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Design two degrees of freedom to writing robot which can easily complete the task of writing drawing on a plane. You can put in the text entered by computer control algorithms and hardware circuit and the stepping motor drive styluses automatically describe it on paper. PC is chosen as the host computer, the system of Arduino as a slave. The text will be entered into a computer coordinates the G code, the next crew to the controller, the next bit machine controller uses serial port to send by linear interpolation and rounded interpolation algorithm, control pulse and direction output level control step stepping motor forward or backward. Stepper motor is controlled by a pulse, a pulse is sent to each step forward, allowing for precise control of the distance. It can be extended a shaft to join the Z-axis can theoretically achieve 3D printing capabilities, the writing pen or chisel into the laser head can be carved three-dimensional works, expansion of feature-rich.