So here is a funny story of how I debugged an issue, which someone may find when they face it themselves:


My quad slowly rolled to one side, despite the stick being neutral. It pissed me off, so I landed.

I have a widget which shows me channel outputs on the LCD of my TX16S, so I immediately noticed that it's an issue with the controller. I also noticed that I can't get past 99%.

I thought the issue was that the sticks somehow lost calibration and calibrating them would be an easy fix. I did this over 10 times trying different methods with no luck.

So then I though maybe the gimbals are just bad. I went to "debug" section of "hardware" tab of the radio settings. There, I noticed that the sticks are producing correct analog values (0 idle, -100 to 100 at extremes).

So apparently the radio was outputting a different value than it was reading. I checked input/mixes/output tabs of "model" page, everything seemed fine there.

And then it hit me - I have these funny "trim" buttons on my radio. It turns out they affect the outputs. I just centered all of them and the quad flies straight now

The moral of the story is to disable/remap trim switches.

Haha, I did that once when I was carrying all my gear to the front door in a big heap. Heard a whole mess of beeping but thought nothing of it.

That said, I will be keeping my trim as I'm going to need it in the future.

I had that same damn problem 2 weeks ago. I spent a ridiculous amount of time troubleshooting and doing things like changing my channel endpoints before I finally realized my trim wasn’t centered.

Speaking of, thanks for reminding me that I still need to go back and remove the excess dead band I added while troubleshooting to try to correct it.