G-code is a programming language that the machine understands and is a series of commands that tells the machine what actions to perform - where to move, what speed to use, what temperatures to set, and much more. Before you start 3D printing, you need to download the software Snapmaker Luban from our website (https://snapmaker.com/product/snapmaker-original/downloads) and install it. And you need to generate the G-code file from your 3D model file.

7.1 Generating G-code Workflow

The workflow of G-code generating is:

Select the 3D Printing G-code Generator  -> Upload model file -> Move / Scale / Rotate the model as needed -> Select the material in Material section -> Select the printing mode in 

Printing Settings section -> Generate G-code.

Note 1: Make sure you have selected the correct machine model Original in the top left corner.

Note 2: Left-click to select a model, right-click to see the operation menu.

Note 3: Uploading multiple 3D models at the same time is supported.

Note 4: If you need to configure the material parameters in Material section , select one default material as profile and then click Plus button +.

Note 5: If you need to configure the printing parameters in Printing Settings section, click Customize and select one mode as a basis. Then click Plus button + to create your own profile.

Note 6: If you want to export all loaded models as STL or OBJ files, click Export Models in the 

bottom right corner.

7.2 Printing with Adhesion Structure (Brim / Raft / Skirt)

Brim, Raft, and Skirt are detachable structures for minimizing the problem of object adherence to the heated bed.

To set the adhesion structure, click Customize under Printing Settings, select one mode as a basis, and click Plus button + to create your own profile. Then, choose the adhesion type you need in the drop-down list.

Brim adds a single layer flat area around the base of your model to prevent warping. When to use a brim:
Warping: A brim can help prevent warping and is therefore recommended to be used while printing with materials like ABS filament.
Greater Bed Adhesion: Similarly to 3D printing rafts, brims help to improve bed adhesion.
Added Precaution: As a safety measure, brims can be added to any print that needs strong bed adhesion. While not especially required for printing with filaments like PLA, they still make prints easier to remove. In that way, users can add brims as an added safety precaution.

Raft adds a thick grid with a roof below the model. When to use a raft:
Warping: 3D printing a raft while working with ABS filament helps to prevent the print from warping.
Greater Bed Adhesion: 3D printing a raft will also help to achieve better bed adhesion and act as a precaution against failure.
Tiny Legs: Suppose a print has tiny legs at the bottom, upon which a heavy structure is built. In such cases it is recommended to build a raft as a safety precaution against failure.

Skirt is a line (or multiple lines) printed around the model, but not connected to the model. The skirt is extruded on the heated bed before starting to print your model. Skirts serve a useful purpose because they help prime your extruder and establish a smooth flow of filament. Observing the skirt also allows you to detect and adjust any leveling or adhesion issues before the actual model begins printing.

7.3 Printing with Support Structure

When your model has an overhang or a bridge that is not supported by anything below, you may need to use support structures to 3D print it.

To set the support structure, click Customize under Printing Settings, select one mode as a basis, and click Plus button + to create your own profile. Then, tick the Generate Support box and set the support pattern you need in the drop-down list.

Please note that not all overhangs need to be supported. If an overhang tilts at an angle less than 40 degrees from the vertical, then you may be able to print that overhang without using 3D printing support structures. You can set the Support Overhang Angle to determine the threshold value for adding support structures or not, which is 50° by default.
Generally, if a bridge is less than 5mm in length, the printer may be able to print it without requiring 3D printing support structures. However, if the bridge is longer than 5mm, you need to add 3D printing support structures.
The default Support Pattern is Zig Zag that is relatively easy to remove. You can choose other support patterns as needed, too.