Heater 2 pin to power additional fan

Hey all,

I'm trying to hook up the stepper driver cooling fans to the He2 output on the RUMBA. I'm completely new to this and I need help.

I'm using a RUMBA control board, and Marlin firmware. Single extruder connected to the extruder 0 pins.

In configuration_adv.h I found some code as follows:
#define CONTROLLERFAN_PIN -1 //Pin used for the fan to cool controller (-1 to disable)
#define CONTROLLERFAN_SECS 60 //How many seconds, after all motors were disabled, the fan should run
#define CONTROLLERFAN_SPEED 255 // == full speed

And in pins_RUMBA.h I found this:
#define HEATER_2_PIN 6 // EXTRUDER 3

I'm guessing if I change the value from -1 to 6 in #define controllerfan_pin, the fans should work. I'm just guessing though so I'm a little afraid to test it. Saved up for a while to buy the parts and don't want to fry the board before I begin playing with it

Any ideas?

Thanks, and regards!

You can try the pin without fan attached. If you see it's yellow LED coming on, you know you are right.

Thanks O_Lampe,

Tried that, then took the plunge and connected everything. Works like a charm and so far no burnt circuitry :p