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Sorry, Cedric - you've been very patient tolerating the wide-ranging discussion on this thread but I'm sure you'll agree that it could ultimately be useful to all - I was taking advantage of an opportunity to squeeze some more info out of Denny ;)

I'd love to see a video of that initialisation sequence - is there any available on YouTube/Vimeo? The sensors are (I assume) on the inner (pitch) axis, so it's generating rapid oscillations (i.e. vibrations within the expected frequency range) in each actuator and measuring what gets through...

From what I've understood so far: - by their own admission, PH developed the RSGS using only Savox servos. - their cable harness supplies a "spoof" 1500us PWM @ 3.3V to the servo's regular PWM input - the RSGS itself mimics a potentiometer, supplying a variable voltage to the potentiometer...

Pictures will help ;)

http://www.multirotorforums.com/showthread.php?3304-Photohigher-skyline-rsgs&p=51633&viewfull=1#post51633

That last realisation has given me an idea. Somebody with an oscilloscope should be able to exam what's happening on the pot connection from the RSGS to the servo. Since the PWM input doesn't vary, the only possible source of the jitter is the voltage on the pot line. So what does this jittery...

Ok - thanks - so now I understand better about how the RSGS is working. It's sending a constant neutral signal to the servo's PWM input then tricking the servo into believing that it has moved away from that position and needs to get back there. Ingenious. But I also noted an apparent problem...

Can you be more specific about these "jitters"? Probably posting a video would be best.

Denny suggested that the Zenmuse may be measuring vibration but I don't see how it could be compensating for it. Vibration will, by definition, produce translational as well as rotational errors - the Zenmuse, clever as it is, can't do anything about the translation. Agree with you about the...

Well, the best thing I read in the Hoverfly threads is that Blue Yonder is doing a whole-day visit to Hoverfly (or by now already has) to help them sort some unspecified "issues". Good news - everyone should benefit, including all the owners of PH gimbals (regardless of controller) since I...

I've now read through most of the Hoverfly Gimbal threads and have seen no particular mention of the lag. The board seems to be using a DSP, so lag ought to be better than most other boards. Indeed, Hoverfly themselves are pointing out that the limitation is the mechanical side of things. I...

What is this nonsense about "full names"? Hi - my name is Jeremy Esland :)

Here: http://vimeo.com/46164486

Ferrite rings can solve EMI issues - but ideally the need to be selected for the precise frequency of EMI encountered. So just putting "a ferrite ring" on a particular wire run may reduce the EMI but probably not remove it. Twisting the wires together is usually pretty effective, probably more...

Do a screen-grab of your eCalc setup and post it - unfortunately the linking doesn't work. 71% throttle to hover sounds worrying - you should be aiming for 50%. Don't forget that you need headroom on throttle for the FC to control the craft - i.e. if your throttle is already at 71% to hover...

Makes a case for pilot certification, doesn't it? Not sure who was more stupid - the pilot for taking the gig without enough hours on the sticks, or the DOP for hiring that idiot without taking references ;) Why 6? I see this as a three-stage plan: 1. Design for redundancy 2. Design/build...

My guess at the moment (having never even seen one of these but going only by anecdotal evidence presented here and an instinct for diagnosis) is that it's multiple problems that are masking and complicating each other: - cross-axis "pollution" in the algorithm (the oddest problem since...

Oiling shielded or sealed bearings? One of my pet peeves! To save me from more typing, here's something I wrote on another forum: This is not the definitive reference on bearing maintenance, but it's the only one I can find online that is directly aimed at RC so I figured it may carry more...

KoolKiwiKat is proposing some interesting components and this is a fundamental decision that every heavy-lifter must make: "lightweight sports car" with potential fragility or "over-powered tank" withbullet proof performance. Lotus vs Mercedes, if you like. With any electrical/electronic system...

Naza I don't know - but it would certainly fly with OpenPilot (and many others). The CG point is obviously unaffected by the elongated front/back. But it will alter the moments of inertia so good flight characteristics will depend on an FC with full loop tuning and mixer table facilities. I...