Need help with MG99R pan tilt

[stuberry55]

Hey all

A bit of a newbie here and feeling my way around things and appreciate any assistance in advance.

I'm trying to make a pan tilt device. I started with 2x micro 9G servos and everything works. The servo's were powered by a small phone charger.

Code I used:

#include <Servo.h>
Servo servo1;
Servo servo2;
int xaxis = A0;
int yaxis = A1;
int xpos = 90;
int ypos = 90;

int val;

void setup()
{
servo1.attach(4);
servo2.attach(5);
Serial.begin(9600);
}

void loop()
{
val = analogRead(xaxis);
val = map(val, 0, 1023, -1, 2);
xpos = xpos + val;
if (xpos > 180) xpos = 180;
if (xpos < 0) xpos = 0;
servo1.write(xpos);

val = analogRead(yaxis);
val = map(val, 0, 1023, -1, 2);
ypos = ypos + val;
if (ypos > 180) ypos = 180;
if (ypos < 0) ypos = 0;
servo2.write(ypos);

Serial.println("X-position is");
Serial.println(xpos);
Serial.println("Y-position is");
Serial.println(ypos);
delay(0);
}

But the servos were under powered so I replaced it with 2xMG996R servos. using the same mobile phone charger, one servo behaved erratically and the other did not respond.

I upped the power source for the servos using a 5V5A ACDC adapter and neither would work

Does the code need to be looked at or is it the power supply? I'm really confused.

Thanks again!

[Railroader]

Please post schematics and a link to the motors. Explain what the mapping of 0 to 1023 into -1 to 2 is intended to do. map returns an integer as far as I know...

[UKHeliBob]

@stuberry55

Code I used:

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[stuberry55]

Hi Railroader,

Here's a sketch of the circuit:

The mapping of 0 to 1023 was meant to slow the speed of the motor to allow for greater position control.

Thanks

[slipstick]

5V 5A should be adequate for 2 x MG996s provided it is a good regulated power supply and the supply negative is connected to the servos AND the Arduino GND which your sketch does not show.

Steve

[Railroader]

Thanks! Almost okey...
Read the reply from Slipstic!

[stuberry55]

Thanks! i'll give that a go and report back

[Idahowalker]

Supplying power to motors through a breadboard, expect issues.

[Railroader]

The bread board will get damaged and future projects will face "impossible", unexpected problems.....