Best 3D Printer and CNC adjust tool app. Calculate your 3D printer or CNC machine needed steps per millimeter to make your machine accurate. Suitable with belt and threaded rod driven machines. Features • Calculate steps per millimeter with pulleys and belts • Calculate steps per millimeter with threaded rod / screw driven systems • Fine tuning tool to make fine tune after initial mathematical calculation You can use this tool to adjust any kind of 3D priter from rep rap printers to cnc routers and other thepper motor driven applications.