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Add servo motherboard and update Marlin / Double extrusion

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Hello everybody,

i would like to add a servo to my UM2 for double extruder but i don't know where can i plug it on my motherboard in order to manage it.

I tried to change the marlin sofware to use one extruder for two head and one servo to tilt from the first head to the second head (http://www.thingiverse.com/thing:673816/#files)

I changed this file like that :


#define MOTHERBOARD 72

// This defines the number of extruders


#define EXTRUDERS 2




#define TEMP_SENSOR_1 1 // 0

#define INVERT_E1_DIR true // false

#define NUM_SERVOS 1


else if(code_seen('T'))


tmp_extruder = code_value();

//Added for DEISS dual extruder

if(tmp_extruder == 0) {




delay (servopos_delay);



if(tmp_extruder == 1) {








if(tmp_extruder >= EXTRUDERS) {



#define E0_STEP_PIN 42

#define E0_DIR_PIN 43

#define E0_ENABLE_PIN 37

// the extruder 1 pins as the extruder 0.

#define E1_STEP_PIN 42

#define E1_DIR_PIN 43

#define E1_ENABLE_PIN 37

//i must define the "SERVO0" pin


#define SERVO0_PIN 11 // i used 11 but i don't know which pin i can use and where i can plug on my board



// end

PLease, could you help me?

Thank in advance!!!


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