Codes And Formats 150401a

Question 1

6 Concepts to understand in order to become proficient in programming CNC machine tools?

K.K.U.U.P.P.

Answer 1

Know your machine from a programmer’s POV
Prepare to create CNC programs
Know how to program the three basic motion types
Understand the compensation types
Provide structure
Understand features that simplify programming

Question 2

List 4 programmable features available on Machining centres

Answer 2

Spindle activation, tool changing, coolant activation, door open and close

Question 3

6 steps to create CNC programs?

C.C.C.P.P.S.

Answer 3

Prepare the Machining process 
 Select the cutting tools
 Calculate cutting conditions 
 Plan workholding setup 
 Calculate coordinates
 Create setup and production documentation

Question 4

List three motion types that tell a machining Center how to move

Answer 4

Rapid, linear, circular

Question 5

List three types of compensation and briefly explain their purpose

Answer 5

Tool length compensation, lets you ignore the exact length of each tool

Cutter radius compensation, lets you ignore the exact diameter of Milling cutters

Fixture offsets, used to specify the location of program zero

Question 6

List 3 reasons why a CNC program should be strictly structured

Answer 6

Helps familiarize you with programming, provides consistency, allows cutting tools to be rerun

Question 7

List 3 features that simplify and shorten CNC programs

Answer 7

Hole Machining canned Cycles
Sub programming
Special programming features

Question 8

List 4 Concepts that you must understand in order to become proficient in the setup and operation of CNC machine tools

Answer 8

Know your machine from an operator’s viewpoint
The three basic modes of operation
Key operation procedures
Verify program safely

Question 9

List 3 basic modes of operation

Answer 9

Manual mode
Manual data input MDI mode
Program operation mode

Question 10

List 4 available safety functions used when verifying a program

Answer 10

Dry run
Single block
Feed hold
Distance to go

Question 11

Briefly explain the difference between G 28 and G 53

Answer 11

G28, all access return to machine zero

G53, position access from machine home, you don’t have to switch back and forth between G91 and G90 using G53