Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0  25-Apr-2023, 12:48 AM (This post was last modified: 25-Apr-2023, 01:41 AM by LarK.) This is a follow up to my previous thread: https://intofpv.com/t-i-need-to-know-wha...#pid194641 I used betaflight to test each individual motors going from 0 to 100% in an instant. On the left side of my quad, the two motors seem find. They don't seem to have a problem. On the right side, they do a high pitch screech and become instantly hot. The one from the back right of my quad (Motor 1) literally sparked when I tested it. I've tried to change ESC settings and it doesn't seem to change anything. So I either have 2 bad motors, or a bad ESC. The front right motor (Motor 2) sounds like it has a higher pitch than all of the others. I used to fly with a 4S and 5S, and I didn't really notice anything strange until I put on my new 6S Battery(The specs are below). I'd like to hear your opinions on if the problem sounds like it could be the motors themselves or the ESC. If I change the motors and the issue isn't there, would it be possible that my ESC is bad in a way that it damages my motors? AFTER MORE TESTING, IT HAPPENS TO EVERY MOTOR, EVEN WITH A 5S BATTERY. It does this weird sound, then it smokes. What is going on here? For context, I pressed on the "end" and "home" keys to go full throttle and cut it off quickly. In this video, I went full throttle, then I cut it off, then I turned it on again pretty quickly. On the second time I turned it on, that's when it did the odd sound and it burned. My drone's specs: BTFL Configurator: 10.9.0
Firmware: BTFL 4.4.1 Battery: 6S 1400mah 22.2V 31.08W 150C ([b]Tattu R.Line V5)[/b] Motors: EMAX EcoII 2306 1900KV [b][b]4 in 1 ESC: F40 40A 3-6S DSHOT600[/b]
Flight Controller: MAMBA F405 MK2[/b] ![[-]](https://intofpv.com/images/collapse.png) • Posts: 6,112 Threads: 172 Likes Received: 2,286 in 1,833 posts Likes Given: 4,736 Joined: Feb 2019 Reputation: 100 25-Apr-2023, 12:56 AM (This post was last modified: 25-Apr-2023, 01:05 AM by hugnosed_bat.) sounds which arent mechanical might be an esc issue. both could be damaged, esc and motors at the same time. bad motors can damage an esc and a bad esc can damage aa motor  does the sparking motor still run? i would suggest to switch the motors and see if issue stays or wanders. "I used betaflight to test each individual motors going from 0 to 100% in an instant." why do you do that? i dont see a reason for that, i guess it doesnt mattet how they act in betaflight configurator about response, its not made for motor response testing. personal i just check the functionality, i adjust the motorsliders gently, nothing "instant" at all. • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 (25-Apr-2023, 12:56 AM)hugnosed_bat Wrote: sounds which arent mechanical might be an esc issue.
both could be damaged, esc and motors at the same time.
bad motors can damage an esc and a bad esc can damage aa motor
does the sparking motor still run?
i would suggest to switch the motors and see if issue stays or wanders. Thanks for the quick response! I updated the post, cause I came across another issue, and recorded it. What do you think? • Posts: 6,112 Threads: 172 Likes Received: 2,286 in 1,833 posts Likes Given: 4,736 Joined: Feb 2019 Reputation: 100 25-Apr-2023, 01:08 AM (This post was last modified: 25-Apr-2023, 01:11 AM by hugnosed_bat.) your motorwindings are melting, if the coating is fully burned they are gone... they might still have alot damage - i wouldnt fly them anymore.
i edited, wrote more about testing above. Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 25-Apr-2023, 01:10 AM (This post was last modified: 25-Apr-2023, 01:11 AM by LarK.) (25-Apr-2023, 12:56 AM)hugnosed_bat Wrote: sounds which arent mechanical might be an esc issue.
both could be damaged, esc and motors at the same time.
bad motors can damage an esc and a bad esc can damage aa motor
does the sparking motor still run?
i would suggest to switch the motors and see if issue stays or wanders.
"I used betaflight to test each individual motors going from 0 to 100% in an instant."
why do you do that? i dont see a reason for that, i guess it doesnt mattet how they act in betaflight configurator about response, its not made for motor response testing. personal i just check the functionality, i adjust the motorsliders gently, nothing "instant" at all. I saw a video on youtube on how to check for bad motors, and they were doing this. Is it normal for a motor to do what it did on my video if I do that? Could it be the ESC's doing? • Posts: 6,112 Threads: 172 Likes Received: 2,286 in 1,833 posts Likes Given: 4,736 Joined: Feb 2019 Reputation: 100 thats no testing method to go full throttle instantly in bfc. its absolutly usless, thats more a tip to kill motors, no information can be used - next than the happening damage very sad you got such a suggestion that sound was befor inflight? i would replace the esc and motors. i wouldnt throw away the esc, i would test it on old gear, on a testing quad. for the actual build, its more risk to loose more; the whole quad, more motors, all the rest from crashes... • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 (25-Apr-2023, 01:20 AM)hugnosed_bat Wrote: thats no testing method to go full throttle instantly in bfc. its absolutly usless, thats more a tip to kill motors, no information can be used - next than the happening damage
very sad you got such a suggestion
that sound was befor inflight? i would replace the esc and motors.
i wouldnt throw away the esc, i would test it on old gear, on a testing quad. for the actual build, its more risk to loose more; the whole quad, more motors, all the rest from crashes... Thanks, I have done it before and things like this didn't happen. Guess I was lucky before. I'll change those motors and the ESC. The reason I did this earlier was to test if the motor would do the same thing it did when I tried to spin while flying. Then, I wanted to do the same test in bfc other motors to see how they compare. Then it did the thing I showed in the video for another motor that didn't seem like it had any issues. I thought that testing the way I did was a way to test your motors for problems, I didn't know it could actually create problems. I pressed on the "end" and "home" keys to go full throttle and cut it off quickly. In the video, I went full throttle, then I cut it off, then I turned it on again pretty quickly. On the second time I turned it on, that's when it did the odd sound and it burned. • Posts: 6,112 Threads: 172 Likes Received: 2,286 in 1,833 posts Likes Given: 4,736 Joined: Feb 2019 Reputation: 100 pretty all tests without rotors attached are pointless, max rpms and kv can be tested somehow. the esc has a startuppower, it need to match the motors and rotors, in crashes or while flipover crash with blocked rotors, startuppower can heat the motor up, up tu melting coating and burned motors. i believe it is the startup power which ate the motors by fast changes without rotors attached. hopefully it will fly like an angle after installing a fresh esc and motors :-) tbs has a few nice quality blowout products, motors escs and rotors, maybe you can crab something nice for a decent price: https://www.team-blacksheep.com/products/product:5349 https://www.team-blacksheep.com/products...proiv_2_17 • Posts: 1,490 Threads: 92 Likes Received: 574 in 468 posts Likes Given: 0 Joined: Nov 2020 Reputation: 27 (25-Apr-2023, 01:20 AM)hugnosed_bat Wrote: thats no testing method to go full throttle instantly in bfc. its absolutly usless, thats more a tip to kill motors, no information can be used - next than the happening damage
very sad you got such a suggestion
that sound was befor inflight? i would replace the esc and motors.
i wouldnt throw away the esc, i would test it on old gear, on a testing quad. for the actual build, its more risk to loose more; the whole quad, more motors, all the rest from crashes... Smoke from motors is obviously enamel burning. Some enamel wire is triple coated, so like 50/50 chance its not enough to kill the motors. Be very carefull with them. If its just 1 motor, just replace it. The ESC is most likely damaged. I have always heard its bad to quickly ramp motors to 100%, especially without prop, but I dont fully understand mechanics of why. I have very cool trick for you - something I did long ago on Mamba F722 stacks when I first started building quads. Connect 6x NiMH AA battery box (approx 9V) instead of LIPO. I can almost guarantee it wont smoke the motors  Or at least it will take more than a few seconds, so you have chance to react. Alternatively, you could use a couple weak 18650 that only put out 2-3A. Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 (25-Apr-2023, 02:37 AM)hugnosed_bat Wrote: pretty all tests without rotors attached are pointless, max rpms and kv can be tested somehow.
the esc has a startuppower, it need to match the motors and rotors, in crashes or while flipover crash with blocked rotors, startuppower can heat the motor up, up tu melting coating and burned motors.
i believe it is the startup power which ate the motors by fast changes without rotors attached.
hopefully it will fly like an angle after installing a fresh esc and motors :-)
tbs has a few nice quality blowout products, motors escs and rotors, maybe you can crab something nice for a decent price:
https://www.team-blacksheep.com/products/product:5349
https://www.team-blacksheep.com/products...proiv_2_17 I just changed the ESC and the motors for new parts, the new parts being the same specs and the same brand. The problem seems to persist, because the same motor desynced and my drone spiraled until it hit the ground(Soft sand mixed with earth). My rates are set to turn at 900 degrees per second. Maybe that could be the cause? Or maybe the problem is having Bluejay as my ESC software? I'll need to diagnose and cause more crashes at this point. I appreciate all help, I'll keep you updated if anything works. • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 I reverted my firmware back to BLHeli_S, and the problems doesn't happen anymore when I flick the stick all the way to the front and left. Although, I did seem to have a problem with my same motor doing a desync and doing the spiral of death until it hits the ground when I let my drone fall off the sky and then blip the throttle to 100%. I'm kind of stress testing my quad, and I feel like stuff like this shouldn't happen. Any ideas? • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 (14-May-2023, 09:50 PM)LarK Wrote: I reverted my firmware back to BLHeli_S, and the problems doesn't happen anymore when I flick the stick all the way to the front and left. Although, I did seem to have a problem with my same motor doing a desync and doing the spiral of death until it hits the ground when I let my drone fall off the sky and then blip the throttle to 100%. I'm kind of stress testing my quad, and I feel like stuff like this shouldn't happen. Any ideas? I changed the placement of my receiver from under my stack to behind it. It caused my stack to be packed pretty tightly, squishing the soft mounts a bit. That was probably causing some vibrations to reach my flight controller and causing some issues. Now it's not as tight. I also changed some ESC settings, demag to high, and startup power to 0.125. By flying pretty fast, I have yet to experience a desync and the motors are not so hot anymore. • Posts: 21,258 Threads: 587 Likes Received: 8,966 in 6,634 posts Likes Given: 1,425 Joined: Jun 2018 Reputation: 788 With regards to the Bluejay firmware that was originally on your ESCs, if you were on version 0.17.x, 0.18.x, or 0.19.x then that may have contributed to your issues. See the post linked to below for more details... https://intofpv.com/t-psa-bluejay-possib...-x-v0-19-x • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 (15-May-2023, 12:40 AM)SnowLeopardFPV Wrote: With regards to the Bluejay firmware that was originally on your ESCs, if you were on version 0.17.x, 0.18.x, or 0.19.x then that may have contributed to your issues. See the post linked to below for more details...
https://intofpv.com/t-psa-bluejay-possib...-x-v0-19-x Thank you, sounds like what I need. I'll check it out! • Posts: 12 Threads: 2 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Apr 2023 Reputation: 0 22-Jun-2023, 09:03 PM (This post was last modified: 22-Jun-2023, 09:03 PM by LarK.) (15-May-2023, 07:33 PM)LarK Wrote: Thank you, sounds like what I need. I'll check it out! I still get desyncs as soon as I use blue jay, even the older version. It was a different motor, but it desynced as soon as I tried doing a flip. I guess Blue Jay isn't for my ESC and motors. Of course, with my luck, the drone fell in deep sand, with a ton of ferro magnetic powder in my brand new motors.. • |
