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Old Aug 22, 2015, 10:06 AM
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APM 2.6 alt hold problem!

So today was the fist time I took my new h550 with apm 2.6 to an open field. Stabilize flies beautiful. The issue lies in alt hold. When I flip it on, alt hold remains pretty accurate, until I give it an elevator input. If I go foward, it drops in altitude very quickly until I let go of the stick, then it returns to where it was. And if I go backward it will gain altitude quickly and then when I let go it will sink back down to where I flipped the switch.
How can I fix this? Thanks!
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Last edited by vito2772; Aug 24, 2015 at 10:03 AM.
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Old Aug 23, 2015, 11:08 AM
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Old Aug 24, 2015, 10:03 AM
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Old Aug 24, 2015, 02:49 PM
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it is a very common and good known problem called vibration... check your logs and I bet your vibes are high.

there is also another issue with alt drop with fast forward flight in alt hold/pos hold , this is a current limitation of arducopter, there are "work arounds", but they are a bit complex and do not give reliable result.
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Old Aug 24, 2015, 07:25 PM
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Originally Posted by artemen View Post
it is a very common and good known problem called vibration... check your logs and I bet your vibes are high.

there is also another issue with alt drop with fast forward flight in alt hold/pos hold , this is a current limitation of arducopter, there are "work arounds", but they are a bit complex and do not give reliable result.
I have my apm mounted on a antivibration mount. My other apm never had this issue, is there a fix?
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Old Aug 25, 2015, 12:29 AM
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I assume you have already put foam over the altimeter on the board. Even in the shell, draft / propwash throws it off.
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