Led flickers

[hoffmana1]

We have a wash of 4 tri led pars and when all of them are running at full they flicker every few seconds, the flicker is barley there but its enough to be noticed. Has anyone had similar issues in the past and what ideas do you have for the solution.

 

[Skervald]

Start with the simple stuff. Is your DMX run terminated? How many devices are on the run? How long is the run? Are you using DMX cable (vs. audio)? Does each instrument flicker when connected directly to the board?

 

[Harrison Hohnholt]

We have a wash of 4 tri led pars and when all of them are running at full they flicker every few seconds, the flicker is barley there but its enough to be noticed. Has anyone had similar issues in the past and what ideas do you have for the solution.

When you say every few seconds if you time it is it at the exact same time? If so it could be an RDM problem. Also test everything that Skervald said

 

[JD]

Do all 4 flicker in sync? If so, DMX is the suspicion. Could be a frame rate error, standing wave issue, or just plain ground loop. Many times, when LEDs are introduced into a conventional system, they may uncover something that has been a problem for many years, but has gone unnoticed. Conventional lights and dimmers are too slow to react to the occasional glitch. LEDs can react instantly and the result is now a problem that is visible. Don't know what type you are using, but I have often wished that LED fixtures would allow an "Incandescent Mode", which would emulate the response time of a filament based light source. (Fully expecting someone to post fixture models that already do that, but.. Hey, I'm retired!)

 

[hoffmana1]

They all flicker at the same time, they are daisy chained together but the its only 4 fixtures so we didn't think it should have been a problem. They are supposed to be self terminating but were going to try adding a terminator and see if that help.

 

[JD]

They all flicker at the same time, they are daisy chained together but the its only 4 fixtures so we didn't think it should have been a problem. They are supposed to be self terminating but were going to try adding a terminator and see if that help.

Self terminating.... Only the last one in the chain should be set to terminate. If more than one is, the DMX will be attenuated by the additional loading. What is the model?

 

[ship]

Tried a dummy load?