G-code is the standard programming language for 3D printers. It is used to control print head movement, media advance, and other print settings. Below is a list of the most common G-code commands for 3D printers:

1. G0/G1 - movement along the X, Y, Z axes with given coordinates

G0 and G1 are two commands that are used to move the print head along the X, Y and Z axes. They differ only in the speed of movement. G0 moves the head at the maximum speed, and G1 moves at the set speed, which is specified with an F code.

An example of using the command:

G1 X10 Y20 Z0.2 F1000

This command will move the head 10mm in the X-axis, 20mm in the Y-axis, and 0.2mm in the Z-axis at a speed of 1000mm/min.

2. G28 - move to the starting point (home)

The G28 command is used to move the print head to the starting point. This can be a position that was set as the starting point before printing began, or a position that was saved with the G92 command.

An example of using the command:

G28 This command will move the head to the starting point.

3. G29 - start automatic table calibration

The G29 command is used to start automatic table calibration. This allows the printer to determine the exact position of the table and correct it during printing.

An example of using the command:

G29 This command will start automatic table calibration.

4. G90 - setting absolute coordinates

The G90 command is used to set absolute coordinates. This means that all head movements will be relative to the start point that was set before printing began.

An example of using the command:

G90 This command will set absolute coordinates.

5. G91 - setting relative coordinates

The G91 command is used to set relative coordinates. This means that all head movements will be relative to the current head position.

An example of using the command:

G91 This command will set relative coordinates.

6. G92 - setting the current position as the initial

The G92 command is used to set the current head position as the starting point. This can be useful if the print head has been misaligned during printing and needs to be returned to its original position.

An example of using the command:

G92 X0 Y0 Z0 This command will set the current head position to the start point (0, 0, 0) along the X, Y and Z axes.

7. G-code to control the speed of the print head (F-code)

The F-code is used to control the speed of the print head. This command specifies the travel speed in mm/min.

An example of using the command:

G1 X10 Y20 Z0.2 F1000 This command will move the head 10mm in the X-axis, 20mm in the Y-axis, and 0.2mm in the Z-axis at a speed of 1000mm/min.

8. G-code for material feed control (M-code)

An M code is used to control the material feed. For example, M109 is used to set the print head heating temperature and wait until it reaches the set temperature.

An example of using the command:

M109 S200 This command will set the print head temperature to 200 degrees and wait for it to reach that temperature.

9. G-code to change the heating temperature of the print head or table (M104, M140)

M104 is used to set the print head heating temperature, and M140 is used to set the platen heating temperature.

An example of using the command:

M104 S200 This command will set the print head temperature to 200 degrees.

10. G-code to stop printing (M0, M1, M2, M112)

M codes can also be used to stop printing. For example, M0 is used to stop printing and display a message on the screen.

An example of using the command:

M0 This command will stop printing and display a message on the screen.

11. G-code to change the rotation speed of the extruder shaft (M221)

M221 is used to change the rotation speed of the extruder shaft. For example, if the printed object has a complex shape, then you can reduce the speed of rotation of the extruder shaft to more accurately apply plastic.

An example of using the command:

M221 S90 This command will set the rotation speed of the extruder shaft to 90%.

12. G-code to change screen backlight brightness (M355)

M355 is used to change the brightness of the screen backlight. This can be useful when using the printer in a dark room.

An example of using the command:

M355 S50 This command will set the screen backlight brightness to 50%.

13. G-code to move the E (extrusion) axis (G92 E)

G92 E is used to set the current position of the E (extrusion) axis. This can be useful if you want to start printing from a specific point on the E axis.

An example of using the command:

G92 E10 This command will set the current position of the E axis to 10.

14. G-code to change the table heating temperature (M140)

M140 is used to set the table heating temperature. For example, if you are using plastic that requires table heating, you can set the table heating temperature using this command.

An example of using the command:

M140 S60 This command will set the table heating temperature to 60 degrees.

15. G-code to set debug mode (M111)

M111 is used to set the debug mode. This can be useful when troubleshooting printer errors.

An example of using the command:

M111 S1 This command will set the debug mode to enabled.

These are just some of the G-code commands that can be used when printing with a 3D printer. Depending on the printer model and software used, the list of commands may vary.

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