Exam 3: The Nc Programming Process

The NC code for an entire part program is rarely complicated.

The first step in creating an NC program is to plan all of the different points that the tool will have to pass through to create the desired shape. This is called a(n) ____.

____ feed is a technique used on CNC machines that do not have enough memory for extremely large, computer-generated NC part programs.

Part programs should be tested by first using a(n) ____ on the PC.

Backplotting software will give a graphical display of the centerline toolpath for each block of code.

A(n) ____ is the smallest unit of storage for related information on a computer system.

How can you catch programming errors?

When we work with a two-dimensional coordinate system, there must always be a point where the horizontal axis crosses the vertical axis. We call it the ____.

What is the result of a wrong tool offset?

CNC machine tools should only be operated with the doors open while in automatic operation.

Generally speaking, it is efficient to stand on the shop floor and key a program into the machine tool.

How is data transferred over a serial cable?

What is Distributed Numerical Control?

A ____ is a simple graphical representation of a toolpath that is made up of lines and arcs and used to verify the accuracy of an NC part program.

____ block is a mode of operation that causes the CNC control to stop at the end of each block of code.

What are the two common methods used to produce NC part programs?

What are the steps involved in program proving?

Serial communication to CNC machines is probably going to become extinct as the controls become more advanced.

CNC machine tools move ____.

A(n) ____ run will generally run through the program at a reduced rate.