I am having difficulties with ESC calibration on my 3DR quad. The calibration seems to go okay, with all motors starting in unison and accelerating proportional to throttle settings.
The trouble begins when I cycle the power on the APM2 board, the calibration seems to be "forgotten" and the motors spool up to about 75% of total power with only a slight advance on the throttle.
I am running the 30 amp jDrones ESC's with the 880 kv motors, and have double and triple-checked all the leads and connections. All trims on my radio are zeroed out, and the throttle curve is disabled.
I just don't know what else to try, and was hoping someone would have some good advice.
have you done them one at a time by hooking them to the reciever or the auto cal doing all 4 at one time.
might have a bad esc or more. might need to do the reflash.
can you output the parameter list?
Thanks for all your suggestions!
I made a third attempt at calibrating manually, and this time I have finally had success, but there is still an issue - the ESC's are disarming spontaneously. The speed problem appears to have been rectified.
Andrew, the channel 3 input responded as it should, moving exactly in tandem with the control inputs.
I have uploaded a copy of my parameters, hopefully it might shed some light on things.
After battling with calibration for a while, I started getting this weird cutoff on my ESCs. Turns out all the testing had drained the battery and the ESCs were detecting and responding to a low-voltage cutoff setting.
Check you haven't drained the battery - just on the odd chance that is part of the problem.