Occasionally when 3D printing, you may notice diagonal scars on your print.
In contrast, narrower raised lines tend to signify over extrusion, oozing, or stringing.
Combing keeps the print head over the already printed material.
Disabling combing will increase your print times, potentially significantly, but can often eliminate most scarring issues.
This adjusts how high the print head lifts when traveling from one layer to another.
These prefs shouldnt need much adjustment, so try increasing it in increments of .25mm.
Over extrusion is a common cause of this.
To address over extrusion, simply lower the flow rate in your slicing software.
Typically a reduction of 5% is a good starting point.
Nozzle temperature can also be an issue, especially with older or cheaper filaments.
Poor quality filament or filament that has been exposed to the elements can have lower tolerances.
This makes it more likely to ooze or string when the printer is not actively printing.
Conclusion
With these tips, you should now be able to resolve scarring issues on your prints.
