The Impact of Absolute Mode

Oct 13, 2025 by wbrum.org 123 views

Understanding the Issue

When it comes to 3D printing, precise control over the extruder and fan is crucial for achieving high-quality prints. However, some users have reported an issue where the printer retracts the filament excessively before changing the fan speed in absolute mode. This can lead to print failures, as the sudden retraction can cause the filament to break or become tangled.

The Role of G-Code in 3D Printing

G-code is a programming language used to control 3D printers. It consists of a series of commands that instruct the printer on how to move, extrude, and retract the filament. In the context of the issue at hand, the G-code is responsible for controlling the fan speed and extruder retraction.

Analyzing the Erroneous G-Code

The provided screenshot of the erroneous G-code reveals a series of commands that appear to be responsible for the excessive retraction. Upon closer inspection, it becomes clear that the issue lies in the way the fan speed is being changed.

M106 S0 ; turn off fan
G1 F3000 X0 Y0 Z0.2 E-1.5 F3000 ; retract filament
M106 S100 ; turn on fan

In this example, the G-code first turns off the fan (M106 S0) and then retracts the filament by 1.5mm (G1 F3000 X0 Y0 Z0.2 E-1.5 F3000). This is followed by turning on the fan (M106 S100). The issue arises when the printer retracts the filament excessively before changing the fan speed.

The Impact of Absolute Mode

Absolute mode is a setting in the printer's firmware that allows for precise control over the extruder and fan. However, when used in conjunction with the erroneous G-code, it can lead to the excessive retraction issue.

The Role of Firmware in 3D Printing

Firmware is the software that controls the printer's hardware. In the case of the Creality Print 6.0.1.1794, the firmware is responsible for executing the G-code and controlling the extruder and fan.

Troubleshooting the Issue

To troubleshoot the issue, it is essential to identify the root cause of the problem. In this case, the erroneous G-code is the primary culprit. To resolve the issue, the G-code needs to be modified to prevent excessive retraction.

Modifying the G-Code

To modify the G-code, the following changes can be made:

M106 S0 ; turn off fan
G1 F3000 X0 Y0 Z0.2 E-0.5 F3000 ; retract filament
M106 S100 ; turn on fan

In this modified version of the G-code, the retraction distance has been reduced from 1.5mm to 0.5mm. This should prevent the excessive retraction and resolve the issue.

Conclusion

In conclusion, the issue of massive retraction before fan speed change in absolute mode is a complex problem that requires a deep understanding of G-code and firmware. By analyzing the erroneous G-code and modifying it to prevent excessive retraction, users can resolve the issue and achieve high-quality prints.

Recommendations

To avoid this issue in the future, users should:

Verify the G-code: Before printing, verify the G-code to ensure that it is correct and does not contain any errors.
Use a reliable firmware: Use a reliable firmware that is compatible with the printer and has been tested for stability.
Monitor the print: Monitor the print closely to detect any issues early on and take corrective action.

Additional Resources

For further information on G-code and firmware, users can refer to the following resources:

Creality Print User Manual: The user manual for the Creality Print 6.0.1.1794 provides detailed information on G-code and firmware.
3D Printing Forums: Online forums dedicated to 3D printing provide a wealth of information on G-code and firmware, as well as troubleshooting tips and advice from experienced users.

Attachments

The following attachments are provided for reference:

Part Studio 1 2.zip: A zip file containing the relevant files for the print.
Erroneous G-Code Screenshot: A screenshot of the erroneous G-code.

Disclaimer

Q: What is the cause of the massive retraction before fan speed change in absolute mode?

A: The cause of the massive retraction before fan speed change in absolute mode is due to the erroneous G-code that is being executed by the printer. The G-code contains a series of commands that instruct the printer to retract the filament excessively before changing the fan speed.

Q: What is the impact of absolute mode on the printer's behavior?

A: Absolute mode is a setting in the printer's firmware that allows for precise control over the extruder and fan. However, when used in conjunction with the erroneous G-code, it can lead to the excessive retraction issue.

Q: How can I troubleshoot the issue of massive retraction before fan speed change in absolute mode?

A: To troubleshoot the issue, you can follow these steps:

Verify the G-code: Before printing, verify the G-code to ensure that it is correct and does not contain any errors.
Use a reliable firmware: Use a reliable firmware that is compatible with the printer and has been tested for stability.
Monitor the print: Monitor the print closely to detect any issues early on and take corrective action.

Q: What modifications can I make to the G-code to prevent excessive retraction?

A: To modify the G-code, you can reduce the retraction distance from 1.5mm to 0.5mm. This should prevent the excessive retraction and resolve the issue.

Q: What are some best practices for writing G-code?

A: Some best practices for writing G-code include:

Use clear and concise commands: Use clear and concise commands that are easy to understand.
Avoid unnecessary retraction: Avoid unnecessary retraction to prevent excessive retraction.
Use reliable firmware: Use reliable firmware that is compatible with the printer and has been tested for stability.

Q: What are some common mistakes to avoid when writing G-code?

A: Some common mistakes to avoid when writing G-code include:

Incorrect retraction distance: Incorrect retraction distance can lead to excessive retraction.
Inconsistent fan speed: Inconsistent fan speed can lead to poor print quality.
Incorrect extruder temperature: Incorrect extruder temperature can lead to poor print quality.

Q: How can I ensure that my G-code is correct and free of errors?

A: To ensure that your G-code is correct and free of errors, you can:

Verify the G-code: Before printing, verify the G-code to ensure that it is correct and does not contain any errors.
Use a reliable firmware: Use a reliable firmware that is compatible with the printer and has been tested for stability.
Monitor the print: Monitor the print closely to detect any issues early on and take corrective action.

Q: What are some resources available for learning more about G-code and firmware?

A: Some resources available for learning more about G-code and firmware include:

Creality Print User Manual: The user manual for the Creality Print 6.0.1.1794 provides detailed information on G-code and firmware.
3D Printing Forums: Online forums dedicated to 3D printing provide a wealth of information on G-code and firmware, as well as troubleshooting tips and advice from experienced users.

Q: What are some common issues that can arise when using absolute mode?

A: Some common issues that can arise when using absolute mode include:

Excessive retraction: Excessive retraction can lead to poor print quality.
Inconsistent fan speed: Inconsistent fan speed can lead to poor print quality.
Incorrect extruder temperature: Incorrect extruder temperature can lead to poor print quality.

Q: How can I troubleshoot issues related to absolute mode?

A: To troubleshoot issues related to absolute mode, you can:

Verify the G-code: Before printing, verify the G-code to ensure that it is correct and does not contain any errors.
Use a reliable firmware: Use a reliable firmware that is compatible with the printer and has been tested for stability.
Monitor the print: Monitor the print closely to detect any issues early on and take corrective action.