Stepper Motor

Forum 2005-2010 (read only) Hardware Interfacing
1

I have the boarduino on a breadboard, with a Stepper Motor Driver. The Stepper Motor Driver is the MC3479, and the specs on this driver are on this pdf:

The pins that are connected to my borduino are the CW/CCW pin and the Clk pin. I was hoping i could use the stepper library to control the motor, but that has not worked for me yet. I need help figuring out the code i need to write so that i can control the motor.
Thanks for the help

2

You don't need the stepping motor library with this chip, the chip creates the patterns of on and off the stepping motor needs. Without this chip the software needs to create the patterns and that's what the library does.

To move the motor just pulse the step line first high, then low with a digital write and if it is in a loop do a delay so the pulses are not too fast.

3

What do you mean by the step line? Thanks for the reply.

4

Pin 7 the clock, a pulse on that steps the motor on one step.

5

So would this code be correct:

void setup()
{
pinMode(11, OUTPUT);
}

void loop()
{
digitalWrite(11, HIGH);
digitalWrite(11, LOW);
delay(10);
}

6

Yep that looks fine, maybe increase the delay a little.

I assume the rest of the pins of the chip set up, especially pin 6 (some value of resistor depending on the current you want to drive to ground) . Pins 8, 9 & 10 should be connected either to the Arduino (and set high or low) or to the appropriate logic level if you don't want to control them at the moment. And a 0.1uF capacitor from pin 16 to ground with pins 4,5,12 & 13 all connected to the arduino ground.

7

My pin 16 is connected to a voltage regulator, which is connected to a capacitor. Does that work? Everything else is connected the way they should be.

8

Sounds good to go.

9

Well, its not working for me

10

Is the motor just buzzing when it should be turning?
If it is, the step speed is too high.
The delay time (10) looks too small to me try increasing it as suggested above (maybe 30?).

11

Thanks for all the help, it turns out i had the resistor in positive, rather than ground. It is working well now. Once again thanks for your help.