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Questions tagged [joint-states]

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Could not load controller 'joint_states_controller'

I am trying to implement a simple joint position and state controller on my robot, but i keep running into this error, I have reviewed similar questions and answers, but none suit my error, below i ...
Avinaash Manivelan's user avatar
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1 answer
101 views

Problem with /joint_states: "New joint state is not newer than the previous state" warn

i'm using Gazebo and MoveIt with an Arduino Tinkerkit Braccio, when I launch the simulation I get a bunch of this warning messages ...
caesar753's user avatar
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1 answer
201 views

How do you send positions in joint_states topic if there's already default positions being published?

By default joint_state_publisher publishes a message with all joints and default positions to the joint_states topic. What is ...
Yato's user avatar
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1 answer
30 views

How to get joint velocity from Moveit 2 Robot State?

Is it possible to get the velocity of each joint using Moveit 2 Robot State? Is there any better approach? I tried the following: ...
user avatar
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1 answer
5 views

Graphical tool to check controller performance (MoveIt, ros_control)?

Hi, is there a graphical tool to plot current joint_states vs desired joint states which are output by moveit? I want to visually evaluate the performance of the hardware controller / check if my ...
user avatar
0 votes
2 answers
60 views

Is there a way to extract specific info or lines from a ROS topic?

echo /joint_states has the following output (shortened). I made a node (using the rospy tutorial) to subscribe to /joint_states and I want the.py script to print() just the position list for use ...
user avatar
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1 answer
14 views

universal robot publishes joint_states in wrong order

Hi I am simulating a UR3e with universal_robot in gazebo. I changed in the file universal_robot/ur_gazebo/arm_controller_ur3.yaml the arm_controller to effort_controllers/JointTrajectoryController ...
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0 votes
1 answer
56 views

joint_state_controller in ros_control

Hi, I'm currently using ROS Kinetic on Ubuntu 16.04, and am in the process of implementing ros_control on my robot. My question is as follows: My custom robot driver node currently publishes joint ...
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1 answer
20 views

have send tf data from multiple robot in rviz

ROS Kinetic: I am using 2 robot and I am not sure how to display in in rviz with amcl. What I have is each robot has its own tf. I would do ...
user avatar
0 votes
1 answer
20 views

Usage of joint_state_publisher

Hi everyone, I am working with a new UR10e robot and a 2F-140 Robotiq Gripper. And the new models of UR robot comes with a set of script functions to control the gripper. The thing is that working ...
user avatar
0 votes
1 answer
6 views

Failed to initialize joint_names. Aborting

Hello, i am using the staubli industrial robot driver. In the past it was working perfectly fine but this morning I got the following error message, when I tried launching the driver: ...
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1 answer
11 views

ABB: S4C + IRB6650: How do I visualize an ABB robot's movements in Rviz

Forgive me, I am pretty new to ROS, so please excuse any gaps in my knowledge. I have a wireless ESP8266 microcontroller reading joint_state data from an ABB robot through serial connection and it is ...
user avatar
0 votes
1 answer
32 views

robot_state_publisher design: multiple publishers on /joint_states ok?

Is robot_state_publisher designed to handle multiple sources of /joint_state information? For example, let's say I have the R2D2-like robot from this tutorial. If I have one node publishing the state ...
Rick's user avatar
  • 249
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1 answer
4 views

how can i write a node to subscribe to the “joint 0”?

I used a 6-DOF Arms of a Mobile Robot in the topic "joint_state" three are messages of joint0 joint1 joint2.。。。joint6 how can I write a node subscribe to joint 0; only “ joint 0” ...
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1 answer
2 views

what is a number in joint_states/positions[2] in rqt?

hi . For show plot of my robot I want use joint_states/positions[2]. what is 2 in command? The two refers to the third joint in URDF ? Originally posted by zakizadeh on ROS Answers with karma: 217 on ...
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1 answer
45 views

why cannot use tf::Quaternion and tf::createQuaternionMsgfromYaw in arduino

I try to use tf::Quaternion and tf::createQuaternionMsgfromYaw in arduino I have included ros.h and tf/transform_broadcaster.h but when I build the code in arduino ide , it shows error: ...
user avatar
0 votes
1 answer
12 views

joint_states messages different

Hello, I have a custom 6DOF arm that I'm trying to interface with moveit. I have created the URDF and the model, and I have loaded it into rviz. I have made a lot of progress with it I think. I'm ...
user avatar
0 votes
1 answer
29 views

[RESOLVED] Arduino subscribe to joint_states

Hello, I have connected my custom built robot arm to my arduino using adafruit PWM. I have tested subscribing to a simple UInt16 topic and manually publishing a message to move a servo. It works. Now ...
user avatar
0 votes
1 answer
12 views

Different starting positions in Rviz and Gazebo

I have made my own UR5 config pkg using Setup Assistant since I want to understand the whole process inside out. I am able to plan paths in Rviz. Initially I had problems loading the controllers (<...
user avatar
0 votes
1 answer
4 views

How to handle "Schunk LWA4P joint angle's origin changes on Robot On/OFF"?

I tried a pick and place application developed in ROS with Schunk LWA4P robotic arm. Initially it worked fine completely. Even when I shut down the robot at positions apart from home (all angles 0 ...
user avatar
0 votes
1 answer
3 views

ROS urdf for Moveit!

Hi there! I am currently working on a project, i am using servo motors to build a robotic arm. The arm is aligned vertically, the gripper points to the sky. In the joint description i wrote (urdf): <...
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0 votes
1 answer
15 views

How to make rviz model follow joint states with MoveIt?

Hello everyone, I have the following problem: I successfully configured moveit for my robot. Now I want my rviz visualization to follow the robot movement, hence when the robot moves, it shoult move ...
user avatar
0 votes
1 answer
7 views

Change type sensor_msgs/joint_states to JointMessage

Hello! My Node is subscribing to a ROS-Node that publishes sensor_msgs/joint_state. Now I would like to send this data via the simple_message Protocol using TCP/IP to my robot controller. My goal is ...
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0 votes
1 answer
22 views

rviz and moveit_msgs/DisplayRobotState problem

I'm running a simple arm with ros indigo. Moveit kind of works, but I'm not able to visualise the real robot movement when moveit is running. I get the following warning: [WARN] [WallTime: ...
user avatar
0 votes
1 answer
5 views

Where is the Joint State information in a Create Turtlebot supposed to come from?

I am hacking at the Create based TurtleBot code to operate my own robot using ROS Hydro. I have created my own URDF modifications and some code changes. If I run: ...
user avatar
0 votes
2 answers
43 views

sensor_msgs/JointState on Arduino

Hi all, I've got maybe a very noob question. I'm using rosserial on a Arduino One board and I'm trying to stream out the readings from wheel encoders as a sensor_msgs/JointState data structure. The ...
user avatar
0 votes
1 answer
1 view

Segfault whilst reading message

Hi we've been writting some code to subscribe to the /joint_states topic produced by the husky simulator. However we found that even though all the arrays in /joint_states should be the same length, ...
user avatar
0 votes
2 answers
9 views

gazebo joint effort accumulation

Hi all, According to this all active efforts applied to the same joint are cumulative. However, why don't I see the effort field of joint_states message, which is published by controller_manager, gets ...
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0 votes
1 answer
3 views

syntax error near unexpected token `'joint_states listener''

In this tutorial - http://wiki.ros.org/pr2_controllers/Tutorials/Getting%20the%20current%20joint%20angles I was trying to run the service node for getting the current joint angles but the screen shows ...
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0 votes
1 answer
2 views

2 nodes publishing on same topic - merge?

Hello, I have a robot description (urdf file) where the joint state publisher is publishing for all the non-fixed joints a message. I have 4 such joints which are published on topic /joint_states. But ...
user avatar
0 votes
1 answer
5 views

JointTrajectoryAction position vs /joint_state positions

I'm trying to replay a saved trajectory by using the joint_states positions and JointTrajectoryAction. However, for some of the joints (upper arm roll), the /joint_state accumulates all the movement, ...
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0 votes
1 answer
16 views

Controlling joints in Gazebo

Hi everyone I am new to ROS and Gazebo and I got problems into using the joint_state_publisher package. I have a robot with multiple non-fixed joints. I created 2 launch files : one to display the ...
user avatar
0 votes
1 answer
23 views

Getting joint state value given joint name in C++

Let's say the /joint_states topic published by joint_state_publisher has several joint states: ...
user avatar
0 votes
1 answer
2 views

How to update URDF character joint state using openni_tracker

I am trying to develop a simple kinect demo that consists in standing in front of a kinect and after that, start control the movents of a simple URDF character. To do that, I planned to subscribe to ...
user avatar
0 votes
1 answer
2 views

Joint does not stop sliding

Hi, I have created a model of the sliding door in gazebo. This is the code: ...
user avatar
0 votes
2 answers
10 views

robot_state_publisher tf missing frames

I currently have a node publishing /joint_states messages with a urdf loaded to the param server. When running the robot_state_publisher, I get the following output: (snapshot of ~88 Hz published ...
user avatar
0 votes
1 answer
9 views

nao_driver and joint_states with NaoQI 1.12

Hi, I am using NaoQi 1.12 and the stable ROS Electric version. It is all running fine, except the joint_states which are published by the nao_driver node. I am able to publish new joint values which ...
user avatar