Why Does a Heated Bed Matter?

A heated bed ensures that the first layers of a print adhere securely to the build surface and that the bottom section of the part cools in a controlled manner. Plastic shrinks as it cools; if the bed is cold, the edges of the part lift up (warping) and the print fails.

Typical bed temperatures by material: 50–60°C for PLA, 70–80°C for PETG, 90–110°C for ABS. For high-shrinkage materials like ABS, an enclosed enclosure is also required in addition to a heated bed.

The bed surface itself also matters: a PEI coating provides excellent adhesion for most materials, a glass surface delivers a flat bottom finish, and spring-steel flex plates make it easy to remove finished parts.