Hi,
I need to add a fan to better cool the printed parts in order to improuve quality...
... I've look on internet aboutn Mega and Ramps and I have understood that I can connect this fan on D9 pin...
... unfortunatelly on this pin I always have full power and Repetier are not able to manage it!
Maybe I need to change somethink in firmware... maybe uncomment the #define FAN_SOFT_PWM?
Cooling Fan
Re: Cooling Fan
Maybe you should check the D9 pin is for the signal pin? Then you need to check the signal pin is correct or not on pins.h
-Keep your mind and try to test it. 
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-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!