Hello, I recently purchased a used x9d and am having issues with the joystick input range.

All four channels are way off. This applies to any model that I choose or create from scratch.

What I mean by off is, when I look at the graph or analog input percentages, I reach 100 or max input registering well before the physical travel of the stick has reached its maximum. For example, when I throttle down, everything is normal. I slowly go down from mid to all way down with the stick, and it registers as such. However when I increase throttle, I push the stick only 15 percent of its travel, yet the input is showing that I'm at 100 percent. The same applies to yaw, pitch and roll.

I've tried to calibrate the inputs, but it reverts back to this messed up state after each calibration. I tried to search this problem a few different ways, but haven't turned up with anything helpful.

This effect is greatly evident in actual flight, as the smallest touch of the joysticks yields a ridiculous response from the copter. It's very difficult to control anything and makes flying nearly impossible.

If any more info is required to try and diagnose or help, please let me know. Apologies in advance if I've missed some glaring beginner information in spite of my searching for a similar problem.

Thanks for any help you all can provide.

When you say "it's showing that I'm at 100 percent", where do you see 100 percent? On the radio's screen? or in the flight controller firmware?
Also it might not be relevant, but I would recommend updating the TX firmware first just in case.
And remember to check if there is any strange existing Global functions, and settings in place... they could affect all new models you create.

This is on the transmitters screen. It does display the same on betaflight though as well I confirmed.

I will try to reflash as I hadn't done that yet since it was already up to date. Worth a try though, thank you.

So yea it does sounds like it’s an issue on your TX side, check global function and setting first see if you can find anything unusual before updating firmware