Bed leveling

Bed leveling is the process of bringing a 3D printer's build plate into the correct relative position to the nozzle across the whole surface so that the first layer prints uniformly. For makers working in a fablab or makerspace, it is a fundamental calibration step to ensure good adhesion and reliable prints. There are manual methods (for example using a piece of paper and adjusting screws) and automatic methods (such as BLTouch or inductive/proximity sensors that probe the bed to build a mesh); both approaches ensure the firmware and slicer use correct Z heights during printing.

A common practical workflow in a makerspace: heat the bed and nozzle to printing temperature, disable the stepper motors and move the nozzle to the first corner. Place a sheet of paper between the nozzle and bed and turn the adjustment screw until you feel light resistance; repeat for all four corners and then check the center. Next set the Z‑offset via the printer controls and save the settings to firmware; run a first‑layer calibration print (for example a single‑layer test strip) to verify uniform deposition. On a printer with automatic bed leveling, run the probe routine to create a mesh height map and then tweak the Z‑offset if the center or edges still need small adjustments.