New Thermistor Installing
New Thermistor Installing
Hello, I am planning to change the thermistor from my Geeetech I3 Pro C printers. My printer has GT2560 Board. I am wondering about the technical specifications of thermistor used in my system. I have some 100K-ohm 104GT-2 NTC thermistors. Can I use these thermistor in my printer's hot-end? If so, do I need to change anything in the firmware? Please advice me what are the steps to do so. Thank you very much.
Re: New Thermistor Installing
Hello, I have tried using Semitec 104GT-2 100k thermistor with Geeetech Pro C. I changed the Marlin firmware like below:
#define TEMP_SENSOR_0 5
#define TEMP_SENSOR_1 5
#define TEMP_SENSOR_BED 5
In the original firmware, "1" was used. But I think the thermistors I am talking about need "5" in these fields. I feel, it measures the temperature correctly with this new settings/thermistor. The only problem I am facing is, I can see in the LCD that temp measurement is quite slow. I mean, the actual temp probably have already reached to the set temp, but LCD is showing (due to slow process, I guess) temp what actually was before 15/20 sec. So, it overshoots greatly. After a long time, when temp gets steady, no more fluctuation, then LCD shows the correct temp. This is why I belief the sensor is working well. But probably I am missing something. I am just wondering, is it something like, P, I, & D values in the firmware are not optimal for this thermistor? Please help me advising how can I use this new thermistor here. Thank you very much.
#define TEMP_SENSOR_0 5
#define TEMP_SENSOR_1 5
#define TEMP_SENSOR_BED 5
In the original firmware, "1" was used. But I think the thermistors I am talking about need "5" in these fields. I feel, it measures the temperature correctly with this new settings/thermistor. The only problem I am facing is, I can see in the LCD that temp measurement is quite slow. I mean, the actual temp probably have already reached to the set temp, but LCD is showing (due to slow process, I guess) temp what actually was before 15/20 sec. So, it overshoots greatly. After a long time, when temp gets steady, no more fluctuation, then LCD shows the correct temp. This is why I belief the sensor is working well. But probably I am missing something. I am just wondering, is it something like, P, I, & D values in the firmware are not optimal for this thermistor? Please help me advising how can I use this new thermistor here. Thank you very much.
Re: New Thermistor Installing
is your new thermistor reads the temp correctly? I mean you can use an original one and a new one, set them to the same temperature and verify it.
don't know much about the PID thing, never study it before...
don't know much about the PID thing, never study it before...