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Hot patching on a CD-80

Discussion in 'Lighting and Electrics' started by disc2slick, Apr 4, 2008.

  1. disc2slick

    disc2slick Active Member

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    Hey all,

    I know that, generally, one should not plug things like motors (or in this case, blenders) into dimmers for the sake of both the piece of equipment and the dimmer. Does this apply to dimmers that can be 'hot patched' on? I'm referring to on a CD-80 24-rack you can press the little light up button on the rack to keep it on at full intensity, does this make it okay? or at least less bad?

    P.S. The reason I am asking about plugging a blender in is because I work in an upscale 'event space' (or some such nonsense) where the only power that can be be easily custom distributed is out dimmers.


    Thanks a bunch,
    Dan
     
  2. JD

    JD Well-Known Member

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    Oh, I thought you were making Pina Coladas fro the crew!

    Actually, a blender motor is a brush type motor which will work at any voltage and even DC (blanket statement, there are always exceptions!) The biggest problems on dimmers are transformers and inductive motors under light load. In either case, the "flyback" voltages caused by the chopping of the waveform can do damage to the load equipment and the dimmers.

    I can not say if your dimmers or blender would be safe. I only know that I once had a roadie "borrow" one of my Scrimmeretts (back in the 80's) to get good speed control while making frozen drinks! Apparently, it worked very well, although I had not authorized this! ;)

    I would... ahhh... check with the manufacturer.
     
  3. TimMiller

    TimMiller Well-Known Member

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    If you have a couple extra modules laying around i'd just make some non dim modules. All you have to do is disconnect the control wires that go to the SSR, pull out the SSR and coil and make the wire bypass the scr and go directly from the line, through the breaker to the load.
     
  4. Footer

    Footer Senior Team Senior Team Premium Member

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    Those aren't actual non-dims, those are just a hot circuit. They do make legit non dim modules for the CD80's.
     
  5. phil000

    phil000 Active Member

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    Dan, I'm sorry I don't have any answers, I did it the other day, and I hope it doesn't do any damage, we ran a hazer off of it...well, because we had to.
    ...30 minutes later of browsing manuals...
    I think it might matter to what year it is as there are 3 different generations I think, so if you could let us know that might help as well

    I'll keep looking, maybe we can both help each other, or someone else might come along and help :)
     
  6. Darthrob13

    Darthrob13 Active Member

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    I think he has a 24 way pack.

    Official stance is that you shouldn't do this.

    Most likely the dimmer and the blender will be fine.....just make enough to share with the repair tech and you'll be fine.
     
  7. Flyboy

    Flyboy Member

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    Like everyone says, you're not supposed to do it; any problem in either the dimmer or the motor could damage one or both components. And even though I don't like to, I have managed in the past by hot-patching into dimmers. My old school actually has a habit of powering their moving lights from a "hot-patched" dimmer on their CD-80 rack (which is stupid because they actually have non-dim packs), and although I'm just waiting for something to go wrong, nothing has happened yet...
     
  8. TimMiller

    TimMiller Well-Known Member

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    What i was describing is the way strand makes their non dim modules for the CD-80. Its a module that bypasses all electronic control, and directly feeds power to the circuit off of the buss bar. The only form of control left is the over current device between the buss and the load. (the breaker between the buss (the BIG COPPER THING YOU NEVER TOUCH, THAT IS ALWAYS HOT) and the load (appliances, foggers, etc).
     
  9. icewolf08

    icewolf08 CBMod CB Mods

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    I think we are splitting hairs over true non-dim "constant circuit" modules and relay modules which you can turn on and off from the console, but when on are effectively the same as a non-dim.
     
  10. Footer

    Footer Senior Team Senior Team Premium Member

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    Had to do that exact thing last weekend when we had a storm and blew out a unison controller, had to hot patch all the house lights to work by re-wiring the packs. A ton of fun...
     

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