[SML] 60Hz gear in a 50Hz World

[Jerry Durand]

That's about the long and short of the waveform.  From the
"intelligence" I've seen in dimmer designs, I bet the show on it. 

Suggestion:  Borrow a generator from someone that won't get TOO pissed
if you mess with the throttle and turn it down to 50Hz, then you can
test your dimmers.

Don't forget to re-time the generator before returning it!

On 02/28/2018 03:17 PM, Mt. Angel Performing Arts Center via Stagecraft
wrote:
>
> The answer is 'probably', based on my experiments with building DMX
> controlled whizbangs. Jerry probably has much more info than I.
>
> IME a well-designed pack will determine the zero-crossing time of the
> power source and phase lock its internal clock so that zero-crossing
> interval is 256 magic units. Then the DMX sends a 0-255 number and
> (after maybe doing some cosine adjustment) the controller PWMs (pulse
> width modulates) the output when the two match.
>
> If the dimmer pack isn't quite so smart and is designed for 60HZ only
> then either you won't get full brightness at 100% or fully 'out' at 0%
> depending on how the controller logic works.
>
> Carla
>
> I saw a woman wearing a sweat shirt with "Guess" on it. So I said
> "Implants?" She hit me.

-- 
Jerry Durand, Durand Interstellar, Inc.
www.interstellar.com
tel: +1 408 356-3886
@DurandInterstel

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