Enttec OpenDMX + QLC + Showtec LED bars = weird behaviour
Posted: Wed Apr 24, 2019 9:39 am
Hi,
I'm a newbie when it comes to lighting and for the start I got myself a relatively simple setup containing a OpenDMX USB interface, three Showtex Pulse Pixel Bars (connected in series), controlled of course by QLC+ (4.12.1). The chain is terminated by a 110 Ohm resistor terminator.
The LED bars are set to Pixel Control Mode (64 channels per fixture).
Basically the setup works but there are two major problems that I can not get under control:
- in this example only the middle fixture should flash up blue. while turning off, both of the other fixtures flash uncontrollably in random colors:
- in this example all three fixtures should flash up simultaneously. but the last fixture in the chain always lags behind half a second or so. furthermore, it turns off by flashing partly or fully, randomly.
I have already googled a lot but did not find any information on these particular problems. I have already tried to lower the frequency of the interface (down to 30Hz), which changes something (the patterns of flickering change), but does not resolve the problem.
Now the question: Are my fixtures broken? Should I try another DMX interface (some people have recommended trying Artnet instead of USB)? Or is it maybe a configuaration problem in QLC? I am completely startled, restarting the system, changing the cabeling, trying other power outlets, nothing worked.
Thanks for any help!
I'm a newbie when it comes to lighting and for the start I got myself a relatively simple setup containing a OpenDMX USB interface, three Showtex Pulse Pixel Bars (connected in series), controlled of course by QLC+ (4.12.1). The chain is terminated by a 110 Ohm resistor terminator.
The LED bars are set to Pixel Control Mode (64 channels per fixture).
Basically the setup works but there are two major problems that I can not get under control:
- in this example only the middle fixture should flash up blue. while turning off, both of the other fixtures flash uncontrollably in random colors:
- in this example all three fixtures should flash up simultaneously. but the last fixture in the chain always lags behind half a second or so. furthermore, it turns off by flashing partly or fully, randomly.
I have already googled a lot but did not find any information on these particular problems. I have already tried to lower the frequency of the interface (down to 30Hz), which changes something (the patterns of flickering change), but does not resolve the problem.
Now the question: Are my fixtures broken? Should I try another DMX interface (some people have recommended trying Artnet instead of USB)? Or is it maybe a configuaration problem in QLC? I am completely startled, restarting the system, changing the cabeling, trying other power outlets, nothing worked.
Thanks for any help!