Joy-it Ard-CNC-Kit1 Manual de usuario

CONTROLLER BOARD CNC

4x A4988 motor driver for Arduino Uno

Joy-IT powered by SIMAC Electronics GmbH - Pascalstr. 8 - 47506 Neukirchen-Vluyn - www.joy-it.net

1. GENERAL INFORMATION

2. SAFETY INSTRUCTIONS

Dear Customer,

Thank you for choosing our product. In the following, we will show you what

to consider during commissioning and use.

If you encounter any unexpected problems during use, please feel free to

With this set you lay the foundation for installing a custom CNC router. The

controller board is suitable for use with the Arduino Uno or Arduino Uno

compatible boards and can be operated with 12 to 36 V as required. Up to 4

axes can be controlled with the included A4988 motor drivers.

The expansion board is easy to drive as it is 100% GRBL compatible.

Since potentially dangerous machines can be controlled with this expansion

board, please observe the following safety instructions:

Never reach into the machining area while the machine is running.

Do not remove chips by hand. Use aids such as brushes, hand brushes or

compressed air for this purpose. Never change tools or workpieces while the

tool spindle is running. Make sure that the workpieces are adequately secu-

red so that the resulting load, e.g. during drilling or milling, can never move

the workpiece out of its position. Never leave the machine running unatten-

ded! Always keep a suicient safety distance to the running machine.

Use the ARD-CNC-Kit1 only in dry environments.

When using components of other manufacturers, please inform yourself

about their safety regulations and observe them.

We are not liable for damages in case of improper use.

3. PIN ASSIGNMENT

4. MICROSTEPS

To determine the step size for the motors, you can make a setting via jum-

pers on the main board. The corresponding pins are marked in the following

picture.

Jumper positioning for microsteps

M0 M1 M2 MICROSTEPS

Yes No No Half step

Yes Yes No 1/8 step

No Yes No 1/4 step

No No No Whole step

Yes Yes Yes 1/16 step

Anschluss

Motortreiber Anschluss

Motor I2C

Endpositionsschalter

Spindel aktivieren

Spindel steuern

Kühlung aktivieren

Abbrechen

Halten

Fortsetzen

Not-Aus

Jumper für

Mikroschritte

Stromver-

sorgung

Achse

klonen

Motor-

steuerung

Enable

Reset Taste

UART

5. ADJUSTING THE MOTOR DRIVER

5.1 Dierent resistors

Please note that the motor drivers of the CNC kit must rst be adapted to

the motors to be operated before they can be used. The adaptation must

be carried out in order not to cause any damage to the motors or the motor

drivers themselves in the long run.

For this you have to pay attention to certain resistors on the motor driver

boards, as you will see in the following picture, because these are needed to

determine to which value the rotary potentiometer has to be set.

5.2 Calculation of the value to be set

In order to be able to calculate to which mV value the rotary potentiometer

must be set, we calculate:

VREF (reference voltage) is the value that must be set on the rotary

potentiometer.

rotary potentiometer.

IMAX (rated current) can be found in the data sheets of the motors you want to

use.

RCS (Current Sense Resistor) is the value of the resistors marked in the picture

above.

VREF = 8 * IMAX * RCS

There are dierent variants of the A4988 motor drivers, so there are also

dierent resistors with dierent values. The most common variants use the

resistors R050

(0.05 Ohm)

, R100

(0.1 Ohm)

and R200

(0.2 Ohm)

5.3 Measuring the value to be set

To now be able to set the rotary potentiometer correctly, you will need a

multimeter, a cable with crocodile clips and a conductive screwdriver.

6. CONNECTING THE EXPANSION BOARD

The ARD-CNC-Kit1 supports the Arduino Uno and Arduino Uno compatible

boards.

The CNC expansion board is simply plugged onto your Arduino Uno. It needs

an additional power supply between 12 V and 36 V.

ATTENTION!!!

Pay attention to the correct orientation of the A4988 motor driver,

otherwise it will be damaged.

Place the motor driver on your CNC board as shown in the following

picture.

7. EXAMPLE CODE

On the following page you can have a code example with which you can

easily test your CNC kit. Please copy the code completely into your Arduino

IDE.

ATTENTION !!!

No end position detection, the motors do not stop automatically.

You must set the multimeter to the setting (V DC voltage). Next, you need to

attach the alligator clip cable with one side to the positive measuring tip of

the multimeter and with the other side to the metal of the screwdriver. With

the negative measuring tip of the multimeter, go to the nearest GND of the

PCB. Now you can read on your multimeter how much voltage is coming to

your motor driver. To increase the voltage you must turn the screwdriver

clockwise and to decrease the voltage turn it counterclockwise.

#dene EN 8 /* Enable pin for all stepper outputs */

#dene X_DIR 5 /* Direction pin for X-axis */

#dene X_STEP 2 /* Step pin for X-axis */

#dene Y_DIR 6 /* Direction pin for Y-axis */

#dene Y_STEP 3 /* Step pin for Y-axis */

#dene Z_DIR 7 /* Direction pin for Z-axis */

#dene Z_STEP 4 /* Step pin for Z-axis */

#dene A_DIR 13 /* Direction pin for A-axis */

#dene A_STEP 12 /* Step pin for A-axis */

int Count = 0; /* Counter to count the steps made */

boolean Direction = LOW; /* Rotation direction of the stepper

motors */

void setup()

{

Serial.begin(9600);

/* Pins of the motor drivers are congured as outputs */

pinMode(EN, OUTPUT);

pinMode(X_DIR, OUTPUT);

pinMode(X_STEP, OUTPUT);

pinMode(Y_DIR, OUTPUT);

pinMode(Y_STEP, OUTPUT);

pinMode(Z_DIR, OUTPUT);

pinMode(Z_STEP, OUTPUT);

pinMode(A_DIR, OUTPUT);

pinMode(A_STEP, OUTPUT);

digitalWrite(EN, LOW); //Low to activate

}

void loop()

{

/* Count one step */

Count++;

/* When 500 steps have been reached, change the direction

and reset the counter. */

if (Count >= 500)

{

Direction = !Direction;

digitalWrite(X_DIR, Direction); // Low = CW

digitalWrite(Y_DIR, Direction); // Low = CW

digitalWrite(Z_DIR, Direction); // Low = CW

digitalWrite(A_DIR, Direction); // Low = CW

Count = 0;

}

/* Step the X, Y, Z, and A motors */

digitalWrite(X_STEP, HIGH);

delay(1);

digitalWrite(Y_STEP, HIGH);

delay(1);

digitalWrite(Z_STEP, HIGH);

delay(1);

digitalWrite(A_STEP, HIGH);

delay(1);

digitalWrite(X_STEP, LOW);

delay(1);

digitalWrite(Y_STEP, LOW);

delay(1);

digitalWrite(Z_STEP, LOW);

delay(1);

digitalWrite(A_STEP, LOW);

delay(1);

}

www.joy-it.net

Simac Electronics GmbH

Pascalstr. 8 47506 Neukirchen-Vluyn

Published: 04.24.2023

9. SUPPORT

We are also there for you aer the purchase. If any questions remain or

problems arise, we are also available to assist you via email, phone and

ticket support system.

E-Mail: servic[email protected]t

Ticket-System: http://support.joy-it.net

Phone: +49 (0)2845 9360 - 50 (10 am - 5 pm)

For more information, please visit our website:

www.joy-it.net

8. INFORMATION & TAKE-BACK OBLIGATIONS

Our information and take-back obligations under the Electrical

and Electronic Equipment Act (ElektroG).

Symbol on electrical and electronic equipment:

This crossed-out trash can means that electrical and electronic equipment

does not belong in household trash. You must hand in the waste equipment

at a collection point. Before dropping o, you must separate used batteries

and accumulators that are not enclosed by the waste equipment from it.

Return options:

As an end user, when you purchase a new device, you may return your old

device (which performs essentially the same function as the new device

you purchased from us) for disposal at no charge. Small appliances with

no external dimensions larger than 25 cm can be returned in household

quantities regardless of the purchase of a new appliance.

Possibility of return at our company location during opening hours:

SIMAC Electronics GmbH, Pascalstr. 8, D-47506 Neukirchen-Vluyn, Germany.

Possibility of return in your area:

We will send you a parcel stamp with which you can return the device to us

free of charge. To do so, please contact us by e-mail at [email protected] or

by phone.

Packaging information:

Please pack your old device securely for transport, if you do not have suitable

packaging material or do not wish to use your own contact us and we will

send you suitable packaging.

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