Thermistor table

I have Arduino gen 2 electronics reprap. I'm have a thermistor lying around my house and I'm wondering if I cound use it with for the extruder temp sensor. Here are the specs:

The thermistor is 10k. I'm using a 2.2k resistor with it. And all together their are 3 wires that are hooking up to the Arduino.

If someone could give me a thermister lookup table that I could just copy and paste in my code, that would be AWESOME!!

Thanks,
drummerboyx

This website has some info on how I set my thermistor up:

[webzone.k3.mah.se]

thanks,
drummerboyx

Hi drummerboyx

Well done for setting your thermistor. Would you mind sharing the values for other people? No point letting everyone else work it out from scratch.

Stephen

I'm accually still trying to figure out the correct values. I couldn't understand how to create a table using the python script so I'm just using trial and error. If you could help with the the script that would be great.

Hi drummerboyx

I haven't had a chance to looked at this. Tell me how you go.

Stephen

Ok, great.

I gave up on my odd thermistor. I removed the thermistor from the extruder. I'm now waiting until makerbot.com gets the temperature sensor v2.0 in stock.

I'm on hold AGAIN...

Thanks,
Elijah

To make the table you need to know the beta of the thermistor. You can get that from a catalogue or datasheet or take resistance measurements at two known temperatures and calculate it. [reprap.org]

You need to have Python installed. Linux PC's tend to have it by default but for Windows you can download it from here: - [www.activestate.com]

You then run the script with the following command line with your beta.

./createTemperatureLookup.py --r0=10000 --t0=25 --r1=0 --r2=2200 --beta=4066 --max-adc=1023

Where did you get the thermistor from? Not many are rated for the temperatures we use, i.e. 300C.

---

[www.hydraraptor.blogspot.com]

Hi

I was going to suggest a thermocouple but they are out of stock to.

Stephen

[store.makerbot.com]

yah, I looked at the thermocouple too. I'll let you guys know if it comes in stock.