Need specifications to operate this stepper motor with RPi or Arduino

arduinoraspberry pispecificationsstepper motor

Here is the disassembled stepper motor that I'm working with:

I need to identify this stepper motor that was retrieved from scrap for a project. Budget constraints force us to use the scrap motor. I tried to drive this using a L298 H Bridge, but I couldn't find the right bit sequences to get this running smoothly. I also tried to search for a specifications sheet in the internet with the label, unsuccessfully.

I'm using either an RPi or Arduino board to run this.

I just need a pin diagram and the specifications of the motor, if you guys have seen this type before.

Best Answer

You should be able to Ohm-out the connections. You have 5 points that will be connected to a set of coils somehow. Figure each coil will have the same DC resistance, so by measuring the resistances between various combinations and comparing then, you can find out how many coils are in the path between any two leads. From that you can probably determine how the coils are arranged.

Usually these motors have three coils connected in one place, so a total of 4 connections. Maybe yours has 4 coils, or maybe just a chassis ground wire or something. Given that 8 coils are visible in the picture, I'd guess you have 4 separate windings with one common. Again, Ohming it out should answer these questions.

Once you find how to energize individual coils, try each separately and observe where the rotor goes. The movements will be small, but you should be able to figure out the sequence.

Then you need to determine the maximum current it can handle. The limiting factor is how hot it gets. Try a few currents. Run it at each current for a few minutes or until you think it gets too hot. There is no size reference in your picture, but I'd probably start with 1 A and then go from there after seeing how warm it gets. With everything closed up, a conservative temperature is if you can just about hold the motor in your hand for 10 seconds or so. The inside will be hotter, but if the outside is just at the human discomfort level, then it should be fine.

Related Solutions

Electronic – L297 stepper motor driver inhibit issue

pull down the control pin(11) to gnd.

Edit: From the Datasheet:

11
CONTROL
Control input that defines action of chopper. When low chopper acts on INH1 and INH2; when high chopper acts on phase lines ABCD.

Electronic – arduino – L297 + L298 circuit not working

Try this code, and change pin number to your like. if this code work, likely the problem is in the delayMicroseconds number, some Stepper motor only work on higher than 300 and some on more higher number. when delayMicroseconds number too low, it will stall and sometime only humming.

when powerup, motor will spin clockwise, and if you push button, it's will delay 1 second, and start spin counterclockwise.

int val = 0; // push value from buttons pin
int jalan = 0;//moving status
int ditekan = 0;//push status
void setup() 
{
  pinMode(12, OUTPUT); //Enable
  pinMode(11, OUTPUT); //Step
  pinMode(10, OUTPUT); //Direction
  pinMode(4, INPUT); //push button

  digitalWrite(12,LOW);

}

void loop() 
{
  val = digitalRead(4);// read the push button value
  if(val == HIGH){
    ditekan = 1-ditekan;
    delay(1000);
  }
jalan = val;
if(ditekan == HIGH) {

    digitalWrite(10,HIGH);
    digitalWrite(11,HIGH);
    delayMicroseconds(500);
    digitalWrite(11,LOW);
    delayMicroseconds(500);
    } else {
    digitalWrite(10,LOW);
    digitalWrite(11,HIGH);
    delayMicroseconds(500);
    digitalWrite(11,LOW);
    delayMicroseconds(500);
    }
    //delay(1);
}

Best Answer

Related Solutions

Electronic – L297 stepper motor driver inhibit issue

Electronic – arduino – L297 + L298 circuit not working

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