Robot Kolunun Programlanması - Python

• This exploration will introduce students to basic programming of the V5 Clawbot's Arm Motor. 
• Learning to program the Arm Motor enables students to properly control the V5 Clawbot's arm movements. For more information about the instructions used in a Python project, visit the help information for VEXcode V5 Python.

Autocomplete is a feature in VEXcode V5 that predicts the rest of the command you are typing. As students are working in VEXcode V5, encourage them to use the Autocomplete feature to help with the Python syntax. You may notice an autocomplete function as you start to type the instruction. Use your “Up” and “Down” keys to select the name you want, then press “Tab'' or (Enter/Return) on your keyboard to make the selection. For more information on this feature check out the Python article.

Model each of the troubleshooting steps for the students.

• Since this is a beginning activity with programming, the teacher should model the steps, and then ask the students to complete the same actions. The teacher should then monitor the students to ensure that they are following the steps correctly.
• Make sure that the students have selected Open Examples from the File menu.
• Make sure that the students have selected the Clawbot and Advanced TrainingBot (Drivetrain 2-motor, No Gyro) example project.

          You can point out to the students that there are several selections to pick from on the Examples page. As they build and use other robots, they will have a chance to use different templates.

• You can ask students to add their initials or the name of their group to the project name. This will help differentiate the projects if you ask the students to submit them.

• Point out that when they first opened VEXcode V5, the window was labeled VEXcode Project. VEXcode Project is the default project name when VEXcode V5 is first opened. Once the project was renamed and saved, the display was updated to show the new project name. Using this window in the toolbar, it is easy to check that the students are using the correct project.
• Tell the students that they are now ready to begin their first project. Explain to the students that by just following a few simple steps, they will be able to create and run a project that will raise and lower the Clawbot's arm.
• Remind students to save their projects as they work. The articles in the Python section of the VEX Library explains saving practices in VEXcode V5.

This is a good point to pause and have the student groups review the steps that were just completed on starting a new project in VEXcode V5.

If the students are using a computer, ask them now to disconnect the USB cable from the Robot Brain. Having the robot connected to a computer while running a project could cause the robot to pull on the connection cable.

Model running the project in front of the class before having all of the students try at once. Gather the students in one area and leave enough room for the Clawbot to move its arm. Demonstrate how to end the project and have the Clawbot's arm lower back to its resting position.

Tell the students it is now their turn to run their projects. Make sure that they have adequate space to safely have the Clawbot's arm raised.
 

The solution to the challenge is below. To lower the arm, students needed to change the “FORWARD” parameter to “REVERSE” in the arm_motor.spin_for() command that was added.

# Begin project code
arm_motor.set_position(0, DEGREES)
arm_motor.spin_for(FORWARD, 90, DEGREES)
wait(2, SECONDS)
arm_motor.spin_for(REVERSE, 90, DEGREES)

Most of the commands within this challenge are arm_motor.spin_for(). After adding a command for moving the arm upward, and one for moving the arm downward, you can highlight the two commands, right-click, and then choose to copy and paste them as many times as needed. Then the parameters can be changed to meet the challenge and wait commands can be added between.

• Review an example Flight Traffic Controller Challenge solution here: 

# Begin project code
arm_motor.set_position(0, DEGREES)
arm_motor.spin_for(FORWARD, 90, DEGREES)
arm_motor.spin_for(REVERSE, 90, DEGREES)
wait(3, SECONDS)
arm_motor.spin_for(FORWARD, 45, DEGREES)
arm_motor.spin_for(REVERSE, 45, DEGREES)
arm_motor.spin_for(FORWARD, 45, DEGREES)
arm_motor.spin_for(REVERSE, 45, DEGREES)
wait(5, SECONDS)
arm_motor.spin_for(FORWARD, 90, DEGREES)
arm_motor.spin_for(REVERSE, 90, DEGREES)
arm_motor.spin_for(FORWARD, 90, DEGREES)
arm_motor.spin_for(REVERSE, 90, DEGREES)
arm_motor.spin_for(FORWARD, 90, DEGREES)
arm_motor.spin_for(REVERSE, 90, DEGREES)

More advanced students might use loops to simplify the solution.

# Begin project code
arm_motor.set_position(0, DEGREES)
arm_motor.spin_for(FORWARD, 90, DEGREES)
arm_motor.spin_for(REVERSE, 90, DEGREES)
wait(3, SECONDS)
for repeat_count in range(2): 
    arm_motor.spin_for(FORWARD, 45, DEGREES)
    arm_motor.spin_for(REVERSE, 45, DEGREES)
wait(5, SECONDS)
for repeat_count in range(3):
    arm_motor.spin_for(FORWARD, 90, DEGREES)
    arm_motor.spin_for(REVERSE, 90, DEGREES)

• Programming Rubric (Google Doc / .docx / .pdf )