Periodic health checks of contouring errors under unloaded conditions are critical for machine performance evaluation and value-added manufacturing. Aiming at breaking the dimension. range and speed measurement limitations of the existing devices. a cost-effective knowledge-driven approach for detecting error motions of arbitrary paths using a single camera is proposed. https://www.spidertattooz.com/Metabo-HPT-NT1865DMASTM-18V-MV-15-Gauge-Brushless-Cordless-Angled-Finish-Nailer/