Hi everyone,
I’m working on a VTOL project with a custom airframe printed from PA12CF. I’m having trouble getting my vertical lift ESCs (T-Motor Flame 60A 6–12S) to initialize properly. They emit a single “Beep… Beep… Beep…” sound every second and do not spin up the motors at all.
Here’s the setup:
Flight Controller: Pixhawk 6C
Power Module: Holybro PM07
Battery: Tattu 6S 22000mAh Li-Ion
Horizontal Motor: AT4120 with T-Motor FLAME 70A ESC
Horizontal Propeller: T-Motor FF15x8
Vertical Motors: T-Motor MN501S
Vertical ESCs: T-Motor FLAME 60A 6-12S
Vertical Props: T-Motor P16x5.4
I’ve already verified:
- PWM rail is powered externally with a 7.2V UBEC.
- Pixhawk is connected via PWM to each ESC (ports M1–M4).
- Servo outputs are set correctly in Mission Planner.
- MOT_PWM_MIN = 1100, MOT_PWM_MAX = 1940
- MOT_SPIN_ARM is set to 0.15
- All motors are properly connected with bullet connectors and confirmed with a motor tester (motors are OK).
Still, the vertical ESCs just beep slowly and do not initialize or spin. The horizontal motor + ESC setup works fine.
Any advice or insights on:
myvtol.param (21.9 KB)
- Does this pattern of slow beeping indicate lack of PWM signal or undervoltage?
- Is there a special signal timing or startup mode needed for Flame 60A with ArduPilot?
- Should I use DShot or PWM in this setup?
Thanks a lot in advance! I’d really appreciate any help to get this sorted.
3 posts - 2 participants