Why G-code is the language of CNC machines in CNC Programming - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to move the CNC machine to the origin point.

CNC Programming

G0 X[1] Y0 Z0

Drag options to blanks, or click blank then click option'

A0

B-10

C100

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-zero value moves the machine away from the origin.

Confusing G0 with G1 which is for controlled feed movement.

G0 command moves the machine quickly to the specified coordinates. To move to the origin, X must be 0.

2fill in blank

medium

Complete the code to set the feed rate to 150 mm/min.

CNC Programming

F[1]

Drag options to blanks, or click blank then click option'

A200

B50

C150

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using a feed rate too high or too low for the material.

Confusing feed rate with spindle speed.

F command sets the feed rate. To set it to 150 mm/min, use F150.

3fill in blank

hard

Fix the error in the code to perform a linear cut to X=50, Y=25 at feed rate 100.

CNC Programming

G1 X[1] Y25 F100

Drag options to blanks, or click blank then click option'

A50

B25

C75

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong X coordinate causes the tool to cut in the wrong place.

Omitting feed rate or using wrong command.

The code moves linearly to X=50, Y=25 at feed rate 100. X must be 50 to match the instruction.

4fill in blank

hard

Fill both blanks to define a clockwise circular move with radius 10 starting at current position.

CNC Programming

G2 I[1] J[2]

Drag options to blanks, or click blank then click option'

A10

B-10

C0

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative radius when positive is needed.

Swapping I and J values.

G2 is clockwise arc move. I and J define the center offset from start. Radius 10 on X (I=10), no offset on Y (J=0).

5fill in blank

hard

Fill all three blanks to create a dictionary that maps axis names to their zero positions.

CNC Programming

{'X': [1], 'Y': [2], 'Z': [3]

Drag options to blanks, or click blank then click option'

A0

B1

C-1

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using different values for axes when zero is expected.

Using None or negative values incorrectly.

The zero position for all axes is 0, so all values should be 0.