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mavic mini forward flying issue
2718 21 2020-1-24
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szgeri00
lvl.3
Flight distance : 279803 ft
Hungary
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Hi there!
Im new here, and new with dji drones. The mavic mini is my first dji product. I love it but having some issues. when i take off, it keeps hovering at 1,2m rock solid. but when i push the forward stick, it starts to rise. At a 150m distance(only with forward stick) it goes up to 18-20m. when i bring it back and lower it to 1,2m the altitude shows 5-8m in dji fly app. this is not very accurate, maybe the barometer sensor is bad?

Any ideas?
(imu calibrated perfectly, and compass is calibrated before flying)

Thanks!
2020-1-24
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lannes
Captain
Flight distance : 4465 ft
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Australia
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This is a strange one , have you tried calibrating the control sticks in DJI Fly
It's in the control menu under RC calibration

Are you using mode 2 , which is the standard control stick configuration ?
2020-1-24
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Paul_IA
Captain
Flight distance : 4732283 ft
United States
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Sounds like you're flying in Mode 1 vs Mode 2. In Mode 1, the "throttle" is on the right stick (that's the up/down control) and in Mode 2, the throttle is on the left stick.

2020-1-24
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Paul_IA
Captain
Flight distance : 4732283 ft
United States
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As for the altitude accuracy, make sure you are looking at the VPS readout, not the GPS readout. When you hover close to the ground, the bottom sensors come into play and the VPS readout is usually spot on. GPS however is +/- about 3' if I remember correctly. So use VPS for low altitude and GPS for higher altitudes.
2020-1-24
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Debugger
Second Officer
Flight distance : 2133491 ft
Greece
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Paul_IA Posted at 1-24 06:11
Sounds like you're flying in Mode 1 vs Mode 2. In Mode 1, the "throttle" is on the right stick (that's the up/down control) and in Mode 2, the throttle is on the left stick.

[view_image]

I agree with you but the strange is that he said "At a 150m distance(only with forward stick) it goes up to 18-20m".
If it was in Mode 1, the distance should be 0. Right?
2020-1-24
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Paul_IA
Captain
Flight distance : 4732283 ft
United States
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Debugger Posted at 1-24 06:19
I agree with you but the strange is that he said "At a 150m distance(only with forward stick) it goes up to 18-20m".
If it was in Mode 1, the distance should be 0. Right?

I'm not sure we're getting the full story. He may be using the other stick too and just not stating that in his post. Flight log would clear things up, but the only cases I've ever seen this happen (especially with a new pilot) is flying in Mode 1.

Hopefully he'll give us some insight shortly.
2020-1-24
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kokoraki
lvl.2
United Kingdom
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Debugger Posted at 1-24 06:19
I agree with you but the strange is that he said "At a 150m distance(only with forward stick) it goes up to 18-20m".
If it was in Mode 1, the distance should be 0. Right?

Exactly, it makes no sense that mode 1 is the problem, otherwise it would be going straight up in the air. Problem is that MM is climbing vertically 20m over a horizontal distance of 150m without throttle input.

Sounds like VPS is confused, constantly thinking that AC is slowly losing altitude and is adding throttle to compensate without user input.
2020-1-24
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szgeri00
lvl.3
Flight distance : 279803 ft
Hungary
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My control is set to:
Left stick: up-down, turn left-right,  right stick: forwad-backward- yaw left, right
2020-1-24
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DJI Paladin
Super Moderator
Flight distance : 318 ft

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Hi. I am sorry for the trouble this has caused. With regards to this concern. Can you please refresh the firmware of the said drone using the DJI Assistant 2 if issue still persists please provide a short video of the said issue. Please keep us posted for better assistance. Thank you.
2020-1-24
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fans3a75b453
lvl.3
Flight distance : 279803 ft
Hungary
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The drone is climbing on its own. Right stick forward, no throttle, just forward, and for 25-30 m it keeps the altitude but after that it is start to climb.
This afternoon i calibrated everything again, yet the drone still climbing(not that bad like before), there was absolutely no wind. When i yaw left/right it keeps the altitude perfectly.....
2020-1-24
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fans3a75b453
lvl.3
Flight distance : 279803 ft
Hungary
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Forgot to mention: firmwares are up to date
2020-1-24
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TDZHDTV
First Officer
Flight distance : 2068550 ft
United Kingdom
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Mines does exactly the same, very noticeable when flying into the wind
2020-1-24
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TDZHDTV
First Officer
Flight distance : 2068550 ft
United Kingdom
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Mine does exactly the same, very noticeable when flying into the wind
2020-1-24
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themich0r
lvl.4
Flight distance : 62526 ft
Germany
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Can you post flight records?
2020-1-24
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jonny007
Captain
Germany
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fans3a75b453 Posted at 1-24 09:06
Forgot to mention: firmwares are up to date

Did you also have problems with version 1.03 or did you have from the beginning 1.04 ?
2020-1-24
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djiuser_GDskCXu488Zu
lvl.1
Flight distance : 17490 ft
Italy
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Since yesterday I have the same issue +6/7m height going forward 150m
2020-1-27
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Ingo Sundowner
First Officer
Flight distance : 914012 ft
United Kingdom
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I haven't heard anything like that before, very strange
2020-1-27
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JJB*
Captain
Flight distance : 8823799 ft
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Netherlands
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Paul_IA Posted at 1-24 06:17
As for the altitude accuracy, make sure you are looking at the VPS readout, not the GPS readout. When you hover close to the ground, the bottom sensors come into play and the VPS readout is usually spot on. GPS however is +/- about 3' if I remember correctly. So use VPS for low altitude and GPS for higher altitudes.

Hi Paul,

GPS readout?  GPS is not used for Altitude in any way on DJI drones.
Height is measured by a baromeric sensor, at takeoff the height iss re-set to zero, as a reference height for the flight.

At low altitude and in VPS range the height is also measured by the bottom sensor, but not seen on a MM as MM shows only the barometric height.

cheers
JJB
2020-1-27
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InspektorGadjet
Captain
Flight distance : 439915 ft
Spain
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Flight logs could help to find out more.
2020-1-27
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Ice_2k
Captain
Flight distance : 1132575 ft
Romania
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Ingo Sundowner Posted at 1-27 01:18
I haven't heard anything like that before, very strange

I've actually seen this reported a couple times before, especially the part about the drone returning to the starting point and showing a different height than it was when it first started.
2020-1-27
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leeblynchgmail.com
lvl.2
United States
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Here is a small snapshot of my DJI Mini 2 flight yesterday from Airdata UAV website.  I am flying in Mode 2 and there was NO throttle input from the controller during this section of the flight.  On the websites HD Flight Player the throttle lever does not move. As you can see both Barometric Alt and Sonar Alt both increase as I fly.  This was a straight flight with only the pitch stick pushed full forward.  I also noticed this with my original mini as well.  Straight flight, no matter if flying into or with the wind, this happens.  

Flight time        Flight mode        GPS Sat        Baro. Alt. Sonar Alt. Speed                Home Dist Bat%
10m 13.3s        P-GPS                27                5.9ft          7.5ft          17.2mph        211.2ft            56%
10m 13.7s        P-GPS                27                6.2ft          7.5ft        17.0mph      221.3ft            56%
10m 14.1s        P-GPS                27                6.6ft          7.5ft        16.6mph      230.9ft            56%
10m 14.5s        P-GPS                26            7.2ft         7.9ft        16.6mph      240.7ft            56%
10m 14.9s        P-GPS                26            7.5ft         8.2ft        16.3mph      250.5ft            55%
10m 15.3s        P-GPS                27            7.9ft         8.5ft        16.3mph      260.0ft            55%
10m 15.7s        P-GPS                27            8.2ft         8.9ft        16.3mph      269.1ft            55%
10m 16.1s        P-GPS                27            8.2ft         9.5ft        16.1mph      278.6ft            55%
10m 16.5s        P-GPS                26            8.5ft         9.8ft        16.1mph      288.2ft            55%
10m 16.9s        P-GPS                27            8.5ft       10.2ft        16.3mph      297.6ft            55%
10m 17.3s        P-GPS                27            8.9ft       10.5ft        16.3mph      306.9ft            55%
10m 17.7s        P-GPS                26            9.2ft       10.8ft        16.3mph      316.6ft            55%
10m 18.1s        P-GPS                27            9.5ft       11.5ft        16.1mph      326.2ft            55%
10m 18.5s        P-GPS                27            9.8ft       11.8ft        16.3mph      335.6ft            55%
10m 18.9s        P-GPS                26          10.2ft       12.1ft        16.3mph      345.0ft            55%
2020-11-22
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JJB*
Captain
Flight distance : 8823799 ft
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Netherlands
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leeblynchgmail.com Posted at 11-22 12:05
Here is a small snapshot of my DJI Mini 2 flight yesterday from Airdata UAV website.  I am flying in Mode 2 and there was NO throttle input from the controller during this section of the flight.  On the websites HD Flight Player the throttle lever does not move. As you can see both Barometric Alt and Sonar Alt both increase as I fly.  This was a straight flight with only the pitch stick pushed full forward.  I also noticed this with my original mini as well.  Straight flight, no matter if flying into or with the wind, this happens.  

Flight time        Flight mode        GPS Sat        Baro. Alt. Sonar Alt. Speed                Home Dist Bat%

Hi,

Best is to upload your flightlog using > https://www.phantomhelp.com/LogViewer/Upload/

Post the upload link on here ; mayby start a new thread.

cheers
JJB
2020-11-22
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