One motor shutting down shortly after startup.... Why?

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dma251

Member
I assembled my Flamewheel last night and had a wonderful flight this morning with my Gopro attached. The DJI WKM kept it very stable and smooth. After a few flights I experienced a mishap. At about 30 feet over grass, it suddenly tumbled out of the sky. Subsequent flight this happened again.

Later, while trying to lift off, it started wanting to flop over as motors began shutting off while I was advancing the throttle. I am using charged batteries (2200mah 3s 25C). The battery protection is turned off on WKM assistant, and the AKE ESCs are set to brake off, lipo battery type, cutoff off, timing low, gov off.

Any ideas what to look at first?
 

Droider

Droider

Drone Enthusiast
Double check the joints on the failing motor. I had this ages ago on my Gaui. It was the core of a motor wire that had broken where the solder ended next to the bullet. the sheathing was intact and the motor would start but when I started to pull apm the motor died.

Dave
 

Gunter

Gunter

Draganflyer X4
Is it just one motor or all of them? I had a similar problem where my esc's were getting too hot and shutting down because they weren't man enough for the job.


Regards,

Gunter.
Sent from my iPhone using Tapatalk
 


GGoodrum

GGoodrum

Member
Just out of curiosity, was it motor number 1? I have had a similar problem with the number 1 motor/ESC shutting down on my XA hexa. I'm going to move things around, when I rebuild this, and see if the problem follows. My setup uses 30A Maytech ESCs and Hyperion 2213-22 motors, running on 4s, and nothing gets warm at all. I've checked all the connections, several times, and they all seem solid. I had one incident where it happened as soon as I lifted off, after arming, which caused it to flip over towards the front-right. I had a second incident on my last flight, where the same motor shut down, two minutes into the flight, causing a tilt over to the front-right again. When it got to 70 degrees, all the motors shutdown, and it dropped like a rock from about 50-60 feet.

Anyway, I want to find out if this is related to the M1 position, or the more likely case that I've got a flaky ESC.

-- Gary
 

S

Sebas600

Member
dma251 said:
I assembled my Flamewheel last night and had a wonderful flight this morning with my Gopro attached. The DJI WKM kept it very stable and smooth. After a few flights I experienced a mishap. At about 30 feet over grass, it suddenly tumbled out of the sky. Subsequent flight this happened again.

Later, while trying to lift off, it started wanting to flop over as motors began shutting off while I was advancing the throttle. I am using charged batteries (2200mah 3s 25C). The battery protection is turned off on WKM assistant, and the AKE ESCs are set to brake off, lipo battery type, cutoff off, timing low, gov off.

Any ideas what to look at first?
Click to expand...

ESC config needs to be:

NIxx battery type
cutoff soft
timing high (medium at least, temp of esc will rise)
gov off
use the WKM battery protection

good luck
 

S

Sebas600

Member
Gunter said:
Is it just one motor or all of them? I had a similar problem where my esc's were getting too hot and shutting down because they weren't man enough for the job.


Regards,

Gunter.
Sent from my iPhone using Tapatalk
Click to expand...

maybe some small heatsinks? Farnell.com cheap fast an loads of handy goods for the job
 

D

dma251

Member
I will make the esc setting changes, maybe the battery type and timing changes will help. I also have a couple spare esc's, so I will swap out and see if that changes.

Thanks for all the tips!
 

S

Sebas600

Member
dma251 said:
I will make the esc setting changes, maybe the battery type and timing changes will help. I also have a couple spare esc's, so I will swap out and see if that changes.

Thanks for all the tips!
Click to expand...

The battery change will stop the esc's from cutting off the power and your MR falling like a brick
the timing will help for a better more stabile flight. The higher the timing the better but hotter esc's
 

Gunter

Gunter

Draganflyer X4
Sebas600 said:
maybe some small heatsinks? Farnell.com cheap fast an loads of handy goods for the job
Click to expand...

I changed from 30a jdrone esc's to 40a hobbywing pentium and it's all working lovely now!


Regards,

Gunter.
Sent from my iPhone using Tapatalk
 

D

dma251

Member
I reprogrammed the ESCs, and everything is working great now. I think they were the culprit. I've had several flights since then and no further malfunctions. Now I just need to start chasing drift issues.
 

Brombo

Brombo

Just a point of view
°Yes, i had the same issue and i solved just with the Calibration of the ESC one by one with the procedure.
 

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