Continous work of stepper motors

Other Hardware Motors, Mechanics, Power and CNC
1

Hello guys,

I am new here so patience and indulgence are welcome :slight_smile:

I did my first basic projects but now I decided to do something more complicated. In my project I use stepper motors (28BYJ-48). I read the libraries functions but I still dont know how to make them run continously. In my project I need to move some flap until homing button is pressed.

Here is part of some sketch I found. It makes my motors move but just for some period (600 steps I assume):

...

stepper1.move(600);
stepper1.setSpeed(stepperSpeed);

stepper2.move(600);
stepper2.setSpeed(stepperSpeed);

stepper1.runSpeedToPosition();
stepper2.runSpeedToPosition();

...

Some example os short sketch would be werry helpfull :slight_smile:

Something that in words sounds like:

while A0=high rotate the engine :slight_smile:

2

Hi,

your information is too incomplete to help you:

  • e.g. what library do you want to use?
  • what about your driver and the wiring with your stepper?

To get into the stuff about stepper motors, start with:
Robin's Stepper Motor Basics

3

Ok, more data...

I started to learn from this source:

My sketch comes from this page. My library is: #include <AccelStepper.h>

Is it really so difficult to make them move until some condition occurs?

Please some help :confused:

4

I don't know too much about the ULN2003 and the "direct" method to drive a stepper.
As I am working with stronger motors I am used to drivers (starting with a drv8825 and up to Gekko drivers) which drive the motor just by getting "step/pulse" and "direction" from the Arduino. But your configuration should work nevertheless with your configuration.

The sketch #1 in the tutorial tells the stepper to go to a position "20000", counting down the distanceToGo and it that == 0, it should reverse and go to "-20000".

Ref to AccelStepper library: the library is limited to about 4000 steps/sec - which means in your case, that your motor (due to the gear) can only turn about 60 RPM - is that ok for you?

Pls check the wiring again and post it so that we can exclude any wiring issues.

5

AccelStepper library, setSpeed(), runSpeed()

6

Konradus:
Is it really so difficult to make them move until some condition occurs?

Just write some code to make it move one step and repeat that as often as you want.

...R

7

pls post your complete sketch - it is impossible to guess what you are really doing; if the code lines of your first post is the only instruction in your main loop - then your motor is just moving 600 steps and then it will stop - provided that there is no more instruction.

So - pls post your full sketch and tell us what you want to accomplish.