New motors cause CF to completely shut down

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cafeciaojoe
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Posts: 25
Joined: Mon Jun 18, 2018 2:37 am

New motors cause CF to completely shut down

Post by cafeciaojoe » Wed Dec 19, 2018 2:54 am

Hi,

Replaced the stock motors with these

https://newbeedrone.com/collections/mot ... hed-motors

and now the crazyflie completeley shuts down when i press "launch" and wont turn on again until I disconnect and reconnect the battery.

Any ideas on what is going on?

If I did buy the wrong motors, what should i know for next time?

https://imgur.com/a/jCZCuwd

tobias
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Posts: 1867
Joined: Mon Jan 28, 2013 7:17 pm
Location: Sweden

Re: New motors cause CF to completely shut down

Post by tobias » Thu Dec 20, 2018 9:52 am

What propellers are you using with those motors. The CF propellers are probably overloading the motors which draws so much current that the battery protection circuit kicks in.

Potential solutions:
  1. Replace with another battery that can handle higher currents (higher C rating)
  2. Change to "smaller" propellers that does not load the motors as much

cafeciaojoe
Beginner
Posts: 25
Joined: Mon Jun 18, 2018 2:37 am

Re: New motors cause CF to completely shut down

Post by cafeciaojoe » Fri Dec 21, 2018 5:58 am

Hi Tobias,

Thanks for the reply, additional information here.
-- The props barely get up to any significant speed before it cuts out, (with flow deck 1.0)
-- I can fly the drone with the silver motors with CF propellors which are (KV: 14,800) (with flow deck 1.0) (https://newbeedrone.com/products/bee-dy ... -motor-set)
-- I can run the unicorn motors WITHOUT the props (KV: 25,500) (with flow deck 1.0) (https://newbeedrone.com/products/nbd-un ... hed-motors)
-- I can run the unicorn motor motors with CF props (with LED ring deck 1.0) BUT it cannot take off... motors run at a weird half speed.

Does this help at all?

I will order a higher C battery, how high should the voltage be?

tobias
Bitcraze
Posts: 1867
Joined: Mon Jan 28, 2013 7:17 pm
Location: Sweden

Re: New motors cause CF to completely shut down

Post by tobias » Fri Dec 21, 2018 11:19 am

When you change motors you probably have to re-tune booth PID and Kalman filter to get it to fly well, when you get it to fly. This is a different topic.

For the battery it should be 1 cell and preferably >25C rating for your setup. Try e.g. the batteries in this post.

cafeciaojoe
Beginner
Posts: 25
Joined: Mon Jun 18, 2018 2:37 am

Re: New motors cause CF to completely shut down

Post by cafeciaojoe » Thu Jan 03, 2019 5:26 am

Thanks for the info!

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