2009 Duncan, certainly Barco projectors and probably others, have rubber mounts within the frame suspending the projector. Link to comment Share on other sites More sharing options...
blackbird Posted February 19, 2009 Share Posted February 19, 2009 If the flys are automated, then you should be able to specify slow decelerations, and equally apply an S-ramp or similar to the accel and decel phases, to control the jerk (derivative of accel) .... which I would suggest wouldn't lead to much if any jolting to the lamp. However if by automated you are talking a chain hoist, then your lamp is likely to take a battering! Link to comment Share on other sites More sharing options...
LXbydesign Posted February 19, 2009 Share Posted February 19, 2009 yes , ive had to do that at Sadlers Wells theatre - and their system is controlled by Nomad and you can have the bars slow right down towards end of travel and stop smoothly causing no jolt at all. I suspect this is the case with any other automation control but Nomad crossed my mind as its what they have at the venue. We also did it at a "national theatre" type conference venue in Monaco as well except the system kept crashing and nothing was moving anywhere!! That was a very tirsome day........ Link to comment Share on other sites More sharing options...
David Lee Posted February 19, 2009 Share Posted February 19, 2009 We also did it at a "national theatre" type conference venue in Monaco as well except the system kept crashing and nothing was moving anywhere!! That was a very tirsome day........ That'll be the Grimaldi. My colleague was there when it was new and had 8 x G8s and screens flying in with no problems. From what I gather it is becoming far less reliable nowadays and your post supports that view. Link to comment Share on other sites More sharing options...
LXbydesign Posted February 19, 2009 Share Posted February 19, 2009 yes dave! That was with MCM on the World Rally launch !! Link to comment Share on other sites More sharing options...
Pete McCrea Posted February 19, 2009 Share Posted February 19, 2009 Duncan, certainly Barco projectors and probably others, have rubber mounts within the frame suspending the projector.No they don't. And that's a fact, I can prove through owning several of the things. Our preference is that machines aren't moved once the lamps are struck. However if they were to be flown on an automated system where the acceleration and deceleration could be controlled to prevent sudden jolts, then I'd probably be ok with it. My concern arises from the high temperature and pressure of the lamps, and that if jolted, it could cause the envelope to fail. Link to comment Share on other sites More sharing options...
Paul_R Posted February 19, 2009 Author Share Posted February 19, 2009 Thanks for the help so far..Yes, its an automated flybar system not chain motors, although I do not know the capabilities of the control system.The venue in question is The Royal Spa Centre in Leamington Spa, Warwickshire. My gut feeling seems to right, but I will find out about the acceleration and deceleration options.. Thanks,Paul Link to comment Share on other sites More sharing options...
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