Servo travel too short at 150% servo travel

[Skippydi]

When I look at the output of the servo travel at 125% (SBUS) and 150% (max), the 150% output is missing +/- 86μs.
This is clearly noticeable in the servo travel when you use this 150% .

Ethos 1.6.0
Receiver Tandem X20s

[mawzthefinn]

What receiver/receiver firmware?

[Skippydi]

Archer GR8 Firmware Version2.1.14

[philippe-warnotte]

It seems that a value above 125% is not SBUS compatible.

[bsongis]

Indeed it is not possible

[Skippydi]

That's true, but that's not the problem. The output of 150% is selectable and is required for the first application. And if the output shows 2268, that should also be output.

[bsongis]

The radio requests this value, but there is an element in the chain which doesn't allow it

[Skippydi]

It is only mentioned for SBUS not to go over 125%, which is perfectly fine. But for other applications it may be necessary to extend the range to 150%.

[wavebiceps]

For flaps in fast gliders I generally need between 130 to 150% to maximize breaking for landing on tight spots with smallest possible lever for max force. With OTX it was no problem to go up to 150. I don’t use SBUS. If this is not possible it is a lost opportunity for the rc glider community.
this is my first github contribution so please let me know if I broke any etiquette here. Thanks

[bsongis]

Do you have the same setup between OpenTX and Ethos? Because if you consider the OS it should work the same!

[wavebiceps]

Yes when programming the same glider under Ethos I noticed the flaps on 2 gliders (where I went over 125%) were missing some degrees in the end position compared to when I had it programmed in OTX. Same Offsets and same Mixer values. Those degrees make a difference in high wind / small patch landings. As Skippidy shows in his measurements above there is something missing

[bsongis]

Strange, I will check it