Deck 3: The Nc Programming Process

Question 1

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

Answer 1

True

Question 2

What is the result of a wrong tool offset?

A) Scrapped workpiece
B) Broken tool and ruined workpiece
C) The tool will be too high or too low
D) Broken tool and damaged fixture

Answer 2

C

Question 3

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.

A) serial port
B) backplot
C) file block
D) solids verifier

Answer 3

B

Question 4

How is data transferred over a serial cable?

Question 5

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 ____.

A) crosshatch
B) port
C) origin
D) EOB

Question 6

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

Question 7

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

Question 8

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

A) File
B) Text
C) Single
D) End

Question 9

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

A) Drop
B) Port
C) Part
D) Drip

Question 10

What are the steps involved in program proving?

Question 11

What is Distributed Numerical Control?

Question 12

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

A) EOB
B) file
C) block
D) ASCII

Question 13

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

Question 14

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) ____.

A) toolpath
B) encoding
C) EOB
D) mechanism

Question 15

How can you catch programming errors?

Question 16

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

A) text editor
B) EOB
C) computer simulation
D) serial port

Question 17

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

A) offset
B) distance
C) dry
D) file

Question 18

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

Question 19

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

Question 20

CNC machine tools move ____.

A) manually
B) automatically
C) slowly
D) with little power