Ks0094 Arduino CNC kit / CNC Shield V2.0 +keyestudio Uno R3+3pcs A4988 Driver / GRBL Compatible
Arduino CNC kit / CNC Shield V2.0 +keyestudio REV4+3pcs A4988 driver / GRBL compatible
Introduction
Keyestudio CNC Shield V2.0 can be used as driver expansion board for engraving machines. It has in total 3 channel slots for A4988 stepper motor driver modules (not included) for driving 3 channel of stepper motors. Each channel of stepper motor only needs 2 IO ports, which means 6 IO ports is sufficient to manage 3 stepper motors. This shield can make quick work for managing stepper motors in your project.
CNC Shield V2.0 features
- Keyestudio CNC Shield Version 2.0
- GRBL 0.8c compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)
- 3-Axis support (X, Y, Z , )
- 2 x End stops for each axis (6 in total)
- Spindle enable and direction
- Coolant enable
- Uses removable A4988 compatible stepper drivers. (A4988, DRV8825 and others)
- Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
- Compact design.
- Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
- Runs on 12V DC.
Kit list
- 1x CNC Shield V2.0
- 1x keyestudio R4V4 board
- 3x A4988 driver
- 1x USB cable
Connection Diagram
Adjusting the drive current
In the kit, we have applied the A4988 drive module to drive stepper motor. When using, you can turn the potentiometer on the drive module to adjust the drive current.
The specific method please refer to the website link below:
https://wiki.keyestudio.com/Ks0281_Keyestudio_Reprap_Stepper_Motor_Driver
Install Driver Software and Development Environment Software IDE
Install Diver Software
For different operating system, there may be slight difference in installation method. Below is an example in WIN 7.
When you connect Arduino Uno to your computer the first time, right click “Computer” —>“Properties”—> “Device manager”, you can see “Unknown devices”.
Click “Unknown devices”, select “Update Driver software”.
In this page, click “Browse my computer for driver software”.
Find the “drivers” file.
Click “Next”; select “Install this driver software anyway” to begin the installation.
Installation completed; click “Close”.
After driver is installed, go to “Device manager” again. right click “Computer” —> “Properties”—> “Device manager”, you can see UNO device as below figure shows, also the correct Com port.
Install development environment software IDE
Double click arduino-1.5.6-r2-windows to start.
Select “I Agree”to accept license agreement.
Select components to install and click “Next”.
Click “Browse” and select another folder. Click “Install” to start the installation.
Finally, wait for a few minutes to finish.
Using Method
Test Main Board
First, write below code in IDE to test whether main board, shield and three motors work normally.
Explanation
1. If you properly reduce the value 800 in delayMicroseconds(800) to increase the frequency of input PWM signal, you can increase the rotation speed of stepper motor. The change of value cannot be too much or the motor will stop moving.
2. Rotate the knob on A4988, you can adjust the output current of the motors to change the torque.
Code
#define EN 8 // stepper motor enable, low level effective #define X_DIR 5 //X axis, stepper motor direction control #define Y_DIR 6 //y axis, stepper motor direction control #define Z_DIR 7 //zaxis, stepper motor direction control #define X_STP 2 //x axis, stepper motor control #define Y_STP 3 //y axis, stepper motor control #define Z_STP 4 //z axis, stepper motor control /* // Function: step -control the direction and number of steps of the stepper motor // Parameter: dir -direction control, dirPin corresponds to DIR pin, stepperPin correspomds to step pin, steps is the number of steps. // no return value */ void step(boolean dir, byte dirPin, byte stepperPin, int steps) { digitalWrite(dirPin, dir); delay(50); for (int i = 0; i < steps; i++) { digitalWrite(stepperPin, HIGH); delayMicroseconds(800); digitalWrite(stepperPin, LOW); delayMicroseconds(800); } } void setup(){// set the IO pins for the stepper motors as output pinMode(X_DIR, OUTPUT); pinMode(X_STP, OUTPUT); pinMode(Y_DIR, OUTPUT); pinMode(Y_STP, OUTPUT); pinMode(Z_DIR, OUTPUT); pinMode(Z_STP, OUTPUT); pinMode(EN, OUTPUT); digitalWrite(EN, LOW); } void loop(){ step(false, X_DIR, X_STP, 3200); // x axis motor rotates CCW for 1 circle, as in 200 steps step(false, Y_DIR, Y_STP, 3200); // y axis motor rotates CCW for 1 circle, as in 200 steps step(false, Z_DIR, Z_STP, 3200); // z axis motor rotates CCW for 1 circle, as in 200 steps delay(1000); step(true, X_DIR, X_STP, 3200); // X axis motor rotates CW for 1 circle, as in 200 steps step(true, Y_DIR, Y_STP, 3200); // y axis motor rotates CW for 1 circle, as in 200 steps step(true, Z_DIR, Z_STP, 3200); // z axis motor rotates CW for 1 circle, as in 200 steps delay(1000); }
Install Firmware and Grbl Controller
a. Write test program to keyestudio REV4
copy the folder GRBL_ Arduino_Library_keyes in the data packet and paste it into to the folder libraries, in your Arduino IDE document installation.
Code
#include <grblmain.h> void setup(){ startGrbl(); } void loop(){} //
Compile the code above to keyestudio REV4 via IDE.
b. Install GrblController361 Software
Grbl Controller is a piece of software which is used to send GCode to CNC Machines. Run Grbl Controller361 Setup in your installation packet, the interface below will come out:
Click Next to continue.
For a license agreement, please check I accept the agreement and click Next.
When you are ready to continue with Setup, click Next.
To continue, click Next. If you would like to select a different folder to install, click Browse.
To continue, click Next. If you would like to select a different folder to place program’s shortcuts, click Browse.
Select the additional tasks you would like Setup to perform while installing Grbl Controller, then click Next.
Click Install to continue with the installation.
At last, click ”Finish” to finish the installation.
c. Test G-Code on Grbl Controller
Power the main board using a USB cable and connect correctly all your external devices, then run Grbl Controller.
Choose Port name the same as IDE COM port and click “Open” to open the series port, connecting CNC Machines with computer.
After opening the series port, the “Open” button change into “Close/Reset” and get red!
At this time you can click the X axis、Y axis、Z axis as shown in below diagram to adjust the motion direction of motors.
Note: after adjusting the axies, before beginning G-Code file, you must close and open again .
Now, it is time to have a try! Click ”Choose file” to choose one G-Code file named cn. to test in the data packet for a beginner, and the interface will come out:
GrblController.
Click “Begin” , and you can see how the motors move on coordinates.
Resources
Arduino IDE Download
https://www.arduino.cc/en/Main/Donate
GRBL_Arduino_Library_keyes (Firmware) Download
https://drive.google.com/open?id=1neHO3q_VgFfVWX9faiWIXn-bzbaJEGSc
Driver Download
https://drive.google.com/open?id=17MNGCrhPn9Cuh2GDlIwjFVEkKHEWqYaU
G-Code for Testing Download
https://drive.google.com/open?id=1mPVGFbgHaMH2kgoS8vjiZs10gXZ2SLAv
Grbl Controller361 Setup Download
https://drive.google.com/open?id=1JSCtHr7FLF7UMxXeVGpwMbWn3BVZo7jh
Datasheet
https://drive.google.com/open?id=1Bl28zHPYR4iPAj3OTds8bwgeMdKgguPg
Buy from
Offical Website https://www.keyestudio.com/free-shipping-keyestudio-cnc-kit-for-arduino-cnc-shield-v2uno-r33xa4988-grbl-compatible-p0289-p0289.html