exxos's Atari, Amiga & retro forum

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Sure, I can help you create G-code for a 50mm square to be 3D printed. Below is a simple G-code script that you can use to print a square with a 50mm side length. This example assumes you are using a standard Cartesian FDM 3D printer with basic settings.

### G-code Explanation

- **G28**: Home all axes.
- **G1 F1500**: Set the feed rate to 1500 mm/min.
- **G92**: Set the current position to the given coordinates.
- **M104 S200**: Set the extruder temperature to 200°C.
- **M140 S60**: Set the bed temperature to 60°C.
- **M190 S60**: Wait for the bed temperature to reach 60°C.
- **M109 S200**: Wait for the extruder temperature to reach 200°C.
- **M82**: Set extruder to absolute mode.
- **G1 X__ Y__**: Move the print head to a specified position.
- **G1 Z__**: Move the print head to a specified height.
- **G1 E__**: Extrude filament.

### G-code for 50mm Square

```gcode
; Start G-code
G28 ; Home all axes
G1 Z15 F9000 ; Move the platform down 15mm
G92 E0 ; Reset the extruder's position
M104 S200 ; Set extruder temperature to 200°C
M140 S60 ; Set bed temperature to 60°C
M190 S60 ; Wait for bed temperature to reach 60°C
M109 S200 ; Wait for extruder temperature to reach 200°C
M82 ; Set extruder to absolute mode

; Draw a 50mm square
G1 Z0.3 F1500 ; Move to the first layer height
G1 X0 Y0 F1500 ; Move to start position
G1 E10 ; Prime the extruder

; Start the square
G1 X50 Y0 E15 ; Draw the first side (50mm along X-axis)
G1 X50 Y50 E30 ; Draw the second side (50mm along Y-axis)
G1 X0 Y50 E45 ; Draw the third side (50mm back along X-axis)
G1 X0 Y0 E60 ; Draw the fourth side (50mm back along Y-axis)

G1 E50 ; Retract the filament slightly
G1 Z15 F9000 ; Move the platform down 15mm

; End G-code
M104 S0 ; Turn off the extruder
M140 S0 ; Turn off the bed
G1 X0 Y200 F9000 ; Move the print head away
M84 ; Disable motors
```

### Explanation

1. **Heating and Homing**: The printer homes all axes, sets temperatures, and waits until they are reached.

2. **Starting Position**: The print head moves to a safe height, then positions itself at the origin (0,0).

3. **Drawing the Square**: The print head moves along the four sides of the square, extruding filament as it goes. Each `G1` command moves the print head and extrudes a calculated amount of filament (in this example, arbitrary extrusion lengths are provided for demonstration purposes).

4. **Finishing**: Retracts the filament slightly, moves the print head away, turns off heaters, and disables motors.

### Considerations

- **Layer Height**: This script uses a 0.3mm layer height for the first layer. You might want to adjust this based on your printer and filament.
  
- **Extrusion Values**: The extrusion lengths (E values) are arbitrary here. You will need to adjust them based on your printer’s calibration.

- **Temperatures**: Adjust temperatures according to your filament specifications.

### Adjusting for Your Printer

- **Bed Leveling**: Ensure your bed is leveled properly before starting the print.

- **Calibrate E-steps**: Ensure your extruder is calibrated for the correct extrusion values.

- **Slicer Settings**: Normally, a slicer would generate these values based on your setup, so you might want to test and tweak this manually written G-code on your printer.

You can copy this G-code into a text editor and save it as a `.gcode` file to use with your 3D printer. Adjust any specific parameters like temperatures and extrusion lengths as needed for your specific printer setup.

Code: Select all

; G-code for a 50mm cube

; Basic setup
G21 ; Set units to millimeters
G90 ; Use absolute positioning
M82 ; Set extruder to absolute mode
M107 ; Turn off the fan

; Start heating
M104 S200 ; Set extruder temperature to 200°C
M140 S60 ; Set bed temperature to 60°C
M190 S60 ; Wait for bed temperature
M109 S200 ; Wait for extruder temperature

; Start G-code
G28 ; Home all axes
G1 Z15.0 F9000 ; Move the platform down 15mm
G92 E0 ; Reset the extruder position
G1 F140 E3 ; Extrude 3mm of filament

; Purge line
G92 E0
G1 F140 E10
G92 E0
G1 F140 E0

; Begin cube printing
G92 E0 ; Reset extruder
G1 F140 E0 ; Reset extrusion distance

; Layer 1
G1 F9000 X10 Y10 Z0.3 ; Move to start position
G1 F140 E3 ; Prime extruder
G1 F900 ; Set print speed
G1 X60 Y10 E5 ; Draw front line
G1 X60 Y60 E5 ; Draw right line
G1 X10 Y60 E5 ; Draw back line
G1 X10 Y10 E5 ; Draw left line
G1 F140 E0 ; Reset extrusion distance

; Continue layers
G92 E0
G1 Z0.6 ; Move up to next layer
G1 F900 ; Set print speed

; Repeat this block for each layer
M106 S255 ; Turn on fan

; Layer loop
M117 Printing...
M106 S255 ; Turn on fan

; Loop for layers
G92 E0
G1 F9000 X10 Y10 Z0.3 ; Move to start position

; Loop 250 layers to create 50mm height at 0.2mm layer height
G92 E0 ; Reset extruder
M106 S255 ; Turn on fan

; Layer-by-layer printing
; Note: This simple example does not include infill and support
; Modify and repeat the following section for more layers

; Increment layer height
G1 Z0.6 ; Move to next layer
G1 X60 Y10 E5 ; Draw front line
G1 X60 Y60 E5 ; Draw right line
G1 X10 Y60 E5 ; Draw back line
G1 X10 Y10 E5 ; Draw left line

; Finalization
G92 E0 ; Reset extruder
M104 S0 ; Turn off extruder
M140 S0 ; Turn off bed
G1 F9000 Z15 ; Move platform down
M84 ; Disable motors