Direct-current motor and stepper motor combination-driven 3D printer

Abstract

The invention discloses a direct-current motor and stepper motor combination-driven 3D printer. An X-axis fixed guide rail contains a direct-current motor; and a stepper motor is arranged at the inner side of an X-axis mobile guide rail. A linear CCD array is arranged at the contacted part of the X-axis fixed guide rail and an X-axis platform. A direct-current motor is arranged at the inner side of a Y-axis mobile guide rail; a stepper motor is arranged at the inner side of a Y-axis mobile support frame; and a Y-axis linear CCD array support frame contains a linear CCD array. Precise X-axis and Y-axis positions are measured through irradiating the linear CCD arrays with small light sources on the X-axis platform and the Y-axis mobile support frame. After a computer determines next X and Y coordinate positions, the direct-current motors and the stepper motors are selected to be driven according to feeding lengths, and the X-axis and Y-axis coordinate movements can be precisely and quickly controlled according to the position feedbacks of the linear CCD arrays, so that the 3D printing efficiency is largely improved.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printer driven by a DC motor and a stepping motor mixed. Background technique [0002] 3D printer is a rapid prototyping technology that has emerged this year. Its basic principle is to use a computer to perform 3D modeling, and then use the computer to flatten the 3D model into several 2D planes. 3D printing starts from the bottom plane. The two-dimensional plane model is covered with a layer of the material of the three-dimensional object (such as metal powder, plastic, ceramics, etc.) for high-temperature sintering or cooling for solidification. [0003] At present, the movement of the coordinate axis of the 3D printer is generally completed by a stepper motor, because the stepper motor can precisely control the single-step displacement and thus can precisely control the movement of the three axes of the 3D printer. However, when printing on the X and Y axis planes, there may...

AI Technical Summary

Problems solved by technology

However, when printing on the X and Y axis planes, there may be multiple disconnected printing areas on a single plane, and the distance between the two areas to be printed is relatively large. When the current area is printed and the next area needs to be printed, step The stepper motor needs to make a large displacement, but because the speed and response of the stepper motor are relatively slow, a large displacement will take a lot of time, and the printing efficiency will be greatly reduced

The DC motor has the characteristics of high dynamic response and fast speed, but the displacement accuracy cannot be guaranteed if the DC motor is used alone to control the printing displacement, and because the DC motor is difficult to maintain the same speed when controlling the displacement, the printing nozzle will produce uneven material accumulation during spraying, etc. question

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