Advice on diagnosing a propellor/motor problem - Resolved (calibration)

[buzzard]

Hi All

I'm seeking a little advice from everyone who might have an opinion cause I'm basically fairly new to quads and I'm not sure how to go about diagnosing this problem.

I have a toy drone (Kai Deng K70F) that I've been using to introduce myself to flight and get confidence with before upgrading. It took a minor tumble and flip onto it's back the other day and now, when I throttle to take off, one prop/motor in particular goes hell for leather. I mean it sounds like it's almost at the absolute maximum it would run at. Meanwhile the other ones seem to be working normally.

Obviously it's not flyable. The most I've done so far is change the propeller blade (no use) and also changed the motor itself which didn't help either.

Can anyone offer and words of advice?
Many thanks in advance!

 

[Jerry John]

I’ve had two kai deng 70s and both were junk, it was like they had minds of there own, did not fly well at all. The reason I got them was because the YouTube videos rated them so highly, they called them x8 killers? I don’t think so. Come to Little Rock and you can have em for parts....free

 

[Steven Campbell]

I have several toy drones, my most favorite is my JJRC H31, mainly because it's cheap and basically indestructible, perfect to learn on....

 

[SNSTRLefty]

Check the post, it could be bent, an issue I had with my first drone.

Could have gone out in the crash, which is what trashed the same first drone. Are the motors soldered or plug and play?

I went with the CX-30W because it was plug and play for the motors, so easily replaced or upgraded.

 

[buzzard]

Thanks to all of you who replied... I appreciate your thoughts and respect your opinions...
I have an update which is good news!

The problem is now RESOLVED

Here's how I fixed it in case anyone else comes along with the same problem:


When I removed the body cover and noticed there was a small red light illuminated on the board, I wanted to figure out if I could somehow re-calibrate the motors. There doesn't seem to be a way to access the board via USB (to use with Clean Flight or similar) but I eventually came across a Youtube video showing how to calibrate the drone. In the manual of the drone, it details this same procedure as a way to reset the headless mode's direction...

1. pull both left and right controller sticks to the bottom left position
2. hold for 2 seconds or until the TX and/or drone beep once.

Fixed! Boom. Back to improving my flying skills

 

[buzzard]

Thanks to all of you who replied... I appreciate your thoughts and respect your opinions...
...
1. pull both left and right controller sticks to the bottom left position
2. hold for 2 seconds or until the TX and/or drone beep once.
...

Forgot to mention that the red light also switched off after the calibration.

 

[buzzard]

I’ve had two kai deng 70s and both were junk, it was like they had minds of there own, did not fly well at all. The reason I got them was because the YouTube videos rated them so highly, they called them x8 killers? I don’t think so. Come to Little Rock and you can have em for parts....free

Hi Jerry, Generous offer thanks. I'm going to PM you about those parts!

 

[Spork]

The reason I got them was because the YouTube videos rated them so highly, they called them x8 killers? I don’t think so.

While it's great that people do reviews on YT, I've learned to be extra careful with which ones I bother watching. Way too many of them give great reviews to crap equipment due to receiving them for free or other reasons.

 

[Spork]

Fixed! Boom. Back to improving my flying skills

Great news and thanks for sharing for future folks with the problem.