Control and follow-up of the robotic arm

1 Slider Control

Open a command line and run:

  • mycobot 280-M5 version:
# The default serial port name of mycobot 280-M5 version is "/dev/ttyUSB0", and the baud rate is 115200. The serial port name of some models is "dev/ttyACM0". If the default serial port name is wrong, you can change the serial port name to " /dev/ttyACM0".
ros2 launch mycobot_280 slider_control.launch.py
  • mycobot 280-PI version:
# The default serial port name of mycobot 280-PI version is "/dev/ttyAMA0", and the baud rate is 1000000. 
ros2 launch mycobot_280pi slider_control.launch.py

It will open rviz and a slider component and you will see something like this:

Then you can control the movement of the model in rviz by dragging the slider . If you want the real mycobot to move with it, you need to open another command line and run:

  • mycobot 280-M5 version:
# The default serial port name of mycobot 280-M5 version is "/dev/ttyUSB0", and the baud rate is 115200. The serial port name of some models is "dev/ttyACM0". If the default serial port name is wrong, you can change the serial port name to " /dev/ttyACM0".
ros2 run mycobot_280 slider_control
  • mycobot 280-PI version:
# The default serial port name of mycobot 280-PI version is "/dev/ttyAMA0", and the baud rate is 1000000.
ros2 run mycobot_280pi slider_control

Please note: Since the robot arm will move to the current position of the model when the command is input, please make sure that the model in rviz does not appear to be worn out before you use the command Do not quickly drag the slider after connecting the robotic arm to prevent damage to the robotic arm

2 Model Follow

In addition to the above controls, we can also make the model follow the movement of the real robotic arm . Open a command line and run:

  • mycobot 280-M5 version:

    # The default serial port name of mycobot 280-M5 version is "/dev/ttyUSB0", and the baud rate is 115200. The serial port name of some models is "dev/ttyACM0". If the default serial port name is wrong, you can change the serial port name to " /dev/ttyACM0".
    ros2 launch mycobot_280 mycobot_follow.launch.py
    
  • mycobot 280-PI version:

    # The default serial port name of mycobot 280-PI version is "/dev/ttyAMA0", and the baud rate is 1000000.
    ros2 launch mycobot_280pi mycobot_follow.launch.py
    

Then open another command line and run:

  • mycobot 280-M5 version:

    ros2 run mycobot_280 follow_display
    
  • mycobot 280-PI version:

    ros2 run mycobot_280pi follow_display
    

    It will open rviz to show the model following effect .

3 GUI Control

On the basis of the previous, this package also provides a simple GUI control interface . This method means that the real robotic arms are linked with each other, please connect to mycobot.

Open the command line::

  • mycobot 280-M5 version:

    # The default serial port name of mycobot 280-M5 version is "/dev/ttyUSB0", and the baud rate is 115200. The serial port name of some models is "dev/ttyACM0". If the default serial port name is wrong, you can change the serial port name to " /dev/ttyACM0".
    ros2 launch mycobot_280 simple_gui.launch.py
    
  • mycobot 280-PI version:

    # The default serial port name of mycobot 280-PI version is "/dev/ttyAMA0", and the baud rate is 1000000. 
    ros2 launch mycobot_280pi simple_gui.launch.py
    

4 Keyboard Control

The function of keyboard control is added in the package of mycobot_280, and it is synchronized in real time in rviz. This function relies on pythonApi, so make sure to connect with the real robotic arm.

Open a command line and run:

  • mycobot 280-M5 version:
# The default serial port name of mycobot 280-M5 version is "/dev/ttyUSB0", and the baud rate is 115200. The serial port name of some models is "dev/ttyACM0". If the default serial port name is wrong, you can change the serial port name to " /dev/ttyACM0".
ros2 launch mycobot_280 teleop_keyboard.launch.py
  • mycobot 280-PI version:
# The default serial port name of mycobot 280-PI version is "/dev/ttyAMA0", and the baud rate is 1000000.
ros2 launch mycobot_280pi teleop_keyboard.launch.py

The operation effect is as follows:

The command line will output mycobot information, as follows:

[INFO] [launch]: All log files can be found below /home/elephant/.ros/log/2022-05-19-16-25-45-949761-elephant-virtual-machine-19111
[INFO] [launch]: Default logging verbosity is set to INFO
[INFO] [robot_state_publisher-1]: process started with pid [19114]
[INFO] [rviz2-2]: process started with pid [19116]
[INFO] [follow_display-3]: process started with pid [19118]
[robot_state_publisher-1] Parsing robot urdf xml string.
[robot_state_publisher-1] Link joint2 had 1 children
[robot_state_publisher-1] Link joint3 had 1 children
[robot_state_publisher-1] Link joint4 had 1 children
[robot_state_publisher-1] Link joint5 had 1 children
[robot_state_publisher-1] Link joint6 had 1 children
[robot_state_publisher-1] Link joint6_flange had 0 children
[robot_state_publisher-1] [INFO] [1652948746.290904045] [robot_state_publisher]: got segment joint1
[robot_state_publisher-1] [INFO] [1652948746.290967253] [robot_state_publisher]: got segment joint2
[robot_state_publisher-1] [INFO] [1652948746.290973124] [robot_state_publisher]: got segment joint3
[robot_state_publisher-1] [INFO] [1652948746.290977490] [robot_state_publisher]: got segment joint4
[robot_state_publisher-1] [INFO] [1652948746.290981670] [robot_state_publisher]: got segment joint5
[robot_state_publisher-1] [INFO] [1652948746.290985737] [robot_state_publisher]: got segment joint6
[robot_state_publisher-1] [INFO] [1652948746.290989943] [robot_state_publisher]: got segment joint6_flange
[follow_display-3] [INFO] [1652948746.664601707] [follow_display]: port:/dev/ttyUSB0, baud:115200
[rviz2-2] [INFO] [1652948746.828773551] [rviz2]: Stereo is NOT SUPPORTED
[rviz2-2] [INFO] [1652948746.830452458] [rviz2]: OpenGl version: 4.1 (GLSL 4.1)
[rviz2-2] [INFO] [1652948746.874021926] [rviz2]: Stereo is NOT SUPPORTED
[rviz2-2] Parsing robot urdf xml string.

Next, open another command line and run:

  • mycobot 280-M5 version:
ros2 run mycobot_280 teleop_keyboard
  • mycobot 280-PI version:
ros2 run mycobot_280pi teleop_keyboard

You will see the following output on the command line:

Mycobot Teleop Keyboard Controller
---------------------------
Movimg options(control coordinations [x,y,z,rx,ry,rz]):
              w(x+)

    a(y-)     s(x-)     d(y+)

    z(z-) x(z+)

u(rx+)   i(ry+)   o(rz+)
j(rx-)   k(ry-)   l(rz-)

Gripper control:
    g - open
    h - close

Other:
    1 - Go to init pose
    2 - Go to home pose
    3 - Resave home pose
    q - Quit

currently:    speed: 10    change percent: 2

In this terminal, you can control the state of the robot arm and move the robot arm through the keys in the command line.

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