09.02 CNC Concepts

09.02 CNC Concepts

by Mike Paquette

Multiple Choice

The automation of machine tools by means of computers executing pre-programmed sequences of machine control commands among multi-axis coordinate planes.

• Computer Numerical Control (CNC)

• Computer Alphabetical Control (CAC)

• Computer Cryptographic Control (CCC)

Multiple Choice

Which of the following is not the advantage of CNC machines?

• Reduced scrap rate

• Improved strength of the components

• Higher flexibility

• Improved quality

Multiple Choice

Which of the following system has feedback system?

• Open loop system

• Closed loop system

• Direct loop system

• None of the above

Multiple Choice

System in which positions are given with respect to a fixed point, usually the origin.

• Absolute

• Relative

• Incremental

• Modal

Multiple Choice

What type of coding does a CNC machine use?

• G and M codes

• Q codes

• Bar codes

• No codes

Multiple Choice

What does CNC stand for?

• Computerized Numerical Controls

• Computer memory calculations

• Carry my note book?

Multiple Choice

Specifies the position/location of points uniquely in a plane by a pair of numerical coordinates, which are the signed distances to the point (origin 0,0) from two fixed perpendicular directed lines, measured in the same unit of length.

• Computer-Integrated Manufacturing (CIM)

• Axis

• Cartesian coordinate system

• 3-D (Three-dimensional)

Multiple Choice

Computer-Aided Drafting (CAD) is the making of a set of construction drawings with the aid of a computer.

• True

• False