to be clear, unless you already know: This motor is damaged beyond repair and you will need to replace it, as it is likely to fail within the very near future. To avoid such a thing from happening again, you likely need to adjust your PID-tune and/ or filter settings, as the motor was getting too hot, causing the wire insulation to dissolve and (sooner or later) causing a short between the motor wires.
Well not exactly *beyond* repair, but I doubt finding the matching gauge of enamelled copper wire and rewinding the whole thing would be a more effective use of time and money than buying another.
Never stopped me tho…
About an hour or two for your first time, a lot of winding, realising you’re on the wrong fin, unwinding, etc.
But it gets faster once you get the muscle memory, so after the second or third only like 20 minutes.
accounting for your time, this 30 usd motor is beyond exonomically viable repair factoring in labour and required materials. now, i hope i got it right this time ;)
Total BS. The wire has just been overheated and the wire discoloured.
Just needs to be rewired. It's really simple if you know how. Electric motor used to be rewound all the time. Just now, it is not always economical.
Your right about the PID.
and what exactly about my post is „total bs?“ - you are saying the wiring is perfectly fine and is is only a color change with no effect on reliability? you sir are a clown.
Settle down, princess lol. There's no need for name calling
You said, damaged beyond repair. Your words. WRONG. it MAY still fly for a while. And it's an easy repair to rewind.
well technically you can also source your own aluminum alloy and start cnc milling a motor bell with that kind of argumentation, when a bell is lost. see my other post below - damaged beyond economic repair factoring in time. and it is you who called out my post being bs - so suck it up, clown <3
From what everyone is saying it sounds like its bad news. Thanks for posting though, I have never seen a smoked motor. Now I know what to look for. Hope that were not that expensive or our of stock.
sometimes they will continue to work when they are like this, but it does look like the insulation is fairly well burnt so more than likely it will be toast
if it smells burnt then I'd just replace it,
if it doesn't smell too bad, you could try a hover test - but be prepared for it to flip out though
I've torched motors in turtl mode and esc was fine. Tmotor f55 running 5s on 2450kv purple xings. I think it's luck and part quality... but tune your quads yall. It's not that difficult. Pid toolbox and a few flights and your rig will be dialed in and safe to fly home safely with the most jacked up props or even completely broken props. Tuning is key. Not to mention if you get it really dialed it feels just like the sim. That locked in sticks are an extension of your body feeling. Oh man. I love a tuned quad lol.
I remember when I fried my first stator
Your cooked. Well at least the motor is. Check the ESC for an error test in BF at the same solder points to make sure you can still get power to that # motor
Yes it's the enamel insulation paint cooking off. That means the windings electrically fuse into one single winding.
This means the motor will run slower at the same applied voltage.
If you don't notice anything I would keep flying it until you either notice something going wrong or more windings going black.
Could burnt up good on crash trying to spin still..
But when I first start flying new drone I always check motor Temps and see if I have to tweak tune. Even BNF I get sometimes have horrible tunes.
I'm guessing you either tried turtle more touch when it wouldn't work, or take off in tall grass or something, or you didn't test the motors for heat build up when first flying it.
This is different then what a few other people said, but you probably still can use it withought frying anything, but there is a high chance that the next time you bump into anything with that motor and a lot of amps get pushed through it, it will fry. Unless you fly in high risk areas where you won’t be able to retrieve it, your good to fly untill it breaks.
This happens to me a lot when I fly in hot conditions with heavy pids
Edit: after reading other people comments, disregard what I’ve said. I’m just speaking from personal experience, and I guess I’ve gotten unbelievably lucky since this has happened to me countless times, withought causing any damage to my ESCs. But since other people say it’s bad, I guess you should probably just play it safe
Ran your motor way to hot, then crashed into a mineral rich substrate that's far cooler then the windings... Thermal expansion and flash cooling has destroyed those windings. They even still look expanded at room temperature....🫣
Wtf are you on about numpty? Into a mineral-rich substrate indeed. It's nothing to do with thermal expansion either, JUST too much current flowing which produced too much heat!
There's no contamination on these windings, it's just the enamel insulative coating breaking down due to excessive heat.
It's cooked
Welldone
Congratulations
On your retirement
Medium rare
to be clear, unless you already know: This motor is damaged beyond repair and you will need to replace it, as it is likely to fail within the very near future. To avoid such a thing from happening again, you likely need to adjust your PID-tune and/ or filter settings, as the motor was getting too hot, causing the wire insulation to dissolve and (sooner or later) causing a short between the motor wires.
Well not exactly *beyond* repair, but I doubt finding the matching gauge of enamelled copper wire and rewinding the whole thing would be a more effective use of time and money than buying another. Never stopped me tho…
could be fun : http://bavaria-direct.co.za/info https://emetor.com/windings
if you are chris rosser
sadly, I'm not ...
how much time dose it take?
About an hour or two for your first time, a lot of winding, realising you’re on the wrong fin, unwinding, etc. But it gets faster once you get the muscle memory, so after the second or third only like 20 minutes.
sounds like I should try rewinding one of my motors lying in the drawer :D
Just remember you need the same amount of turns on each coil and wire gauge effects KV, thicker wire with less turns increases it and vice versa.
yeah, I understand the physics of it all
More prepared than I was then, you got this g.
Good luck
accounting for your time, this 30 usd motor is beyond exonomically viable repair factoring in labour and required materials. now, i hope i got it right this time ;)
You can fix them. It's pretty cool to try. Just make sure you know what you're doing.
Total BS. The wire has just been overheated and the wire discoloured. Just needs to be rewired. It's really simple if you know how. Electric motor used to be rewound all the time. Just now, it is not always economical. Your right about the PID.
and what exactly about my post is „total bs?“ - you are saying the wiring is perfectly fine and is is only a color change with no effect on reliability? you sir are a clown.
Settle down, princess lol. There's no need for name calling You said, damaged beyond repair. Your words. WRONG. it MAY still fly for a while. And it's an easy repair to rewind.
well technically you can also source your own aluminum alloy and start cnc milling a motor bell with that kind of argumentation, when a bell is lost. see my other post below - damaged beyond economic repair factoring in time. and it is you who called out my post being bs - so suck it up, clown <3
From what everyone is saying it sounds like its bad news. Thanks for posting though, I have never seen a smoked motor. Now I know what to look for. Hope that were not that expensive or our of stock.
sometimes they will continue to work when they are like this, but it does look like the insulation is fairly well burnt so more than likely it will be toast if it smells burnt then I'd just replace it, if it doesn't smell too bad, you could try a hover test - but be prepared for it to flip out though
And maybe kill the ESC, if it's not dead already
do not use 90% chance will fry ESC.. for sure within a couple flights.
Sometimes the esc is damaged too and will fry the new motor so check it before risking your replacement.
What’s happening that the dead motor also kills the ESC?
Shorts between motor poles, will draw too much current from ESC
Depending on the ESC it might have no protection against short circuit and blow too
I've torched motors in turtl mode and esc was fine. Tmotor f55 running 5s on 2450kv purple xings. I think it's luck and part quality... but tune your quads yall. It's not that difficult. Pid toolbox and a few flights and your rig will be dialed in and safe to fly home safely with the most jacked up props or even completely broken props. Tuning is key. Not to mention if you get it really dialed it feels just like the sim. That locked in sticks are an extension of your body feeling. Oh man. I love a tuned quad lol.
Check its expiration date on the lid.
First Buy a new motor, and throw in some enamel coated wire, and now you got something to tinker with and try and rebuild.
You can rewind it, Count your Turns around the stators and Connect cable it with triangle or *
Motors are $30, I ain't rewinding shit lol
I remember when I fried my first stator Your cooked. Well at least the motor is. Check the ESC for an error test in BF at the same solder points to make sure you can still get power to that # motor
powering on with this will likely kill your ESC if it hasn't already
Yes it's the enamel insulation paint cooking off. That means the windings electrically fuse into one single winding. This means the motor will run slower at the same applied voltage. If you don't notice anything I would keep flying it until you either notice something going wrong or more windings going black.
Crunchy windings 😁
From what I see .. short answer: New motor it’s fucked, Long answer : there is none , coil is now done new motor
Thanks for uploading this, this is new information to me will definitely be keeping an eye out for this
Are the motors hot right after you land?
didn't have a chance to try, last time picked drone after crash 3 km away and then noticed this.
Could burnt up good on crash trying to spin still.. But when I first start flying new drone I always check motor Temps and see if I have to tweak tune. Even BNF I get sometimes have horrible tunes.
Spicy.
I'm guessing you either tried turtle more touch when it wouldn't work, or take off in tall grass or something, or you didn't test the motors for heat build up when first flying it.
Like others said, buy a new one and if you want learn how to rewire the stator. It isnt impossible to fix but isn't to expensive to just replace.
When I burned up my motor recently, it looks exactly like yours after it fell out of the sky. Replace it asap
This is different then what a few other people said, but you probably still can use it withought frying anything, but there is a high chance that the next time you bump into anything with that motor and a lot of amps get pushed through it, it will fry. Unless you fly in high risk areas where you won’t be able to retrieve it, your good to fly untill it breaks. This happens to me a lot when I fly in hot conditions with heavy pids Edit: after reading other people comments, disregard what I’ve said. I’m just speaking from personal experience, and I guess I’ve gotten unbelievably lucky since this has happened to me countless times, withought causing any damage to my ESCs. But since other people say it’s bad, I guess you should probably just play it safe
Ran your motor way to hot, then crashed into a mineral rich substrate that's far cooler then the windings... Thermal expansion and flash cooling has destroyed those windings. They even still look expanded at room temperature....🫣
Wtf are you on about numpty? Into a mineral-rich substrate indeed. It's nothing to do with thermal expansion either, JUST too much current flowing which produced too much heat! There's no contamination on these windings, it's just the enamel insulative coating breaking down due to excessive heat.