How often should bed leveling be done in FDM printing?

In Fused Deposition Modeling (FDM) printing, bed leveling is a critical process that ensures the first layer of the print adheres properly to the build surface. Performing bed leveling before each print is ideal because it compensates for any potential discrepancies in the bed's surface or the printer's alignment that may occur over time. Factors like temperature fluctuations, filament type, or even slight mechanical shifts can affect the levelness of the build plate. When the bed is perfectly level, it allows for consistent layer adhesion, which is crucial for the success of the print, reducing the risk of warping or detachment during the printing process.

Additionally, each print's requirements may vary based on factors such as the type and temperature of the material being used, which can influence how it interacts with the build surface. Therefore, leveling the bed each time before a print ensures optimal conditions for adhesion and helps to achieve higher-quality prints. Referring to other times for leveling, such as once a week or after a set number of prints, may not account for daily variability in the printer's operation or environmental conditions, which could lead to a decrease in print quality.