Creating a strong infill
The infill is an important factor in your product’s strength. Therefore, it’s important to prevent the infill from being too thin or stringy with the tips underneath.
There are several infill patterns to choose from and they each lead to different tenacities. Examples of robust infill types are grid-shaped, triangular of solid honeycomb. Less strong are the rectilinear and the fast honeycomb infill. These less robust infills could however still be preferable, as these types can be printed faster and are robust enough for most products.
Lower printing speed:
The infill is usually printed slower than other parts of the product. When the printing speed is set too high, the nozzle cannot extrude enough material. Result: a thin and stringy infill that doesn’t provide the right strength. Therefore, try decreasing the ‘Solid Infill Underspeed’ a little, to allow the printer enough time for a strong infill.
High infill extrusion:
To all products applies: the thicker the infill, the more robust the product. You can thicken the infill by increasing the width of the raster. Set the Infill Extrusion Width to 110% to extrude more material and achieve a more solid grid. Thickening the infill does however mean that more material is required and that the printing process will be slowed down. You could therefore simultaneously make the infill more loose by placing the grids further apart. To do this, adjust the infill percentage in the slicing software.
You want to print fast and not waste too much material, but you also want to give your product the right strength. It’s therefore important to find the right balance! Experiment with different infill patterns, the printing speed and the infill extrusion to achieve the result that meets your product requirements.