A 3D printer is a type of CNC machine.
CNC stands for Computer Numerical Control, and it refers to machines that are controlled by computers to produce precise parts or objects. 3D printers use CNC to control the movement of the print head, which deposits material layer by layer to create a three-dimensional object.
Some CNC are additive some are Subtractive.
3D FFF 3D printers that do not support G2/G3 commands are typically older, budget-friendly models. Some common examples include:
- Monoprice Maker Select Plus
Marlin firmware supports G2/G3 commands. G2 and G3 are G-code commands that are used to create arcs and circles. Arcs and circles are useful for printing a variety of shapes, such as curved surfaces, rounded corners, and holes.
To use G2/G3 commands in Marlin firmware, you must first enable arc support. This can be done by editing the Marlin configuration file and setting the ARC_SUPPORTED parameter to true. Once arc support is enabled, you can use G2 and G3 commands in your G-code files to create arcs and circles.
Yes, Marlin firmware still breaks down arcs into segments even with G2/G3 commands. BUT, if you are using a 3D printer that is capable of printing arcs natively, you can disable Marlin firmware's arc discretization feature by setting the ARC_SEGMENT_MAX_LENGTH parameter to a very large value.
However, it is important to note that disabling arc discretization can lead to print quality problems if the printer is not able to handle the high number of line segments required to approximate the arc.
There are two main ways for a slicer software to add the option to have G2/G3 commands in the generated G-code:
- Add a new setting to the slicer software to enable or disable G2/G3 commands. This is the simplest approach, and it is the approach that is used by some popular slicer software, such as Cura and PrusaSlicer.
- Add a new post-processor to the slicer software that converts arcs to G2/G3 commands. This approach is more complex, but it allows the slicer software to have more control over how arcs are converted to G2/G3 commands.
If a slicer software chooses to add a new setting to enable or disable G2/G3 commands, the setting should be placed in the slicer software's preferences or settings dialog. The setting should be clearly labeled and have a description that explains what it does.
If a slicer software chooses to add a new post-processor to convert arcs to G2/G3 commands, the post-processor should be placed in the slicer software's post-processors directory. The post-processor should have a clear and descriptive name.
Here are some additional considerations for adding the option to have G2/G3 commands in the generated G-code:
- The slicer software should check to make sure that the printer firmware supports G2/G3 commands before enabling the option. If the printer firmware does not support G2/G3 commands, the slicer software should display a warning message to the user.
- The slicer software should provide documentation on how to use the new option. The documentation should explain what G2/G3 commands are and how they can be used.
- The slicer software should test the new option thoroughly to make sure that it works correctly.