Servo Help

Using Arduino Motors, Mechanics, Power and CNC
1

I hope this is in the right section, I apologize if it's not.

I'm having problems with a new more powerful servo I just purchased. I'm currently running the following sketch with the cheap SG90 servo provided by the Elegoo kit with no problem.

#include <Servo.h>

Servo servo;

void setup()
{

servo.attach(8); // HERE WE TELL ARDUINO WHICH PIN # THE SERVO IS ATTACHED TO

}

void loop() {

delay(0); // DELAY JUST MEANS WAIT. HOW LONG DO YOUWANT TO WAIT BEFORE THE NEXT ACTION
//
servo.write(0);

delay(1000);

servo.write(180);

delay(1000);

}

When I switch the servo to: RCD 35065S HS-5065MG High Torque Metal Gear Feather Servo
running the same sketch and have no movement.

When I run the provided sweep sketch the new servo works perfectly. Any idea why this isn't working?

THank you in advance

2

Most servo problems come from inadequate power.
How are you powering the servo?

Note that attempting to power the servo from the arduino 5v pin is a bad idea.
It might work most of the time for a very small servo with no load on it.
But as soon as you attempt to use a larger servo, or put a load on the servo as it moves, you run into problems.

3

hi Vince,

I have an external power supply for the servo. When I run the sweep program it works fine, but the other.. no movement

4

The only real difference between your code and sweep is that your code wants to go from 0 to 180 in one step, and sweep does it one degree at a time.

I wonder if it could still be a current issue then, that it somehow just manages to squeeze out 1 degree at a time but not the big movement? (That may be bullshit but as I say, that's the significant difference between the two sketches.)

I have an external power supply for the servo

How much current can it supply? Says here that servo is 1.2A at stall. Are your connections good for that?- if you use breadboard, maybe not....

5

A few things. When you post code, post it using code tags. So it looks like this:

#include <Servo.h>
Servo servo;

void setup()
{
  servo.attach(8);  // HERE WE TELL ARDUINO WHICH PIN # THE SERVO IS ATTACHED TO
}

void loop() {
  delay(0); // DELAY JUST MEANS WAIT. HOW LONG DO YOUWANT TO WAIT BEFORE THE NEXT ACTION
  //
  servo.write(0);
  delay(1000);
  servo.write(180);
  delay(1000);
}

Also, use autoformat CTRL-T
Also, remove white space.
These all make it easier to read the code, so easier for us to help you.

Now, like elvon_blunden I am still suspicious of your servo power.
Can you get a pen and paper, hand draw a wiring diagram of your arduino, the power supply and servo?
Then take a picture of the wiring diagram and post that picture here.

6