ESC works in reverse with Potentiometer but not with manual Code

[vela0050]

Hi everyone...So I got this reversable ESC. Using it to run a Brushless motor. Would like to use the motor in a washing machine like contraption that spins back and forth and cleans parts in water. Thus the motor should move forward and backward.

Here is the issue: When I use a potentiometer the mid-value of 90 makes the motor standstill, while values above make it move forward and number below backward. With the following code, everything works as expected, but as soon as I type in values the motor does not reverse. Actually, it does not change direction unless I use a potentiometer.

I don't see a reason why a value from (0-180) from the Potentiometer reverses the motor's direction just fine, but when I type in the values it does not change direction.

Code that works fine with Potentiometer and reverses the direction:

> #include <Servo.h> 
> Servo ESC;   
> 
> int value; 
> void setup()
> {
>   Serial.begin(9600);
>   ESC.attach(3);
> }
> 
> void loop() { 
>   value=analogRead(A0);
>   value=map(value, 0, 1023, 0, 180); 
>   ESC.write(value);                   . 
>   Serial.println(value);
>   }
> 
>

But this manually input code does not reverse the motor:

> #include <Servo.h>
> Servo ESC;
> int i;
> void setup(){
> Serial.begin(9600);
> ESC.attach(3);
> }
> 
> void loop() {
>   
>   for (i=90;i<=100;i++){
>        ESC.write(i);
>          Serial.println(i);
>        delay(1000);
>   }
>   for (i=100;i>=90;i--){
>        ESC.write(i);
>          Serial.println(i);
>        delay(1000);
>   }
>    for (i=90;i>=80;i--){
>        ESC.write(i);
>          Serial.println(i);
>        delay(1000);
>    }
>      for (i=80;i<=90;i++){
>        ESC.write(i);
>          Serial.println(i);
>        delay(1000);
> }
> 
> }

Does anybody have a clue?Preformatted text

[Railroader]

One difference is the delay(1000)... One second. Why? There's no delay in the working pot version.

[vela0050]

That the speed at wich it counts up or down...

[Railroader]

In the pot version You loop on and on sending the mapped pot value.
I guess that in the typed, manual version You need to perform that ESC.write over and over during that second.
Make a functioin that loops for a second ESC.writing the value sent to the function. Call that function instead of doing ESC.write.

[slipstick]

What does it do if instead of those very slow for loops you do simple write(100), write(90), write(80) with delays as needed?

Steve

[vela0050]

The motor just spins at a constant speed.

[vela0050]

WOW! Thank you this tottally worked. The ESC does need a constant stream of values being sent to work. I will have to figure out how to clean up this code, but this is great start. Here is code is used to quickly test the theory:

> 
> #include <Servo.h>
> Servo ESC;
> 
> void setup(){
> delay(2000);
> Serial.begin(9600);
> ESC.attach(3);
> delay(3000);
> 
> }
> 
> void loop() {
>   
>  
> 
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(90);
>      Serial.println(90);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(89);
>      Serial.println(89);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(88);
>      Serial.println(88);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(87);
>      Serial.println(87);
>      delay(1);
>        }
>        for (int i=0;i<=3000;i++){ 
>      ESC.write(86);
>      Serial.println(86);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(85);
>      Serial.println(85);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(84);
>      Serial.println(84);
>      delay(1);
>        }
>        
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(90);
>      Serial.println(90);
>      delay(1);
>        }
>        
>       for (int i=0;i<=2000;i++){ 
>      ESC.write(96);
>      Serial.println(96);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(95);
>      Serial.println(95);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(94);
>      Serial.println(94);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(93);
>      Serial.println(93);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(92);
>      Serial.println(92);
>      delay(1);
>        }
>        for (int i=0;i<=2000;i++){ 
>      ESC.write(91);
>      Serial.println(91);
>      delay(1);
>        }
> }

[Railroader]

Great! Read my previous reply again. You can do the same using much less of code. Call this function from Your test for loops instead of the ESCwrite.

function kickESP(int val){ //val is the value sent to the ESP
unsigned long time = millis();// register the starting time of the one second timing.
while( millis() < time + 1000){
ESP.write(val);
delay(1);
}
}