Garmin G3X (non-touch) with GSA28 AP Question

[Dragg]

Just flew home a 'new to me' RV8. Great build and very nice 8. After getting acquainted with it, I have been trying to understand the AP setup. All the AFCS tests work perfect, the pitch and roll trims are displayed on the PFD but each time I engage the AP, it seems to have a mind of its own. Just wondering if anyone has the 8 specifics on the AP setup. There are a few Autopilot setup pages; Manual Electric Trim, Roll Servo, Pitch Servo & Pitch Gain. Thought would ask what others have these settings at just as a comparison. Going to start the complete setup (from Garmin), when I get a chance.

[fl-mike]

I had to turn down the gains to stop it "hunting" in pitch. I could see the elevator jittering in the mirror.
I can get the settings I'm using now later (don't have them handy)

[mburch]

Garmin provides detailed instructions that show how to configure, test, and tune their autopilot. If you have any doubt whatsoever about whether this has been accomplished completely and correctly, I would start from the beginning: Appendix H, section H.4.5 in the current installation manual (revision AS).

[dmattmul]

Just FYI I had to tune my settings much lower than the Vans recommended parameter to keep it from "hunting". Even now I can feel an occasional oscillation that peaks my attention.

[fl-mike]

Here's where I am right now. Don't know if these are "optimum" values, but I just fiddled with the settings until it calmed down. Seems to do what I want without the "jitters" now.