AnalogWrite() Uno and Nano value of 240 // Sketch

[kavin1995]

hello everyone ...

I would like to control a motor. I noticed when I use the arduino uno that the rotation speed with analogwrite (240) turns faster than when I use the arduino nano 33 ble with the same code.

Why does the motor of the arduino nano 33 ble turn more slowly with the same pin assignment.

#define drehrichtungMotorLinks 6
#define drehrichtungMotorRechts 7
#define drehgeschwindigkeitMotorLinks 9
#define drehgeschwindigkeitMotorRechts 10

void setup(){
  
  Serial.begin(9600); 
  //TCCR2B = TCCR2B & 0b11111000 | 0x01;         // Timer 2 zu 31300HZ. Timer 2 kontrolliert  die Pins 9 und 10
  pinMode(drehrichtungMotorLinks, OUTPUT);     // Drehrichtung des linken Motors vorgegeben
  pinMode(drehrichtungMotorRechts, OUTPUT);    // Drehrichtung des rechten Motors vorgegeben
 
}

  void loop(){

         digitalWrite(drehrichtungMotorLinks, HIGH); 
         digitalWrite(drehrichtungMotorRechts, HIGH);  
       
        analogWrite(drehgeschwindigkeitMotorLinks, 240);
        analogWrite(drehgeschwindigkeitMotorRechts, 240);
        
    }
  

[UKHeliBob]

Could it be due the fact that the Nano 33 is a 3.3V device, as its name implies, whereas the Uno is a 5V device ?

How is the motor powered and connected to the Arduinos ?

[kavin1995]

oh yes, the operating voltage is lower for arduino nano than for a uno. how can I fix the problem that still rotates faster?

The Arduino nano is directly connected to a motor driver. this motor driver is then directly connected to the brushless DC motor.

[horemansp]

Do you use something like this? This can be powered separately.

[kavin1995]

this is what I used: motor driver of: tmcm 1630 and a voltage converter: velleman k1823 to reduce the voltage of the battery from 36v to 9v input voltage.

@horemansp // @UKHeliBob

[UKHeliBob]

Where does the power for the motors come from ?

[kavin1995]

the motors are powered by a lithium ion battery with 36 volts. the arudino nano is then connected to an input voltage of 12 volts via a voltage converter.

@horemansp // @UKHeliBob

[UKHeliBob]

Your description is becoming quote complicated to follow

Please post a schematic of your project. A photo of a hand drawn

[kavin1995]

@horemansp // @UKHeliBob

better to understand?

[UKHeliBob]

Thanks, but we could do with more detail. For instance, is there a common GND between all of teh devices ?

[kavin1995]

all devices are connected to the same gnd. with the arduino uno it works without any problems with the code only with the nano it runs very, very slowly.

@UKHeliBob

[Boffin]

Which input of your TMCM-1630 do you use?

[TomGeorge]

Hi,
I'm sorry but for a project of this level, you must have a schematic.

PLEASE, include ALL power connections and label ALL connections to Nano, motor drivers and DC-DC converter.

This will help us to give some more informed answers.

Thanks.. Tom...

[lastchancename]

Yes, that diagram is called a BLOCK DIAGRAM, and is useful to describe the concept of the project, but a SCHEMATIC, or CIRCUIT diagram shows all the internal detail needed to probe, verify or even to assemble the project.

[cattledog]

@Boffin

Which input of your TMCM-1630 do you use?

You must answer this question.

What I see in the documentation for pin2 would indicate that there will be a difference between the 5v and 3.3v pwm.

2 Velocity analogue Used for velocity control in stand alone operation by
supplying external 0 – 10V signal

[kavin1995]

Problem was solved. The problem is that the operating voltage of nano is designed for 3.3 V. and not 5 V. Therefore the input voltage of the motor driver had to be increased. Thanks anyway for the help and for the tip on how to post a post next time.