MAVIC - "Unsafe to Land"

Cookedinlh · Nov 30, 2016

Just got me new best friend couple of days ago and been going through the various modes.
It's EVERYTHING I hoped to see and more . . . fantastic little bird, beautifully engineered and built, quiet, agile, a breeze to set up but . .

This morning (3rd flight) I activated "auto-land" and it came down nice and smoothly to about 3 feet and stopped. Controller beeped I think and it said something like " Unsafe to Land - Please take over manually" . . or words to that effect. . . but it was in the middle of a paved open parking lot with nothing around it but my car maybe 10 feet away. . . so I just pull down on the stick and it landed fine. . . but it was going nowhere until I took over. It just halted in a low hover and waited for me to do something.

Anyone else got any knowledge or experience with this?
Thanks

J-Dub · Nov 30, 2016

I'm still waiting for my bird, but it could be that on the initial take-off it didn't quite record an obvious Home Point, meaning that the underside cameras could not distinguish the actual zero-elevation-point, so it hovered when it got close. Maybe try taking off from some place that's not all gray, a grassy area, or a take-off mat with a big Target Bullseye on it? Just guessing.

Cookedinlh · Nov 30, 2016

J-Dub said:
I'm still waiting for my bird, but it could be that on the initial take-off it didn't quite record an obvious Home Point, meaning that the underside cameras could not distinguish the actual zero-elevation-point, so it hovered when it got close. Maybe try taking off from some place that's not all gray, a grassy area, or a take-off mat with a big Target Bullseye on it? Just guessing.

That could be why because I was asking it to land about 30-40 ft from where I took off but that should not have made a difference since I asked it to "Auto-Land" in a flat open space . . . not RTL

J-Dub · Nov 30, 2016

Oh, not RTHome....look up Auto-Land in the manual.

Techcop50 · Nov 30, 2016

Sounds like it may have thought it was over water...

Tony Perry · Nov 30, 2016

Is there any gunk on your bottom VPS camera lens?

J-Dub · Nov 30, 2016

Page 51 of the DJI MP Manual states that if the Quad detects an unsafe surface to land, it will hover and wait for Pilot to land it....

Kilrah · Nov 30, 2016

There's a setting for auto evaluating of the landing surface, you can turn that off.

Cookedinlh · Nov 30, 2016

J-Dub said:
Page 51 of the DJI MP Manual states that if the Quad detects an unsafe surface to land, it will hover and wait for Pilot to land it....

Yes that's the issue . . it was perfectly clear, flat and dry pavement

Cookedinlh · Nov 30, 2016

Kilrah said:
There's a setting for auto evaluating of the landing surface, you can turn that off.

Thanks

jamgabbi · Nov 30, 2016

Kilrah said:
There's a setting for auto evaluating of the landing surface, you can turn that off.

Where is that setting located in the menu ?

Kilrah · Nov 30, 2016

On the vision settings page.

jamgabbi · Nov 30, 2016

Kilrah said:
On the vision settings page.

I don't see it maybe I have to have the Mavic connected. I don't see any setting for auto evaluating the landing surface.
I'll connect the Mavic up
Thanks for your help

Hook · Nov 30, 2016

It's called enable vision positioning

Sent from my iPad using MavicPilots

jamgabbi · Nov 30, 2016

Hook said:
It's called enable vision positioning

Sent from my iPad using MavicPilots

Thanks

Chorusbluck · Dec 27, 2016

Cookedinlh said:
Just got me new best friend couple of days ago and been going through the various modes.
It's EVERYTHING I hoped to see and more . . . fantastic little bird, beautifully engineered and built, quiet, agile, a breeze to set up but . .

This morning (3rd flight) I activated "auto-land" and it came down nice and smoothly to about 3 feet and stopped. Controller beeped I think and it said something like " Unsafe to Land - Please take over manually" . . or words to that effect. . . but it was in the middle of a paved open parking lot with nothing around it but my car maybe 10 feet away. . . so I just pull down on the stick and it landed fine. . . but it was going nowhere until I took over. It just halted in a low hover and waited for me to do something.

Anyone else got any knowledge or experience with this?
Thanks

Have never had a problem with the auto land but since I have done the recent update it has started doing that as well. I have found that mine won't land on dark concrete/asphalts but will on grey or lighter. Not sure why.

Sent from my iPhone using MavicPilots

Steve Cam · Dec 27, 2016

Chorusbluck said:
Have never had a problem with the auto land but since I have done the recent update it has started doing that as well. I have found that mine won't land on dark concrete/asphalts but will on grey or lighter. Not sure why.

Sent from my iPhone using MavicPilots

Same here, only since the update, won't land on concrete, I figured it was because it was a little wet but I guess that's not it. I just landed it on my hand instead

Sent from my iPhone using MavicPilots

maveric · Dec 27, 2016

..in my case, it refused to land in on a slightly tall grass, which is where it took off.. not really an issue for me back then. btw, in most instances RTH to initial take-off point were within 5"..

leesmavic · Dec 28, 2016

jamgabbi said:
Thanks

Just read about VPS before flipping the switch because of that auto landing issue you've had. It does a bit more than that.

Cookedinlh · Dec 28, 2016

. . . and I'm not using the Mavic AUTO-LAUNCH for now either. I've see several reports of what appears to be a software glitch that can cause it to misbehave immediately . . can't find the link right now but it's on this board somewhere. . . My new P4P+ arrives today. Can't wait.. . . oops sorry, wrong board.

FOUND IT . . . this is disturbing since there seems to be no clear cause or resolution.
Mavic dropped to the ground after auto takeoff