# Running Straight

Competition Name: Running Straight

Submitted By: Gary Reynolds, Physics Instructor at Santa Ana High School, Santa Ana, CA

### Materials:

• Boe-Bot, Shield-Bot, or a similar robot that does not use encoders on its wheels
• 36-inch long 1x6” or 2x6” Board (can use tape on the floor or a wall instead)
• 2 (two) small plastic cones (can use cardboard tubes instead)

### Objective:

Your robot must drive as straight as possible and stop at the board. This is a test of how well you can tune your robot’s servo/drive motors.

### Rules:

• Because this game tests participant’s ability to carefully program the servos or drive motors on their robots, the robots in this game must have:
• Independently programmable drive motors or servos
• No wheel or motor encoders
• Collision detection that causes them to stop when the end of the course is reached.
• A mark is placed on the center front of the robot to clearly show the score it receives when it reached the wall at the end of the course

• The course consists of a flat floor or table space that is at least 6 ft. long by 3 ft. wide
• A 3 ft. board is marked with 9 (nine) 4-inch wide boxes and labeled as shown in the drawing below. The center box is labeled with a “5”.
• Tape or similar labeling can be used on a wall or on the floor instead of a board.
• Two cones are placed 1 ft. apart in the center of the course for the robot to travel through on its way to the board at the end of the course.
• Cardboard tubes could be used instead of cones

• Upon turning on the robot, it should try to drive in a straight line through the cones and stop at the board at the end of the course.
• It should be decided ahead of the time if the competition will be:
• A single run for each robot,
• Multiple runs with an average or total score,
• Or multiple runs with the best score

Scoring:

• 5 pts.: passing through the cones without hitting them
• 1-5 pts.: score from hitting the board at the end of the course

### Variations:

When the robot touches the board at the end, it could be programmed to turn around and come back through the cones