Equivalent code using AccelStepper library

[Ronneil Camara]

What would be the AccelStepper code equivalent to move stepper 25 steps only then delay 1000ms?

In Arduino's Stepper library, I would simply do 

# -------------------------------------------------

#include <Stepper.h>

Stepper myStepper(200, 8,9,10,11);

void setup() {

    myStepper.setSpeed(60);

}

void loop() {

    myStepper.step(25);

    delay(1000);

}

# -------------------------------------------------

Any help would be greatly appreciated.

Thanks,

Neil

[Sandy Noble]

AccelStepper myStepper(AccelStepper::FULL4WIRE, 8,9,10,11);

void setup() {

    myStepper.setMaxSpeed(60.0);

}

void loop() {

    myStepper.runToNewPosition(myStepper.currentPosition()+25);

    delay(1000);

}

....  alternatively, the more "accelsteppery" kind of way

void loop() {

    myStepper.move(25);

    while (myStepper.distanceToGo() != 0) {

        myStepper.run();

    }

    delay(1000);

}

.... I suppose an even more accelsteppery kind of way might be

void loop() {

     if (myStepper.distanceToGo() == 0) {

         delay(1000);

         myStepper.move(25);

     }

     myStepper.run();

}

I tend to think that the .run() method should be in the main loop when practical.  Don't know why, maybe it's stupid.

.... I suppose this:

void loop() {

     if (myStepper.run()) {

         delay(1000);

         myStepper.move(25);

     }

}

would work too - I don't feel good about doing essential work in an if evaluation, but it might save a couple of cycles maybe!

sn

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Sandy Noble

[onur olce]

Sandy is an expert as you can see :)

[Ronneil Camara]

Does this look right?

void moveStepper(int steps, int delayMs) {
if (myStepper.distanceToGo() == 0) {

delay(delayMs);

myStepper.move(steps);

}
}
myStepper.run();

}

void loop() {
moveStepper(25, 1000);
}

Thanks Sandy!

[Sandy Noble]

Looks ok to me!

sn

[Ronneil Camara]

Great! I'll try it once I get home. :)

On Wednesday, November 13, 2013 11:57:20 AM UTC-6, Sandy Noble wrote:

Looks ok to me!

sn

[Ronneil Camara]

Hi Sandy,

Here is an update. The code is not moving the stepper motor.

This is the code I uploaded to my Arduino UNO.

#include <AccelStepper.h>

AccelStepper stepper(1,11,10);

void setup() {

        stepper.setMaxSpeed(100.0);

        stepper.setSpeed(60);

}

void loop() {

        moveStepper(200, 1000);

}

void moveStepper(int steps, int delayMs)

{

        if (stepper.distanceToGo() == 0) {

                delay(delayMs);

                stepper.move(steps);

        }

        stepper.run();

}

However, the code below is able to move my stepper motor properly.

#include <AccelStepper.h>

AccelStepper stepper(1,11,10);

void setup()

{  

   stepper.setMaxSpeed(500);

   stepper.setSpeed(60);

}

void loop()

{  

   stepper.runSpeed();

}

[Ronneil Camara]

Here is another update. I got it to work when I added stepper.setAcceleration(100);

However, is there a way to make it move at constant speed?

[Ronneil Camara]

It's me again. :)

I've been doing many experiments using different configuration. I noticed that when I use stepper.setAcceleration(), the stepper.setSpeed() doesn't get honored anymore. Am I right with my observation?

I also noticed that when I increase the value in stepper.setAcceleration(), the torque weakens. Am i correct?

Thanks,

Neil