The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328P; offers the same connectivity and specs of the UNO board in a smaller form factor. All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor, no need to install anything. Arduino Nano (V3.0) User Manual Released under the Creative Commons Attribution Share-Alike 2.5 License. Microsoft Word - ArduinoNano30.docx Author: PAN.

Overview

CNC Shield V4.0 can be used as a drive expansion board for engraving machines and need to be used with Arduino NANO. There’re 3 slots in the board for stepper motor drive modules, can drive 3 stepper motors, and each step stepper motor only need two IO port, that is to say, 6 IO ports can quite well to manage three stepper motor, it’s very convenient to use.

CNC Shield V4.0 has some GPIO of Arduino NANO, it’s convenient for connect other modules, like limit switch. Also, CNC Shield V4.0 also has I2C interface, you can connect LCD screen which has the I2C interface.
The input voltage of CNC Shield V4.0 is DC 7.5V-12V, do not higher than 12V.

Hardware installation

We use A4988 as the motor driver, A4988 support 1 segment, 1/2 segment, 1/4 segment, 1/8 segment, 1/16 segment. Each segment is set by the MS0、MS1、MS2 pin header in the CNC Shield V4.0, cover the jumper cap to the pin header represents high level, do not cover the jumper cap represents low level.

Each segment is specified set as shown in the following table:

MS1	MS2	MS3	Microstep Resolution
Low	Low	Low	Full step
High	Low	Low	Half step
Low	High	Low	Quarter step
High	High	Low	Eighth step
High	High	High	Sixteenth step

In order to improve the precision of engraving, use 1/16 segment, it needs 3 jumper caps to cover MS0、MS1、MS2. As shown in picture:
After finished the above steps, you need to plug A4988 and Arduino NANO into CNC Shield V4.0, please ensure it’s the correct direction of A4988 and Arduino NANO, or it may burn your devices.
You can reference for the following picture:

The installation of other equipment (such as limit switch, laser head) should be installed according to the actual situation.
Software installation
1) Install the grblmain library file and burn program

Download and unzip grblmain.zip, and then replace config.h in grblmain folder, the new config.h: https://osoyoo.com/wp-content/uploads/2017/04/config.h

Place the grblmain folder to libraries in Arduino IDE installation directory.

Open Arduino IDE, choose File->Examples->grblmain->GRBLtoArduino, you’ll open a grbl sample program, select the port and board type, burn this grbl sample program to Arduino NANO.

2) Install Grbl Controller

Download and install Grbl Controller，open it, interface as shown in picture:

Use the USB cable to connect your PC and Arduino NANO, select the port and select the baud rate as 9600. Click “Open”, if it connected, “Open” will be “Close/Reset “, the background is red. Click “Choose File” to choose the graphy you want to engrave, after selected click “Begin” to engrave.

Description:-

Arduino NANO Version 3 is the open source smallest Embedded Development board launched by Arduino based on Atmega328 SMD Package Microcontroller. It is a Surface mount Breadboard Friendly board integrated with Mini USB Port. DC Power Jack is not available on this Board, so power can be given through Mini USB Cable. It automatically sense and switch to the higher potential source of power, there is no need for the power select jumper.

Specifications:-

• Microcontroller Atmel ATmega328 SMD Package
  
• Operating Voltage (logic level) 5 V
  
• Input Voltage (recommended) 7-12 V
  
• Input Voltage (limits) 6-20 V
  
• Digital I/O Pins 14 (of which 6 provide PWM output)
  
• Analog Input Pins 8
  
• DC Current per I/O Pin 40 mA
  
• Flash Memory 32 KB (of which 2KB used by bootloader)
  
• SRAM 2 KB
  
• EEPROM 1 KB
  
• Clock Speed 16 MHz
  
• Dimensions 0.70” x 1.70”
  

Arduino Nano V3.0 Driver

Arduino Nano V3.0 Pinout

User Manual:-

Arduino Nano V3.0 Schematic

* Product Images are shown for illustrative purposes only and may differ from actual product.

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