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Post by whitey on Aug 15, 2019 6:58:23 GMT
My autopilot is not happy trying to hold altitude. It constantly wanders up and down 30-50 feet around the set altitude.
The pitch gain was set to 1.3 by the factory. I have reduced it to 1.1 but problem is only slightly improved
Torque is set to 80%. What settings are you all using and does it hold altitude nice and steady.
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Post by Ed Midgley on Aug 15, 2019 12:15:03 GMT
I’ve had pitch problems for awhile. Garmin just sent me some new settings to try.
Stand by and I’ll let you know how they work.
My pitch problems would get divergent up to 809fpm.
Ed
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Post by Ed Midgley on Aug 25, 2019 2:22:46 GMT
The new pitch trim settings didn’t work. Eleven minutes into my second flight I lost auto trim and manual trim. When I landed I turned off auto trim and got manual trim back.
I’ll get my recorded data to G3X Support on Monday and go from there.
Ed
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Post by whitey on Aug 25, 2019 7:33:34 GMT
Ed
I got to fly yesterday with your suggested pitch settings.
It held altitude very well. ,within plus or minus 20 feet for the hour or so of the flight. However as you suggested the gain at 2 is a bit aggressive for me and was a bit a like a bumpy road so I will will reduce it and retest
Sounds like you have another issue with yours
Look forward to hearing Garmin comments
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Post by montanapilot on Aug 25, 2019 17:57:34 GMT
Ed-
My autopilot is not trimming automatically. I receive "trim up" and "trim down" notices. How do I access and activate auto trim.
Thx.
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ash31mi
Junior Member
Posts: 58 
Home Airport: 18AZ Carefree Skyranch, AZ
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Post by ash31mi on Aug 26, 2019 12:59:19 GMT
Increasing pitch servo gain to 1.65 (previously 1.50), and vertical speed gain to 1.15 (previously 1.0), worked for me. I still get some altitude variations when flying through thermals, but nothing like the +/- 200ft I previously experienced. Astore 914.
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Post by Flocker on Aug 26, 2019 18:38:40 GMT
Ed- My autopilot is not trimming automatically. I receive "trim up" and "trim down" notices. How do I access and activate auto trim. Thx. Try looking in the configuration menu |
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Post by Ed Midgley on Aug 26, 2019 22:43:39 GMT
At this point I have no answers. I have been working with G3X support and they are trying different settings to rectify the problem.
If anyone is having problems let them know. At this point they think I’m the only one with this problem.
Ed
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DavidOber
Junior Member
Posts: 67
Home Airport: KTKI
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Post by DavidOber on Aug 31, 2019 18:43:31 GMT
Ed- My autopilot is not trimming automatically. I receive "trim up" and "trim down" notices. How do I access and activate auto trim. Thx. Mine shows these messages also....is it not supposed to? I just thought these were informational messages telling me what the AP was doing. Is this an indication that I need to enable "auto trim"? Thanks. David |
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Post by MarkGregor on Sept 1, 2019 0:00:49 GMT
Even if auto trim is enabled you will get an occasional "trim up" or "trim down" message.
If auto trim is NOT enabled you will be trimming for every speed or altitude change.
Mark
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DavidOber
Junior Member
Posts: 67
Home Airport: KTKI
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Post by DavidOber on Sept 1, 2019 2:09:09 GMT
Even if auto trim is enabled you will get an occasional "trim up" or "trim down" message. If auto trim is NOT enabled you will be trimming for every speed or altitude change. Mark Thanks Mark...Am I supposed to respond to these messages? I will try to find the auto trim setting in config. |
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Post by MarkGregor on Sept 1, 2019 15:51:04 GMT
David,
I’m 100% sure your plane was set to auto trim when it was delivered to you. Not sure how it could have changed but things happen.
My point is if it’s not set to auto trim you will be trimming anytime you change speeds and that an occasional trim up or down
Message is normal even if it’s set to auto trim.
No need to reply David but everyone is learning so more the more dialogue here the better😄
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Post by cole505 on Nov 24, 2019 21:04:38 GMT
Hi All,
Yes, having the same pitch issues plus and minus 200 feet feels like a roller coaster...... on my auto pilot ........ hope you guys come up with the answers ..... I am in contact with Garmin. Just starting the process........ look forward to reading your solutions ...
Ray & Lucy
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Post by montanapilot on Nov 24, 2019 22:31:38 GMT
I've asked my avionics tech about autotrim, and he says it's not available on my factory-installed G3X system. Maybe he's missing something or maybe it really isn't installed. I rarely get trim messages, and primarily when I level off at cruise altitude and after I've begun a descent. I just blip the trim switch and wait a few seconds to see if the message reappears, since If you hold the trim button down until the message disappears, you will have overtrimmed. The air needs to be extremely rough for me to see trim messages at cruise. I had the same problem with my autopilot when my airplane was delivered. In my case, neither the factory nor Tecnam US had set up my autopilot (and many other things as well). I had a couple of flights this summer that we way rough, and I had excursions, but they were minor. I fly an Astore, so I don't know if my settings would be appropriate for a P2008, but if you'd like, I'll run out to the airport in the next couple of days and take photos of my settings. It took many adjustments to get it right.
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Post by ChiMike on Nov 25, 2019 5:50:56 GMT
I don’t have any issue with holding altitude—+/- 10 to 20 feet if I hit head wind changes. However, one minor glitch--and I do not how to address it, is that if I'm in straight and level and hit the ' blue button' on the AP, if I do not engage the 'hdg' control, the plane will enter a 3-5 degree turn to the left and just fly a big circle. Engage HDG as a supplemental and it will fly straight on the course you set it to with the hdg input. Has anyone else had to deal with this?
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