Hey guys,
I've seen the question asked several times over the years, about whether or not Arducopter could support high speed 760uS rudder servos. I remember trying to help somebody with it a couple years ago, and at that time it seemed not possible. But I've never had one of these servos to play with, so I never spent a lot of time on the issue.
Well, I recently got a Goblin 380 and accidentally bought a high speed rudder servo. So, I finally have looked at the situation, and found out that it's already possible to use these. I'm not sure if something changed to allow this, I looked but can't find anything.
Anyway, usage is quite simple. Simply set HS4_Min, HS4_Max and HS4_Trim to suitable values (600, 900 and 760 respectively to start with), and that's it. Adjust the endpoints and trim as necessary. But it basically "just works". I checked the PWM output on a scope and it's fine. There's really nothing else to do. This does not actually set the frequency to 333Hz, but I don't believe that really matters anyway, just marketing. I will look into that however. This BK DS-5005HV servo seems to run fine on 125Hz.
Rob
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