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[color=#000000]A bit of advice to anybody that wants it. This took me a long time to figure out even with the help of a Futaba Engineer. I Have a Robbe / Futaba FC16 transmitter running PCM. I'm building a 1]
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Sorry posted too soon.
Finally after
Sorry posted too soon.
Finally after some calculation I came up with the solution.
Every servo gets a max pulse of 2ms. 8 servos to be supplied with a pulse so 16ms per cycle. The reciever then adds 4ms of nothing and starts with a new cycle. So every servo gets a pulse every 20ms. 50 times 20ms equals one second. A refresh rate of 50 pulses would seem the maximum possible refreshrate.
So how was it possible to get a refreshrate of 100Hz. Simple; send the pulse to 2 servo's at the same time. The microcontroller based x-mixer polls channel 1 and measures the pulselength. Then it polls channel 2 and does the same. However; normally the pulses follow each other and the mixer polls them directly after each other. Now however the pulses are 22ms apart in stead of 2ms. This results in a very low amount of servop pulses to the servo and a lot of problems.
I hope this helps others working on their x-rudder subs and maybe others. I can imagine people with a twin pro sub adding a mixer between the throttle and the rudders to make sharper turns.
EJK
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