Dimmer Attribute Issue

[kimabiz]

Hey, 

Im trying to get my led bars to work properly (https://www.thomannmusic.no/stairville_led_ip_bar_3208_rgb_dmx_ip65.htm) and the issue I cant seem to figure out is how to get the dimmer attribute to not fire of all led diodes?

The bar is set to 26chan mode

INT is set to 49.9, 

Dimmer can be whatever 0-100 - it fires of all leds no matter.

This is what I am experiencing; 

Dimmer attribute fires off everything, even if I haven't selected a color. This means I cant send signal to just a couple of "pixels" on the bar and have the rest black.

Primary color Blue comes out as half of the "pixels" blue and the other half green. When set to Green it just switches which pixels are Blue and Green. 

Red is fully red, nothing else. Every color mix except primary colors come out as white. So I have 1 solid color(Red) and two opposite mixes of Green and Blue.

What I want: 

For pixels to keep black if they are not in use and colors to be what they should be :)

Have anyone stumbled across this issue before or maybe have some ideas? I tried searching the group, but couldn't find anyone discussing this :/  

Thanks 

 

[Mathieu]

If a fixture has a dimmer, intensity attributes have a default 50% value. What you want to do is to create a "default" grid with all intensity attributes at 0%. This way, when no other grids are using some intensity attributes, the LEDs will be off.

Alternatively, if you don't need the dimmer, edit the fixture template and replace the dimmer by a fixed attribute with a 100% value.

[kimabiz]

Thanks for the answer, But I dont get the disred effect out from it :/ 

If the Int defaults at 50% when its at 0%, shouldnt I be able to see colored lights without doing anything to the Int? I get zero light when the value is at 0% and at once I hit 1% I start seeing all the lights again (as should be obvious since its turning towards white) 

Any ideas what else I could try? 

[Mathieu]

You can post your project file. Something doesn't seem to work as expected...

[kimabiz]

Thank you, here is a project file where I have the same issue. 

Dimmer is fixed at 100%
INT - 0% I get no light

INT - 1,9% I get blended colors. (In this file the HUE is set to Blue. The output gives me a mix of Blue and Green on different cells off the light but is correct in the software.. See attached image)

When INT reaches a certain amount higher than this, it also adds the red diodes. As would be expected.

I also tried switching the colors of the cells that came out wrong. It worked to a certain degree, but it felt like unnecessary extra work and very chaotic when colors in the software didn't match the output.

Thanks in advance for your input on this, really appreciate it! 

[Mathieu]

It really looks like your fixture isn't configured to be in the 26 channels mode. You need to set the 26 channels mode in Lightjams and also physically on the fixture. Check the fixture's user manual to see how to change the mode.

Another possible problem is that the dmx start address is not the same in Lightjams and on the fixture.

Double check the fixture physical configuration for both the mode and address (meaning not in Lightjams but using the fixture control panel located physically on the fixture).

[im4...@gmail.com]

We are having the same issue here. We only want colors and not white at all. One of our fixtures have a dimmer channel and fixture was generated accordingly in Lightjams. However, all colors will not show up unless intensity is set to 50%. We have edited the fixture as per your suggestion to have a fixed attribute set to 255. But, we still need to set intensity to 50% for us to be able to see all colors. When there is no color, we need the fixture to be off and not white. When we do a color chase and there is a time when there is no color, fixture turns white. Please advice on how can we avoid this issue. 

Thanks,

Regards.

[Mathieu]

Hi,

It might be related to the way the fixture template has been created. If I remember from your other post, you've created one fixture template containing multiple different fixture types. If some fixtures have a dimmer and some don't, this will cause problem unfortunately. So that means that finally, the option to put multiple fixtures inside the same fixture template won't work in this case and you might need to path fixture one by one.

[Jatin V]

Hi Mathieu,

We ended up using individual fixtures and patched them all. We are not generating any template out of multiple fixtures. We have total of 1200 fixtures. One is RGBA and other one is RGBA with dimmer channel. As you can see in the attached example, whenever there is no color being produced, the fixture remains white. If you lower the intensity to 0 then you get no colors. How can we get fixture to be off when there is no color being applied?

Thanks,

Regards.

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[Mathieu]

Hi,

To turn off the fixture, you set the intensity to 0%. Or do you mean you want the fixture to be ON and gray? In this case, you set the saturation to 0% and you'll always get shades of gray.

[Mathieu]

Ok, I think I see what you mean. You want to control the intensity with a source having a varying range. Right now you are controlling the hue so that's why the intensity is not affected. See the modified project file.

[im4...@gmail.com]

Hi Mathieu,

        Thanks for taking a time to look into this. I see what you are doing - basically intensity needs to follow the colors. It does some extra work to every effect/scene but it is doable. Been used to the RGB world so its taking time to adjust to this concept.

Thanks again,

Regards.

[Mathieu]

The hue and the intensity are independent, allowing to, for example, modify the intensity while preserving the perceived hue. You can learn more about the relation between the hue, saturation and intensity (or luminosity) model VS RGB: https://en.wikipedia.org/wiki/HSL_and_HSV