Motor Startup issue

Roy Orth · Jan 2, 2020

I have two EVOs and in the past couple of weeks both units started having intermittent problems at startup. Only two or three of the motors will start when activated and not the same motor each time making me think it is a software problem. I reboot the controller and drone and they generally start properly however not always. Has anyone else encountered this problem.

resq3129 · Jan 2, 2020

I had an issue the other day with my Evo, not exactly the same issue but similar. All motors started fine, I let it "idle for about 30 seconds as I was checking settings and took off, about 5 foot off the ground 2 rotors stopped spinning. (diagonally opposite from one another). Thank god I was taking off from a soft spot because it spun wildly and actually landed upright. I was shutting motors down as it landed. I flew a couple more flights cautiously that day with no other problems so far. I just did an update a few days before.

claudius62 · Jan 2, 2020

Firmware Beta ou normal ?

Roy Orth · Jan 2, 2020

I am using the regular, recently updated firmware.

claudius62 · Jan 2, 2020

The V.1.4. 9 ?

macoman · Jan 3, 2020

claudius62 said:
The V.1.4. 9 ?

The new firmware is 1.5.8

claudius62 · Jan 3, 2020

Yes but you have to know if the problems are under Firmware 1.4.9 or 1.5.8

macoman · Jan 3, 2020

claudius62 said:
Yes but you have to know if the problems are under Firmware 1.4.9 or 1.5.8

I need to test the aircraft in the field with the new firmware to see if there is any new issue.

Tufargon · Jan 3, 2020

If the problem was firmware, I imagine everyone would have it on that build.

Autotechspecialties · Feb 17, 2020

Having this issue too. Intermittently only 3 motors will start. Stop the motors, restart and the opposite motor will not start. Had this issue with not sure what firmware was on my evo at the time of purchase, but just updated to the 1.5 and still having the intermittent motor start issue.

Jagerbomb52 · Feb 17, 2020

Autotechspecialties said:
Having this issue too. Intermittently only 3 motors will start. Stop the motors, restart and the opposite motor will not start. Had this issue with not sure what firmware was on my evo at the time of purchase, but just updated to the 1.5 and still having the intermittent motor start issue.

That is more then a issue

If you still have warranty or even not I would talk to Autel tech about it. You do not want to do any flying with that until it gets resolved.

Autotechspecialties · Feb 18, 2020

Agustine said:
That is more then a issue
If you still have warranty or even not I would talk to Autel tech about it. You do not want to do any flying with that until it gets resolved.

Spoke to Autel, created a service request and sending it off tomorrow.Thanks for the advice, I’m going to miss her for awhile but beats the alternative. Falling out of the sky.

Autotechspecialties · Feb 29, 2020

Autel emailed me after diagnosing the quad and turns out the PCB board was faulty. Waiting on the repair to complete.

Paulf10 · Feb 29, 2020

Autotechspecialties said:
Autel emailed me after diagnosing the quad and turns out the PCB board was faulty. Waiting on the repair to complete.

Wow! How many flights did you have on it? I would think a PCB problem would show up right away and may even be a widespread problem.

Autotechspecialties · Feb 29, 2020

Maybe 10 flights. The start up issue has actually occurred from the very first flight. But it wasn’t happening as often at first, so didn’t think much of it.

Paulf10 said:
Wow! How many flights did you have on it? I would think a PCB problem would show up right away and may even be a widespread problem.

Ansia · May 14, 2020

Frank072381 said:
I just bought the Evo this past weekend. I powered it up and only 2 out of 3 motors started. (Left Front did not). I powered it off and rebooted everything. I powered up and only 2 out of 3 motors started. (Right Front did not). I powered everything off, packed up, and came home. I am curently running latest firmware. Do I want to return the Product? Is there a solution or known problem with this? Im afraid to fly now due to this. Any suggestions would be greatly appreciated. If it helps anyone i have shared the 2 flight logs: May 13th, 2020 09:08PM | General / Overview | Drone Flight Log from Explorer app, version on iOS | Total Mileage: 15 ft | United States | Airdata UAV

Welcome to the forums. Apparently this has started to become more and more common in the latest batches of Evos. My suggestion is to get your Evo replaced at the store. It appears the ESCs came DOA out of the factory.

Roy Orth · May 14, 2020

My department has (3) EVO's and recently (2) of the (3) units had the same issue. It was believed to be a software issue and the units were returned for service. They seem to be working fine now.

SDSteve · Feb 14, 2021

I have been having the same problem but it does not happen all the time ,when starting the motors one will not start it has not been the same motor it changes some times but when they do all start the drone flies perfectly ,so I do not have a clue what the problem is if any one has some advice it would be appreciated Steve San Diego

UasDriver · Feb 14, 2021

SDSteve said:
o I do not have a clue what the problem is

In my old life, I would reseat connectors, push down socketed chips, check for arcing/arc'd connectors

robertmarcos · Feb 24, 2021

I have the same problem with my Evo 1. The front left motor only starts about 30% of the time. But it'll eventually work and will keep running for the entire flight. This has been going on for a month now and it's getting worse. I plan to ship it back for repair because I also have a "spastic gimbal"