If you use the Move block in the LEGO MINDSTORMS NXT software to program your motors, the two motors will automatically synchronize, so that your robot will move in a straight line.

- Built-in Rotation Sensor
- Each motor has a built-in Rotation Sensor. - This lets you control your robot's movements precisely.
- The Rotation Sensor measures motor rotations in degrees or full rotations [accuracy of +/- one degree].
- One rotation is equal to 360 degrees, so if you set a motor to turn 180 degrees, its output shaft will make half a turn.

The built-in Rotation Sensor in each motor also lets you set different speeds for your motors [by setting different power parameters in the software]. Try running the motors at different speeds.

Test it! Test the built-in Rotation Sensor's ability to measure distance:


1. Connect a motor to the NXT
2. Select the VIEW submenu on the NXT
3. Select the Motor Rotations icon.
4. Select the port where you have connected the motor
5. Attach a wheel to the motor and measure the rotations as you roll the wheel along the floor

Try Me

The NXT comes with a Try Me function. Select the Try Me submenu on the NXT display and test your motors. You'll get a fun reaction.