The invention provides a
laser ranging module and
ranging method, belongs to the technical field of 3D printers, and aims at solving the problems that a
ranging device cannot meet the precision requirement of a printing head and most of the equipment is too large to fit the printing head easily. The
laser ranging method comprises the steps: 1, the displacement relation expression between the displacement and the image of the printer object is obtained; 2, the Z-axis coordinate position of the printing platform in the current coordinate
system is obtained, 3, when the upper
computer control program requires to print and transmit a printing file, Z-axis coordinate
processing is performed on the printing file; and 4, the printer prints the received file and realizes printing on the printing platform. The
laser ranging module is installed on the
extrusion head of the printer, the
laser ranging module has a laser, a camera and a
light filter, the laser can emit light beams, the light beamsemitted by the laser directly irradiate to the printing platform of the printer, the camera can capture the light spots irradiated on the printing platform by the laser, and the
light filter is installed on the camera so as to ensure the precision requirement of the printing head.