Louis sullivan NLS Posted April 15, 2016 Share Posted April 15, 2016 Hi there,having trouble with our new LED PAR64s which are Lightmaxx 12x12w 6 colour units. They all seem to flicker, tried putting them in different configurations with and without DMX splitter, and still have trouble. sometimes they even cause other model fixtures in the chain to join in flickering. Ironically they are advertised as 400 Hz flicker free. any one have and ideas??thanks Link to comment Share on other sites More sharing options...
themadhippy Posted April 15, 2016 Share Posted April 15, 2016 what desk are you running them off? Link to comment Share on other sites More sharing options...
Louis sullivan NLS Posted April 15, 2016 Author Share Posted April 15, 2016 what desk are you running them off? Either a Showtec 12/24 'scene setter' style desk or Ergheiz Air DMX depending on apllication Link to comment Share on other sites More sharing options...
pjrails Posted April 15, 2016 Share Posted April 15, 2016 HiThis sound like you need a DMX terminator see this - LINK HTHPJ Link to comment Share on other sites More sharing options...
Louis sullivan NLS Posted April 15, 2016 Author Share Posted April 15, 2016 HiThis sound like you need a DMX terminator see this - LINK HTHPJ Hi there, tried terminator plugs end of chain and makes them worse.DMX is all correct polarity too as they all respond correctly to channels but just flicker Link to comment Share on other sites More sharing options...
alistermorton Posted April 15, 2016 Share Posted April 15, 2016 Do they flicker if you connect them individually straight to the desk with a short DMX cable and with a terminator in the fixture output socket? Link to comment Share on other sites More sharing options...
Louis sullivan NLS Posted April 15, 2016 Author Share Posted April 15, 2016 Do they flicker if you connect them individually straight to the desk with a short DMX cable and with a terminator in the fixture output socket? They seem fine individually, when connecting other fixtures they flicker, I have tested each cable individually and they seem fine too. The PARcans don't seem to want to play ball with each other Could it be weak DMX output from control devices? Bearing in mind the old LED PAR's never had problems, it's ever since these new ones came into operation... Link to comment Share on other sites More sharing options...
Shez Posted April 15, 2016 Share Posted April 15, 2016 It's quite likely that one or more of them is squirting their own DMX on to the line. If one fails to receive DMX, they can sometimes default to generating their own. I can't find a manual online for those particular fixtures - does it mention anything about them operating in standalone mode or master/slave modes? I would test all your cables thoroughly (including checking that there's no continuity to the XLR shells) and then build up the line one fixture at a time to try to identify which one is going rogue. Link to comment Share on other sites More sharing options...
Don Allen Posted April 16, 2016 Share Posted April 16, 2016 This may be one of those situations where it may be easier to feed each group of lights with their own DMX chain. If it is on a bar, get a truss mounted splitter or something small like an Enttec D Split . If the units can be a master or a slave, they are generating the DMX that goes out of the fixture, that other brand fixtures do not like. If they were not a master / slave fixture, I would suspect switch mode power supply noise getting onto the DMX line, which would need separate a DMX feed for them anyway. You could try putting any other fixture before your new led par 64's, to see if everything works ok, but if later on someone needs to add something on to the end of the DMX chain, they will have problems, which needs to be resolved well before show bumpins. Link to comment Share on other sites More sharing options...
Doric Posted April 19, 2016 Share Posted April 19, 2016 1460768808[/url]' post='537388']This may be one of those situations where it may be easier to feed each group of lights with their own DMX chain. If it is on a bar, get a truss mounted splitter or something small like an Enttec D Split . If the units can be a master or a slave, they are generating the DMX that goes out of the fixture, that other brand fixtures do not like. If they were not a master / slave fixture, I would suspect switch mode power supply noise getting onto the DMX line, which would need separate a DMX feed for them anyway. You could try putting any other fixture before your new led par 64's, to see if everything works ok, but if later on someone needs to add something on to the end of the DMX chain, they will have problems, which needs to be resolved well before show bumpins. Have you got a microphone cable in place of DMX cable. I did that and got flickers. Link to comment Share on other sites More sharing options...
timsabre Posted April 20, 2016 Share Posted April 20, 2016 Have you got a microphone cable in place of DMX cable. I did that and got flickers. This is a myth which we must stop perpetuating. Microphone cable, though not the ideal or the proper solution, does work fine for DMX unless you are going for kilometers with it. If you get flickering or other problems then you have a fault elsewhere. Link to comment Share on other sites More sharing options...
Stuart91 Posted April 20, 2016 Share Posted April 20, 2016 If a mic cable was used which ties the shell to pin 1, could that cause any problems? Link to comment Share on other sites More sharing options...
timsabre Posted April 20, 2016 Share Posted April 20, 2016 If a mic cable was used which ties the shell to pin 1, could that cause any problems? Only if there is another fault somewhere else. Pin 1 is normally chassis ground anyway. Link to comment Share on other sites More sharing options...
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