Hi Guys,
I got a reply from the DIYDrones post on the same issue. Its as below:
"I would check motor/ESC #1 for damage and function. From the log the autopilot throttle up motor #1 and throttled down #2, motors #3 and #4 mirrored eachother. This is consistent with motor #1 failing.
If no physical damage is seen (scorched wires, broken wires, bad smell) then what might have happened is a motor/ESC sync problem. Reducing PID values to "detune" the quadcopter can help keep the motors from losing sync in some circumstances."
Would any of you happen to shed some more light on the motor/ESC sync problem? I have absolutely no knowledge about this issue and does this issue imply some kind of a compatibility issue of ESCs with Pixhawk or is it purely between the ESCs and motor?(since it seems to me from the log that the PWM pulses were being sent out ok from the Pixhawk). Is there a way to figure out the ESC/motor sync problem from the logs? And finally how does reducing the PIDs help is improving the sync?