Servo speed control is not precise.

Other Hardware Motors, Mechanics, Power and CNC
3

Here is another code I've written just to check the speed control:

#include <Servo.h>
Servo servo1;
float servoSpeed;


#define CALIBRATION_BUTTON_PIN 4


boolean calibrationButtonWasUp = true;
boolean calibrationLedEnabled = false;

float p3 = 0; // manipulator
int inputPin3 = A3;
boolean CCW = false;

void setup() {
  // put your setup code here, to run once:
pinMode(CALIBRATION_BUTTON_PIN, INPUT_PULLUP);
servo1.attach(9);

Serial.begin(9600);
}




void loop() {


  boolean calibrationButtonIsUp = digitalRead(CALIBRATION_BUTTON_PIN);
  if (calibrationButtonWasUp && !calibrationButtonIsUp) {
    delay(1000);
   calibrationButtonIsUp = digitalRead(CALIBRATION_BUTTON_PIN);
      if (!calibrationButtonIsUp) {
        
        if (CCW== false) {
        CCW = true;}
        else {
         CCW = false; 
        }
        
        
      }
      
  }

  
p3 = analogRead(inputPin3);
servoSpeed = float(1500*(p3/1023));

Serial.println(servoSpeed);
if (CCW == false) {

servo1.writeMicroseconds(1500+servoSpeed);}
else {
  
servo1.writeMicroseconds(1500-servoSpeed);

}

  
}

Same problem. CW - works just ok - very smooth. CCW - starts moving just when 'servoSpeed' is 181us. Then speed changes stepwise in 4 steps. Seems I need another precise servo.