I am building a drone that works mostly fine with less weight but I suspect one motor/esc is under performing. I have been checking the bin files of my lasts flights and in RCout, C1 is Maxed out while the other motors are approximately between 50-80% of power.
Correct me if I’m wrong, I know my drone might be a bit heavy for the motors but it is inside specs, it should be able to fly right? (motors of mavic 3 and weight 1.3kg).
I already re-calibrated the ESC with dShoot300, PWM and even changed the motor but with the same results (I use a 4 in 1 ESC 60amp). What steps do you recommend to continue my troubleshooting?
You are wrong. This craft is way underpowered overweight. I don’t know what you mean by “inside spec” but the thrust:weight should be 2:1 or greater. Meaning the average motor output is ~1500µs or less at hover.
Looks like you launched this craft without even doing the Initial Tune Parameters.
Check the C of G is correct. Look for bad solder or other wiring issues to that motor. Verify the prop is good. Also check the other motors/props. One of them may be under performing in some way and this one is maxing to make up the difference. Very unlikely that any settings would cause one motor to be that far off the others.
There are lots of version of the Mavic 3, but even the Pro is under 1kg. At 1.3kg you’ve added +30% to the weight and load on the system. That’s significant.
This craft is not tuned at all, start tuning it with methodic configurator, it will guide you through all steps.
Higher output on one motor can be CoG, ESC settings, wrong motor with lower KV or prop with smaller pitch.
thankyou for commenting, I understand it is not 2:1 thrust to weight, but I have seen youtube videos of the mavic 3 carrying up to 1.5kg of total weight without descending, an this are the same motors. so it would be able to fly at 1.3kg (sluggish and slow but possible) and I have the feeling that the malfunction of one the C1 motos transaltes in overpowering the rest of the motors to try to compensate. Again this is a hypothesis I am not sure.
I disarmed the drone and saw that the ESC of motor1 was working but with no torque compared to the other 3. and the drone struggling to fly is the main reason I havent done initial tune parameters.
I changed the 4in1 esc an it seems to work, will keep you posted.
Thanyou for your comments, yes I have been checking, changing props/motors and the design has the cg very centered, it seems it is the 4 in 1 esc. I will change it and let you know. and yes its a bit heavier the it is supposed to be, I havent been able to lower the weight, but hopefully this will work, maybe inefficiently but working.
Yes I understand its not tuned yet, but I havent been able to tune it without solving this issue first. and thankyou for your keypoints, I didnt want to change motors as you mentioned but I already order some bigger ones (matrice 4t), but I want to see if I can fix this before they arrive.
Ah, Youtube videos. Say no more.
This would be a mistake and it’s not DJI it’s Arducopter. You will find out when you get thrust loss errors during attitude control demand and stability is lost. Improve the thrust:weight or you are asking for trouble.
I’m curious why the DJI motors? They are optimized for a proprietary ecosystem. DJI props, DJI ESCs, etc. For the cost, I’d expect you’d be able to get better performance elsewhere. But maybe I’m wrong on that.
well not exactly for the ESCs, but you are right on the propellers. I selected them for their quick attach and detach as well as that they can fold, I have tried different motors but its hard to find folding props.
