Replies to This Discussion

Permalink Reply by Alain Dufresne on September 18, 2020 at 2:32pm

I am not familiar with the D180 since I have and HDX. What kind of connection do you have on the ailerons? A arm/link on the yoke OR a cabestan pulley with wire cables? Can you share a picture of the mechanical installation. Can you adjust the Gain on your AP like we can do on the HDX? On mine I raised the gain by 10% until good and its not chasing anymore. 

Here is a picture of how mine is installed. (On a CH650B) I used the Arm/Link setup. 

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Permalink Reply by David Krakowsky on September 18, 2020 at 3:08pm

Hi Alain
Y Th hanks for the response
I have the same me arrangement as you do
On the mechanical connection
I have the gain/sensitivity on the max
Been trying to figure it out for about a year now.
Dave

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Permalink Reply by christopher fryatt on September 18, 2020 at 4:39pm

i ended up installing a extra doubler under the aircraft to stop the servo from flexing the sheetmetal, drilled a hole on lowest point of aileron horn, settings used in dynon install guide have worked out nicely for me, the power of the servo really flexes the skin without a stable mounting

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Permalink Reply by David Krakowsky on September 18, 2020 at 7:38pm

Thanks Chris
I did that too
That’s why I’m reaching out, tried pretty much everything. I am wondering if it could be a problem in the D180
I even tried a newer GPS
Went from a 496 to a 560 Garmin
No change

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Permalink Reply by christopher fryatt on September 19, 2020 at 5:23am

Have you checked the accuracy of the Dynon mag compass? Maybe time to redo the alignment, latest Dynon software? Just some more ideas

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Permalink Reply by David Krakowsky on September 20, 2020 at 9:40am

Hi Chris
Appreciate the suggestions
Compass is calibrated
How many degrees does your plane deviate when in a heading or track?
Dave

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Permalink Reply by christopher fryatt on September 20, 2020 at 12:55pm

I check next flight, been hand flying mostly. The nav and heading are great some wallowing on track mode. I trim aileron and elevator for hands off before engaging AP. Dynon recommended setting is bank angle rather than roll rate from what I recall

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Permalink Reply by Gary Ray on September 20, 2020 at 5:32pm

My setup is similar on my 601XL-B.  D10-A, two axis Dynon AP, SV-32 servo to ailerons.  In calm air it works pretty well however, if there is turbulence it seems to get confused and apply incorrect output to cause wandering.  I have checked everything, re-calibrated the compass.  Usually a constant 10 degree variance before attempting to correct.  Occasionally

much more.  It is similar in both track and heading mode.  I have no solution yet so I am interested in the solution.

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Permalink Reply by David Krakowsky on September 20, 2020 at 5:41pm

Thanks for your input Gary, did you ever check your shear screw on the servo?
Hopefully we can get it figured out.
Dave

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Permalink Reply by christopher fryatt on September 20, 2020 at 6:11pm

Sv-42 on roll , 32 on pitch lube the roll tube frequently for ease of movement 

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