# General Questions **URL:** https://forum.ubiquityrobotics.com/c/general-questions/3.md [Latest](https://forum.ubiquityrobotics.com/latest.md) · [Categories](https://forum.ubiquityrobotics.com/categories.md) --- ## [Conversion from ticks/100ms to linear speed m/s](https://forum.ubiquityrobotics.com/t/conversion-from-ticks-100ms-to-linear-speed-m-s/1129)
**Author:** [@teck\_ping](https://forum.ubiquityrobotics.com/u/teck_ping)\ **Replies:** 0\ **Last updated:** [September 27, 2024, 5:39pm UTC](https://forum.ubiquityrobotics.com/t/conversion-from-ticks-100ms-to-linear-speed-m-s/1129 "2024-09-27T17:39:42Z")
I have a question about the quadrature mode of the encoder used in the Magni. When I command the wheels to turn at 25ticks/100ms, I observe the linear speed to be 0.3125m/s. However, in the documentation at Diagnostics… --- ## [Motor Control Board EMC Compatiblity](https://forum.ubiquityrobotics.com/t/motor-control-board-emc-compatiblity/1128)
**Author:** [@slavmartinov](https://forum.ubiquityrobotics.com/u/slavmartinov)\ **Replies:** 0\ **Last updated:** [September 19, 2024, 4:02pm UTC](https://forum.ubiquityrobotics.com/t/motor-control-board-emc-compatiblity/1128 "2024-09-19T16:02:35Z")
Hello, I am wondering if anyone has demonstrated EMC Compatibility for the MCB or has demonstrated compliance with FCC rules? Thank you Slav --- ## [Rosservice API not working](https://forum.ubiquityrobotics.com/t/rosservice-api-not-working/1126)
**Author:** [@areslab1424](https://forum.ubiquityrobotics.com/u/areslab1424)\ **Replies:** 0\ **Last updated:** [September 3, 2024, 11:09pm UTC](https://forum.ubiquityrobotics.com/t/rosservice-api-not-working/1126 "2024-09-03T23:09:50Z")
Hi, I am trying to call rosservice “route\_forward” from terminal, which mentioned in the documentation. ( Advanced Documentation - Magni Documentation ) For example, I have a test route called “route” saved in a map, a… --- ## [Problems with catkin and custom code](https://forum.ubiquityrobotics.com/t/problems-with-catkin-and-custom-code/1117)
**Author:** [@BrysonSmith15](https://forum.ubiquityrobotics.com/u/BrysonSmith15)\ **Replies:** 2\ **Last updated:** [June 7, 2024, 11:59am UTC](https://forum.ubiquityrobotics.com/t/problems-with-catkin-and-custom-code/1117 "2024-06-07T11:59:13Z")
I am working with the Magni robot base with some custom hardware on top, and in the early development stages, I have encountered some struggles. Does my workstation have to run the same version of ubuntu as the robot? … --- ## [How to stop the odom tf from motor\_node?](https://forum.ubiquityrobotics.com/t/how-to-stop-the-odom-tf-from-motor-node/1114)
**Author:** [@bigh](https://forum.ubiquityrobotics.com/u/bigh)\ **Replies:** 1\ **Last updated:** [April 10, 2024, 2:28pm UTC](https://forum.ubiquityrobotics.com/t/how-to-stop-the-odom-tf-from-motor-node/1114 "2024-04-10T14:28:59Z")
In order to use the ekf\_localization function, the setting of ‘enable\_odom\_tf’ in the default\_robot.yaml file was changed to False to disable odom\_tf broadcasting on motor\_node, but odim\_tf is still broadcasting from mot… --- ## [Keyserver fauilure](https://forum.ubiquityrobotics.com/t/keyserver-fauilure/1112)
**Author:** [@hyba28](https://forum.ubiquityrobotics.com/u/hyba28)\ **Replies:** 0\ **Last updated:** [March 5, 2024, 2:33pm UTC](https://forum.ubiquityrobotics.com/t/keyserver-fauilure/1112 "2024-03-05T14:33:13Z")
Hey, I got a problem when I would like to add your repositiories to my workspace. As it said here: Package Repositories - Magni Documentation, Ubuntu 20.04 Virtual Machine, ROS Noetic version To add the repositories i… --- ## [Keyserver failure](https://forum.ubiquityrobotics.com/t/keyserver-failure/1096)
**Author:** [@EricoMeger](https://forum.ubiquityrobotics.com/u/EricoMeger)\ **Replies:** 8\ **Last updated:** [March 5, 2024, 8:46am UTC](https://forum.ubiquityrobotics.com/t/keyserver-failure/1096 "2024-03-05T08:46:49Z")
I’am trying to add ubiquity repo on a ubuntu 20.04 (non-ubiquity image) following the documentation: noetic\_packages\_repositories but adding keyserver wont work: Executing: /tmp/apt-key-gpghome.zBSETbPUSW/gpg.1.sh --ke… --- ## [How to change the topic that odom is published](https://forum.ubiquityrobotics.com/t/how-to-change-the-topic-that-odom-is-published/1087)
**Author:** [@MarkCuck334](https://forum.ubiquityrobotics.com/u/MarkCuck334)\ **Replies:** 4\ **Last updated:** [November 7, 2023, 11:22am UTC](https://forum.ubiquityrobotics.com/t/how-to-change-the-topic-that-odom-is-published/1087 "2023-11-07T11:22:45Z")
Hey. I’m trying to use robot\_localization to merge my wheels odom with an imu, and needed to make so that instead of ubiquity publishing the odometry to /odom topic it publishes on a topic like /ubiquity\_odom. I tried to… --- ## [Problems with the MCB v5.0](https://forum.ubiquityrobotics.com/t/problems-with-the-mcb-v5-0/1084)
**Author:** [@GustavoGunther](https://forum.ubiquityrobotics.com/u/GustavoGunther)\ **Replies:** 4\ **Last updated:** [October 11, 2023, 7:38pm UTC](https://forum.ubiquityrobotics.com/t/problems-with-the-mcb-v5-0/1084 "2023-10-11T19:38:46Z")
Hello again! I’ve been trying to test some wheels on a ubiquity MCB v5.0, however they act strange, one doesn’t move at all and the other whenever something tries to move it, be it manually or using ros teleop, starts t… --- ## [Queston about the battery\_state topic](https://forum.ubiquityrobotics.com/t/queston-about-the-battery-state-topic/1079)
**Author:** [@MarkCuck334](https://forum.ubiquityrobotics.com/u/MarkCuck334)\ **Replies:** 3\ **Last updated:** [October 5, 2023, 6:56am UTC](https://forum.ubiquityrobotics.com/t/queston-about-the-battery-state-topic/1079 "2023-10-05T06:56:47Z")
Hey, I have a question about the battery\_state topic. Recently, the battery\_state voltage hasn’t been the same as shown in my multimeter when I measure my batteries. It usually has a 0.5v difference, rn, on my multimet… --- ## [Questions about MCB v5.3](https://forum.ubiquityrobotics.com/t/questions-about-mcb-v5-3/1080)
**Author:** [@GustavoGunther](https://forum.ubiquityrobotics.com/u/GustavoGunther)\ **Replies:** 2\ **Last updated:** [September 28, 2023, 9:24am UTC](https://forum.ubiquityrobotics.com/t/questions-about-mcb-v5-3/1080 "2023-09-28T09:24:11Z")
Hello everyone, I wanted to know if the MCB v5.3 has support for ROS2, I know that previous board had various internal codes that published information on the board so the software could interact with it. Does v5.3 have… --- ## [Swapping Rasberry pi board for an NVIDIA board](https://forum.ubiquityrobotics.com/t/swapping-rasberry-pi-board-for-an-nvidia-board/1069)
**Author:** [@Ntokozo](https://forum.ubiquityrobotics.com/u/Ntokozo)\ **Replies:** 3\ **Last updated:** [July 14, 2023, 6:49am UTC](https://forum.ubiquityrobotics.com/t/swapping-rasberry-pi-board-for-an-nvidia-board/1069 "2023-07-14T06:49:26Z")
I would like to purchase the Magni autonomous robot. But I would like to use an NVIDIA board as the control board instead of the raspberry pi that the Magni robot comes with. Is the code base directly transferable to an … --- ## [Raspberry pi 4 wont turn on hotspot when connected to ubiquity](https://forum.ubiquityrobotics.com/t/raspberry-pi-4-wont-turn-on-hotspot-when-connected-to-ubiquity/1061)
**Author:** [@MarkCuck334](https://forum.ubiquityrobotics.com/u/MarkCuck334)\ **Replies:** 7\ **Last updated:** [July 6, 2023, 6:42am UTC](https://forum.ubiquityrobotics.com/t/raspberry-pi-4-wont-turn-on-hotspot-when-connected-to-ubiquity/1061 "2023-07-06T06:42:22Z")
Hello, I was using a pi3 on ubiquity and it worked fine, but we’re trying to upgrade it to a pi4 as we need more processing power. We used the exact same sd card with the latest kinectic image, we tested the pi4 headless… --- ## [Questions about the P601 pins and power suppy to Lidar sensor](https://forum.ubiquityrobotics.com/t/questions-about-the-p601-pins-and-power-suppy-to-lidar-sensor/1066)
**Author:** [@GustavoGunther](https://forum.ubiquityrobotics.com/u/GustavoGunther)\ **Replies:** 1\ **Last updated:** [July 6, 2023, 6:40am UTC](https://forum.ubiquityrobotics.com/t/questions-about-the-p601-pins-and-power-suppy-to-lidar-sensor/1066 "2023-07-06T06:40:00Z")
Hello, I’m building a robot that uses the magni chassis and the ubiquity board 5.0, on this P601 there are 24V, GND, motor and board supply. Is the 24V supply treated somewhere before on the board or is is the same as th… --- ## [Wifi is not showingup in available networks](https://forum.ubiquityrobotics.com/t/wifi-is-not-showingup-in-available-networks/1054)
**Author:** [@dekhanra](https://forum.ubiquityrobotics.com/u/dekhanra)\ **Replies:** 1\ **Last updated:** [May 12, 2023, 10:13pm UTC](https://forum.ubiquityrobotics.com/t/wifi-is-not-showingup-in-available-networks/1054 "2023-05-12T22:13:16Z")
Hi everyone, I recently connected to my Magni Robot via wifi as mentioned in documentation and I gave a try to connect via Ethernet and it didn’t work. Now I want to set the Static IP on Raspi and try to connect via Eth… --- ## [Disabling the Motor but not the ROS nodes for the wheel encoders for wheel odometry](https://forum.ubiquityrobotics.com/t/disabling-the-motor-but-not-the-ros-nodes-for-the-wheel-encoders-for-wheel-odometry/552)
**Author:** [@ravi](https://forum.ubiquityrobotics.com/u/ravi)\ **Replies:** 15\ **Last updated:** [February 15, 2023, 9:33am UTC](https://forum.ubiquityrobotics.com/t/disabling-the-motor-but-not-the-ros-nodes-for-the-wheel-encoders-for-wheel-odometry/552 "2023-02-15T09:33:03Z")
Is there a way to electrically disable the two hub motors only while keeping the wheel odometry encoders up and running with everything else powered ON and running? By everything else, I mean the Raspberry Pi is up and r… --- ## [Magni accuracy /repeatability](https://forum.ubiquityrobotics.com/t/magni-accuracy-repeatability/1038)
**Author:** [@LVV](https://forum.ubiquityrobotics.com/u/LVV)\ **Replies:** 2\ **Last updated:** [February 6, 2023, 2:38pm UTC](https://forum.ubiquityrobotics.com/t/magni-accuracy-repeatability/1038 "2023-02-06T14:38:03Z")
Hi, is there any data on Magni accuracy? anyone use it to do transferring of item? --- ## [Rotated camera and rviz problem](https://forum.ubiquityrobotics.com/t/rotated-camera-and-rviz-problem/1025)
**Author:** [@Krzysztof](https://forum.ubiquityrobotics.com/u/Krzysztof)\ **Replies:** 4\ **Last updated:** [December 20, 2022, 11:08am UTC](https://forum.ubiquityrobotics.com/t/rotated-camera-and-rviz-problem/1025 "2022-12-20T11:08:40Z")
Hello, The camera feed provided in RViz and rqt\_image\_view seems to be rotated by 90 degrees (on the photo below, I’m standing on the left side of the robot pointing forward). In the robot.yaml, the Raspicam’s position … --- ## [How to lower the Magni deceleration on conveyor](https://forum.ubiquityrobotics.com/t/how-to-lower-the-magni-deceleration-on-conveyor/1028)
**Author:** [@LVV](https://forum.ubiquityrobotics.com/u/LVV)\ **Replies:** 1\ **Last updated:** [December 23, 2022, 3:05pm UTC](https://forum.ubiquityrobotics.com/t/how-to-lower-the-magni-deceleration-on-conveyor/1028 "2022-12-23T15:05:20Z")
Can someone please show me which parameter to change to lower the deceleration for conveyor bot? --- ## [Can't find the home directory](https://forum.ubiquityrobotics.com/t/cant-find-the-home-directory/1019)
**Author:** [@joe2256313](https://forum.ubiquityrobotics.com/u/joe2256313)\ **Replies:** 2\ **Last updated:** [October 20, 2022, 8:42pm UTC](https://forum.ubiquityrobotics.com/t/cant-find-the-home-directory/1019 "2022-10-20T20:42:33Z")
How can I open the home directory in the graphical interface? I can’t find the icon of File, just as provided in my attachment. I want to use the graphical interface directly like an ordinary ubuntu. What should I do? --- ## [Localization when using move\_base](https://forum.ubiquityrobotics.com/t/localization-when-using-move-base/1010)
**Author:** [@Tanay13](https://forum.ubiquityrobotics.com/u/Tanay13)\ **Replies:** 4\ **Last updated:** [September 4, 2022, 3:47pm UTC](https://forum.ubiquityrobotics.com/t/localization-when-using-move-base/1010 "2022-09-04T15:47:22Z")
Hi everyone, I’ve been trying to use the move\_base function with a pre-loaded map to set goals and test the Magni’s ability to navigate around obstacles to reach the goal specified. The map was created using Gmapping wi… --- ## [Conveyorbot not turning on STOP marker](https://forum.ubiquityrobotics.com/t/conveyorbot-not-turning-on-stop-marker/1005)
**Author:** [@gjkeena](https://forum.ubiquityrobotics.com/u/gjkeena)\ **Replies:** 5\ **Last updated:** [August 29, 2022, 7:21pm UTC](https://forum.ubiquityrobotics.com/t/conveyorbot-not-turning-on-stop-marker/1005 "2022-08-29T19:21:37Z")
Just got the Magni with Conveyorbot. All the markers seem to work except the Stop Marker. On a Stop marker that points in the opposite direction the Conveyorbot is originally moving, the Conveyorbot does not detect the S… --- ## [Docker Magni Simulation](https://forum.ubiquityrobotics.com/t/docker-magni-simulation/500)
**Author:** [@PedroDesRobots](https://forum.ubiquityrobotics.com/u/PedroDesRobots)\ **Replies:** 4\ **Last updated:** [August 29, 2022, 6:58pm UTC](https://forum.ubiquityrobotics.com/t/docker-magni-simulation/500 "2022-08-29T18:58:18Z")
Hi all, For information, I have created a docker file to setup nicely a docker image based-on ubuntu 16.04 / ROS Kinetic and install all the needed Magni’s dependencies for gazebo simulation. https://github.com/PedroDe… --- ## [Magni with Ubuntu 20.04](https://forum.ubiquityrobotics.com/t/magni-with-ubuntu-20-04/999)
**Author:** [@Tanay13](https://forum.ubiquityrobotics.com/u/Tanay13)\ **Replies:** 4\ **Last updated:** [August 19, 2022, 2:36am UTC](https://forum.ubiquityrobotics.com/t/magni-with-ubuntu-20-04/999 "2022-08-19T02:36:49Z")
Hi, I am trying to run the Magni Silver’s mapping functions with Ubuntu 20.04 and ROS Noetic. I’ve downloaded and flashed the latest Noetic image onto the SD card and have a dual boot Ubuntu 20.04 workstation. However o… --- ## [Preventing Theft/vandalism of Magni Robot in public](https://forum.ubiquityrobotics.com/t/preventing-theft-vandalism-of-magni-robot-in-public/989)
**Author:** [@justinzw](https://forum.ubiquityrobotics.com/u/justinzw)\ **Replies:** 3\ **Last updated:** [August 9, 2022, 2:23am UTC](https://forum.ubiquityrobotics.com/t/preventing-theft-vandalism-of-magni-robot-in-public/989 "2022-08-09T02:23:57Z")
We have somewhat of a unique situation. We will be using our Magni outside and maybe sometimes unsupervised. Has anyone have any experience with preventing theft/vandalism of the robot? Any creative ideas that have de… --- ## [Ubiquity magni robot supply problems](https://forum.ubiquityrobotics.com/t/ubiquity-magni-robot-supply-problems/993)
**Author:** [@marcelocunha65](https://forum.ubiquityrobotics.com/u/marcelocunha65)\ **Replies:** 5\ **Last updated:** [August 4, 2022, 5:18am UTC](https://forum.ubiquityrobotics.com/t/ubiquity-magni-robot-supply-problems/993 "2022-08-04T05:18:40Z")
Hello, I am working with the magni robot for my master’s degree thesis in the Politechnic Institute of Engineering in Porto, Portugal. Lately I am having some problems regarding the power supply of the robot. First the… --- ## [Motor\_node fails with 'Firmware not reporting its version'](https://forum.ubiquityrobotics.com/t/motor-node-fails-with-firmware-not-reporting-its-version/183)
**Author:** [@bhuvanchandradv](https://forum.ubiquityrobotics.com/u/bhuvanchandradv)\ **Replies:** 14\ **Last updated:** [July 8, 2022, 1:24pm UTC](https://forum.ubiquityrobotics.com/t/motor-node-fails-with-firmware-not-reporting-its-version/183 "2022-07-08T13:24:26Z")
Hello! Lately I’m facing issues with motor\_node. The logs of magni\_base shows " Firmware not reporting its version". I’m using the Ubiquity Robotics Ubuntu image. One thing I did is enabling the uart to use for debug se… --- ## [ROS2 support and when](https://forum.ubiquityrobotics.com/t/ros2-support-and-when/373)
**Author:** [@cowabunga](https://forum.ubiquityrobotics.com/u/cowabunga)\ **Replies:** 6\ **Last updated:** [July 8, 2022, 12:26am UTC](https://forum.ubiquityrobotics.com/t/ros2-support-and-when/373 "2022-07-08T00:26:43Z")
Do you guys intend to get magni working on ROS2 soon? Any dates to that as well? Mind if I took a look at the development? --- ## [Magni move base, does it work properly?](https://forum.ubiquityrobotics.com/t/magni-move-base-does-it-work-properly/849)
**Author:** [@inmoov](https://forum.ubiquityrobotics.com/u/inmoov)\ **Replies:** 14\ **Last updated:** [July 2, 2022, 1:30pm UTC](https://forum.ubiquityrobotics.com/t/magni-move-base-does-it-work-properly/849 "2022-07-02T13:30:55Z")
Hi Ubiquityrobotics, All, I’m trying to use move base (path planners) with Magni in a Gazebo enviroment, first question is are the parameters tweaked to optimal? (below, say for global costmap, local costmap and common… --- ## [Battery Charger Problem](https://forum.ubiquityrobotics.com/t/battery-charger-problem/976)
**Author:** [@alexjr](https://forum.ubiquityrobotics.com/u/alexjr)\ **Replies:** 3\ **Last updated:** [June 30, 2022, 6:12pm UTC](https://forum.ubiquityrobotics.com/t/battery-charger-problem/976 "2022-06-30T18:12:38Z")
Hello, my battery charger for the Magni robot, is no longer working. When plugged in, none of the indicator LEDs light up. LED1 is on when connected to the robot plug, but LED2 which should indicate the charging procedur… [Next page](https://forum.ubiquityrobotics.com/c/general-questions/3.md?page=1)