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Starting the EtherCAT Hand

Description: How to start the etherCAT Hand ROS driver.

Tutorial Level: BEGINNER

Next Tutorial: To learn how to start the controllers: Starting a set of controllers

Compiling

You need to compile the necessary packages (make sure you get sr_external_dependencies installed before):

$ rosmake --rosdep-install sr_edc_ethercat_drivers sr_mechanism_controllers sr_robot_lib

If you want to be able to run the (deprecated) compatibility interface for the hand:

$ ETHERCAT=1 rosmake sr_hand

You can also compile the interface to publish additional data (such as the (almost) raw incoming etherCAT packet):

$ DEBUG=1 rosmake sr_edc_ethercat_drivers sr_mechanism_controllers sr_robot_lib

Configure the interface

You have to determine on which ethernet port the hand is connected and set this up in the sr_config/bashrc/env_variables.bashrc file. There should be a default "eth1" that you need to change to your interface name.

Starting the interface

It's good practice to first start your roscore and a few utilities:

$ xterm -e roscore & rxconsole & rosrun robot_monitor robot_monitor &

To start the etherCAT Hand ROS driver, you need to run the following command as root:

# roslaunch sr_edc_launch sr_edc.launch

Visualizing the robot

You can use rviz to visualize the robot, using the robot_model plugin.

Compatibility Interface

This interface is useful if you already have some code running on top of the sr_hand interface (for the CAN version of the Hand). It just wraps this interface so that you have access to the same topics as with the sr_hand interface. This compatibility interface is marked as deprecated as you loose some processing power when using it.

To run it, once you've started the EtherCAT Hand ROS driver as specified above, you just need to start the compatibility interface with the command:

$ roslaunch sr_hand srh_etherCAT.launch

2019-10-19 13:14