A non-contact 3D printing consumable state detection method

Abstract

The invention provides a non-contact 3D printing consumptive material state detection method. The method comprises the following steps that S1, consumptive material detection: an LED is used for providing a illumination condition; a CMOS camera is used for conducting continuous photographing on the surface of a illumination conditions through a convex lens; a DSP unit is used for extracting characteristic pixels of each picture, recording the effective characteristic number and calculating the actual displacement increment of the consumptive material in every two adjacent pictures within the time interval by comparing the position change of the same characteristic pixel of the two adjacent pictures; and S2, state judgment of consumptive material cutoff: whether the surface quality index of each picture obtained in the step S1 is greater than a threshold value or not is compared; whether the consumptive material is cut off or not is judged; as for stage judgment of consumptive material blockage, the actual movement increment and target increment error of the consumptive material is greater than a threshold value, and whether the consumptive material is blocked or not is judged. The non-contact 3D printing consumptive material state detection method has the beneficial effects that state detection of the non-contact 3D printing consumptive material is realized; by means of a non-contact measurement method, printing errors caused by mechanical wear contact can be avoided.

Description

technical field [0001] The invention relates to 3D printing, in particular to a method for detecting the state of non-contact 3D printing consumables. Background technique [0002] During the printing process of 3D printers (Fused Deposition Modeling), due to factors such as impurities in consumables, broken consumables, depletion of consumables, and print head failures, the print head does not produce material, resulting in printing failure. This will lead to a waste of time and loss of consumables, which is especially significant when printing large-scale 3D prints. [0003] The traditional 3D printing consumable status detection uses a mechanical switch or a photoelectric tube. When the consumable exists, the mechanical switch is pressed by the consumable, or the photoelectric tube is blocked by the consumable, so as to determine the existence of the consumable. The method of detecting 3D printing consumables by mechanical or photoelectric tubes can only detect the broke...

AI Technical Summary

Problems solved by technology

[0002] During the printing process of 3D printers (Fused Deposition Modeling), due to factors such as impurities in consumables, broken consumables, depletion of consumables, and print head failures, the print head does not produce material, resulting in printing failure.

However, the use of rotary encoding requires hard contact between the consumables and the rotary encoding, resulting in increased damping and deformation of the consumables during the transmission of the consumables, affecting print quality

Images