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Welcome to the 2D-Printer wiki!

Introduction

This project is a realtime writing machine, which enable user to write information remotely. This design controls the movement of the pen on the x and y axes through two stepping motors and the up and down movement of the pen through a servo motor.This Wiki page details how to recreate the machine.

This Realtime 2D printer consists of Acrylic frame, stepper motor
Advantage: total cost is cheaper than other pen plotters

Hardware Design

Bill of Material

BOM for 2D Printer

component	Description	Quantity	Supplier
NEMA-17	Stepper motor	2	onecall MC02060
SG90	Micro servo motor	1	eBay
Stepper motor coupler	Flexible shaft couplings 5mm to 8mm stepper motor coupler aluminium alloy joint connector	2	Amazon
Screw rod	200mm 3D printer T8-2 8mm lead threaded screw rod linear rail bar shaft	2	Amazon
Brass nut	Dia 22mm Brass 8mm 4-Start Flange Nut for CNC 3D Printer Rod Lead Screw	4	Amazon
M8 hexagon nut	Toolcraft Hexagon Nuts DIN 934 Galvanised Steel 8 M8	4	Rapid 51-3428
Stainless steel solid rod	250mm*5mm	2
Type ①②③④ acrylic board	The corresponding size and quantity can be found in datasheet	10

BOM for PCB

component	Description	Quantity	Supplier
L293DNE	Quadruple high current half-H driver	2	onecall 1470423
CTB0500/2	2 way 14 A low profile interlocking terminal block	5	Rapid 21-1540
CTB0500/3	3 way 14A low profile interlocking terminal block	1	Rapid 21-1545
M20-6102045	2.54mm pitch PC/104 40 connectors	1	Farnell 1569230
10ML100MEFC6.3X5	Electrolytic Capacitor, Miniature, 100 µF, 10 V, ML Series, ± 20%, Radial Leaded, 6.3 mm	1	Farnell 8126160

Wiring Diagram

Servo Motor Control	Motor Driver Board Control	Stepper Motor Control
Raspberry Pi Servo Motor Pin4(Power) 5V Pin12(GPIO1) Signal Pin20(Ground) Ground	Raspberry Pi L293D Drive Board Pin31(GPIO22)/Pin32(GPIO26) Pin2(1A) Pin33(GPIO23)/Pin36(GPIO27) Pin7(2A) Pin35(GPIO24)/Pin38(GPIO28) Pin10(3A) Pin37(GPIO25)/Pin40(GPIO29) pin15(4A)	L293D Drive Board Stepper Motor pin3(1A) Red Pin6(2A) Green Pin11(3A) Yellow Pin14(4A) Gray

PCB Design

~~the doc link~~~

Conclusion

*现况分析 around 40ms delay, the movement of 鼠标（显示器上图形会和实际绘画的图像有偏差）现在电机运行基于像素比较，实际运行中鼠标运动速度和电机运行速度不匹配，
*未来提升 pcb 无稳压源，电压随运行时间降低，导致电机运行 需要稳压源增加电源电压 控制笔换成更稳定的机械结构

Team Coordination

• Wei Zhang - Hardware and software designer
• Honghao Wang - Researcher and film editor
• Huanyu Zhang - GitHub maintenance and material purchase

Social Media

• YouTube