3D printing method based on force feedback system

Abstract

The invention discloses a 3D printing method based on a force feedback system. The method includes the following steps that firstly, when printing is started, a motor drives a forming platform to begin to move downwards, and the force feedback system controls the forming platform to successfully find the bottom; secondly, exposure printing of a first layer is carried out; thirdly, after exposure is finished, the forming platform moves upwards for stripping, and meanwhile the current stripping force CurrentForce is compared with a threshold value MaxForce set in the current state of the force feedback system; fourthly, if CurrentForce>=MaxForce, the forming platform stops moving upwards or moves upwards in a decelerating mode, and the fifth step is executed, and if CurrentForce<MaxForce, the forming platform continues moving upwards, and the sixth step is executed; fifthly, MaxForce is automatically increased by a scale value, and the fourth step is executed again; sixthly, the forming platform stops when moving upwards to a set height distance, and stripping is completed; seventhly, the motor drives the forming platform to move downwards again for exposure printing of a next layer; eighthly, the third step to the seventh step are repeated till printing of a printout is completed. By means of the force feedback system, the printing process is more intelligent, and the printing success rate and the printout quality are greatly improved.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing method based on a force feedback system. Background technique [0002] The working principle of 3D printers is basically the same as that of ordinary printers. It is to superimpose layers of "printing materials" through computer control, and finally turn the model on the computer into a real object. This is a technological revolution that subverts traditional manufacturing processes. [0003] However, in traditional DLP 3D printing, the contact and separation between the forming platform and the bottom of the material tray has always been a big problem. Because after each contact exposure molding, it can be said that the bottom of the material plate and the forming platform are adhered together. Next, in order to continue printing, it is inevitable that each layer must be peeled off once, that is, the bottom part of the forming platform and the material plate. Leaving as...

AI Technical Summary

Problems solved by technology

[0003] However, in traditional DLP 3D printing, the contact and separation between the forming platform and the bottom of the material tray has always been a big problem

Because after each contact exposure molding, it can be said that the bottom of the material plate and the forming platform are adhered together. Next, in order to continue printing, it is inevitable that each layer must be peeled off once, that is, the bottom part of the forming platform and the material plate. Leaving aside, the traditional printing equipment does not calculate the peeling strength according to the size of the printing area, but always peels directly at a fixed speed, which often causes printing failure due to too fast separation; in the first DLP printing Before layering, the forming platform needs to be in full contact with the bottom of the material tray, that is, to find the bottom. In traditional DLP printing, the process of finding the bottom can only be completed with the cooperation of human eyes, and there is no way to guarantee the accuracy, which may lead to subsequent printing failures.

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