trying to find an old thread..

[Young Johnstone]

Hi guys I have 100 odd ways of art 4k dimming that flickers at 33 percent. I'm sure I remember a thread about it! Can some one point me to it! Much thanks :-)

 

Extra stuff, it's a blunt post as I'm on site trying to sort this issue. Sorry :-)

I've searched but can't find anything, and can't remember to much about it. I think it may have been in relation to three phase or supply!

[pritch]

Not sure about the exact thread, but be warned that the BR search function seems to have issues with older threads. Google, with 'site:blue-room.org.uk' in the search term is your friend.

 

https://www.google.co.uk/search?source=ig&hl=en&rlz=&q=site%3Ablue-room.org.uk+dimmer+flicker&oq=site%3Ablue-room.org.uk+dimmer+flicker&aq=f&aqi=&aql=&gs_l=igoogle.3...419.1832.0.1976.12.2.0.10.0.0.347.426.1j3-1.2.0...0.0.#sclient=psy-ab&hl=en&q=site:blue-room.org.uk+dimmer+flicker&oq=site:blue-room.org.uk+dimmer+flicker&aq=f&aqi=&aql=&gs_nf=1&gs_l=serp.3...14274.14274.2.14983.1.1.0.0.0.0.53.53.1.1.0.c3Go2Gjosuw&psj=1&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&fp=dbf0b2a432817f4e&biw=1280&bih=800

[ramdram]

Would this be the "triplen" issue perchance?

 

This may be of use? But about 3years back.

 

http://www.blue-room.org.uk/index.php?showtopic=35052&st=15

 

More stuff on google:

 

http://en.wikipedia.org/wiki/Shared_neutral

 

http://www.ce-mag.com/99ARG/Martin103.html

[ianl]

Art 4k dimmers have a software bug

 

only a problem when using on single phase supply

 

when the dimmer auto detects single phase it claims to be loading single phase software but isn't. the lights then flicker randomly

 

solution:

 

remove power to one phase of the dimmer (ie remove one of the 3 control fuses)

turn on dimmer

dimmer gives message along the lines of "cant detect..... "

select single phase supply from the menu (down arrow from memory)

replace control fuse

 

repeat for each 12ch pack

[dave_m]

Belated reply dude, but I was looking for something the other day and I came across the ECN that should fix this.

 

Basically there's a problem with the control card in 4ks whereby a high neutral impedance, such as when running off gennies, will cause the zeroX board to not ... well, sense the 0v X point! You need to replace R32,33,34 with quarter -watt 330R resistors, instead of the 1K's in there!

 

Lovely racks, I remember them well!

[Young Johnstone]

Cheers lad, no idea why you didn't text me this but I suppose others can see it now!

 

Bet you remember the gig too :P

[dave_m]

I do remember repeatedly bashing my head against those racks while saying it was potentially down to zero-x, yeah! It's out there now, and I didn't have your number in my UAE phone! :unsure: