What is OpenTX?
FrSky Taranis and Turnigy 9X and 9XR transmitters run firmware based on OpenTX / ER9X which are "open source" projects. This firmware is extremely feature-rich, continually evolving, and very distinct from traditional commercial firmware running on brands such as Futaba and Spektrum.
Control rates / "weights"
We recommend that you change the weights for all channels to "80".
Explanation:
On OpenTX transmitters, servo rates/ "weights" of "100% " corresponds to 120% on most other transmitters. So, instead of ranging from 1100 to 1900 microseconds, their channels range by default from 988 to 2012 microseconds.
One problem with this is that by default, Ruby looks for the throttle channel to dip below 1050 microseconds as an indication that the receiver has gone into "failsafe" mode. If the throttle channel is set to "100%" in OpenTX, then it will be down around 988 microseconds when in the off position. It's not possible to temporarily dip the value any lower.
Another problem with the extreme range is that for control linkages, the extreme 1000 - 2000 microsecond values get beyond the best useable angular range of the servo horn.
Tips / Resources
Sample OpenTX configuration ".eepe" file
Taranis
Be sure to get the powerful and convenient "Companion 9X" configuration software for your PC.
Turnigy 9XR
Be sure to get the powerful and convenient "Companion 9X" configuration software for your PC, along with a "9XR Programmer".
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