Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Collapse
Brand Logo

ModalAI Forum

  1. ModalAI Support Forum
  2. VOXL Dev Kits
  3. VOXL Flight Deck
  4. VOXL M500 vision problem!!

VOXL M500 vision problem!!

Scheduled Pinned Locked Moved VOXL Flight Deck
13 Posts 4 Posters 2.7k Views 3 Watching
  • 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.
  • Vũ Văn LongV Offline
    Vũ Văn LongV Offline
    Vũ Văn Long
    Contributor
    wrote on last edited by Vũ Văn Long
    #1

    Hello, me again my voxl m500 frame is driff while fly in position mode Screenshot from 2021-01-20 10-42-11.png

    here is the voxl/vision-px4.conf text. last time after reset the configuration to the factory -> then i also changed the offboard mode to "off" and the m500 can fly in poistion mode but the performance is not good, it's mean sometime the the driff was maintained. i think the problem is not here. (about reset the vision-config to the factory, i just reset and not config anything...
    pls help me!

    1 Reply Last reply
    0
    • Chad SweetC Offline
      Chad SweetC Offline
      Chad Sweet
      ModalAI Team
      wrote on last edited by
      #2

      Is the tracking camera looking at interesting "features" when it takes off, or is it just white floor? If it can start on a carpet or something, the vision system will have something to track. this will help VIO reduce drift.

      1 Reply Last reply
      0
      • Vũ Văn LongV Offline
        Vũ Văn LongV Offline
        Vũ Văn Long
        Contributor
        wrote on last edited by
        #3

        it just is a whitle floor like this 140399418_1382482975425604_1999387540459859908_n.jpg

        1 Reply Last reply
        0
        • Chad SweetC Offline
          Chad SweetC Offline
          Chad Sweet
          ModalAI Team
          wrote on last edited by
          #4

          Can you put some pieces of duct tape on the floor or something to make it more interesting to the VIO system? Especially since it looks like that floor might be reflective. Random small pieces of tape, like electrical or duct tape, would likely help.

          You can monitor the VIO stability on QGC. Those numbers should stabilize after takeoff, but obviously you want them stable on the ground too.

          Vũ Văn LongV 1 Reply Last reply
          0
          • Chad SweetC Chad Sweet

            Can you put some pieces of duct tape on the floor or something to make it more interesting to the VIO system? Especially since it looks like that floor might be reflective. Random small pieces of tape, like electrical or duct tape, would likely help.

            You can monitor the VIO stability on QGC. Those numbers should stabilize after takeoff, but obviously you want them stable on the ground too.

            Vũ Văn LongV Offline
            Vũ Văn LongV Offline
            Vũ Văn Long
            Contributor
            wrote on last edited by
            #5

            hi, here is the video i just captured https://drive.google.com/file/d/1Am63zD09am8nx_BBpAB2JfTYcf_IFMST/view?usp=sharing

            1 Reply Last reply
            0
            • Vũ Văn LongV Offline
              Vũ Văn LongV Offline
              Vũ Văn Long
              Contributor
              wrote on last edited by
              #6

              the local NED position is look good at the init state as well as when i move the drone into the other location.

              1 Reply Last reply
              0
              • Chad SweetC Offline
                Chad SweetC Offline
                Chad Sweet
                ModalAI Team
                wrote on last edited by
                #7

                thanks for sending, I will pass along to someone more familiar. Was this all working before? Do you know what has changed?

                1 Reply Last reply
                0
                • Vũ Văn LongV Offline
                  Vũ Văn LongV Offline
                  Vũ Văn Long
                  Contributor
                  wrote on last edited by
                  #8

                  last week it used to work normally. i did't changed any strange thing, just re-configuration the drone to the factory state. by "voxl-configure-vision-px4 -f" to take again the NED position cuz before that i had config vision lib by "voxl-configure-modalai-vl" and the local poistion is lost.

                  1 Reply Last reply
                  0
                  • Vũ Văn LongV Offline
                    Vũ Văn LongV Offline
                    Vũ Văn Long
                    Contributor
                    wrote on last edited by
                    #9

                    pls help me soon. we can set up an online support via teamview to make the problem more clearly.

                    1 Reply Last reply
                    0
                    • James StrawsonJ Offline
                      James StrawsonJ Offline
                      James Strawson
                      ModalAI Team
                      wrote on last edited by
                      #10

                      Does this behavior only occur in PX4 position mode? Does it fly in PX4 manual mode?

                      Vũ Văn LongV 1 Reply Last reply
                      0
                      • James StrawsonJ James Strawson

                        Does this behavior only occur in PX4 position mode? Does it fly in PX4 manual mode?

                        Vũ Văn LongV Offline
                        Vũ Văn LongV Offline
                        Vũ Văn Long
                        Contributor
                        wrote on last edited by
                        #11

                        @James-Strawson yes,we only test uav in position mode. we didn't use manual for testing.

                        1 Reply Last reply
                        0
                        • Chad SweetC Offline
                          Chad SweetC Offline
                          Chad Sweet
                          ModalAI Team
                          wrote on last edited by
                          #12

                          Please try manual mode. it seems there might be a PX4 parameter mismatch. It would be good to see if the m500 flies properly without VIO.

                          @modaltb Do you have a pointer to the Flight Core factory parmeters?

                          The VIO indoor EKF parameters are here

                          1 Reply Last reply
                          0
                          • modaltbM Offline
                            modaltbM Offline
                            modaltb
                            ModalAI Team
                            wrote on last edited by
                            #13

                            There's a few files (as we use DRY even on params 😉 The procedure to do this is here

                            When you reload the airframe (via these parameters) you'll end up losing calibration and having to go through the calibration process. This is documented here

                            You'll end up loading these, in this order:

                            • configures core airframe for m500 with 4S battery (standard):
                              https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/raw/master/platforms/v1.10/m500_4s_config.params

                            • VIO indoor EKF
                              https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/raw/master/helpers/ekf2_indoor_vio.params

                            • Serial params (to be safe, these should be set by default)
                              https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/blob/master/helpers/mavlink_serial_ports.params

                            • If needed and applicable, radio
                              https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/blob/master/helpers/gimbal_dx8_config.params

                            1 Reply Last reply
                            0

                            Hello! It looks like you're interested in this conversation, but you don't have an account yet.

                            Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.

                            With your input, this post could be even better 💗

                            Register Login
                            Reply
                            • Reply as topic
                            Log in to reply
                            • Oldest to Newest
                            • Newest to Oldest
                            • Most Votes


                            ModalAI
                            Categories Recent Tags ModalAI.com Docs
                            © 2026 ModalAI® · Accelerating autonomy for smaller, smarter, safer drones · Powered by NodeBB
                            • Login

                            • Don't have an account? Register

                            • Login or register to search.
                            • First post
                              Last post
                            0
                            • Categories
                            • Recent
                            • Tags
                            • Popular
                            • Users
                            • Groups