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  #1  
Old 06-09-2022, 12:49 PM
Piper J3's Avatar
Piper J3 Piper J3 is online now
 
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Default How to Re-calibrate Autopilot Servo with Dynon HDX?

Iím helping a RV-12 friend that has dual Dynon HDX with Autopilot. He replaced the sheer screw in the roll servo and now needs to re-calibrate the servo. We canít find exact instructions for doing this with HDX. We found Dynon SkyView instructions, but they donít correlate to the HDX. We have a call into Dynon. Any help appreciated...
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 790

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
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  #2  
Old 06-09-2022, 12:57 PM
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pazmanyflyer pazmanyflyer is offline
 
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Quote:
Originally Posted by Piper J3 View Post
I’m helping a RV-12 friend that has dual Dynon HDX with Autopilot. He replaced the sheer screw in the roll servo and now needs to re-calibrate the servo. We can’t find exact instructions for doing this with HDX. We found Dynon SkyView instructions, but they don’t correlate to the HDX. We have a call into Dynon. Any help appreciated...
Procedure should be the same for the HDX.
https://www.google.com/search?client...gkPIPj-Ww2AM32

Also see Section 6.3 Servo Calibration Procedure in the manual.
https://www.google.com/url?sa=t&rct=...2DpASQwvanVqwT

Van's also provided this PRE-SET READ ME document to RV12ers. Maybe this will help too?
https://www.google.com/url?sa=t&rct=...FXfW8Igxgv-IL2
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Last edited by pazmanyflyer : 06-09-2022 at 01:04 PM.
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  #3  
Old 06-09-2022, 01:00 PM
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jcarne jcarne is offline
 
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Location: Worland, Wyoming
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Quote:
Originally Posted by Piper J3 View Post
I’m helping a RV-12 friend that has dual Dynon HDX with Autopilot. He replaced the sheer screw in the roll servo and now needs to re-calibrate the servo. We can’t find exact instructions for doing this with HDX. We found Dynon SkyView instructions, but they don’t correlate to the HDX. We have a call into Dynon. Any help appreciated...
Edit: sorry misread your post, my explanation below is for tuning not calibrating.

Long story short Dynon hasn't released an updated version in quite awhile. The "current" tuning guide does not have any guidance on many of the setting that were added in 16.0 updates. So, still go through the same tuning guide. If you mess with settings not in the tuning guide you are on your own to some degree.

Many of us have been asking for an updated tuning guide for awhile now. Post number 4 here is the best we have at this point on many of the settings.
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  #4  
Old 06-09-2022, 02:45 PM
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StephenC StephenC is offline
 
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Try

SETUP MENU > HARDWARE CALIBRATION > AP SERVO CALIBRATION > TEST
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  #5  
Old 06-09-2022, 04:59 PM
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Piper J3 Piper J3 is online now
 
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Thank you for steering us in right direction.... literally....
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 790

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
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