Which method can be used to prevent warping in FDM prints?

Optimizing bed adhesion is crucial in preventing warping during Fused Deposition Modeling (FDM) printing. When the first few layers of a print do not adhere well to the print bed, the material tends to lift at the corners or edges as it cools, leading to warping. By ensuring the print is securely attached to the build surface, the chances of this happening are significantly reduced.

Techniques to improve bed adhesion include using adhesives like glue sticks, painter's tape, or specialized build surfaces designed to enhance grip. Additionally, adjusting the nozzle height so that the extruded material compresses adequately to the surface can further assist in creating a strong bond right from the start of the print.

While other methods mentioned may influence the printing process in various ways, they do not directly tackle the primary cause of warping. For instance, increasing print speed could lead to other issues, such as reduced adhesion or poor layer bonding, and using a lower nozzle temperature might lead to inadequate melting of the filament, both of which could exacerbate warping. Reducing layer height can improve print detail but does not specifically address adhesion, which is critical in the first layers to avoid warping.