2 motors spinning up when armed

R

Redbeard

Member
Alright, so after basically taking my quad apart and rebuilding it after frying a vtx on my Gecko build, I'm now left with a new issue.
When I arm the quad, everything is fine til I give it some throttle. Once I give it throttle, motors 1 and 2 start spinning up faster. Everything runs good when powered through esc's in betaflight.
Can someone give me possible reasons for this or suggest some troubleshooting? I feel I'm so close to flying.
 
You may need to calibrate the ESCs.

With props off.

Battery disconnected.

Connect Quad with Betaflight, in motors tab hit safety box and pull motor slider all the way to the top.

Plug in battery.

Move motor slider to bottom, you should hear a confirmation tone.

Disconnect battery.

Should be good to go after that.
 
wafflejock said:
You may need to calibrate the ESCs.

With props off.

Battery disconnected.

Connect Quad with Betaflight, in motors tab hit safety box and pull motor slider all the way to the top.

Plug in battery.

Move motor slider to bottom, you should hear a confirmation tone.

Disconnect battery.

Should be good to go after that.
Click to expand...
My bad for not mentioning it's a 4 in 1 ESC. Can you calibrate a 4 in 1?
 
When I put the props on and fly it outside, it's fine at first. The longer I fly it though the more those right 2 motors start to speed up. When unplugging it and plugging it back in, it all starts over.
 
The process that WJ posted is for any ESCs, 4 in 1 or single. Never hurts to do this but seeing as you're running DShot, calibration isn't required. It's normal for motors to spin up on the bench, but the fact that it's doing it in the air and it's only 2 of the 4 motors makes me think it's a damaged flight controller (gyro) or something simple like accelerometer needs calibrating.
 
Yah if flying in angle mode and drifting would also guess accelerometer calibration or issue. Other thing I'd be curious about is if PIDs or settings were dumped and loaded into new firmware or if it's a clean setup from scratch (since know sometimes settings change between versions and something might have weird values in it now).
 
RENOV8R said:
The process that WJ posted is for any ESCs, 4 in 1 or single. Never hurts to do this but seeing as you're running DShot, calibration isn't required. It's normal for motors to spin up on the bench, but the fact that it's doing it in the air and it's only 2 of the 4 motors makes me think it's a damaged flight controller (gyro) or something simple like accelerometer needs calibrating.
Click to expand...
I'd be alright if it was a bad gyro if it meant I can fly today. I have a new FC sitting here from when I originally thought I needed one from a different problem. I did crash a couple time on concrete with a hard mounted stack back when I first flew it (once cause Rx antenna came loose, and another cause vtx fried). Accelerometer is calibrated.
Anything I can do or test to pinpoint it being the gryo?
 
I've got one flight controller that will drift in random directions when flying in angle or horizon mode. Acro mode is fine however so I don't mind it much lol. I'm guessing it's a gyro issue.
 
Dugdog47 said:
I've got one flight controller that will drift in random directions when flying in angle or horizon mode. Acro mode is fine however so I don't mind it much lol. I'm guessing it's a gyro issue.
Click to expand...
Was hoping it was a gyro issue, but I just put in new FC and nothings changed.
 
Also if you're online right now Joshua Bardwell is doing live Q&A might be able to give you some hints if you can give him enough detail in a quick chat. Generally people in the live chat can be helpful there as well.
 
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