Driving 6 servos on a Arduino Nano PD6 not working

Other Hardware Motors, Mechanics, Power and CNC
1

Hello,
I try to run 6 servos on an Arduino nano.
Every's working fine (port PD2 - PT5 and PT7) except running a servo on PD6.
Here is my code:

#include <Servo.h>
Servo Servo01, Servo02,Servo03, Servo04,Servo05, Servo06;
int ServoPin01=2 , ServoPin02=3 ,ServoPin03=4 ,ServoPin04=5 ,ServoPin05=5 ,ServoPin06=7;
void setup() 
{
  // put your setup code here, to run once:
  Serial.begin(9600);
  Servo01.attach(ServoPin01);
  Servo02.attach(ServoPin02);
  Servo03.attach(ServoPin03);
  Servo04.attach(ServoPin04);
  Servo05.attach(ServoPin05);
  Servo05.attach(ServoPin06);
  delay(6000);
}

void loop() 
{
  // put your main code here, to run repeatedly:
  Serial.println("Start cycle");
  Servo01.write(0);
  Servo02.write(0);
  Servo03.write(0);  
  Servo04.write(0);  
  Servo05.write(0);  
  Servo06.write(0);
  delay(2000);
  Servo01.write(180);
  Servo02.write(180);
  Servo03.write(180);  
  Servo04.write(180);  
  Servo05.write(180);  
  Servo06.write(180);
  delay(2000);
 }

I have no idea what's the problem.
Must there be a special setting to run on PD6 port?

2

How are the servos powered ?

3

Hi,
Can you see something repetitive here?

int ServoPin01=2 , ServoPin02=3 ,ServoPin03=4 ,ServoPin04=5 ,ServoPin05=5 ,ServoPin06=7;

You are using pins 2, 3, 4, 5, 5, 7.
..................................................| problem?

Tom... :smiley: :+1: :coffee: :australia:

1 Like
4

Hi UKHeliBob,
thanks for your answer.
They are powered on a powersuply with 2.4A.
Maybe that is not the problem.
It's funny because I can run the servo on each port except the PD6.
So I connect only one servo on each prot seperately.
When I connect to PD6 there is nothing happens. It's the same problem on an other ARDUINO Nano too.

5

Hi TomGeorge,
thanks for your hint.
I corrected the code but there is still this problem.

6

Posting schematics might help out.

7

Hi,
Write some code that just turns pin 6 ON and OFF each second.
See if you can see the voltage going up and down with a DMM, or a LED and resistor.

A picture(s) of your project would help to, let us see you component layout.

Tom... :smiley: :+1: :coffee: :australia:

8

Hi,
Repetitive again.

 Serial.begin(9600);
  Servo01.attach(ServoPin01);
  Servo02.attach(ServoPin02);
  Servo03.attach(ServoPin03);
  Servo04.attach(ServoPin04);
  Servo05.attach(ServoPin05);
  Servo05.attach(ServoPin06);

Two Servo05 to attach.

Tom.. :smiley: :+1: :coffee: :australia:

1 Like
9

Hi TomGeorge,
thanks a lot for your answer.
Yes thism was my fault.
I corrected it and now it works.
Thanks to all of you for your support.

10

It will be easier with an array. It is still possible to do something with a specific servo, as in the loop(), or with a for-loop, as in setup():

#include <Servo.h>

Servo servo[6];
int servoPins[6] = {2,3,4,5,6,7};

void setup() 
{
  // put your setup code here, to run once:
  Serial.begin(9600);

  for( int i=0; i<6; i++)
  {
    servo[i].attach(servoPins[i]);
  }

  delay(1000);
}

void loop() 
{
  // put your main code here, to run repeatedly:
  Serial.println("Start cycle");
  servo[0].write(0);
  servo[1].write(0);
  servo[2].write(0);  
  servo[3].write(0);  
  servo[4].write(0);  
  servo[5].write(0);
  delay(2000);
  servo[0].write(180);
  servo[1].write(180);
  servo[2].write(180);  
  servo[3].write(180);  
  servo[4].write(180);  
  servo[5].write(180);
  delay(2000);
}

The sketch in Wokwi simulator:

11

Hi Koepel,
thanks! you are right! But this works for a dirty sketch too.

12

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