Start and end G-code customization in 3D Printing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of start G-code in 3D printing?

Start G-code prepares the 3D printer before printing begins. It usually heats the nozzle and bed, homes the axes, and primes the extruder to ensure smooth printing.

beginner

What does end G-code typically do after a print finishes?

End G-code cools down the printer by turning off heaters, moves the print head away from the finished object, and may disable motors to prevent strain.

intermediate

Why customize start and end G-code instead of using defaults?

Customizing allows better control over printer behavior, improves print quality, and adapts to specific printer models or materials.

beginner

Give an example of a common command in start G-code.

A common command is G28, which homes all axes to set the printer's starting position.

intermediate

What could happen if end G-code does not turn off the heaters?

The printer could overheat, wasting energy and potentially damaging the printer or causing safety hazards.

What is the main role of start G-code in 3D printing?

A Prepare the printer before printing

B Cool down the printer after printing

C Pause the print mid-way

D Change filament color automatically

Start G-code prepares the printer by heating and homing before printing begins.

Which G-code command is commonly used to home all axes?

A G1

B M104

C G28

D M140

G28 homes all axes to the printer's starting position.

What is a typical action in end G-code?

A Load filament

B Move print head to home position

C Start heating the nozzle

D Turn off heaters and motors

End G-code usually turns off heaters and motors to safely finish the print.

Why might you customize your start G-code?

A To improve print quality and adapt to your printer

B To make prints take longer

C To disable safety features

D To skip heating the bed

Customizing start G-code helps improve print quality and fits your specific printer setup.

What risk exists if end G-code does not turn off the printer's heaters?

A Print will finish faster

B Printer may overheat and cause damage

C Filament will change color

D Printer will automatically restart

Leaving heaters on can cause overheating and damage or safety hazards.

Explain the main functions of start and end G-code in 3D printing.

Think about what the printer needs before and after printing.

Why is it important to customize start and end G-code for your specific 3D printer?

Consider differences between printers and materials.