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Post by LSA Flyer on Mar 24, 2018 23:03:11 GMT
I did a 5 hour flight today and experienced several random occurrences where the auto pilot rolled maybe 5 to 10 degrees to the left and right while in the NAV mode. This does not seem to happen in heading mode. My GPS signal is strong. My Torque setting is 100% and Gain is 1.2. If I reduce the Torque on the servo, things get worse. Seems to me I might have a weak roll servo. What settings are others using and have you experienced "hunting" with the GPS course?
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Post by MarkGregor on Mar 25, 2018 4:54:37 GMT
I assume it worked fine previously? Should be no need to change settings. I suggest calling Garmin G3X support and see what they have to say. Please report back!
Mark
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Post by montanapilot on Mar 25, 2018 16:15:11 GMT
Steve - is it a new airplane? The reason for asking is that I had several autopilot issues with my new Astore (last July) and found that the factory had not done any setup or config at all. I had to have my avionics shop do it, although a less mechanically-challenged person could do it themselves. If you need them, I could try to dig up the settings and e-mail them to you.
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Post by LSA Flyer on Mar 25, 2018 19:33:34 GMT
Thanks for the response's. The "hunting" is not new. I'm the 2nd owner of this low time Astore so I can't say with certainty what delivery settings were. There are only a few roll servo settings and I was wondering what others have used with success. Reading the G3X advice, it would appear a "normal" torque setting would be mid-range, not 100%. If I reduce the roll torque down to 70 or 80% the wandering increases. So I'd be interested in what torque and gain setting other Astore owners use with success. If others are running much lower torque settings then I have an issue with either the servo or binding in the linkage. At that point I can take it up with Garmin or pursue a warrantee issue. I would think that all Astore's should have similar or identical settings since the servos and flight controls are identical.
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Post by montanapilot on Mar 25, 2018 20:32:43 GMT
On my airplane:
pitch servo max torque 75%
gain 1.50
roll servo max torque 75%
gain .9
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Post by LSA Flyer on Mar 25, 2018 21:57:22 GMT
Thanks! That is helpful. I'll try those settings and go from there. When the solution is at hand I'll update the post. That may take some time. It's an annoyance, not a game stopper. I know the AP is capable of rock solid tracking, so will figure it out in time.
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Post by montanapilot on Mar 25, 2018 22:23:47 GMT
Mine was completely unstable in pitch, with major excursions. Since most of my time is in Pitts Specials, it was kind of fun, but I bought an airplane, not a roller coaster. It's solid as it can be now.
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Post by MarkGregor on Mar 26, 2018 1:24:20 GMT
I can get you the latest factory settings if you want. Let me know.
Mark
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Post by LSA Flyer on Mar 26, 2018 1:45:15 GMT
Thanks Mark, that would be helpful to others as well. It's always best to start from a proven setup and make small adjustments one at a time.
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Post by LSA Flyer on Mar 28, 2018 3:13:43 GMT
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Post by MarkGregor on Mar 28, 2018 20:08:05 GMT
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Post by MarkGregor on Mar 28, 2018 20:08:45 GMT
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Post by MarkGregor on Mar 28, 2018 20:10:24 GMT
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Post by MarkGregor on Mar 28, 2018 20:12:41 GMT
Settings from the latest Astore from the factory.
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Post by Glenn on Mar 28, 2018 20:39:20 GMT
Settings from the latest Astore from the factory. Hi Mark, Interesting that those are very different from the settings my P2008 came with. But as they're different planes I guess it makes sense (control surfaces are different). Any chance you could post the factory settings for the P2008? (Cause mine might have been adjusted.) Glenn |
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