# Ask **URL:** https://forum.hello-robot.com/c/ask/5.md [Latest](https://forum.hello-robot.com/latest.md) · [Categories](https://forum.hello-robot.com/categories.md) --- ## [Battery Replacement Options for a Stretch RE2 Upgraded to RE3](https://forum.hello-robot.com/t/battery-replacement-options-for-a-stretch-re2-upgraded-to-re3/1517)
**Author:** [@david](https://forum.hello-robot.com/u/david)\ **Replies:** 1\ **Last updated:** [July 13, 2026, 7:00pm UTC](https://forum.hello-robot.com/t/battery-replacement-options-for-a-stretch-re2-upgraded-to-re3/1517 "2026-07-13T19:00:29Z")
Hello, I have a Stretch RE2 that was upgraded to RE3 using the official upgrade kit. Recently, the batteries have been discharging much faster than before, so I am considering replacing them. I am located in South Kor… --- ## [Stretch 3 Charging Station Dimensions](https://forum.hello-robot.com/t/stretch-3-charging-station-dimensions/1516)
**Author:** [@Shwarma0207](https://forum.hello-robot.com/u/Shwarma0207)\ **Replies:** 1\ **Last updated:** [June 26, 2026, 5:57pm UTC](https://forum.hello-robot.com/t/stretch-3-charging-station-dimensions/1516 "2026-06-26T17:57:15Z")
Hello all, I’m playing around with the auto-park script on GitHub, but every time the robot drives into the charging station, the dock flexes and bends back against the wall. I want to 3D print a solid filler block to … --- ## [Data collection with stretch 3 dex teleop kit](https://forum.hello-robot.com/t/data-collection-with-stretch-3-dex-teleop-kit/1514)
**Author:** [@Vaishnavi](https://forum.hello-robot.com/u/Vaishnavi)\ **Replies:** 1\ **Last updated:** [June 17, 2026, 12:51am UTC](https://forum.hello-robot.com/t/data-collection-with-stretch-3-dex-teleop-kit/1514 "2026-06-17T00:51:24Z")
Hello everyone, I am trying to collect data using the stretch 3 dex teleop kit through the stretch\_ai git repo but I am running into few issues with it first the arm lift as it is reaching a maximum of nearly 0.37 and t… --- ## [Grasp Object Demo Issues](https://forum.hello-robot.com/t/grasp-object-demo-issues/1513)
**Author:** [@Shwarma0207](https://forum.hello-robot.com/u/Shwarma0207)\ **Replies:** 1\ **Last updated:** [June 17, 2026, 12:12am UTC](https://forum.hello-robot.com/t/grasp-object-demo-issues/1513 "2026-06-17T00:12:09Z")
Hello, I was having trouble getting the grasp objects demo to work for Stretch3. Specifically, the keyboard teleop is not triggering, despite saying that the grasp demo has launched. I’m new to the Stretch platform, onl… --- ## [Getting data collection working with stretch dex teleop + stretch\_ai](https://forum.hello-robot.com/t/getting-data-collection-working-with-stretch-dex-teleop-stretch-ai/1213)
**Author:** [@daphc](https://forum.hello-robot.com/u/daphc)\ **Replies:** 3\ **Last updated:** [June 16, 2026, 9:23am UTC](https://forum.hello-robot.com/t/getting-data-collection-working-with-stretch-dex-teleop-stretch-ai/1213 "2026-06-16T09:23:48Z")
Hi, I am trying to set up data collection with the new Stretch dexterous teleop kit, and have been following the instructions outlined in the readme. I’m able to run the dex teleop follower on the robot (a Stretch 3) by… --- ## [Issue regarding the charging of stretch 3 robot](https://forum.hello-robot.com/t/issue-regarding-the-charging-of-stretch-3-robot/1510)
**Author:** [@Vaishnavi](https://forum.hello-robot.com/u/Vaishnavi)\ **Replies:** 4\ **Last updated:** [May 27, 2026, 4:34pm UTC](https://forum.hello-robot.com/t/issue-regarding-the-charging-of-stretch-3-robot/1510 "2026-05-27T16:34:54Z")
Currently I am trying to charge the stretch 3 robot coming from storage. Initially I have kept it on AGM mode for nearly 5-6 hours but I have observe that the modes are switching between AGM and the standby . The power … --- ## [Nav2 Goal Rotation Issue](https://forum.hello-robot.com/t/nav2-goal-rotation-issue/1500)
**Author:** [@jsh](https://forum.hello-robot.com/u/jsh)\ **Replies:** 1\ **Last updated:** [May 11, 2026, 6:05pm UTC](https://forum.hello-robot.com/t/nav2-goal-rotation-issue/1500 "2026-05-11T18:05:51Z")
I am facing a problem with my differential-drive robot navigation using ROS2 Humble Nav2. One channel if my motor driver for backward motion is not working, so I disconnected the backward command. Because of this, the r… --- ## [BasicNavigator Spin action](https://forum.hello-robot.com/t/basicnavigator-spin-action/1497)
**Author:** [@gregory\_sin](https://forum.hello-robot.com/u/gregory_sin)\ **Replies:** 4\ **Last updated:** [May 11, 2026, 5:48pm UTC](https://forum.hello-robot.com/t/basicnavigator-spin-action/1497 "2026-05-11T17:48:45Z")
Hello, I am trying to use the Spin action for the BasicNavigator. I am able to successfully use the followWaypoints method. But, when I try using the Spin action (either in python script or commandline): ros2 action se… --- ## [3d printed part to connect D435i head to navigation camera](https://forum.hello-robot.com/t/3d-printed-part-to-connect-d435i-head-to-navigation-camera/1490)
**Author:** [@Egg\_Cag](https://forum.hello-robot.com/u/Egg_Cag)\ **Replies:** 4\ **Last updated:** [May 8, 2026, 11:16pm UTC](https://forum.hello-robot.com/t/3d-printed-part-to-connect-d435i-head-to-navigation-camera/1490 "2026-05-08T23:16:54Z")
Hello, We have a Stretch 2 that has the stretch\_teleop\_kit head part and wide-eye camera on it, and I was wondering if it would be possible for me to get the 3d printed parts for the wide-eye camera to mount directly on… --- ## [Stretch 2 workspace update fail due to realsense apt](https://forum.hello-robot.com/t/stretch-2-workspace-update-fail-due-to-realsense-apt/1485)
**Author:** [@Egg\_Cag](https://forum.hello-robot.com/u/Egg_Cag)\ **Replies:** 11\ **Last updated:** [May 8, 2026, 11:15pm UTC](https://forum.hello-robot.com/t/stretch-2-workspace-update-fail-due-to-realsense-apt/1485 "2026-05-08T23:15:22Z")
Hello, I am currently failing to run stretch\_web\_teleop (running cd ~/ament\_ws/src/stretch\_web\_teleop/ then ./launch\_interface.sh, and as a possible fix I saw at ( Web\_teleop demo got stucked in loading page - #2 by hel… --- ## [Navigation and Arm Movement](https://forum.hello-robot.com/t/navigation-and-arm-movement/1493)
**Author:** [@gregory\_sin](https://forum.hello-robot.com/u/gregory_sin)\ **Replies:** 3\ **Last updated:** [April 28, 2026, 11:12pm UTC](https://forum.hello-robot.com/t/navigation-and-arm-movement/1493 "2026-04-28T23:12:53Z")
Hi hello robot team, I am trying to run the nav2 mapping stack while also running the visual servoing demo. I am running into the issue where both processes can’t get access to the robot body at the same time. Is there … --- ## [Stretch RE1 - No Boot/Black Screen after NVMe File System Failure](https://forum.hello-robot.com/t/stretch-re1-no-boot-black-screen-after-nvme-file-system-failure/1491)
**Author:** [@MathiasBAIR](https://forum.hello-robot.com/u/MathiasBAIR)\ **Replies:** 1\ **Last updated:** [April 27, 2026, 8:19pm UTC](https://forum.hello-robot.com/t/stretch-re1-no-boot-black-screen-after-nvme-file-system-failure/1491 "2026-04-27T20:19:26Z")
Hi everyone, I’m seeking help with a boot failure on my Stretch RE1. Currently, when I power on the robot, the LiDAR begins to spin, but the monitor remains black (though it detects a signal). I am unable to reach the U… --- ## [How do I add custom Mujoco environments to docker install of stretch\_ros2/stretch\_simulation](https://forum.hello-robot.com/t/how-do-i-add-custom-mujoco-environments-to-docker-install-of-stretch-ros2-stretch-simulation/1479)
**Author:** [@jimmy](https://forum.hello-robot.com/u/jimmy)\ **Replies:** 8\ **Last updated:** [April 20, 2026, 10:31pm UTC](https://forum.hello-robot.com/t/how-do-i-add-custom-mujoco-environments-to-docker-install-of-stretch-ros2-stretch-simulation/1479 "2026-04-20T22:31:32Z")
Hi, I am getting started in using the docker installation of the stretch mujoco simulation and am wondering if I can upload a custom mujoco scene or even just a plain scene where the robot starts at the origin on a a ba… --- ## [Unable to find depth camera](https://forum.hello-robot.com/t/unable-to-find-depth-camera/1477)
**Author:** [@ZachNobles](https://forum.hello-robot.com/u/ZachNobles)\ **Replies:** 7\ **Last updated:** [April 20, 2026, 4:53pm UTC](https://forum.hello-robot.com/t/unable-to-find-depth-camera/1477 "2026-04-20T16:53:05Z")
Hello, I recently ran into an issue where the depth camera topic was publishing all 0s, so I ran stretch\_camera\_streams\_check.py and got this output: For use with S T R E T C H (R) from Hello Robot Inc. ---------------… --- ## [NAV2 Stack + Aruco Alignment](https://forum.hello-robot.com/t/nav2-stack-aruco-alignment/1480)
**Author:** [@JonathanDistler25](https://forum.hello-robot.com/u/JonathanDistler25)\ **Replies:** 4\ **Last updated:** [April 15, 2026, 8:23pm UTC](https://forum.hello-robot.com/t/nav2-stack-aruco-alignment/1480 "2026-04-15T20:23:11Z")
I was trying to use the Nav2 stack to navigate towards a preset Aruco marker, then I was hoping to use the aruco\_align functionality to align the Stretch RE1 with the aruco marker for a pick task. However, it seems like … --- ## [Troubles Turning Stretch On](https://forum.hello-robot.com/t/troubles-turning-stretch-on/1484)
**Author:** [@allib](https://forum.hello-robot.com/u/allib)\ **Replies:** 2\ **Last updated:** [April 15, 2026, 5:17pm UTC](https://forum.hello-robot.com/t/troubles-turning-stretch-on/1484 "2026-04-15T17:17:42Z")
I am having trouble turning on my Stretch. My Stretch 2 was working normally yesterday and was plugged in to charge the same way we have always done. When I went to power it on today, I left it plugged in charging and h… --- ## [About teleop twist keyboard i controling robot](https://forum.hello-robot.com/t/about-teleop-twist-keyboard-i-controling-robot/1478)
**Author:** [@jaj](https://forum.hello-robot.com/u/jaj)\ **Replies:** 2\ **Last updated:** [April 13, 2026, 5:17pm UTC](https://forum.hello-robot.com/t/about-teleop-twist-keyboard-i-controling-robot/1478 "2026-04-13T17:17:28Z")
I have a problem when I try to control my robot using keyboard. The robot first takes so much time to response then when it responds, it lags and sometimes drives forward when I ask backward , sometimes it drives when I … --- ## [Stretch RE2 – Arm Not Extending & Gripper Not Closing (Broken 3D-Printed Parts)](https://forum.hello-robot.com/t/stretch-re2-arm-not-extending-gripper-not-closing-broken-3d-printed-parts/1481)
**Author:** [@Antara\_Shah](https://forum.hello-robot.com/u/Antara_Shah)\ **Replies:** 1\ **Last updated:** [April 9, 2026, 2:14am UTC](https://forum.hello-robot.com/t/stretch-re2-arm-not-extending-gripper-not-closing-broken-3d-printed-parts/1481 "2026-04-09T02:14:52Z")
Hi everyone, I’m having a couple of issues with our Stretch robot and wanted to ask for advice. The arm is stiff and won’t extend. When I opened it up, the 3D-printed bearings looked broken (photos attached). The grip… --- ## [Stretch AI throws error with Traceback](https://forum.hello-robot.com/t/stretch-ai-throws-error-with-traceback/1476)
**Author:** [@gregory\_sin](https://forum.hello-robot.com/u/gregory_sin)\ **Replies:** 4\ **Last updated:** [March 18, 2026, 7:27pm UTC](https://forum.hello-robot.com/t/stretch-ai-throws-error-with-traceback/1476 "2026-03-18T19:27:58Z")
Hello hello robot team, I followed the instructions for the Stretch AI setup using a GPU machine and docker image on the Stretch 3. After completing this and seeing the images streaming to the GPU machine, I attempt to … --- ## [Updating ROS with cpython compile error due to Numpy](https://forum.hello-robot.com/t/updating-ros-with-cpython-compile-error-due-to-numpy/1472)
**Author:** [@Tom\_Tan](https://forum.hello-robot.com/u/Tom_Tan)\ **Replies:** 6\ **Last updated:** [March 5, 2026, 6:07pm UTC](https://forum.hello-robot.com/t/updating-ros-with-cpython-compile-error-due-to-numpy/1472 "2026-03-05T18:07:16Z")
Hello, I am trying to update my ros workspace following this Updating your ROS Workspace - Stretch Docs . My Ubuntu is 22.04 LTS, and ROS is humble. After running the ./stretch\_update\_ros\_workspace.sh for a while, the u… --- ## [The robot is failing to detect the lift motor](https://forum.hello-robot.com/t/the-robot-is-failing-to-detect-the-lift-motor/1424)
**Author:** [@gabxap](https://forum.hello-robot.com/u/gabxap)\ **Replies:** 6\ **Last updated:** [March 2, 2026, 10:09pm UTC](https://forum.hello-robot.com/t/the-robot-is-failing-to-detect-the-lift-motor/1424 "2026-03-02T22:09:40Z")
Hello everyone! I’m running into an issue where the robot’s lift motor has suddenly stopped being detected by the system. The OS boots normally and all the other motors appear under their usual /dev/ttyACM\* device paths,… --- ## [NOCO Genius 10 switching off intermittently](https://forum.hello-robot.com/t/noco-genius-10-switching-off-intermittently/246)
**Author:** [@anurag](https://forum.hello-robot.com/u/anurag)\ **Replies:** 5\ **Last updated:** [March 2, 2026, 7:04pm UTC](https://forum.hello-robot.com/t/noco-genius-10-switching-off-intermittently/246 "2026-03-02T19:04:54Z")
Context I’ve been keeping the charger tethered on the SUPPLY mode while using Stretch, but this evening I started to hear an intermittent double beep sound suggesting that the battery voltage had dropped below the low… --- ## [Encoder calibration files missing](https://forum.hello-robot.com/t/encoder-calibration-files-missing/1461)
**Author:** [@ZachNobles](https://forum.hello-robot.com/u/ZachNobles)\ **Replies:** 4\ **Last updated:** [February 25, 2026, 5:51pm UTC](https://forum.hello-robot.com/t/encoder-calibration-files-missing/1461 "2026-02-25T17:51:40Z")
Hello, Recently, I ran the stretch diagnostic tool on our Stretch RE1 and got some errors related to missing encoder calibration files. stretch\_diagnostic\_check.py --simple The error for the right wheel is below: - t… --- ## [Adding new user params check Re2](https://forum.hello-robot.com/t/adding-new-user-params-check-re2/1457)
**Author:** [@allib](https://forum.hello-robot.com/u/allib)\ **Replies:** 2\ **Last updated:** [February 23, 2026, 6:49pm UTC](https://forum.hello-robot.com/t/adding-new-user-params-check-re2/1457 "2026-02-23T18:49:28Z")
I am trying to add a new user to my Stretch Re2 but keep receiving the following message when i run ./stretch\_new\_user\_install.sh ########################################### UPDATING USER SOFTWARE ######################… --- ## [THis error still happen](https://forum.hello-robot.com/t/this-error-still-happen/1459)
**Author:** [@Mallak\_Alqaisi](https://forum.hello-robot.com/u/Mallak_Alqaisi)\ **Replies:** 1\ **Last updated:** [February 13, 2026, 8:15pm UTC](https://forum.hello-robot.com/t/this-error-still-happen/1459 "2026-02-13T20:15:30Z")
(stretch\_ai) hcmtlab@hcmtlab-Alienware-Aurora-ACT1250:~/stretch\_ai$ python -m stretch.app.view\_images /home/hcmtlab/mamba/envs/stretch\_ai/bin/python: Error while finding module specification for ‘stretch.app.view\_images… --- ## [Stop code running](https://forum.hello-robot.com/t/stop-code-running/1458)
**Author:** [@Mallak\_Alqaisi](https://forum.hello-robot.com/u/Mallak_Alqaisi)\ **Replies:** 1\ **Last updated:** [February 12, 2026, 5:59pm UTC](https://forum.hello-robot.com/t/stop-code-running/1458 "2026-02-12T17:59:21Z")
when i want to stop code running in the terminal then click ctrl+c, i just got ^C and the code couldn’t stop ? --- ## [Stretch3 Funmap Error](https://forum.hello-robot.com/t/stretch3-funmap-error/1450)
**Author:** [@gregory\_sin](https://forum.hello-robot.com/u/gregory_sin)\ **Replies:** 4\ **Last updated:** [February 9, 2026, 9:21pm UTC](https://forum.hello-robot.com/t/stretch3-funmap-error/1450 "2026-02-09T21:21:31Z")
Hello hello robot team, I just started using the Stretch 3 robot. I was able to run the ROS2 lidar mapping and navigation demo without issue. When I attempted the Funmap demo, I received error messages and was not able … --- ## [Calibrate stretch robot](https://forum.hello-robot.com/t/calibrate-stretch-robot/1454)
**Author:** [@Mallak\_Alqaisi](https://forum.hello-robot.com/u/Mallak_Alqaisi)\ **Replies:** 1\ **Last updated:** [February 9, 2026, 8:55pm UTC](https://forum.hello-robot.com/t/calibrate-stretch-robot/1454 "2026-02-09T20:55:07Z")
Can anyone help me with the calibration of stretch robot ? --- ## [Stretch Not Starting-Up Properly](https://forum.hello-robot.com/t/stretch-not-starting-up-properly/323)
**Author:** [@matsumoto](https://forum.hello-robot.com/u/matsumoto)\ **Replies:** 17\ **Last updated:** [February 9, 2026, 7:39pm UTC](https://forum.hello-robot.com/t/stretch-not-starting-up-properly/323 "2026-02-09T19:39:57Z")
The Stretch was working well until today. However, now, when I turn on the Stretch with the main power switch, it appears to turn on (laser range finder spins, runstop light turns on). When I push the run stop, it beeps … --- ## [Install stretch\_ros in Docker](https://forum.hello-robot.com/t/install-stretch-ros-in-docker/1442)
**Author:** [@Jinyao\_Zhou](https://forum.hello-robot.com/u/Jinyao_Zhou)\ **Replies:** 5\ **Last updated:** [February 9, 2026, 6:56pm UTC](https://forum.hello-robot.com/t/install-stretch-ros-in-docker/1442 "2026-02-09T18:56:33Z")
Hey team! I’m wondering if you have an existing docker image with necessary libraries especially stretch\_ros built in? I’m trying to install it in a ubuntu 22.04 ros2 humble image, following this instruction: Updating yo… [Next page](https://forum.hello-robot.com/c/ask/5.md?page=1)