having a little trouble finding this temp_chart.py this is probably a silly question but from the perspective of newbie like me when I read look into “that” but without saying where is “that” is so frustrating…
naturally I went to wiki and bitbucket but still can’t find this temp_chart.py can anyone point me to the right direction. Thx
Temp charts are outdated, look in the default.cfg for an explanation of how to use the Steihart-Hart algorithm!
Yeah saw that algorithm. Was hoping I can avoid that route… but ok will give it a shot
is there a short video about setting up thermistor and PID tuning guide?
did the algorithm as best as I could. this is for Semitec 104NT-4-R025H42G thermistor. found the data sheet and plug in the R1T1 to R3T3. it spits the following calculated number. However, where do I go from here?
Step, is this a new thermistor that has not been used before? If so, we need to get it into mainline. The small hot end you are experimenting with looks like it is light weight, which is something that might be good for my Delta. Take a look at the temperature sensor file and see if you can decifer how to add your own sensor: https://bitbucket.org/intelligentagent/redeem/src/8d6135603d203732658f239b4fa2304f1c4e73de/redeem/TemperatureSensorConfigs.py?at=master&fileviewer=file-view-default
so Basically c1,c2 and c3 are A,B and C values respectively from the calculated steinhart model coefficient I don’t know what is “r” value of 4700.
I tested the calculator with 104GT-2 data and the all 3 c values are accurately reproduced by the calculator so the A B C snap shot calculated above should be accurate
can this Semitec 104NT-4-R025H42G thermistor be added to the list with above A B Cs number? or do you need anything else? thx
Is this something that can be added to printer config?
Yes, you should definitely add this to your printer.cfg. Do you mean to add the C values directly? There is no support for that yet, but there should be, at least for testing.
Is there a guide on how to add this to printer config? Since this one is not listed, I assumed i will need to pick any listed one and modify its values in http://default.cfg?
Since you are using a new thermistor that has not been added yet, you need to add it yourself. The only way to do that right now is to edit the file directly. The easiest is perhaps to use SSH/putty to log in to your BBB and edit the file directly.
So basically I need to SSH into BBB find http://TemperatureSensorConfigs.py and add a new line there give it a new name and the corresponding C1,2,3 values. Save and use this new name in my printer config?
I think I figured it out with some help of course 
https://plus.google.com/+StephenCia/posts/4keNDJ5R8q9
