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Hello everyone,,
When I try to take off my drone, I noticed two motors are moving slower than the other two (motors 1 and 3). What ends up happening is the drone rotates over on that side. All the motors spin in sync when using the Betaflight motor testing function, but they don't spin in sync using the remote. 

I've calibrated my ESC and accelerometer, and made sure my drone configuration is correct (+ orientation; however FC is rotated 90 degrees counter-clockwise). 

I flashed the lastest firmware (SPRACING F3 3.5.7 in Betaflight). 

I'm pretty sure I trimmed my remote correctly (all say 1500 in Betaflight). 

Also 100% sure the motors spin in the right direction (motors 1 and 4 clockwise. Motors 2 and 3 counter-clockwise)

My build is:
-SPRacing F3 flight controller
-Racerstar RS20Ax4 20A
-Flysky FS-i6

I'm just wondering if there's anything I haven't though of to test yet.

I had a bunch of theories after reading your first paragraph and you covered all of them by the end, so I'm stumped.

Could you post some blackbox logs? That would tell us where in the pipeline the issues are happening. And a config dump is always useful!

First off, have you configured Betaflight to use the DSHOT protocol? Those ESCs support DSHOT150 and DSHOT300 so if not, try using DSHOT300 and see if that solves your issue because the DSHOT protocol performs automatic ESC calibration.

The Racerstar RS20Ax4 20A ESCs support DSHOT300, so change the config in Betaflight Configurator to use that protocol for ESC communication and see if that solves your problem.

The DSHOT protocol performs automatic ESC calibration, unlike the other protocols which require manual calibration.

Regards, 9Apps APK Vidmate APK Cartoon HD

configure DSHOT as Lovelash suggests

You said you have the board rotates 90 degrees......  

I'm wondering now exactly what you mean by "motors don't spin in sync"

Do you mean the RPM's are not all the same in Betaflight? Or something ore drastic?

Often when you rotate a board 90 degrees you will also have to remap the motors or when you take off the quad will just jump up and flip over.......... I'm wondering if you've told us the motors aren't in sync based on just seeing something similar to this happening.......

I wanna say that that rotating the board like that requires a motor remapping 100% of the time...... but I don't know this for certain. I just know that whenever I've done this I had to remap my motors or the quad didn't fly. (BTW I've only done it once lololol.... that's why I'm not sure... it just seemed like something that wouldn't be different with any other configuration).

This thread is over a year old. OP is long gone.

(12-Nov-2020, 05:02 PM)voodoo614 Wrote: This thread is over a year old. OP is long gone.

LOL wtf?

If your drone makes it easy to access the connections from the on-board computer to the motors, check that the connections are not loose. If the connection is loose, take it completely off and then make sure there is not debri or dust inside the connectors, plug them back up and test it out

(17-Mar-2021, 12:17 PM)rareskyfive Wrote: If your drone makes it easy to access the connections from the on-board computer to the motors, check that the connections are not loose. If the connection is loose, take it completely off and then make sure there is not debri or dust inside the connectors, plug them back up and test it out

See post #8.