ANYCUBIC KOBRA 2 NEO Broken

Inductive Proximity Sensor (ABL Probe)

The inductive sensor contains an internal copper coil and a Schmitt trigger circuit that can fail due to thermal cycling and high-frequency vibrations from the toolhead. When the internal oscillator fails, the sensor can no longer detect the metallic build plate, preventing the printer from establishing a Z-axis zero point. This component is the primary failure point in the auto-leveling system.

Toolhead Ribbon Cable

Constant reciprocating motion of the print head leads to copper work-hardening and eventual fatigue failure of the thin signal wires within the ribbon cable. A fracture in the specific conductor dedicated to the proximity sensor signal will mimic a hardware failure of the sensor itself by preventing the trigger logic from reaching the mainboard.

PEI Spring Steel Build Plate

Inductive sensors require a ferrous or conductive metallic substrate to function. If the build plate is significantly warped, or if a non-metallic surface (like glass) has been installed over the metal, the sensor's electromagnetic field will not produce the required eddy currents to trigger the sensing logic, appearing as a 'broken' sensor.