Question

In a CNC program block, N130 G02 X65.0 Y60.0 R40.0 F250, G02 refers to

• A. Point-to-point positioning
• B. Line interpolation
• C. Circular interpolation
• D. Parabolic interpolation

Hint:

In CNC programming, G02 denotes clockwise circular interpolation, while G03 denotes counterclockwise circular interpolation, both used for machining arcs.

Answer 1

The Correct Option is C

Step 1: Understand the CNC program block.
The given CNC program block is: N130 G02 X65.0 Y60.0 R40.0 F250. Breaking it down:
N130: Block number (line number in the program).
G02: A G-code that specifies the type of tool motion.
X65.0 Y60.0: The endpoint coordinates of the tool motion (X = 65.0 mm, Y = 60.0 mm).
R40.0: The radius of the circular path (R = 40.0 mm).
F250: Feed rate (250 mm/min).
Step 2: Interpret the G02 code.
In CNC programming, G-codes define the type of motion or operation:
G00: Rapid positioning (point-to-point positioning, no material removal).
G01: Linear interpolation (straight-line motion at a specified feed rate).
G02: Circular interpolation, clockwise (CW) motion along a circular arc.
G03: Circular interpolation, counterclockwise (CCW) motion along a circular arc.
The G02 code specifically indicates that the tool will move in a clockwise circular arc from its current position to the specified endpoint (X65.0, Y60.0), with a radius of 40.0 mm, at a feed rate of 250 mm/min. Step 3: Evaluate the options.
(1) Point-to-point positioning: Incorrect, as this is represented by G00, not G02. Incorrect.
(2) Line interpolation: Incorrect, as this is represented by G01, not G02. Incorrect.
(3) Circular interpolation: Correct, as G02 specifies clockwise circular interpolation. Correct.
(4) Parabolic interpolation: Incorrect, as parabolic interpolation is not a standard G-code in most CNC systems (some systems use G05 for quadratic interpolation, but G02 is for circular motion). Incorrect. Step 4: Select the correct answer.
In the CNC program block, G02 refers to circular interpolation, matching option (3).