a5:faulty-temperature-readings

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a5:faulty-temperature-readings [2018/06/28 21:08]
samuelpinches
a5:faulty-temperature-readings [2019/02/18 20:53] (current)
samuelpinches [Fixing the problem]
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 ====Diagnosing the problem==== ====Diagnosing the problem====
-**1. Testing the thermistor function+**1. Testing the thermistor function
 ** **
 First, unplug the thermistor from the motherboard, and [[https://www.youtube.com/watch?v=ehf2HGCckY4|measure the resistance of the thermistor]]. It should measure around 100K ohms at room temperature.  First, unplug the thermistor from the motherboard, and [[https://www.youtube.com/watch?v=ehf2HGCckY4|measure the resistance of the thermistor]]. It should measure around 100K ohms at room temperature. 
  
-**2. Testing the connection+**2. Testing the connection
 ** **
 Check that you get the same reading at the thermistor itself, and also at the end of the cable that plugs right into the motherboard. Check that you get the same reading at the thermistor itself, and also at the end of the cable that plugs right into the motherboard.
  
-**3. Testing the motherboard port function+**3. Testing the motherboard port function
 ** **
 Connect to the motherboard using pronterface. You should see the temperature indicated in the bottom right corner. The temperature should increase if you put your finger on the thermistor, and the values should be reasonable. Connect to the motherboard using pronterface. You should see the temperature indicated in the bottom right corner. The temperature should increase if you put your finger on the thermistor, and the values should be reasonable.
Line 48: Line 48:
  
  
----- 
-// 
-// Temperature Sensors 
-// 
-#define TEMP_0_PIN         13   // Analog Input 
-#define TEMP_1_PIN         15   // Analog Input 
-#define TEMP_BED_PIN       14   // Analog Input 
- 
----- 
  
 +  //
 +  // Temperature Sensors
 +  //
 +  #define TEMP_0_PIN         13   // Analog Input
 +  #define TEMP_1_PIN         15   // Analog Input
 +  #define TEMP_BED_PIN       14   // Analog Input
 +  
 All you need to do, is swap the TEMP_1_PIN number, for the number of the broken port. Then, reflash the firmware. Hopefully now you will have a correct temperature measurement displayed on your printer! All you need to do, is swap the TEMP_1_PIN number, for the number of the broken port. Then, reflash the firmware. Hopefully now you will have a correct temperature measurement displayed on your printer!
  
 +For more info on the thermal safety systems in the Marlin Firmware, see [[/thermal-runaway|this page]].
  
a5/faulty-temperature-readings.1530184096.txt.gz ยท Last modified: 2018/06/28 21:08 by samuelpinches