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Manual Enable Heater 2 and Hot Bed


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Posted · Manual Enable Heater 2 and Hot Bed


How would I enable the other heater transistors on the Ultimaker shield ?

Would I just Edit the Pins.h file to make sure that the right pins are defined ?

#define HEATER_BED_PIN 3

#define HEATER_1_PIN 4

(I know these pins are different then default)




* Ultimaker pin assignment


#ifndef __AVR_ATmega1280__

#ifndef __AVR_ATmega2560__

#error Oops! Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.




#define HEATER_BED_PIN 3

#define TEMP_BED_PIN 10

#define HEATER_0_PIN 2

#define TEMP_0_PIN 8

#define HEATER_1_PIN 4

#define TEMP_1_PIN 9


Is there anything else that needs to be modified to enable the Heating transistors ?

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    Posted · Manual Enable Heater 2 and Hot Bed

    Ok I uploaded some basic code to the Arduino 2560, AND the 2 pins that I thought were dead are not.

    So I am missing something to enable the Heated bed, and the Heater 2 transistors. Anyone have an idea where I would go to enable these in the Marlin firmware.

    const int lowestPin = 3;

    const int highestPin = 4;

    void setup() {

    // set pins 2 through 13 as outputs:

    for (int thisPin =lowestPin; thisPin <= highestPin; thisPin++) {

    pinMode(thisPin, OUTPUT);



    void loop() {

    // iterate over the pins:

    for (int thisPin =lowestPin; thisPin <= highestPin; thisPin++) {

    // fade the LED on thisPin from off to brightest:

    for (int brightness = 0; brightness < 255; brightness++) {

    analogWrite(thisPin, brightness);



    // fade the LED on thisPin from brithstest to off:

    for (int brightness = 255; brightness >= 0; brightness--) {

    analogWrite(thisPin, brightness);



    // pause between LEDs:




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    Posted · Manual Enable Heater 2 and Hot Bed



    This page has no options to enable the heater or the heated bed. It only allows you specify the sensor, not the heater its self. I thought I had dead pins on my Arduino so I ordered a new one. But it turns out that its a software issue.

    In the Configuration.h of the marlin firmware I have it already set

    #define TEMP_SENSOR_0 -1

    #define TEMP_SENSOR_1 6

    #define TEMP_SENSOR_2 0

    #define TEMP_SENSOR_BED 6

    But the hot_bed and heater 1 still do not work. only heater0 works. (the hot end heater)

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    Posted · Manual Enable Heater 2 and Hot Bed

    Help! Anyone having issues using the Heated bed MOSFET on the Ultimaker Shield ?

    Here is my setup for Marlin:

    http://daid.eu/~daid/marlin_build ... stepsE=800

    I can see that the thermistor is working in the PrintRun. I can connect to the machine and and use a heat gun on the themistor to get a proper temperature reading.

    Next step is setting the Bed Temp to 60

    Here is some of the read out with the Monitor Print box checked.

    ok T:35.7 /0.0 B:3.0 /3.0 @:0

    ok T:35.8 /0.0 B:3.0 /3.0 @:0

    ok T:35.2 /0.0 B:66.6 /3.0 @:0 (Applying Heat gun)

    ok T:35.2 /0.0 B:78.8 /3.0 @:0

    ok T:35.1 /0.0 B:95.2 /3.0 @:0

    ok T:35.2 /0.0 B:73.0 /3.0 @:0

    ok T:35.2 /0.0 B:58.1 /3.0 @:0

    Setting bed temperature to 60.0 degrees Celsius.

    ok T:35.5 /0.0 B:46.0 /60.0 @:0 (I Expect the red LED on the MOSFET to turn on here But it does not)

    ok T:35.6 /0.0 B:27.2 /60.0 @:0

    ok T:35.7 /0.0 B:3.0 /60.0 @:0

    ok T:35.6 /0.0 B:3.0 /60.0 @:0

    I do know that, the pin on the Arduino is good as a I wrote a basic Pin High/Low program and watched the LED turn on and off.

    Any help thoughts or suggestions would be greatly appreciated.

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    Posted · Manual Enable Heater 2 and Hot Bed

    In stead of messing with the code of Marlin, I started to swap out resistors 4.7k ohm was what I have been using this whole time. I tried 10k with no better results.

    With each resistor I recompiled the look up table with the Python script from Rep Rap

    22k ohm works ! It starts off around ~ -20 only 2 less then the last value in the table {1008, -22}

    47k ohm works as well but it starts around -44

    Testing the 22k ohm resistor, Using my fingers to heat up the resistor It only returns a result of ~9c which means I should be dead.

    But I don't care, its working with out messing with any Marlin Code and no need to pre-heat the resistor.

    I'll be testing the results of the 22k ohm resistor at 60c, 70c, 80c, 90c, 100c with my toaster oven.

    ( I have one of reflow solder hacks that controls the oven's temp with an external micro controller)

    Thanks for everyone listening and reading to my troubles,


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