Ramps 1.6 and 3 pin Fan for Cooling

Dear RepRap Forum members,

I am using RAMPS 1.6 with 4 TM2208 drivers. I want to cool these drivers with a 3 pin (red, black, white) fan. How should I connect the fan and run it?

Best regards.
bkarpuz

RAMPS uses 2 wire fans. They PWM the power to change the speed. Ie then only use +V (red) and GND (black) wires


Fans have to be connected via a mosfet to be software controlled.


A stock ramps has 3 mosfets, used for hotend, heated bed and part cooling fan.


So step 1 is add more mosfets eg by using a RAMPS RRD Fan Extender

Step 2 is to configure a Controller Fan. this fan turns on when heating mosfets are active or when stepper drivers are active.
Enable #define USE_CONTROLLER_FAN
Add the mosfet pin #define CONTROLLER_FAN_PIN {pin number}

Edited 6 time(s). Last edit at 06/05/2023 08:43AM by Dust.

Quote
Dust
A stock ramps has 3 mosfets, used for hotend, heated bed and part cooling fan.

Part cooling is the part being printed, right?

Quote
Dust
So step 1 is add more mosfets eg by using a RAMPS RRD Fan Extender

How can I connect this to RAMPS 1.6?

Thank you very much Dust.

"Part cooling is the part being printed, right?" yes

That mosfet extension plugs into the servo plugs

Quote
Dust
RAMPS uses 2 wire fans.
They PWM the power to change the speed. Ie then only use +V (red) and GND (black) wires.

Fans have to be connected via a mosfet to be software controlled.
A stock ramps has 3 mosfets, used for hotend, heated bed and part cooling fan.

If I will not be using hotend and heated bed, can I connect 2-pin fans to these outputs?

Yes