Welcome! Log In Create A New Profile

RepRap Software shows wrong temp from Thermistor

Posted by Al3x

Forum List Message List New Topic

Al3x

RepRap Software shows wrong temp from Thermistor
March 31, 2009 02:52PM

Registered: 16 years ago
Posts: 20

Hi experts winking smiley

just working at my RepRap machine - but struggeling with a problem.

I am using the Temperatur Sensore 1.1 (http://reprap.org/bin/view/Main/Temperature_Sensor_1_1)

If I fire up the RepRap Software it shows me sth about 400 degree... kind of wrong (no power on the nichrome wire)

I didn't change the Gcode Interpreter source ?!?

Do you have any hints for me?

Best Regards from Germany
Alex

Reply Quote

DaveR

Re: RepRap Software shows wrong temp from Thermistor
March 31, 2009 04:20PM

Registered: 16 years ago
Posts: 186

If the thermistor is disconnected or there is a broken connection somewhere you get all kinds of numbers out.

But for that kind of number , check your thermistor type and the settings in the .h file in the arduino software. if you have the wrong beta values you can get wrong temps.

Reply Quote

Al3x

Re: RepRap Software shows wrong temp from Thermistor
March 31, 2009 04:23PM

Registered: 16 years ago
Posts: 20

thanks, I will check and post tomorrow again

greetings alex

Reply Quote

Al3x

Re: RepRap Software shows wrong temp from Thermistor
April 01, 2009 04:41AM

Registered: 16 years ago
Posts: 20

So it was mi fault I forgot to put the comment away in ThermistorTable.h

// Uncomment the next line if you are using a thermistor; leave it if you have a thermocouple
#define USE_THERMISTOR

Greetings
Alex

Reply Quote

thatguy

Re: RepRap Software shows wrong temp from Thermistor
June 15, 2009 03:15PM

Registered: 15 years ago
Posts: 26

I have the same problem, but I uncommented it. Is there anything else it could be?