CNC Cutting Machine Practice Test

Which type of CNC system primarily uses discrete positional commands?

1. Point-to-point NC systems

2. Contouring NC systems

3. 3D printing systems

4. Robotic machining systems

The correct answer is: Point-to-point NC systems

The correct choice highlights that point-to-point NC systems primarily utilize discrete positional commands. In such systems, the machine moves from one defined position to another without necessarily following a continuous path. Each movement is determined by specific coordinates or points, which means that the machine does not engage in continuous cutting or processing but rather focuses on distinct locations, thereby executing operations at set points. This characteristic is a key distinguishing feature of point-to-point systems, as their programming and operation are based on separate command inputs for each position the tool must reach. As a result, the focus is on reaching these predefined points rather than maintaining fluid motion, which is more characteristic of contouring systems, where continuous path control is required for complex shapes. Understanding the operational principles of each system sheds light on why point-to-point is defined by discrete commands while other systems, like contouring, rely on continuous movement and commands that guide the tool along a defined path rather than merely to specific points.