CNC stands for

• Computer Numerical Control
• Computer Network Control
• Control Numerical Computer
• Centralized Network Control

Explain part programming in CNC machines.

• A part program is a set of instruction providing x and y coordinates to perform the desired machining operations.

• A part programming is the process to complete the machining process.

• A part program consists of all information, necessary to complete the machining process.

• A part program is a set of instruction providing x, y and z coordinates and other details to perform the desired machining operations.

What is the role of G-code (preparatory functions) in CNC programming?

• A programming language used to control CNC machines.

• A set of commands that simulates CNC machining processes.

• A set of commands that define the movement and operation of the machine.

• A hardware component that interprets machine instructions.

How does a CNC machine interpret the G-code commands?

• By translating G-code into a high-level programming language.

• By using a graphical interface to visualize the machining process.

• By manually inputting commands into the machine.

• By converting G-code into mechanical movements through a series of motors.

Describe coordinate system in CNC machine.

• The coordinate system in a CNC machine uses polar coordinates with angles and radii.
• CNC machines operate solely on a spherical coordinate system without axes.
• The coordinate system in CNC machines is based on a single axis for all movements.
• The coordinates (X, Y, Z) are defined relative to the workpiece or the machine’s reference point (origin).

What is the purpose of the spindle in a CNC machine?

• To assist in the programming of G-code commands.

• To control the temperature of the machining environment.

• To provide the necessary rotational force for cutting tools.

• To hold the workpiece in place during machining.

What is the significance of tool offsets in CNC machining?

• Tool offsets are used to adjust the speed of the CNC machine.

• Tool offsets help in compensating for tool wear and ensuring accurate machining.

• Tool offsets are only necessary for 3D printing processes.

• Tool offsets are irrelevant in CNC programming.

How do feed rates (F) affect the machining process in CNC operations?

• Feed rates are only relevant for laser cutting processes.

• Feed rates have no impact on the quality of the finished part.

• Feed rates are used to calculate the power consumption of the machine.

• Feed rates determine the speed at which the tool moves through the material.

What is the role of M-code (miscellaneous function) in CNC programming?

• M-code defines the tool path for CNC machines.
• M-code is responsible for the cooling system in CNC operations.
• M-code controls non-motion functions in CNC programming.
• M-code is used to control the speed of the spindle.

In milling operation, feed rate (F) is measured in units of

• mm/min

• rev/min

• mm/rev

• rev/mm