ModalAI Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2

    Ask your questions right here!
    3
    29
    723
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Alex KushleyevA
      Alex Kushleyev ModalAI Team @Jetson Nano
      last edited by

      @Jetson-Nano , since you are probably using a custom motor and propeller you should:

      • first of all, update the ESC firmware to the latest
      • calibrate the ESC for the motor/propeller and upload params
      • update min and max rpm params in PX4 because they are used to scale the control output
      • set the correct motor mapping and direction in px4 params
      • i also recommend updating the baud rate to at least 921600 (or 1M). We are using 2Mbit for all latest ESC configs now. This reduces latency and ensures that you don't have ESC packet drops (depending on the update rate of your flight control loop)

      In order to perform the updates and tuning, you will need to use voxl-esc tools. Please see the following page for more info: https://docs.modalai.com/voxl-escs/faq/

      Alex

      Jetson NanoJ 1 Reply Last reply Reply Quote 0
      • Jetson NanoJ
        Jetson Nano @Alex Kushleyev
        last edited by

        @Alex-Kushleyev Thank you for the support. I will make the changes you have mentioned.

        Jetson NanoJ 1 Reply Last reply Reply Quote 0
        • Jetson NanoJ
          Jetson Nano @Jetson Nano
          last edited by Jetson Nano

          hey @Alex-Kushleyev
          I am facing the same issue again, the ESC is not initialising when connected through fc v2 , i have followed all the suggestions you mentioned earlier. the FC as well as VOXL 2 is powered through ESC.

          nsh> voxl_esc start
INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
nsh> voxl_esc status
INFO  [voxl_esc] not running
nsh> voxl_esc start
INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
nsh>
          Alex KushleyevA 1 Reply Last reply Reply Quote 0
          • Alex KushleyevA
            Alex Kushleyev ModalAI Team @Jetson Nano
            last edited by

            @Jetson-Nano ,

            The primary causes of ESC not being detected by the FC (aside from hardware / wiring issues) is using incorrect UART port or incorrect baud rate. So you should make sure the ESC is running the latest firmware, double check the params that you want to use on the ESC (for your motor / prop) and you can also set the ESC baud rate in the ESC params. You should set up your ESC (using voxl-esc tools) before plugging it into your FC, so that you know exactly what your ESC is set up to do and then you just need to match your PX4 params to what you set in the ESC (baud rate, rpm limits, and use correct UART port).

            Alex

            Jetson NanoJ 1 Reply Last reply Reply Quote 0
            • Jetson NanoJ
              Jetson Nano @Alex Kushleyev
              last edited by

              @Alex-Kushleyev Thank you for reverting, I didnt change anything with respect to the fc or ESC, the firmware is the same.
              could you help me with understanding why it was working earlier , it is not now.
              The firmware of the FC is voxl-fpv-dev version, and when i tried to build again it is giving error, and not building.
              I still dont know whether the issue is with respect to FC firmware or ESC

              Alex KushleyevA 1 Reply Last reply Reply Quote 0
              • Alex KushleyevA
                Alex Kushleyev ModalAI Team @Jetson Nano
                last edited by

                @Jetson-Nano , please confirm the ESC is working by using a usb to serial connection directly to the esc and voxl-esc Python tools on a Linux PC or VM.

                You can run simple commands to detect the esc and perform spin tests if needed, this is all documented.

                https://docs.modalai.com/voxl-escs/faq/

                If the esc is ok, then you will need to double check the FC v2 setup.

                Alex

                Jetson NanoJ 1 Reply Last reply Reply Quote 0
                • Jetson NanoJ
                  Jetson Nano @Alex Kushleyev
                  last edited by

                  Hey @Alex-Kushleyev , for the same setup I mentioned above my esc is not starting by default, while I run voxl_esc start in mavlink console, it starts and works.
                  what could be the reason for such behaviour. Please could you help me out

                  Alex KushleyevA 1 Reply Last reply Reply Quote 0
                  • Alex KushleyevA
                    Alex Kushleyev ModalAI Team @Jetson Nano
                    last edited by

                    @Jetson-Nano , this is likely related to the fact that the FC starts quicker than the ESC bootloader's 1s wait time. We discussed this before.

                    So if you are saying that delaying the start of voxl_esc driver in px4 on your FC solves the problem, then the issue is exactly that.

                    Please delay the start of the voxl_esc driver in your px4 start-up script, for example you can see it at the bottom of the script here : https://github.com/modalai/px4-firmware/blob/bugfix-fpv-rev0-airframe/boards/modalai/fc-v2/init/rc.board_sensors

                    if param greater VOXL_ESC_CONFIG 0
then
	usleep 1500000
	voxl_esc start
fi
                    Jetson NanoJ 1 Reply Last reply Reply Quote 0
                    • Jetson NanoJ
                      Jetson Nano @Alex Kushleyev
                      last edited by

                      @Alex-Kushleyev I have already tried it, It was working fine earlier. since past 2 days the behaviour has changed, I have verified everything else and nothing else could be a reason for such behaviour , I even played around with delay to verify it, still the same issue.
                      please excuse me for repeating the questions but is there any other reason that can cause this issue.

                      Alex KushleyevA 1 Reply Last reply Reply Quote 0
                      • Alex KushleyevA
                        Alex Kushleyev ModalAI Team @Jetson Nano
                        last edited by

                        @Jetson-Nano ,

                        Thank you for clarifying. Unfortunately, since I don't know what you changed between the working and non-working condition, it is hard to help. Also, since you are indicating that the ESC is responding if you manually start the esc driver, then the ESC itself should still be functional.

                        Please try to backtrack your changes until you have a working setup again.

                        Alex

                        Jetson NanoJ 1 Reply Last reply Reply Quote 0
                        • Jetson NanoJ
                          Jetson Nano @Alex Kushleyev
                          last edited by

                          @Alex-Kushleyev , I will backtrack the steps and try re-configuring the setup.

                          1 Reply Last reply Reply Quote 0
                          • First post
                            Last post
                          Powered by NodeBB | Contributors