Tutorial 8: Completing a kitting task

This tutorial details the steps necessary to complete a kitting task.

Starting the environment for Tutorial 8

To start the environment, use this command:

ros2 launch ariac_gazebo ariac.launch.py competitor_pkg:=ariac_tutorials trial_name:=tutorial dev_mode:=True

Running tutorial 8

To start tutorial 8, open a new terminal and use this command:

ros2 launch ariac_tutorials tutorial.launch.py tutorial:=8

Code explanation for Tutorial 8

This is the node used for tutorial 8. The functions from competition_interface.py which are used are highlighted.

Listing 27 tutorial_8.py

#!/usr/bin/env python3

import rclpy
import threading
from rclpy.executors import MultiThreadedExecutor
from ariac_msgs.msg import Order as OrderMsg, KittingTask as KT
from ariac_tutorials.competition_interface import CompetitionInterface


def main(args=None):
    rclpy.init(args=args)
    interface = CompetitionInterface()
    executor = MultiThreadedExecutor()
    executor.add_node(interface)

    spin_thread = threading.Thread(target=executor.spin)
    spin_thread.start()

    interface.start_competition()

    interface.complete_orders()

    interface.end_competition()
    interface.destroy_node()
    rclpy.shutdown()


if __name__ == '__main__':
    main()

The purpose of this tutorial is to complete a kitting order, which is done using interface.complete_orders. Inside of this function, the objects like bins, assembly stations, kitting tray stations, and the conveyor belt are added to the planning scene using interface.add_objects_to_planning_scene. Then, while the competition is active, the orders are looped through until a kitting order is found, where it is passed into interface._complete_kitting_order. The first step of completing a kitting order is picking and placing the correct tray onto the correct agv. Then, the parts in the kitting order are looped through and the robot picks each part and places it on the kitting tray. After all of the parts are on the kitting tray, the AGV moves to the warehouse and the order is submitted.