palmlster's profile - activity

I am having the same kind of error.

One solution could be to increase the constant distance values in here from 0.5 to 1.0 .

I think this is due to missing potential values on cells around the start of the path, see this picture

The white space under the axes represents cells to which no potential was assigned. Sometimes the cell (nx,ny) is far more than 0.5 (m?) from start cell in here, therefore the path extraction will return false (exit from the while loop).

What do you think?

Best,

L.

how can I implement a reactive control for a manipulator??? Is there any tutorial or any suggestion??

hi everyone!! I'm doing the tutorial in pr2_mechanism section (http://www.ros.org/wiki/pr2_mechanism/Tutorials/Running%20a%20realtime%20joint%20controller): Running a real time controller, i followed every single step but i get the following problems when i try to load the controller.. any suggestions?

luigi@luigi-pc:~$ rosrun pr2_controller_manager pr2_controller_manager list-types ethercat_trigger_controllers/MultiTriggerController ethercat_trigger_controllers/ProjectorController ethercat_trigger_controllers/TriggerController my_controller_pkg/MyControllerPlugin pr2_calibration_controllers/CasterCalibrationController pr2_calibration_controllers/FakeCalibrationController pr2_calibration_controllers/GripperCalibrationController pr2_calibration_controllers/JointCalibrationController pr2_calibration_controllers/WristCalibrationController pr2_controller_manager/TestController pr2_mechanism_controllers/CasterController pr2_mechanism_controllers/CasterControllerNode pr2_mechanism_controllers/LaserScannerTrajController pr2_mechanism_controllers/Pr2BaseController pr2_mechanism_controllers/Pr2BaseController2 pr2_mechanism_controllers/Pr2GripperController pr2_mechanism_controllers/Pr2Odometry robot_mechanism_controllers/CartesianPoseController robot_mechanism_controllers/CartesianTwistController robot_mechanism_controllers/CartesianWrenchController robot_mechanism_controllers/JTCartesianController robot_mechanism_controllers/JointEffortController robot_mechanism_controllers/JointPositionController robot_mechanism_controllers/JointSplineTrajectoryController robot_mechanism_controllers/JointTrajectoryActionController robot_mechanism_controllers/JointVelocityController youbot_description/CartesianComplianceController youbot_description/JointPositionController youbot_description/JointVelocityController youbot_description/YouBotUniversalController luigi@luigi-pc:~$ rosrun pr2_controller_manager pr2_controller_manager load my_controller_pkg Error when loading my_controller_name

Thank you in advance

Luigi

in that page you can find the used code :)

https://sites.google.com/site/palmlster/home/code

yes Lorenz, here it is :

hi everyone, when I'm trying to do the tutorial in http://www.ros.org/wiki/ROS/Tutorials/WritingPublisherSubscriber%28python%29 , I have a problem when I try to execute

rosrun beginner_tutorials talker.py

The error message is :

luigi@luigi-pc:~/ros_workspace/beginner_tutorials$ rosrun beginner_tutorials talker.py
Traceback (most recent call last):
  File "/home/luigi/ros_workspace/beginner_tutorials/nodes/talker.py", line 11, in <module>
    str = "hello world %s"%rospy.get_time()
  File "/opt/ros/electric/stacks/ros_comm/clients/rospy/src/rospy/rostime.py", line 222, in get_time
    return Time.now().to_sec()
  File "/opt/ros/electric/stacks/ros_comm/clients/rospy/src/rospy/rostime.py", line 150, in now
    raise rospy.exceptions.ROSInitException("time is not initialized. Have you called init_node()?")
rospy.exceptions.ROSInitException: time is not initialized. Have you called init_node()?

Anyone Can help me??

Thank you in advance

Luigi