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

    esc 4 in i issue

    ESCs
    3
    14
    344
    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.
    • A
      aiden @modaltb
      last edited by

      @modaltb
      Accorinding @modaltb 's advice, I rebuilt the FW that named px4_fmu_v6c included modal_io driver.
      In Qgroundcontrol, now i can see modal_io_ouput manual.

      but there is an issue what cannot touch param's value.

      MODAL IO OUTPUT
      configure :(param not available)
      Bitrate : (Param not availabe)
      RPM Min : (Param not availabe)
      RPM Max : (Param not availabe)
      ESC 1 spin Direction : (Param not availabe)
      ESC 2 Spin Direction : (Param not availabe)
      ESC 3 Spin Direction : (Param not availabe)
      ESC 4 Spin Direction : (Param not availabe)

      can u tell me how to solve this issue?

      Alex KushleyevA 1 Reply Last reply Reply Quote 0
      • Alex KushleyevA
        Alex Kushleyev Dev Team @aiden
        last edited by

        @aiden , modal_io params are defined here : https://github.com/PX4/PX4-Autopilot/blob/main/src/drivers/actuators/modal_io/modal_io_params.c please make sure those are included in your PX4 build and you are using the correct parameter names.

        Alex

        1 Reply Last reply Reply Quote 0
        • A
          aiden
          last edited by

          @Alex-Kushleyev
          Thank you for your advice.

          Here is my last Question.

          I supplied power and put pwm in normanl esc(https://store.tmotor.com/goods-580-ALPHA+40A+6S.html), motor can spin.

          Is it possible to operate moter with voxl 4 in 1 esc like above way? (without uart function like normal esc )

          when i did that experiment, it didn't work.

          Alex KushleyevA 1 Reply Last reply Reply Quote 0
          • Alex KushleyevA
            Alex Kushleyev Dev Team @aiden
            last edited by

            @aiden , I am sorry but at this time we do not support direct PWM input to ModalAI ESC.

            A 1 Reply Last reply Reply Quote 0
            • A
              aiden @Alex Kushleyev
              last edited by

              @Alex-Kushleyev
              Here is last question.
              When using a script to update parameters and run the motor, the motor's response is not always consistent.

              it seems like script cannot set whole motor's params.
              because after update param first time, i saw situation what id 0,1,2 motor spun normally but id 3 motor was not.

              after update param file second time, situation was changed like id 2,3 were normal and id 0,1 were not.

              sometimes id 0,1,3 were normal.. and id 2 was not..

              can u give me any advise in this issue?

              p.s Already checked all motors weren't broken

              Alex KushleyevA 1 Reply Last reply Reply Quote 0
              • Alex KushleyevA
                Alex Kushleyev Dev Team @aiden
                last edited by

                @aiden , can you please clarify what you mean "spin normally"?

                You can use a command ./voxl-esc-verify-params.py , which is part of voxl-esc tools, to verify the parameters on all 4 ESCs. If one of the ESC channels has an issue with params, this tool should be able to tell you about an issue.

                Additionally, if you simply run ./voxl-esc-scan.py , if all four ESCs are found using the baud rate that is specified in your params, then all the params are OK.

                A 1 Reply Last reply Reply Quote 0
                • A
                  aiden @Alex Kushleyev
                  last edited by

                  @Alex-Kushleyev spin normally means motor spins well when using script "voxl-esc-spin.py".

                  Here is my experiment sequence.

                  1. use a command ./voxl-esc-verify-params.py , which is part of voxl-esc tools.

                  result.
                  Detected Python version : 3.8.10 (default, May 26 2023, 14:05:08)
                  [GCC 9.4.0]
                  Found voxl-esc tools bin version: 1.2

                  INFO: Params file name : ../voxl-esc-params/boards/esc_params_generic_m0117.xml
                  INFO: Params file size : 7462 bytes

                  INFO: All COM ports:
                  /dev/ttyS0 : ttyS0
                  /dev/ttyUSB0 : FT232R USB UART - FT232R USB UART
                  INFO: UART Port Candidates:
                  /dev/ttyUSB0
                  INFO: Scanning for ESC firmware: /dev/ttyUSB0, baud: 2000000
                  INFO: ESC(s) detected on port: /dev/ttyUSB0, baud rate: 2000000
                  INFO: ESCs detected:
                  INFO: ---------------------
                  ID: 0, SW: 38, HW: 34: ModalAi 4-in-1 ESC (M0117-1)
                  ID: 0
                  ID: 1, SW: 38, HW: 34: ModalAi 4-in-1 ESC (M0117-1)
                  ID: 1
                  ID: 2, SW: 38, HW: 34: ModalAi 4-in-1 ESC (M0117-1)
                  ID: 2
                  ID: 3, SW: 38, HW: 34: ModalAi 4-in-1 ESC (M0117-1)
                  ID: 3

                  INFO: Loading XML config file...
                  INFO: Uploading params...
                  -- board config
                  -- id config
                  -- uart config
                  -- tune config
                  DONE
                  INFO: Resetting ESCs...

                  

2. spin 
   can use a command voxl-esc-spin.py* , which is part of voxl-esc tools. (command with --id 255 )

  result

                  Type "Yes" to continue: yes
                  [0] RPM: 448, PWR: 8, VBAT: 10.25V, TEMPERATURE: 36.24C, CURRENT: 0.02A
                  [1] RPM: 360, PWR: 8, VBAT: 10.64V, TEMPERATURE: 36.50C, CURRENT: 0.30A
                  [2] RPM: 360, PWR: 8, VBAT: 11.46V, TEMPERATURE: 36.31C, CURRENT: 0.59A
                  [3] RPM: 360, PWR: 8, VBAT: 6.66V, TEMPERATURE: 36.58C, CURRENT: 0.31A
                  [0] RPM: 360, PWR: 8, VBAT: 9.17V, TEMPERATURE: 36.34C, CURRENT: 0.04A
                  [1] RPM: 0, PWR: 0, VBAT: 7.99V, TEMPERATURE: 36.64C, CURRENT: 0.10A
                  [2] RPM: 360, PWR: 8, VBAT: 11.11V, TEMPERATURE: 36.50C, CURRENT: 0.59A
                  [3] RPM: 360, PWR: 8, VBAT: 7.80V, TEMPERATURE: 36.56C, CURRENT: 0.28A
                  [0] RPM: 360, PWR: 8, VBAT: 10.90V, TEMPERATURE: 36.57C, CURRENT: -0.06A
                  [1] RPM: 360, PWR: 8, VBAT: 7.38V, TEMPERATURE: 36.72C, CURRENT: 0.34A
                  [2] RPM: 360, PWR: 8, VBAT: 10.07V, TEMPERATURE: 36.77C, CURRENT: 0.17A
                  [3] RPM: 360, PWR: 8, VBAT: 9.72V, TEMPERATURE: 36.74C, CURRENT: 0.21A
                  [0] RPM: 472, PWR: 10, VBAT: 10.32V, TEMPERATURE: 36.82C, CURRENT: 0.02A
                  [1] RPM: 360, PWR: 8, VBAT: 11.10V, TEMPERATURE: 36.81C, CURRENT: 0.32A
                  [2] RPM: 360, PWR: 8, VBAT: 11.42V, TEMPERATURE: 36.88C, CURRENT: 0.60A
                  [3] RPM: 360, PWR: 8, VBAT: 9.03V, TEMPERATURE: 36.79C, CURRENT: 0.38A
                  [0] RPM: 0, PWR: 0, VBAT: 7.05V, TEMPERATURE: 36.88C, CURRENT: 0.03A
                  [1] RPM: 0, PWR: 0, VBAT: 9.28V, TEMPERATURE: 37.00C, CURRENT: 0.09A
                  [2] RPM: 360, PWR: 8, VBAT: 8.09V, TEMPERATURE: 37.16C, CURRENT: 0.31A
                  [3] RPM: 360, PWR: 8, VBAT: 7.45V, TEMPERATURE: 36.97C, CURRENT: 0.27A
                  [0] RPM: 360, PWR: 8, VBAT: 7.46V, TEMPERATURE: 37.10C, CURRENT: 0.30A
                  [1] RPM: 360, PWR: 8, VBAT: 9.03V, TEMPERATURE: 37.15C, CURRENT: 0.17A
                  [2] RPM: 360, PWR: 8, VBAT: 9.36V, TEMPERATURE: 37.36C, CURRENT: 0.11A
                  [3] RPM: 360, PWR: 8, VBAT: 9.52V, TEMPERATURE: 37.12C, CURRENT: 0.21A
                  [0] RPM: 0, PWR: 8, VBAT: 9.44V, TEMPERATURE: 37.31C, CURRENT: -0.01A
                  [1] RPM: 0, PWR: 0, VBAT: 7.31V, TEMPERATURE: 37.25C, CURRENT: 0.08A
                  [2] RPM: 0, PWR: 0, VBAT: 9.27V, TEMPERATURE: 37.49C, CURRENT: 0.13A
                  [3] RPM: 360, PWR: 8, VBAT: 7.53V, TEMPERATURE: 37.20C, CURRENT: 0.38A
                  [0] RPM: 0, PWR: 0, VBAT: 7.40V, TEMPERATURE: 37.37C, CURRENT: 0.05A
                  [1] RPM: 360, PWR: 8, VBAT: 7.23V, TEMPERATURE: 37.41C, CURRENT: 0.38A
                  [2] RPM: 360, PWR: 8, VBAT: 7.37V, TEMPERATURE: 37.63C, CURRENT: 0.37A
                  [3] RPM: 360, PWR: 8, VBAT: 7.85V, TEMPERATURE: 37.41C, CURRENT: 0.27A
                  [0] RPM: 360, PWR: 8, VBAT: 7.60V, TEMPERATURE: 37.64C, CURRENT: 0.31A
                  [1] RPM: 360, PWR: 8, VBAT: 9.00V, TEMPERATURE: 37.53C, CURRENT: 0.18A
                  [2] RPM: 343, PWR: 8, VBAT: 9.31V, TEMPERATURE: 37.78C, CURRENT: 0.02A
                  [3] RPM: 360, PWR: 8, VBAT: 9.31V, TEMPERATURE: 37.49C, CURRENT: 0.15A
                  [0] RPM: 0, PWR: 8, VBAT: 9.32V, TEMPERATURE: 37.71C, CURRENT: -0.06A
                  [1] RPM: 0, PWR: 0, VBAT: 7.34V, TEMPERATURE: 37.60C, CURRENT: 0.04A
                  [2] RPM: 0, PWR: 0, VBAT: 9.17V, TEMPERATURE: 37.97C, CURRENT: 0.10A
                  [3] RPM: 360, PWR: 8, VBAT: 7.46V, TEMPERATURE: 37.67C, CURRENT: 0.33A
                  [0] RPM: 0, PWR: 0, VBAT: 7.37V, TEMPERATURE: 37.93C, CURRENT: 0.06A
                  [1] RPM: 360, PWR: 8, VBAT: 7.38V, TEMPERATURE: 37.78C, CURRENT: 0.28A
                  [2] RPM: 360, PWR: 8, VBAT: 7.47V, TEMPERATURE: 38.07C, CURRENT: 0.36A
                  [3] RPM: 360, PWR: 8, VBAT: 7.88V, TEMPERATURE: 37.75C, CURRENT: 0.28A
                  [0] RPM: 360, PWR: 8, VBAT: 7.59V, TEMPERATURE: 38.10C, CURRENT: 0.28A
                  [1] RPM: 360, PWR: 8, VBAT: 9.14V, TEMPERATURE: 37.85C, CURRENT: 0.23A
                  [2] RPM: 360, PWR: 8, VBAT: 9.70V, TEMPERATURE: 38.09C, CURRENT: 0.11A
                  [3] RPM: 360, PWR: 8, VBAT: 9.30V, TEMPERATURE: 37.86C, CURRENT: 0.18A

                    as you see, the result seems wrong and motor didn't spin well.
  The motor moves with a ticking sound and struggles.

3. use a command ./voxl-esc-verify-params.py  one more time , which is part of voxl-esc tools. 

result was changed.

                  Detected Python version : 3.8.10 (default, May 26 2023, 14:05:08)
                  [GCC 9.4.0]
                  Found voxl-esc tools bin version: 1.2
                  INFO: All COM ports:
                  /dev/ttyS0 : ttyS0
                  /dev/ttyUSB0 : FT232R USB UART - FT232R USB UART
                  INFO: UART Port Candidates:
                  /dev/ttyUSB0
                  INFO: Scanning for ESC firmware: /dev/ttyUSB0, baud: 2000000
                  INFO: ESC(s) detected on port: /dev/ttyUSB0, baud rate: 2000000
                  UART config CRC mismatch 58230 != 0
                  ERROR: Params for ID 0 are invalid!
                  INFO: Params from ID 1 match ../voxl-esc-params/boards/esc_params_generic_m0117.xml
                  UART config CRC mismatch 58230 != 0
                  ERROR: Params for ID 2 are invalid!
                  UART config CRC mismatch 58230 != 0
                  ERROR: Params for ID 3 are invalid!
                  ERROR: Params from ID 0 and 1 are not the same
                  ERROR: Some params are invalid or not the same!
                  Number of ESCs expected : 4
                  Number of ESCs found : 4
                  Number of invalid params : 3
                  Number of matched params : 3

                  
can u give me any advise in this issue?
                  Alex KushleyevA 1 Reply Last reply Reply Quote 0
                  • Alex KushleyevA
                    Alex Kushleyev Dev Team @aiden
                    last edited by

                    @aiden

                    can you please provide output of ./voxl-esc-scan.py ? it will give me information about exact firmware version.

                    Also, how are you powering the ESC? it seems during start-up attempt the voltage is dropping from 11V to 7V during spin-up, which is not a good sign. Are you using a weak power supply?

                    Alex

                    Alex KushleyevA A 2 Replies Last reply Reply Quote 0
                    • Alex KushleyevA
                      Alex Kushleyev Dev Team @Alex Kushleyev
                      last edited by

                      On our ESC the Mosfet driver has a feature called "under voltage lockout", so if the supply voltage drops to below about 4.5V (even for a very brief period of time), the Mosfet Driver will enter fault state and will not drive the mosfets. The Mosfet driver gets reset by ESC software before each start-up.

                      So if you are seeing that sometimes a motor is not even attempting to spin, you are likely connected to a weak power supply that causes voltage to drop very low and cause a fault in the Mosfet Driver chip on the ESC.

                      Even though your log is showing voltage of about 7.5V, it is possible that there was an even lower dip, because the data is printed is at very low rate, so we don't see the dip.

                      Alex

                      1 Reply Last reply Reply Quote 0
                      • A
                        aiden @Alex Kushleyev
                        last edited by

                        @Alex-Kushleyev

                        here is out put from ./voxl-esc-scan.py.
                        ~/voxl-esc/voxl-esc-tools$ ./voxl-esc-scan.py
                        Detected Python version : 3.8.10 (default, May 26 2023, 14:05:08)
                        [GCC 9.4.0]
                        Found voxl-esc tools bin version: 1.2
                        INFO: All COM ports:
                        /dev/ttyS0 : ttyS0
                        /dev/ttyUSB0 : FT232R USB UART - FT232R USB UART
                        INFO: UART Port Candidates:
                        /dev/ttyUSB0
                        INFO: Scanning for ESC firmware: /dev/ttyUSB0, baud: 2000000
                        INFO: ESC(s) detected on port: /dev/ttyUSB0, baud rate: 2000000
                        INFO: Detected protocol: firmware
                        INFO: Additional Information:
                        INFO: ---------------------
                        ID : 0
                        Board : version 34: ModalAi 4-in-1 ESC (M0117-1)
                        UID : 0x203034305743570C00280022
                        Firmware : version 38, hash 83faccfa
                        Bootloader : version 183, hash 25317f42

                        ID         : 1
Board      : version 34: ModalAi 4-in-1 ESC (M0117-1)
UID        : 0x203034305743570C00190039
Firmware   : version   38, hash 83faccfa
Bootloader : version  183, hash 25317f42

ID         : 2
Board      : version 34: ModalAi 4-in-1 ESC (M0117-1)
UID        : 0x203034305743570C001A0047
Firmware   : version   38, hash 83faccfa
Bootloader : version  183, hash 25317f42

ID         : 3
Board      : version 34: ModalAi 4-in-1 ESC (M0117-1)
UID        : 0x203034305743570C003B004F
Firmware   : version   38, hash 83faccfa
Bootloader : version  183, hash 25317f42

                        and we supplied 12v in esc.

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