Hi,
Currently I'm looking at PixHawk to autopilot a Techpod drone. I can't seem to find whether the pixhawk supports analog servos, which run on 50Hz. I'm asking this because a lot of FBL systems for helicopters have no analog servo support.
Does anybody know? I've downloaded the software but I can't really do anything with it (change servo frequency) unless the pixhawk is connected.
Thanks!
Replies
The APM:Plane firmware runs all servos at 50Hz. It should work with all servos.
Cheers, Tridge
Hi Andrew,
I have noticed that the servo movement is very "steppy" (for lack of a better word) Why is this?
My Camera gimbal servo is not running smooth but it looks like it is moving in small steps to get to its endpoints. I am using digital servos for the gimbal.
Thanks Andreas
Digital servos are kind of "steppy". I use analog servos on my gimbal for this reason.
The parameter RC_SPEED allows a range of 50Hz to 490Hz update rates.
You may access this parameter from the Full-Parameter-List section of the Config/Tuning tab in Mission Planner.
That’s the problem – the Airplane firmware does not have that parameter.
For multirotors that RC_SPEED parameter is only for ESC control and is not used on the servo channels.
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Works perfect with HXT 900 servos so it must be 50 Hz.
If someone is a good code reader It would be nice if they could figure that out and post the answer.
It would be a nice enhancement to be able to adjust servo frequency. Multi rotor firmware has that logic so they could just copy over the code.
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I would like to know the answer to this as well.
Meanwhile I have the pixhawk, and without changing the servo frequency (I wasn't able to find the menu) it didn't fry my $3 HK analog servos. So you can :)