Restore Your Bambu Lab H2S Precision Extrusion Control with the Original Eddy Current Coil FAC185 Does your Bambu Lab H2S show signs of poor surface quality inconsistent extrusion or failed automatic calibration The Eddy Current Coil FAC185 is the genuine original factory part designed exclusively for the H2S to restore its advanced pressure sensing and automatic PA calibration capabilities. What Is the Eddy Current Coil This original component is mounted on the H2S extruder above the hotend. It is a high resolution eddy current sensor that measures nozzle pressure in real time during printing. Working together with the extruder servo motor, this sensor enables the H2S to automatically calibrate Pressure Advance parameters for each filament without manual intervention. Core Functions and Benefits Function One Real Time Nozzle Pressure Detection This high resolution eddy current sensor continuously monitors pressure at the nozzle during printing. It detects melted filament conditions and tracks nozzle status, providing critical data for the printer control system. Function Two Automatic PA Calibration for Each Filament Different filaments require different Pressure Advance settings. This eddy sensor works with the H2S extruder servo motor to automatically measure nozzle pressure and calibrate PA parameters for each filament. No more manual calibration tests or guesswork. Function Three Even Surfaces and Crisp Edges By enabling precise extrusion control, this sensor ensures that every layer goes down with optimal flow. The result is smoother surface finish and sharper edge definition on all your prints, regardless of filament type. Function Four Prevents Extrusion Issues and Clogs When the eddy current coil detects flow anomalies, the printer can adjust in real time to prevent clogs and failed prints. If the sensor is damaged or malfunctioning, the H2S loses this critical feedback loop, leading to poor print quality and unreliable extrusion. Function Five Factory Original Quality with Proper Installation This OEM factory spare part FAC185 includes the eddy current coil and two M2x6.5 BT2-6.5 fixing screws. Installation follows the official Bambu Lab Wiki guide using an H1.5 Hex Wrench and takes about 25 minutes. Critical installation notes: the gap between the coil and hotend heatsink must be between 0.15mm and 0.5mm. When disconnecting the old coil, always lift the small plug straight up perpendicular to the board. Never pull or twist sideways to prevent damage to the plug and circuit board. When Do You Need to Replace This Part Bambu Lab official technical support confirms the eddy current coil needs replacement The eddy current coil is physically damaged Automatic PA calibration consistently fails or produces poor results Surface quality has degraded with uneven layers or blurred edges You are performing extruder or hotend maintenance and found the sensor damaged Compatibility Designed exclusively for Bambu Lab H2S. Original OEM factory part FAC185. Not compatible with H2D H2C P2S or other models. Package Includes Eddy current coil x1 M2x6.5 BT2-6.5 fixing screws x2 Important Note Always power off and unplug your H2S printer before performing any maintenance. When handling the small plug connection to the extrusion main board, always lift straight up perpendicular to the board. Avoid pulling or twisting sideways to prevent damage. Why Choose the Original Factory Part FAC185 Aftermarket eddy sensors may lack the specific calibration characteristics required by the H2S firmware. Using the genuine original Eddy Current Coil ensures perfect compatibility accurate pressure detection and full automatic PA calibration functionality. Restore your H2S to factory level extrusion control with the official replacement part