Correct Answer - Option 1 : Circular interpolation - clockwise
Explanation:
CNC stands for Computer Numerical Control, is a machine in which a dedicated computer is used to perform all the basic Numerical Control functions.
Part program: It is a set of instructions for computers to control a machine tool.
The complete part program to produce a component is input and stored in computer memory and information for each operation is fed to the machine tools.
G-codes:
These are the general-purpose codes. Some of the G codes with their purpose are:
|
G-Code
|
Purpose
|
|
G00
|
Rapid positioning
|
|
G01
|
Linear interpolation
|
|
G02
|
Circular interpolation clockwise
|
|
G03
|
Circular interpolation counterclockwise
|
|
G04
|
Dwell
|
|
G09
|
Exact stop
|
|
G32
|
Thread cutting
|
|
G40
|
Tool-nose radius compensation cancel
|
|
G41
|
Tool-nose radius compensation left
|
|
G42
|
Tool-nose radius compensation right
|
|
G75
|
Grooving on X-axis
|
|
G90
|
Absolute dimension |
|
G91
|
Incremental dimension |
|
G97
|
Spindle speed command
|
|
G98
|
Feed per minute
|
|
G99
|
Feed per revolution
|
M-codes:
These are the miscellaneous codes that tell a machine how to act.
Some of the M-codes with their purpose are:
|
M-Code
|
Purpose
|
|
M00
|
Program stop
|
|
M01
|
Optional program stop
|
|
M02
|
Program end
|
|
M03
|
Spindle ON clockwise
|
|
M04
|
Spindle ON counterclockwise
|
|
M05
|
Spindle OFF
|
|
M06
|
Tool change
|
|
M08
|
Coolant ON
|
|
M09
|
Coolant OFF
|
|
M10
|
Chuck or rotary table clamp ON
|
|
M11
|
Chuck or rotary table clamp OFF
|
|
M30
|
Program end, return to start
|
Advantages of CNC machine:
- Reduce lead time
- Elimination of operator errors
- Lower labour cost
- Smaller batches
- Long tool life
- Elimination of special Jigs and Fixture
- Flexibility in changes of component design
- Reduce inspection
- Less scrap
