Servo keep spinning

Projects Programming
1

Im making a segregation for my trash bin with 3 bin spinning at the bottom however the servo in the sensor that supposed to be stopping the trash keep on spinning this is my code.

#include <AccelStepper.h>
#include <MultiStepper.h>

#include<Servo.h>
#include <AccelStepper.h>
Servo flap;
#define trigPin 7
#define echoPin 6
int rain_pin = 3;
int inductive_pin = 4;
int flap_pin = 5;
int homing_pin=13;
int homing;
int rain;
int inductive;
int sound = 250;
int i;
#define FULLSTEP 4
AccelStepper myStepper(FULLSTEP,8,10,9,11);
void setup() 
{
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(rain_pin,INPUT);
  pinMode(inductive_pin,INPUT);
  pinMode(homing_pin,INPUT);
  flap.attach(flap_pin);
  homing=digitalRead(homing_pin);
  myStepper.setMaxSpeed(1000.0);
  myStepper.setAcceleration(100.0);
  myStepper.setSpeed(1000);
   for(i=0;homing==LOW;i++){
  myStepper.moveTo(i);
  myStepper.runToPosition();
    homing=digitalRead(homing_pin);
    }
  myStepper.moveTo(i-2);
 myStepper.runToPosition();
  myStepper.setCurrentPosition(0);
 
}

void loop() {
  long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
Serial.println(distance);
inductive=digitalRead(inductive_pin);
rain=digitalRead(rain_pin);

if(inductive==HIGH)//metallic waste
{ 
  myStepper.moveTo(982);
  myStepper.runToPosition();
 delay(2000);
  flap.writeMicroseconds(179);
  delay(1500);
  flap.writeMicroseconds(0);
  delay(500);
  myStepper.moveTo(0);
  myStepper.runToPosition();
}
if(rain==LOW)//wet waste
{
  myStepper.moveTo(1485);
  myStepper.runToPosition();
 delay(2000);
  flap.writeMicroseconds(179);
  delay(1500);
  flap.writeMicroseconds(0);
  delay(500);
  myStepper.moveTo(0);
  myStepper.runToPosition();
}
if(distance <=8)//dry waste
{
     
//delay(500);
if(rain==HIGH);
{
if(inductive==LOW);

{     
  myStepper.moveTo(510);
  myStepper.runToPosition();
 delay(2000);
  flap.writeMicroseconds(179);
  delay(1500);
  flap.writeMicroseconds(0);
  delay(500);
  myStepper.moveTo(0);
  myStepper.runToPosition();
}}}
if(distance>=9&&inductive==LOW&&rain==HIGH) //No waste
{
 myStepper.moveTo(0);
 myStepper.runToPosition();
  flap.writeMicroseconds(0);
}
delay(4000);
}
2

When a servo spins, that means it has been modified to act as a "Continuous Rotation Servo", basically a gearmotor with speed control. It no longer has position control.

You need to find a servo that has not been modified. That one will still have position control.

1 Like
3

may servo is Tower pro SG92R micro servco and is supposed to only spin 0-180 degree.

4

Sounds like your servo has been modified or is broken.

1 Like
5

how should I fix that is my code fine??

6

Get a new servo.

Hard to tell with broken hardware. Does it do what you want except the servo is spinning?

7

ty for answering the stepper does spin and the sensors does detect object but the problem is the micro serve that i used.

334247813_223920476747486_5245113818534133686_n
334247813_223920476747486_5245113818534133686_n1280×500 51.7 KB

this is my diagram i remove the buzzer because i dont need it

8 
flap.writeMicroseconds();  // μs

I think you meant to use ...

flap.write();  // degrees
9

i already done that but it didn't work

10

Sure, but when you get your new (unmodified, 0-180 deg) servo:

  • using servoflap.write(); will work with the values shown in your code (degrees)
  • If you want to use flap.writeMicroseconds(); then you'll need to use values in the range 1000-2000, where 1000 μs = 0 deg , 1500 μs = 90 deg and 2000 μs = 180 deg.
11

thanks this helps alot
i will test this

12

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