Laser ranging module and ranging method

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of 3D printers, in particular to a laser ranging module and a ranging method. Background technique [0002] Most of the existing 3D printers use the method of downward zero adjustment, but the current zero adjustment effect is not ideal. Fused deposition rapid prototyping (FDM) is one of the main 3D printing technologies. FDM technology, also known as hot melt Stacking technology, this technology is to heat and melt the hot-melt filament and extrude it from the nozzle, deposit it on the printing platform or the previous layer of solidified material, when the temperature is lower than the solidification temperature of the filament, it will start to solidify and form, and finally print Therefore, the printing of the first layer of the model directly affects the modeling effect of the subsequent model, and the coordination of the distance between the printing extrusion head and the printing platform and the amo...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing 3D printers use the method of downward zero adjustment, but the current zero adjustment effect is not ideal. Fused deposition rapid prototyping (FDM) is one of the main 3D printing technologies. FDM technology, also known as hot melt Stacking technology, this technology is to heat and melt the hot-melt filament and extrude it from the nozzle, deposit it on the printing platform or the previous layer of solidified material, when the temperature is lower than the solidification temperature of the filament, it will start to solidify and form, and finally print Therefore, the printing of the first layer of the model directly affects the modeling effect of the subsequent model, and the coordination of the distance between the printing extrusion head and the printing platform and the amount of extrusion material (the layer height of the first layer of printing) directly affects the first layer. layer printing effect, so the machine's zero-adjustment technology is very important. For the case of upward zero-adjustment, that is, the Z-axis limit switch Z-axis maximum value, an important step to realize the automatic zero-adjustment function is close-range accurate measurement. The demand for accuracy and cost is high. At present, most of the existing methods are ultrasonic and laser radar methods. However, the high-precision cost of this distance measuring instrument is very high, and the low-cost distance measuring device cannot meet the accuracy requirements of the print head. And most of the equipment is not easy to install to the print head

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