PWM Fans cutting of...
 
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PWM Fans cutting off only with Curving enabled

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(@whorne89)
New Member
Joined: 2 years ago
Posts: 2
Topic starter  

Hello,

I have an issue with a newly configured Arduino Uno R3 and some PWM fans. 

I have everything working, seems to be good. I noticed at max speed, the fans were cutting off or at least reducing speed quickly for 1 second or 2 and then ramping back up. So I figured out the max speed they would not cut off and programmed the max speed accordingly. I even went conservative and set the max speed at 96% of the output just to be safe.

Speed works perfectly, and I cannot find an instance where they cut off. Except when I enable the curving effect. Then when I'm cornering at speed, one fan will spin up fast and cut off and usually stay cut off until I get to a straight again when both can start spinning again. If I keep curving off, no issues arise and it works fine.

Any idea why this may be happening and how the curving function works? 

Let me know, thank you! 


   
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 fgnq
(@fgnq)
Active Member
Joined: 3 years ago
Posts: 11
 

Tiene pinta a que los amperios que gastan los ventiladores a maxima velocidad, exceden la potencia de salida del arduino y por eso uno de ellos te corta. Segun las especificaciones de los motroshield, aguantan solo 3 amp ,salvo que pongas el de barcos.

 

Saludos.


   
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(@whorne89)
New Member
Joined: 2 years ago
Posts: 2
Topic starter  

@fgnq So my confusion here is that it DOESNT happen when the Curving is disabled. Only when enabled. And I am not using a motorshield, it's connected directly to the Arduino.


   
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(@bojo1991jon)
Active Member
Joined: 2 years ago
Posts: 6
 

Thanks for that!


   
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