Heated bed
A heated bed is a build plate that warms to a set temperature, so the first layer of a print sticks and the part cools more gradually.
Why it matters
Bed temperature is part of every filament’s settings. Prusa recommends 60 °C for PLA, 85 to 90 °C for PETG and 105 to 110 °C for ASA. Materials that shrink more as they cool, such as ASA, need a hotter bed.
Check the maximum bed temperature before you buy a printer. A bed that stops at a lower temperature can limit which materials you can print.
If a print won’t stick, Prusa suggests raising the bed temperature by 5 to 10 °C. Poor adhesion also leads to warping, where corners lift off the plate.
Bed temperature is only half of the picture. It works alongside nozzle temperature, and high-temperature materials usually also need an enclosure to hold the heat around the part.
Use the values on your filament’s spool or in its slicer profile as your starting point. Brands differ, and the right setting also depends on the build plate surface you use.