I need to spin my DC motor for it to work.

Thread Starter

filipmr

Joined Jan 2, 2021
64
Something weird is going on with my DC motor . When i turn on my arduno, i hear it (the DC motor) working, but it doesn't spin, and then i need to spin it a few times (with my fingers), and then it starts working. What is going on
 

MaxHeadRoom

Joined Jul 18, 2013
23,103
One of two things, there is a very low DC voltage present, not enough to rotate the armature?
The other there is a low AC or ripple content causing the buzz, a DC motor generally is silent or very quiet.
What is the motor,PS, and drive method details?
What do you mean "by hear it working?"
Max.
 

Thread Starter

filipmr

Joined Jan 2, 2021
64
One of two things, there is a very low DC voltage present, not enough to rotate the armature?
The other there is a low AC or ripple content causing the buzz, a DC motor generally is silent or very quiet.
What is the motor,PS, and drive method details?
What do you mean "by hear it working?"
Max.
I am using a motor similar to this one https://www.indiamart.com/proddetail/dc-motor-small-size-3-to-9v-3000rpm-12388061791.html and I connected it to the arduino like this https://www.instructables.com/DC-Motor-Control-Arduino-Uno-R3/
By hearing it work i mean that i can hear some silent buzzing.....

Thanks.
 

MaxHeadRoom

Joined Jul 18, 2013
23,103
So you are using a simple H bridge iC, it sounds like there may be some small residual current if the motor buzzes slightly before a actual command is given from the Arduino?
Normally any PWM command is terminated when the motor is supposed to be off.
Max.
 
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