Yantian_Zha's profile - activity

I have 3 questions: First, what is the .urdf.xacro file? Second, how convert .urdf.xacro to .urdf, which can be visualized in Rviz? Third, whether there is other ways to visualize .urdf.xacro file? Thanks!

Hi all, I want to use actionlib to send gripping control cmd to gripper_controller(arbotix package), but after compiling I ran my node, and get strange info: "terminate called after throwing an instance of 'ros::InvalidNameException' what(): Using ~ names with NodeHandle methods is not allowed. If you want to use private names with the NodeHandle interface, construct a NodeHandle using a private name as its namespace. e.g. ros::NodeHandle nh("~"); nh.getParam("my_private_name"); (name = [~gripper_action]) Aborted (core dumped)"

I cannot change my code as the note's "nh.getParam("my_private_name")" because I need sentence like "GripperMoveClient ac("~gripper_action",true);" to define my client.

Pls help me, thanks! Below is my actionlib client code.

#include ros/ros.h>  //in order to show for you I //deliberately lose "<"

#include actionlib/client/simple_action_client.h>

#include control_msgs/GripperCommandAction.h>

typedef actionlib::SimpleActionClient<control_msgs::GripperCommandAction> GripperMoveClient;

int main(int argc, char** argv){

ros::init(argc, argv, "grasping_points_node");

GripperMoveClient ac("~gripper_action",true);

 while(!ac.waitForServer(ros::Duration(5.0))){

  ROS_INFO("Waiting...");}

  control_msgs::GripperCommandGoal goal;

  goal.command.position=0.01;

  ac.sendGoal(goal);

}

How to do Kinesthetic teaching on YuMi? Hello, I am writing to ask how to do Kinesthetic teaching on a YuMi robot (basi

How to do Kinesthetic teaching on ABB YuMi? Hello, I am writing to ask how to do Kinesthetic teaching on a YuMi robot (b

Hi all,

I have turtlebot2, groovy, turtlebot arm. In reading the tutorial Using urdf with robot_state_publisher, I'm confused in its launch file.

Why there are two "state_publishers" ?

one is "robot_state_publisher", and the other is "state_publisher")

By saying "need a method for specifying what state the robot is in" the tutorial points out the function of "state_publisher",

But in checking robot_state_publisher package we can see the function of robot_state_publisher is "allows you to publish the state of a robot to tf", which seems similar to the function of "state_publisher".

My goal is to broadcaster TF info, so my turtlebot arm can do grasping based on it(which have tf listening function). I have a URDF of turtlebot with arm.

Thanks for your help!

Groovy, Turtlebot2, Phantomx Pincher arm rosrun simple_arm_actions reset_arm_server.py:

Traceback (most recent call last): File "/home/turtlebot/exp1_ws/src/simple_arms/simple_arm_actions/bin/reset_arm_server.py", line 74, in <module> ResetArmServer() File "/home/turtlebot/exp1_ws/src/simple_arms/simple_arm_actions/bin/reset_arm_server.py", line 44, in __init__ self.joints = rospy.get_param("/simple_arms/joints") File "/opt/ros/groovy/lib/python2.7/dist-packages/rospy/client.py", line 452, in get_param return _param_server[param_name] #MasterProxy does all the magic for us File "/opt/ros/groovy/lib/python2.7/dist-packages/rospy/msproxy.py", line 117, in __getitem__ raise KeyError(key) KeyError: '/simple_arms/joints'

Can anyone give me some ideas? Thanks!

Hi all,

In reading the tutorial "http://wiki.ros.org/roscpp/Overview/Parameter%20Server", I'm confused in understanding "nh.getParam("/global_name", global_name)". Should I interpret it as "get "/global_name" from the parameter server, and put it in "global_name""? And the "/" means what?

Thanks!

Do you need to add rospy.Spin() below the subscriber line?

Hi all,

After running "rosrun rviz rviz", the rviz window shown up and then freezes? If you have met this before and know how to solve it, please let me know. The screenshot. Thanks!

I have already tried to reinstall the Rviz.

Hi all,

I'm trying to install ROS indigo at my mac (El Capitan). I have successfully run "rosdep install --from-paths src --ignore-src --rosdistro indigo -y --skip-keys gazebo", but met a problem when running "./src/catkin/bin/catkin_make_isolated --install -DCMAKE_BUILD_TYPE=Release", because of missing pcl_io library"

Here is the error: ld: library not found for -lpcl_io clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: * [/Users/yantian/ros_catkin_ws/devel_isolated/pcl_ros/lib/pcl_ros/convert_pointcloud_to_image] Error 1

make[1]: * [CMakeFiles/convert_pointcloud_to_image.dir/all] Error 2 make: * [all] Error 2 <== Failed to process package 'pcl_ros': Command '['/Users/yantian/ros_catkin_ws/install_isolated/env.sh', 'make', '-j8', '-l8']' returned non-zero exit status 2

Reproduce this error by running: ==> cd /Users/yantian/ros_catkin_ws/build_isolated/pcl_ros && /Users/yantian/ros_catkin_ws/install_isolated/env.sh make -j8 -l8

Command failed, exiting.

Thanks in advance!

I'm facing the same problem.

Hi all,

Here is the link to my question: https://github.com/wg-perception/line...

Thanks in advance!

Have you solved it? I met the same problem. Thanks!

Hi, I met a problem when using your files. Here is the problem link. Thanks very much!

Hi,

I'm using ROS indigo with two kinects. I have configued openni_camera and the launch file of using two kinects.

However, different from the feasible usage example above, I met problems when launching the multi_kinect launch file. The three files I used: (file1, file2, file3) are the same with those in the link.

The problem:

But I can roslaunch each of the Kinect with freenect.launch.

Thanks very much!

Could you let me know how you solved the problem? Thanks!