so ive been fighting this for like two weeks now and its driving me insane. i have a Ronin-S mounted on my setup and every time i go through the full calibration sequence in the app, it holds fine for maybe 5-10 minutes of flight and then the horizon just slowly starts to tilt. like not dramatically but enough that i notice it in the footage later when im reviewing on a bigger screen.

ive tried recalibrating multiple times, different locations, away from metal structures, all that stuff. balanced the camera as carefully as i can. the weird thing is it only seems to do it when im doing longer sweeping movements, if im just hovering it looks fine. im starting to wonder if its a motor issue or if i have the payload balanced wrong somehow. camera is a Sony a7III with the 24-70 GM lens which i know is on the heavier end but its within spec.

anyone run into this? is there some setting im missing or should i be looking at getting it serviced

yeah that sounds like a motor tuning issue more than a calibration thing honestly. the Ronin-S has that auto-tune feature but it doesnt always nail it especially with heavier lenses. try running a manual motor stiffness adjustment - go into the advanced settings and bump up the roll axis stiffness a bit. also check if the follow deadband is set too loose, that can cause exactly the kind of slow drift youre describing during movement. the a7III with the 24-70 GM is right at the edge of what that gimbal really likes so any little imbalance gets amplified.

this might be a dumb question but did you balance it with the lens extended if its a zoom? i learned the hard way that if you balance at one focal length and then shoot at another the weight distribution changes and the gimbal motors are constantly fighting it. probably not your issue if youre shooting prime equivalent but just something i noticed with my setup