Motor Blocks direct motors A, B, or C to rotate clockwise or counterclockwise.  The motors have sensors inside them that can measure how much they rotate.  Motors C and B usually are used for the drive wheels on a vehicle Robot.   You may change the following variables on a motor on the details window.

This icon creates a new movement block.

This icon represents the movement block inside the program.

This is the detail window for the selected block.  You may change the following variables: Which motors are controlled by the block (A, B, or C) (B and C are usually the drive motors in vehicle robots.) Direction Steering (B and C working together) Power (Speed) Duration (How Long - How Far) Next Action (Brake or Coast)

Robot Turns with NXT-G: Swing and Point Turn (With Basic Tribot Robot Design)

A. Swing Turn -> One wheel turns and robot pivots on opposite wheel

Right Swing Turn => Left Motor (C) Rotates Forward

Left Swing Turn => Right Motor (B) Rotates Forward

B.  Point Turn => Both wheels rotate in opposite directions and robot pivots over center point. (Use 1 Motor C/B block with directional arrow pushed all the way to left or right)

Right Point Turn => Left Motor (C) Rotates Forward while Right Motor (B) Rotates Backward  (Motor C/B block with directional arrow pushed all the way to the right.)

Left Point Turn => Left Motor (C) Rotates Backward while Right Motor (B) Rotates Forward (Motor C/B block with directional arrow pushed all the way to the left.)

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