Managed to get it wright at last, thanks for your suport carl_m1968

Here are my conetions:

Changes made on Marlin

Configuration.h
              #define TEMP_SENSOR_0 -1
              #define TEMP_SENSOR_1 -1

Pins_RUMBA.h

           // Temperature Sensors
            //
            #if TEMP_SENSOR_0 == -1
                  #define TEMP_0_PIN    10  // Analog Input (connector *K1* on RUMBA thermocouple ADD ON is used)
           #else
                  #define TEMP_0_PIN       15   // Analog Input (default connector for thermistor *T0* on rumba board is used)
           #endif

           #if TEMP_SENSOR_1 == -1
                 #define TEMP_1_PIN        9   // Analog Input (connector *K2* on RUMBA thermocouple ADD ON is used)

Changed the conection
Signal  to A10 and A9 pins on Exp 3
Pin number in Pins_Rumba_h to 9 and 10

Got diferent reading, don't have a thermometer in hand to calibrate, but when i turn heater on it takes to long to heat until i get system halted error.

I guess now it's a calibration problem. later i will get a thermometer and try to calibrate them

before:

now:

What i understood, and what i will try is

Change the conections signal to A10 and a9, as your advise. And change the pin numbers on marlin to 10 and 9.

Does it feels right to you?

The image was for orientation purposes only, it's a ramps. I could nd find any rumba image with usage of exp3.

this is my board

Maneged to find this quote
"I've been using the pins.h Marlin file along with the RUMBA board schematics and the ATMegs2560 pinout diagram to figure out what is what. I am adding thermocouples to my printer and can't use the thermistor ports because of the voltage dividers (RRD--please add a jumper for direct connection to thermistor ADCs on future versions!). I am using the ADC pins on EXP3 and it took a little while to figure out the pin #s to use (it turns out that it was 9 and 10 and, looking back, it's obvious, as they're labeled A9 and A10 on the schematic, but it wasn't clear at the beginning and other pin #s aren't so obvious). If I want to code for PJ7 (on the schematics), how do I know what pin that is in Marlin?"

From
jwesolow, Mar 5, 2015 - another forum

Tomorow i'll try it and report back.

And thank you so much for your help and time.

Your board has EXP3 right below the processor. Or am I missing what you are trying to say?

this is my board

Maneged to find this quote
"I've been using the pins.h Marlin file along with the RUMBA board schematics and the ATMegs2560 pinout diagram to figure out what is what. I am adding thermocouples to my printer and can't use the thermistor ports because of the voltage dividers (RRD--please add a jumper for direct connection to thermistor ADCs on future versions!). I am using the ADC pins on EXP3 and it took a little while to figure out the pin #s to use (it turns out that it was 9 and 10 and, looking back, it's obvious, as they're labeled A9 and A10 on the schematic, but it wasn't clear at the beginning and other pin #s aren't so obvious). If I want to code for PJ7 (on the schematics), how do I know what pin that is in Marlin?"

From
jwesolow, Mar 5, 2015 - another forum

Tomorow i'll try it and report back.

And thank you so much for your help and time.

I'm using a rumba
I'll try on A9 and A10, as you refered. Can you tell me the pin number to setup on Marlin?

You would need to look up a pin diagram of your exact processor and then see what the physical pin number is for AIN9 and AIN10 which stands for Analog In 9 and Analog In 10. The exact pin number like pin 5 or pin number 10 is what pins.h is looking for.

On the RUMBA the analog pins are on EXP3 but are A9 and A10. Did you miswire or misdraw?

On a RAMPS the analog pins are on AUX2 A8, A9, A10, and A11. Also on the one you show. Any pins marked A# are analog pins.

But you RUMBA image is not correct.

Once you get the wiring correct you then have to set the Temp sensor for the correct device, then go into pins.H and make sure Temp 0 and Temp 1 are set to the correct analog pins you have used on your correct board type.

And this:

http://reprap.org/wiki/ExtThermoCouple_1.0

And this info i got from the supplier of the expansion boards
"Are these analog pins without pull-up? Normal thermistor pins have a 4K7 pull up resistor. You need either remove the resistor or use another analog pin. "

The PWM port you are connecting to is an output for driving something at a variable level controlled by software like a fan.

After several searches made the conections as follow:

In marlin set:
#define TEMP_SENSOR_0 -1
#define TEMP_SENSOR_1 -1

Pins used
+5v pin 2
Ground pin 4
Signal 1 pin 6
Signal 2 pin 5

First time i tried i got 300º for extruder 1 and 2

Changed in config_adv
#define TEMP_SENSOR_AD595_GAIN 0.1

tried and it reads 30º for both, but if i turn on any heater i don't get any changes on temperature.

Can someone help me on that.
I tried searching, but i can't find much information on this theme