CNC CNC G-Code and Programming

Question 1

Which G-code command is used to set absolute positioning mode in CNC programming?

Accepted Answer

G90

Answer

G90 sets the machine to absolute positioning mode, where all coordinates are measured from the work origin.

Question 2

What does the M03 command do in a CNC cutting program?

Accepted Answer

Starts the spindle clockwise

Answer

M03 starts the spindle in the clockwise (CW) direction, which is the standard direction for most cutting tools.

Question 3

Which G-code is used to perform a circular interpolation in the clockwise direction?

Accepted Answer

G02

Answer

G02 commands the machine to move in a clockwise circular arc, defined by the center point (I, J, K) or radius (R).

Question 4

What is the function of the F-word in a CNC program block?

Accepted Answer

Feed rate

Answer

The F-word specifies the feed rate, which controls how fast the cutting tool moves through the material.

Question 5

Which G-code command cancels tool radius compensation in CNC programming?

Accepted Answer

G40

Answer

G40 cancels cutter radius compensation, returning the tool path to the programmed centerline.

CNC - Cutting Practice Test