Would anyone be able to link me to any online resources on understanding rc channel mixing? I have seen some of the setups here in the forums but I am really interested in understanding how it actually works and what all the numbers mean. I have a Spektrum DX7s (extremely unhelpful manual) and I am specifically interested in mixing rudder and camera pan, and also adding flight modes (I have seen the link in the manual for 6 modes but for some reason I am only getting 5). Anyway, I just want to be able to understand how it all works. Thanks.
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No links, sorry, but if you want to use rudder as camera pan then it sounds like something opposite from mixing. Looks you want to provide rudder stick movement to two separate channels (one for rudder, one for camera pan) to be able to set min/max for them separately.
The idea of mixing is to move one stick/switch/potentiometer to control many channels at once.
Assume you have a fixed wing plane with propeller above wings. When increasing throttle you provide bigger force above the center of gravity of the plane so the plane tends to go down on bigger thrust. You could use mixing here: add a bit of elevator from throttle stick. This is mixing.
Simple setup is:
CH1 = 100% * elevator_stick
...
CH3 = 100% * throttle_stick
With mixing described above it would be:
CH1 = 100% * elevator_stick + 5% * throttle_stick
So actually throttle stick will change two channels: 1 and 3. This 5% is some arbitrary value, that one has to find.