allow to set max_velocity from launch file

ur_bringup/launch/ur_common.launch

@@ -16,6 +16,9 @@
   <arg name="min_payload"/>
   <arg name="max_payload"/>
   
+  <!-- The max_velocity parameter is only used for debugging in the ur_driver. It's not related to actual velocity limits -->
+  <arg name="max_velocity" default="10.0"/> <!-- [rad/s] -->
+  
   <!-- copy the specified IP address to be consistant with ROS-Industrial spec.
   NOTE: The ip address is actually passed to the driver on the command line -->
   <param name="/robot_ip_address" type="str" value="$(arg robot_ip)"/>
@@ -27,6 +30,7 @@
   <node name="ur_driver" pkg="ur_driver" type="driver.py" args="$(arg robot_ip) $(arg reverse_port)" output="screen">
     <param name="min_payload" type="double" value="$(arg min_payload)"/>
     <param name="max_payload" type="double" value="$(arg max_payload)"/>
+    <param name="max_velocity" type="double" value="$(arg max_velocity)"/>
   </node>
    
   <!-- TF Buffer Server -->