Problem: She flies stable in STABILIZE mode but I do have to hand control altitude. Once switched into LOITER mode she bounces up and down as the throttle pulses (audibly so). It soon becomes unstable and crashes with a few seconds.
RC Not Found is because I had the transmitter off to do this post while grabbing information.
I plan on doing a fresh accelerometer calibration before the next test.
The autopilot was purchased new in April 2024.
This is a heavy lift quad meaning it has a high thrust to weight ratio (well built mechanically as well) and I suspect that might be part or all of the problem.
I have made many attempts to make this build stable, ANY HELP is welcome!
BIN file of the problem in action here.
Instability starts at 17:08:45 when it is put into LOITER mode and an attempt at stopping a crash was initiated with switching to STABILIZE mode at 17:08:48. Impact occurred at 17:08:48.5. A TFminiPlus infra red sensor was used so I trust the altitude readings are good.
Here is a pic of the battery voltage oscillating in time with motor thrust pulsation.
Here is the bootup stream:
9/17/2024 5:41:58 PM : PreArm: Hardware safety switch
9/17/2024 5:41:58 PM : PreArm: RC not found
9/17/2024 5:41:41 PM : Frame: QUAD/X
9/17/2024 5:41:41 PM : IMU2: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU1: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU0: fast sampling enabled 3.2kHz
9/17/2024 5:41:41 PM : RCOut: PWM:1-14
9/17/2024 5:41:41 PM : IOMCU: 420 1001 411FC231
9/17/2024 5:41:41 PM : CubeOrangePlus 0042002A 30325114 33383839
9/17/2024 5:41:41 PM : ChibiOS: 6a85082c
9/17/2024 5:41:41 PM : ArduCopter V4.5.6 (7ce11b41)
9/17/2024 5:41:41 PM : Frame: QUAD/X
9/17/2024 5:41:41 PM : IMU2: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU1: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU0: fast sampling enabled 3.2kHz
9/17/2024 5:41:41 PM : RCOut: PWM:1-14
9/17/2024 5:41:41 PM : IOMCU: 420 1001 411FC231
9/17/2024 5:41:41 PM : CubeOrangePlus 0042002A 30325114 33383839
9/17/2024 5:41:41 PM : ChibiOS: 6a85082c
9/17/2024 5:41:41 PM : ArduCopter V4.5.6 (7ce11b41)
9/17/2024 5:41:41 PM : Frame: QUAD/X
9/17/2024 5:41:41 PM : IMU2: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU1: fast, high-resolution sampling enabled 3.2k
9/17/2024 5:41:41 PM : IMU0: fast sampling enabled 3.2kHz
9/17/2024 5:41:41 PM : RCOut: PWM:1-14
9/17/2024 5:41:41 PM : IOMCU: 420 1001 411FC231
9/17/2024 5:41:41 PM : CubeOrangePlus 0042002A 30325114 33383839
9/17/2024 5:41:41 PM : ChibiOS: 6a85082c
9/17/2024 5:41:41 PM : ArduCopter V4.5.6 (7ce11b41)
