added how to build a new ur_robotiq.urdf

README.md

@@ -31,8 +31,14 @@ To download this repository and all of its included submodules, follow these ste
       ```bash
       cd UR-Robotiq
       ```
-   * Run the following command to start the Docker Compose:
-      ```bash 
-      docker-compose up -d 
-      ```
+     
+   * When using the "ur_robotiq.urdf" file first run
+     ```bash
+     cd /ros2_ws/src/ur_robotiq_description/urdf
+     ros2 run xacro xacro ur_robotiq.urdf.xacro > ur_robotiq.urdf
+     ```
+   * Run the following command to start the Docker Compose:
+       ```bash 
+       docker-compose up -d 
+       ```