Common G-code commands (G0, G1, G28, M104, M106) in 3D Printing - Practice Problems & Coding Challenges

Challenge - 5 Problems

📋 Factual

intermediate

What does the G0 command do in G-code?

In 3D printing, the G0 command is used to:

A Move the print head slowly while extruding filament

B Home all axes to their origin positions

C Move the print head quickly to a specified position without extruding filament

D Set the temperature of the print bed

💡 Hint

Think about which command moves the print head fast without printing.

The G0 command moves the print head quickly to a position without extruding filament, often used for travel moves.

🧠 Conceptual

intermediate

What is the main difference between G0 and G1 commands?

Both G0 and G1 move the print head. What key difference affects printing?

A G0 moves without extruding filament; G1 moves while extruding filament

B G0 sets temperature; G1 homes the axes

C G0 homes the axes; G1 moves without extruding filament

D G0 moves slowly; G1 moves quickly

💡 Hint

One command is for travel moves, the other for printing moves.

G0 is for fast moves without extrusion; G1 moves while extruding filament to print.

🔍 Analysis

advanced

What happens when the G28 command is executed?

Consider a 3D printer starting a print. What does the G28 command do?

A Moves the print head to the last saved position

B Sets the extruder temperature

C Turns on the cooling fan

D Homes all axes to their origin positions

💡 Hint

Think about the printer's starting position before printing.

G28 homes all axes, moving them to their origin or zero positions to calibrate before printing.

❓ Reasoning

advanced

What is the effect of the M104 command in a print job?

During a print, the M104 command is used to:

A Set the extruder temperature without waiting

B Turn on the cooling fan

C Home the print bed

D Move the print head to a specific coordinate

💡 Hint

Consider commands that control temperature but do not pause the print.

M104 sets the extruder temperature but does not wait for it to reach the target before continuing.

❓ Comparison

expert

Which command controls the cooling fan speed during printing?

Among the following G-code commands, which one adjusts the cooling fan speed?

A G1

B M106

C M104

D G28

💡 Hint

Think about commands starting with M that control hardware like fans.

M106 sets the cooling fan speed, allowing control of print cooling during the job.