Stepper motor works - but not with AccelStepper

Using Arduino Motors, Mechanics, Power and CNC
#1

Hello,

I’ve got an Arduino Uno, a stepper motor driver (SilentStepStick with Trinamics TMC2100) and a small stepper motor. The motor works with a small test script, that sets the step pin manually to LOW and HIGH. But when I try to use the AccelStepper Library, it doesn’t work and I can’t figure out why.

Here’s the “manual” code, works really well:

#define EN_PIN    11 //enable (CFG6)
#define DIR_PIN   9 //direction
#define STEP_PIN  10 //step
#define CFG1_PIN  13

void setup()
{
  pinMode(EN_PIN, OUTPUT);
  digitalWrite(EN_PIN, HIGH); //deactivate driver (LOW active)
  pinMode(DIR_PIN, OUTPUT);
  digitalWrite(DIR_PIN, HIGH); //LOW or HIGH
  pinMode(STEP_PIN, OUTPUT);
  digitalWrite(STEP_PIN, LOW);
  pinMode(CFG1_PIN, OUTPUT);
  digitalWrite(CFG1_PIN, HIGH);
  
  digitalWrite(EN_PIN, LOW); //activate driver
}

void loop()
{
  //make steps
  digitalWrite(STEP_PIN, HIGH);
  delayMicroseconds(2000);
  digitalWrite(STEP_PIN, LOW);
  delayMicroseconds(2000);
}

Now here’s the AccelStepper script:

#include <AccelStepper.h>

#define DIR_PIN 9
#define STEP_PIN 10
#define EN_PIN 11
#define CFG1_PIN 13

AccelStepper stepper(1, STEP_PIN, DIR_PIN);

void setup() {
  pinMode(CFG1_PIN, OUTPUT);
  digitalWrite(CFG1_PIN, HIGH);
  stepper.setPinsInverted(false, false, true);
  stepper.setEnablePin(EN_PIN);
  stepper.setSpeed(200);

}

void loop() {
    stepper.runSpeed();

}

The stepper motor is powered, but it just doesn’t move at all. I tried varying speeds, inverted pins, etc. Nothing seems to work …

Maybe someone of you has a suggestion.

Thanks in advance,

  • Bas3008
#2

In the working program you have ENABLE pulled LOW - but not in the other version ?

More likely, in the AccelStepper program you have no moveTo() to tell it how many steps to take.

...R

#3

In the AccelStepper code, I set it to LOW via stepper.setEnablePin(EN_PIN) and setPinsInverted(...). The stepper motor blocks, so it's definitely enabled.

I added stepper.moveTo(32000) to the setup, but still nothing moves :confused:

#4

Call run() in loop and moveTo() at the end of setup.

#5

Also you haven't called setMaxSpeed() or setAcceleration() in setup(), do so.

#6

Hi Bas3008,

Have you managed to get it moving by the end of the day? Can please you give your final scratch? I’m experiensing the same problem.

#7

Janus2006:
Hi Bas3008,

Have you managed to get it moving by the end of the day? Can please you give your final scratch? I'm experiensing the same problem.

You have re-awakened a Thread that is nearly 2 years dead.

Post your program.
Provide details of your stepper motor and stepper motor drivers
Provide details of your motor power supply (volts and amps)
Provide a clear diagram showing how YOU have everything connected.

...R
Stepper Motor Basics
Simple Stepper Code

#8