I have some questions regarding the calibration of my 30A ESCs. Since I am developing my own code, I need to calibrate them completely manually by writing down the appropriate code. You can check out the code I have written below:
import sys import time import navio.pwm import navio.util navio.util.check_apm() PWM_OUTPUT = 13 SERVO_MIN = 0.90 #ms SERVO_MAX = 2.49 #ms SERVO_INITIAL = SERVO_MIN with navio.pwm.PWM(PWM_OUTPUT) as pwm: pwm.set_period(50) pwm.enable() user_input = input("Type 0 to enter calibration mode and send max throttle: ") user_input = int(user_input) if user_input == 0: print("Sending maximum throttle") for i in range(100): pwm.set_duty_cycle(SERVO_MAX) time.sleep(0.1) # print("Waiting just a little bit...") time.sleep(0.5) else: raise Exception("Wrong input. Abandoning everything") for i in range(100): pwm.set_duty_cycle(SERVO_MIN) time.sleep(0.1) print("ESC calibration completed!") time.sleep(1) for i in range(500): print("PWM Period: %.3f" % (SERVO_INITIAL)) pwm.set_duty_cycle(SERVO_INITIAL) SERVO_INITIAL = SERVO_INITIAL + 0.005 if SERVO_INITIAL > SERVO_MAX: SERVO_INITIAL = SERVO_MAX time.sleep(0.03) while True: pwm.set_duty_cycle(SERVO_MIN) time.sleep(0.03)
I am powering the Navio2 board, sending the maximum PWM signal, then I connect my ESC, send the minimum PWM signal and afterwards I perform a testing by spinning the motor with increasing speed. The motor spins as it should be and when I send the minimum PWM signal, I hear the 3 beeps indicating a 3 cells Li-Po battery (which is correct) and then the long beep indicating that the minimum pulse width has been set.
However, there are some issues that concern me. When I plug the battery to the ESC, while sending the maximum PWM signal, I don’t hear the musical tone that I think I should but instead there are single beep tones every 3 and a little bit seconds. Moreover, when I don’t send any PWM signal for more than 1 second (approximately) ESC starts beeping constantly but it remains calibrated. Same things happen when calibrating it with an Arduino board.
Looking forward for any replies. It would be really helpful and appreciated.