iPeaka Sk10A ESC's stuttering

[Bartman]

HI guys,

I got these ESC's my for FPV racer quad and I just tried a first flight in my basement but the motors were stuttering and bucking. They start up smoothly and appear to be responsive but by about 1/4 throttle they start to stutter.

The heli is running an OpenPilot CC3D board and I'm not completely sure that this is a problem with the ESC's but that would be my first guess based on how they behaved.

I'm going to start searching the interweb for answers but if anyone feels like chiming in I'd appreciate the help.

Thanks,
Bart

 

[SleepyC]

If its like the naze, you have to calibrate the esc's through the GUI.

 

[Bartman]

i've done that twice now and double checked my whole set up while I was in there....someone at the Openpilot forum just pointed out that the upper refresh rate can be set where i thought it was only 50 or 490 so i've got to try setting it to 400 to see if that clears it up but at this point it looks like two motors/esc's are fine and the other two are spastic.