Instructional Material: Using Encoders Quiz

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1. What is an encoder? How does it work?

 

 

2. There are three main settings for encoders. Briefly explain what each does (which is running at a set speed, which is running at a set power?)

motor.setmode(DcMotor.RunMode.RUN_TO_POSITION);

 

motor.setmode(DcMotor.RunMode.RUN_USING_ENCODER);

 

motor.setmode(DcMotor.RunMode.RUN_WITHOUT_ENCODER);

 

 

3. Describe the process for setting a motor to turn one full rotation and then stop.
 

 

 

4. Describe the process for setting a motor to run at a consistent speed for two seconds and then stop.

 

 

 

5. This code is supposed to make the motor turn half a rotation. It never moves. There are two errors, what are they? (This is not a configuration problem)

        motor = hardwareMap.dcMotor.get("ml");

        motor.setMode(DcMotor.RunMode.RUN_WITH_ENCODERS);

        startPosition = motor.getCurrentPosition();

        waitForStart();

        motor.setTargetPosition(startPosition + 500);

Here are the answers.

 

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