the values of speed of encoder

Projects General Guidance
1

hi
i have written this code to measure the position and the speed of encoder but the values of speed is so large

#define outputA 6
#define outputB 7
unsigned long timeO = 0;
unsigned long timeF = 0;
volatile long pulses = 0;
float encoderspeed = 0;
int counter = 0;
int aState;
int aLastState;

void setup() {
  pinMode (outputA, INPUT);
  pinMode (outputB, INPUT);
  Serial.begin(9600);
  aLastState = digitalRead(outputA);
  attachInterrupt(digitalPinToInterrupt(outputA), detectPulses, RISING);
  timeO = micros();
}

void loop() {
  timeF = micros();
aState = digitalRead(outputA);
if (aState != aLastState) {
  if (digitalRead(outputB) != aState) {
    counter ++;
  } else {
    counter --;
  }
  encoderspeed = ((float)pulses/12.0)/((float)(timeF - timeO)/(60000000.0) );
  
  Serial.print("Position: ");
  Serial.println(counter);
  Serial.print("Speed:");
  Serial.println(encoderspeed);
}
aLastState = aState;
pulses = 0;
timeO = micros();
}
void detectPulses() {
  if (digitalRead(outputB) == LOW) {
    pulses++;
  }
  else {
    pulses--;
  }
}
2

koronus:
hi
i have written this code to measure the position and the speed of encoder but the values of speed is so large

#define outputA 6

#define outputB 7
unsigned long timeO = 0;
unsigned long timeF = 0;
volatile long pulses = 0;
float encoderspeed = 0;
int counter = 0;
int aState;
int aLastState;

void setup() {
  pinMode (outputA, INPUT);
  pinMode (outputB, INPUT);
  Serial.begin(9600);
  aLastState = digitalRead(outputA);
  attachInterrupt(digitalPinToInterrupt(outputA), detectPulses, RISING);
  timeO = micros();
}

void loop() {
  timeF = micros();
aState = digitalRead(outputA);
if (aState != aLastState) {
  if (digitalRead(outputB) != aState) {
    counter ++;
  } else {
    counter --;
  }
  encoderspeed = ((float)pulses/12.0)/((float)(timeF - timeO)/(60000000.0) );
 
  Serial.print("Position: ");
  Serial.println(counter);
  Serial.print("Speed:");
  Serial.println(encoderspeed);
}
aLastState = aState;
pulses = 0;
timeO = micros();
}
void detectPulses() {
  if (digitalRead(outputB) == LOW) {
    pulses++;
  }
  else {
    pulses--;
  }
}

the value of the speed is some numbers like 1250000.0 or 874500.0 etc. but I want to show the value of the speed of the encoder something like 250.0 in the maximum value. could you help me please what is wrong in my programming?

3

If it's just a matter of presentation, divide the result by a given number while printing. That number could be e.g the result of 1250000 / 250.

4

sterretje:
If it's just a matter of presentation, divide the result by a given number while printing. That number could be e.g the result of 1250000 / 250.

thanks for your answer, but I want to know why this result would be shown? the encoderspeed formula in my code is changing the pulses/microsecond to rev/min and the huge number shows that the pulses which read in one revolute are so many than the resolution of the encoder but why?