Gaps Between Infill and Outline

Each layer of your 3D print consists of outer perimeters and inner infill. The perimeters trace the exterior of your part, ensuring strength and precision, while the infill is printed inside to support the structure. The infill typically follows a fast, back-and-forth pattern to optimize speed. Since the infill uses a different pattern than the outer perimeters, it's crucial that both sections merge seamlessly. If you notice small gaps between the edges of the infill and the perimeter, there are several settings you can adjust to fix this issue.

Common Causes and Solutions:

Insufficient Outline Overlap

To address this, you must fine-tune the setting that adjusts the bond between the outer perimeters and the infill. This setting controls how much the infill overlaps the perimeter to ensure a solid connection. The overlap is expressed as a percentage of the extrusion width, allowing it to scale automatically based on different nozzle sizes. For instance, if the overlap is set at 20%, the software will instruct the printer to ensure the infill overlaps with 20% of the inner perimeter. Increasing this overlap strengthens the bond. If you currently have the setting at 20%, try increasing it to 30% and check if the gaps disappear.

Printing Speed is Too Fast

The infill is usually printed faster than the outer perimeters, but if it’s printed too quickly, the infill may not bond properly to the perimeter. If increasing the outline overlap hasn’t resolved the issue, you should consider lowering the print speed.