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2013-01-29 07:49:18 -0500 received badge  Famous Question (source)
2013-01-29 05:14:53 -0500 commented answer How to write program for control robot arm?

I need more details about in a beginner level for control forward kinematic of robot arm following the joint variables and I should write PID control in hardware node or other or not?

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2013-01-14 17:31:44 -0500 asked a question How to write program for control robot arm?

I need help about step by step to write a program from first to last, ROS packages for used in this application so that specify the position of robot arm.

ex.

  1. Write a program for control hardware (Motor Control) Node.
  2. Use joint_state_publisher to ....blah blah blah ...........
  3. ....................................................................................

I need more details about in a beginner level for control forward kinematic of robot arm following the joint variables and I should write PID control in hardware node or other or not?

Thank you for all answers

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2012-10-23 07:11:32 -0500 commented answer Problem with launch file in using urdf with robot_state_publisher tutorial

Thank you very much.

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2012-10-23 00:47:30 -0500 asked a question Problem with launch file in using urdf with robot_state_publisher tutorial

I'm trying to run topic five of this tutorial but I've a problem with rviz can't work probably.

My roswtf result (with launch file name:state_publisher.launch):


Loaded plugin tf.tfwtf
================================================================================
Static checks summary:

Found 1 error(s).

ERROR The following packages have rpath issues in manifest.xml:
* r2d2: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* rosconsole: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* roscpp: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* std_msgs: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* sensor_msgs: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* tf: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* rostest: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* geometry_msgs: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"
* message_filters: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"

================================================================================

ROS Master does not appear to be running.
Online graph checks will not be run.
ROS_MASTER_URI is [http://localhost:11311]

roslaunch state_publisher.launch result:

... logging to /home/kitsadapon/.ros/log/3c4387b8-1d12-11e2-82ee-00238b609800/roslaunch-kitsadapon-Joybook-S42-23393.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://kitsadapon-Joybook-S42:41110/

SUMMARY
========

PARAMETERS
 * /robot_description
 * /rosdistro
 * /rosversion

NODES
  /
    robot_state_publisher (robot_state_publisher/state_publisher)
    state_publisher (r2d2/state_publisher)

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [23410]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to 3c4387b8-1d12-11e2-82ee-00238b609800
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [23423]
started core service [/rosout]
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[robot_state_publisher-2]: started with pid [23435]
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[state_publisher-3]: started with pid [23452]

Tutorial link: http://www.ros.org/wiki/urdf/Tutorials/Using%20urdf%20with%20robot_state_publisher


Problems with rviz:

  • Global Status Error: Fix Frame [/map] does not exist
  • Robot Model Status Error: No Transform
  • TF Status Warning: NoTransform

Thank you for all answers.

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2012-08-29 11:25:32 -0500 commented question Segmentation fault on running rxconsole

Thank You for all answers. I've tried 2 times about my configuring of ROS Environment and ROS Workspace and I've found my mistake about Overlays with rosws procedure. Now I can do it.

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2012-08-28 23:58:06 -0500 commented question Segmentation fault on running rxconsole

I'm following this >roscore new terminal >rxconsole

2012-08-28 23:34:42 -0500 asked a question Segmentation fault on running rxconsole

I'am trying to run rxconsole in this tutorial ttp://www.ros.org/wiki/ROS/Tutorials/UsingRxconsoleRoslaunch.

When I run rxconsole command, I get a message "Segmentation fault (core dumped)".

I'm using Fuerte.

roscore Result:

kitsadapon@kitsadapon-Joybook-S42:~$ roscore
... logging to /home/kitsadapon/.ros/log/94e99e38-f1c1-11e1-aab5-00216a1612d4/roslaunch-kitsadapon-Joybook-S42-10854.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://kitsadapon-Joybook-S42:56657/
ros_comm version 1.8.10

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion

NODES

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [10870]
ROS_MASTER_URI=http://kitsadapon-Joybook-S42:11311/

setting /run_id to 94e99e38-f1c1-11e1-aab5-00216a1612d4
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [10883]
started core service [/rosout]

The command I use to run rxconsole following this:


  • new terminal window

$ rosdep install rxtools turtlesim

$ rosmake rxtools turtlesim

  • new terminal window

$ roscore

  • new terminal window

$ rxconsole

segmentation fault (core dump)


Thankyou