How to move the speedometer needle through analogWrite?

Using Arduino Sensors
1

I want to move the needle of the speedometer using arduino. I have connected the wire from the speedometer to one of the PWM pin. The arduino code is:

int pin = 9; //PWM pin
int speed = 100; // value to be written to the speedometer
void setup() {
  // declare pin 9 to be an output:
  pinMode(pin, OUTPUT);
}
void loop() {
  // set the pin to the speed
  analogWrite(pin, speed);
}

The problem is that when i set the speed value to anything below 140, the needle does not move at all whereas if i set the speed value to greater or equal to 140 the needle rotates fully to the maximum value on the speedometer. I want the needle to rotate to 100 if i set the pin to value 100. How can this be achieved? Any ideas.

2

We need a description of your speedometer, is it a simple DC Voltmeter? If so what is the full scale voltage?
Can you post a link or brand name / part number?

3

The speedometer brand name is suzuki alto.

4

Actually earlier we were driving the speedometer through PLC. But now we want to do the same thing through Arduino.
In PLC, the following statement was driving the speedometer:

PLSY D110 K0 Y2

5

Post a link to the speedometer product page or data sheet.

6

The details of the speedometer are as:
Part Name: Speedometer Assy (Blue and Double trip)
Part Number: 34100M79F60

I could not find a link or the datasheet on the internet.

7

I doubt you can find that info on the net.

Your speedometer might be a stepper motor.
Leo..