First Layer is Most Important

The first layer of a 3D print is arguably the most critical, as it sets the foundation for the entire part. If the first layer does not adhere properly to the build plate or is unevenly extruded, the print can fail as subsequent layers rely on a stable and consistent base. Too large a gap between the nozzle and the bed can lead to poor adhesion, resulting in warping or layer shifting, while a nozzle too close to the build plate risks scraping or damaging the surface, potentially ruining both the plate and the print. A well-laid first layer ensures proper bonding and dimensional stability, significantly increasing the chances of a successful print.

Modern 3D printers have made significant advancements with features like automatic bed leveling and initial Z-height calibration, which greatly reduce the chances of first layer issues and save users from manual tweaking. These automated systems help ensure the nozzle height and bed level are optimized before printing starts. However, despite these improvements, it is still highly recommended to monitor the first layer closely, especially when trying a new material, changing build plates, or printing after maintenance. Confirming the first layer prints correctly before leaving the printer unattended remains best practice to prevent print failures and protect your hardware.