I'm new to the hobby and I've a diy drone that i'm working on, using the APM 2.6 on 3.2.1 Firmware.I've calibrated my ESCs,and all the manual calibrations that have to be done (radio,accelerometer,comapss,etc), and am able to arm my quad.
However, whenever i rev the throttle, i only get 3 motors spinning, and am not able to get all 4 motors spinning.Although the "dead" motor does not spin when i rev the throttle, when i increase the yaw and/or pitch on my transmitter, the "dead" motor starts spinning, however, there will be another motor that stops spinning, so that at any one time, i only have 3 motors spinning on my quad.Furthermore, when i pick up my quad (props off) in stabilize mode and tilt it manually, the "dead" motor starts spinning to correct the quad, as i assume it is meant to do.( There will be another motor that shuts down, with only a total of 3 motors spinning at any one time).
I've looked on google for people with only 3 motors spinning and only came across ESC calibration issues , where 3 motors slowly start up together while the 4 one does not. I do not think that this is my problem as i've calibrated my ESCs (all together) , and the 3 working motors spin immediately instead of slowling starting up 1 by 1. I'm not sure if the people with the esc calibration issues on google have the same issue as me where the "dead" motor is able to spin when they apply yaw and/or pitch as they do not make any mention of it.
I would appreciate any help rendered, opinions given to help me get my quad up into the air.
P.S I'm trying to get my logs up but can't seem to figure out how to do it, if someone could kindly direct me to a page with instructions, or tell me how to extract and upload my log giles, and how to analysis it, that would be great!.
EDIT: I uploaded the firmware using the mission planner's wizard, and did all the calibrations, with arming and takeoff attempt in the stabilize flight mode.
- APM 2.6 with external compass & GPS
- 2800maH Battery,
- 4 EMAX motors
- F450 frame
- Castle Creations 25A ESC Quad pack.
EDIT 2: Uploaded log files, and auto analysis results as follows :-
Log File C:/Program Files (x86)/Mission Planner/logs/QUADROTOR/1/2015-02-21 21-08-11.log
Size (kb) 1541.7314453125
No of lines 22051
Duration -1 day, 20:35:15
Firmware Version V3.2.1
Firmware Hash 36b405fb
Free Mem 0
Skipped Lines 0
Test: Autotune = UNKNOWN - No ATUN log data
Test: Balance/Twist = GOOD -
Test: Brownout = GOOD -
Test: Compass = GOOD - mag_field interference within limits (21.90%)
Test: Dupe Log Data = GOOD -
Test: Empty = FAIL - Empty log? Throttle never above 20%
Test: Event/Failsafe = GOOD -
Test: GPS = FAIL - Min satellites: 4, Max HDop: 9.82
Test: IMU Mismatch = NA -
Test: Parameters = GOOD -
Test: PM = GOOD -
Test: Pitch/Roll = GOOD -
Test: Thrust = GOOD -
Test: VCC = GOOD -