Pulsing Sound From Mavic

robcio · Jun 18, 2017

Took my Mavic out for its first flight since updating to the latest version of firmware.

What i did notice when i started my Mavic that there appeared to be a pulsing sound which i had not noticed prior to the firmware update.

The mavic was also not as stable under hover than what it was previously.

I checked the props and all seemed ok.

Has anyone else experienced this?

Cheers

Former Member · Jun 18, 2017

Can you do a youtube of the pulsing sound and post it up here?

Also, check out this thread:

Sonar making clocking sound

robcio · Jun 18, 2017

Thunderdrones said:
Can you do a youtube of the pulsing sound and post it up here?

Also, check out this thread:

Sonar making clocking sound

See video. You can slightly hear the sound

Former Member · Jun 18, 2017

Normal. The sound is coming from your downward sensors. You can put your finger over one and the clicking will stop. Dont try this with props spinning.

Check out this video. Is this the sound you're hearing?

robcio · Jun 18, 2017

Thunderdrones said:
Normal. The sound is coming from your downward sensors. You can put your finger over one and the clicking will stop. Dont try this with props spinning.

Check out this video. Is this the sound you're hearing?

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I dont think that is the sound as i only noticed the sound recently with the props spinning, also the hovering of the drone is not as good as it was previously.Coincidence?

Ill take another look when i get a spare movement and see if it is indeed the sensors.

Thanks for the advice.

Jeff7577 · Jun 18, 2017

Is there something wrong with one of your props? Do the motors spin freely without noise? I don't think that is the sensors...it sounds like a helicopter.

robcio · Jun 18, 2017

Jeff7577 said:
Is there something wrong with one of your props? Do the motors spin freely without noise? I don't think that is the sensors...it sounds like a helicopter.

Jeff, i did take off the props to check for damage and they visually appeared fine. I also ran the motors without the props and this appeared fine also.

I will check the props again and install new ones too see if this is the cause of the problem.

Jeff7577 · Jun 18, 2017

Did it make that noise without props on? There is no way I could hear my sensors while the motors are running.

geigy · Jun 19, 2017

I've never heard this kind of noise from mine. Strange.

robcio · Jun 19, 2017

geigy said:
I've never heard this kind of noise from mine. Strange.

I had not heard this sound until yesterday.
The drone had only been stored in its bag prior.

jeff, The drone did not make this sound without the props on which makes me think this maybe the cause??
Ill install new props and see if this makes a difference.

Ciawz · Jun 19, 2017

Thunderdrones said:
Normal. The sound is coming from your downward sensors. You can put your finger over one and the clicking will stop. Dont try this with props spinning.

Check out this video. Is this the sound you're hearing?

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Aha!!! Thank you!!! This is the sound i have been wondering for some time now
I thought it was an electric circuit flicker or some kind

Former Member · Jun 19, 2017

Ciawz said:
Aha!!! Thank you!!! This is the sound i have been wondering for some time now
I thought it was an electric circuit flicker or some kind

It does sound like an electrical circuit flicker or "arc." Good to know it's normal.

stephengsy · Jun 19, 2017

Possibly IMU needs calibrating. Maybe it’s trying to level itself causing a motor to spin differently. Looking at video looks like speed on front right is slightly slower.

robcio · Jun 19, 2017

stephengsy said:
Possibly IMU needs calibrating. Maybe it’s trying to level itself causing a motor to spin differently. Looking at video looks like speed on front right is slightly slower.

Thanks for the tip, I haven't yet had a chance to look into this further but ill give this a go this afternoon.

robcio · Jun 20, 2017

I tried an IMU cal and also new props and this sound still appears.

The motors all seem fine as well.

Cant think what else it would be

MavicPro · Jul 19, 2017

I also have this sound. Have you figured out what it might be?

robcio · Jul 19, 2017

MavicPro said:
I also have this sound. Have you figured out what it might be?

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Not yet, I check the props done some calibrations and same issue.

I have not been able to fly the past couple weeks so will have another look shortly.