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Top speed issue in p mode
333 21 2020-12-23
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RK7dronzy
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I have this issue now with my m2p in p mode where as soon as i get to 30mph the drone stops and gives me a return sticks to centre then i can go again until i hit 30mph. This also happens when doing a RTH where it will stop several times on the way home. Do not get the problem in S mode. It does it at any height. I have reinstalled firmware and software. Any ideas.?
2020-12-23
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Cavu Films
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Have you tried downgrading the firmware to the previous version to see if the latest firmware is causing the issue.
2020-12-23
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gnirtS
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Sounds like the obstacle sensors causing a braking.
Disable the avoidance sensors and try it.  If that works, recalibrate them.

Its relatively common if theres a lot of glare from water, snow, low sun and so on.  
2020-12-23
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DAFlys
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If you have some spare props,  I'd change them and retest.
2020-12-23
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Labroides
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Your issue has nothing to do with firmware or propellers and everything to do with obstacle avoidance.
(Even if the moderator suggests it - why do they give such poor advice?)

Do some testing and you'll notice that it only happens when the drone is flying towards whatever is setting the OA off (commonly a low, bright sun).
Fly the drone in a different direction and it won't happen.
If OA is not needed, you can disable it and enjoy the extra speed.
2020-12-23
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DJI Stephen
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Hello there RK7dronzy. I am sorry for the trouble this has caused and thank you for reaching out. Can you please try to refresh the firmware of your DJI Mavic 2 Pro and try to calibrate the sensors of the said DJI drone to see is the issue will still persist? Thank you.
2020-12-23
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RK7dronzy
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gnirtS Posted at 12-23 08:54
Sounds like the obstacle sensors causing a braking.
Disable the avoidance sensors and try it.  If that works, recalibrate them.


Thanks thats what i was wondering as it does not do it in sports mode where the sensors are disabled.
2020-12-24
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RK7dronzy
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DJI Stephen Posted at 12-23 19:54
Hello there RK7dronzy. I am sorry for the trouble this has caused and thank you for reaching out. Can you please try to refresh the firmware of your DJI Mavic 2 Pro and try to calibrate the sensors of the said DJI drone to see is the issue will still persist? Thank you.

Thankyou Stephen i have reinstalled the software but recalibrating is not possible due to dji assistant not recognising the screen resolution on window 10 and if you input the res it still does not work. I assume that the front sensors must be the problem as there is not a problem in sports mode.
2020-12-24
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RK7dronzy
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Labroides Posted at 12-23 14:08
Your issue has nothing to do with firmware or propellers and everything to do with obstacle avoidance.
(Even if the moderator suggests it - why do they give such poor advice?)


Thanks but it seems to happen in any direction any time of day so it seems like an issue with the front sensors as it does not do it in sports mode.
2020-12-24
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RK7dronzy
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DAFlys Posted at 12-23 09:26
If you have some spare props,  I'd change them and retest.

Thanks but the props are newish only a few hours on them.
2020-12-24
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RK7dronzy
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Cavu Films Posted at 12-23 08:50
Have you tried downgrading the firmware to the previous version to see if the latest firmware is causing the issue.

Thanks but no i have not tried downgrading only reinstalling.
2020-12-24
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Labroides
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RK7dronzy Posted at 12-24 04:31
Thanks but it seems to happen in any direction any time of day so it seems like an issue with the front sensors as it does not do it in sports mode.

Then clean and recalibrate the OA sensors.
2020-12-24
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DAFlys
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RK7dronzy Posted at 12-24 04:32
Thanks but the props are newish only a few hours on them.

It doesn't take much for them to get slightly deformed,  Ive had a similar issue where the props got caught coming out of the bag and I got lots of attitude warning and motor over speed warning until I replaced them.
2020-12-24
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RK7dronzy
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DAFlys Posted at 12-24 05:36
It doesn't take much for them to get slightly deformed,  Ive had a similar issue where the props got caught coming out of the bag and I got lots of attitude warning and motor over speed warning until I replaced them.

Thanks, well that was interesting having swapped the newish props with old ones that have done over 80 hours and done a inconsistent firmware update i had no trouble maintaining 30mph so swapped props with newer ones and now mysteriously they can maintain 30mph. WTF. Pehaps i should have just given the drone a good talking to. Oh well thanks all for the input.
2020-12-24
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DAFlys
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RK7dronzy Posted at 12-24 07:48
Thanks, well that was interesting having swapped the newish props with old ones that have done over 80 hours and done a inconsistent firmware update i had no trouble maintaining 30mph so swapped props with newer ones and now mysteriously they can maintain 30mph. WTF. Pehaps i should have just given the drone a good talking to. Oh well thanks all for the input.

It only takes a little twist and the angle on the blades gets pushed off little.    If you've got80 hours on the old ones Id recommend you get some new ones soon.
2020-12-24
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gnirtS
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Still odds on it being obstacle sensors.
Flight/light conditions with new props are likely different from the old flight.
Correlation v Causation.
2020-12-24
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Labroides
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DAFlys Posted at 12-24 07:56
It only takes a little twist and the angle on the blades gets pushed off little.    If you've got80 hours on the old ones Id recommend you get some new ones soon.

The issue has nothing to do with props.
Props don't stop a drone in flight.
You are only distracting the OP with continuing to go on about props. as they are completely irrelevant to his issue.
2020-12-24
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DAFlys
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Labroides Posted at 12-24 17:15
The issue has nothing to do with props.
Props don't stop a drone in flight.
You are only distracting the OP with continuing to go on about props. as they are completely irrelevant to his issue.

But he put the old props back on and it fixed the issue.  Also I have had a similar issue and changing the props fixed it.  hmmmmm
2020-12-25
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Labroides
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DAFlys Posted at 12-25 03:17
But he put the old props back on and it fixed the issue.  Also I have had a similar issue and changing the props fixed it.  hmmmmm

His issue was obstacle avoidance and it sounds like yours was too if it was stopping the drone with a message to return sticks to the centre.
It was not due to the state of his props and it was just coincidence that it didn't occur on a flight after changing props.
2020-12-25
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DAFlys
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Labroides Posted at 12-25 05:19
His issue was obstacle avoidance and it sounds like yours was too if it was stopping the drone with a message to return sticks to the centre.
It was not due to the state of his props and it was just coincidence that it didn't occur on a flight after changing props.

Sadly in my case I swapped props back and forth and recreate the issue. I also on a number of occasions during testing got motor over speed warnings too.
2020-12-25
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Labroides
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DAFlys Posted at 12-25 07:51
Sadly in my case I swapped props back and forth and recreate the issue. I also on a number of occasions during testing got motor over speed warnings too.

Motor speed warnings are usually a prop issue.
But stopping a moving drone in its tracks and advising to return sticks to the centre is an obstacle avoidance issue.
That he doesn't get this happening in sport mode, confirms that its an OA issue too.

2020-12-25
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gnirtS
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Labroides Posted at 12-25 13:15
Motor speed warnings are usually a prop issue.always
But stopping a moving drone in its tracks and advising to return sticks to the centre is an obstacle avoidance issue.
That he doesn't get this happening in sport mode, confirms that its an OA issue too.

This exactly.

Which is why step 1 is disable OA and test.
Step 2 recalibrate OA.

Every single time i see it (and its common) its low sun angle, reflections of water, snow and so on.
2020-12-25
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