A system, method and computer program product for detecting filament jams and filament runout conditions on Fused Deposition Modeling (FDM) 3D printers, including a filament feed sensor configured to detect feeding of a filament by a filament drive motor and provide a feeding status thereof; a filament drive motor sensor configured to detect movement of the filament drive motor and provide a movement status thereof; and a processor configured to compare the feeding status and the movement status to detect at least one of a filament jam and filament runout condition on a Fused Deposition Modeling (FDM) 3D printer.

Disclosed herein is a method and associated adjusting system for adjusting the sensor sensitivity of a motion sensor for detecting movement of a pile yarn in a tufting machine, provided with several tufting needles, where this pile yarn is incorporated into a fabric. The method includes determining current process data, providing reference data for the sensor sensitivity of the motion sensor, including one or more sets, where each includes a value of a reference sensor sensitivity and corresponding process data, determining a connection between the current process data and the process data of the provided reference data, determining a value for the sensor sensitivity to be adjusted on the basis of this connection and the one or more values of the reference sensor sensitivity of the provided reference data, and adjusting the value for the sensor sensitivity to be adjusted in the motion sensor.