Today's Message Index:
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1. 07:12 AM - servo filter capacitor (user9253)
2. 07:41 PM - Re: servo filter capacitor (Robert L. Nuckolls, III)
3. 09:07 PM - Re: servo filter capacitor (user9253)
4. 09:48 PM - Re: Re: servo filter capacitor (Robert L. Nuckolls, III)
Message 1
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| Subject: | servo filter capacitor |
The plans call for a 2200fd capacitor to be connected to the positive power wire
at the autopilot servo. The servo is not electrically connected to the aircraft
frame at the servo. Instead it has a black negative power wire going back
to the instrument panel. Should the negative capacitor lead be connected to
aircraft ground at the servo or should it be connected to the black wire? Or
does not it matter?
Thanks, Joe
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Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=307464#307464
Message 2
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| Subject: | Re: servo filter capacitor |
At 09:09 AM 8/4/2010, you wrote:
>
>The plans call for a 2200fd capacitor to be
>connected to the positive power wire at the
>autopilot servo. The servo is not electrically
>connected to the aircraft frame at the
>servo. Instead it has a black negative power
>wire going back to the instrument panel. Should
>the negative capacitor lead be connected to
>aircraft ground at the servo or should it be
>connected to the black wire? Or does not it matter?
It may not matter. I'm skeptical of
any such device hung on the outside of
a product. I had to do it once . . .
a cabin vent blower speed controller
that generated so much noise that
we had to bolt a fat electrolytic
capacitor to the outside of the housing
(UGH!). That's a goof that follows me
around and chews on my buns every time
I work in forward avionics bay of the
King Air.
Does anyone put down a reason in writing
why this capacitor is necessary? Noise
from the actuator? System noises getting
into the actuator that upset its operation?
Understanding the antagonist/victim/coupling
combination that is presumably broken by
adding this capacitor is key to wiring
it for greatest effectiveness.
Who's autopilot are you talking about?
Bob . . .
Message 3
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| Subject: | Re: servo filter capacitor |
> Does anyone put down a reason in writing why this capacitor is necessary? Noise
from the actuator? System noises getting into the actuator that upset its operation?
No, there is no explanation. The capacitor came with the kit and is called a "filter"
and is to be installed at the servo.
> Who's autopilot are you talking about?
It is a Dynon servo connected to the FlightDEK-D180 and AP74.
Thanks for the reply,
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=307586#307586
Message 4
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| Subject: | Re: servo filter capacitor |
At 11:05 PM 8/4/2010, you wrote:
>
>
> > Does anyone put down a reason in writing why this capacitor is
> necessary? Noise from the actuator? System noises getting into the
> actuator that upset its operation?
>
>
>No, there is no explanation. The capacitor came with the kit and is
>called a "filter" and is to be installed at the servo.
Hmmmm . . . I would hope that their instructions
are specific as to where it grounds. Are these Dynon
FlightDEK or third party instructions? I think I
know a guy at Dynon I can ask about it.
Bob . . .
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