Octopus pro v1.01
RPI 3
I Have not provided a klippy as I have not even connected the thermocouple yet so I have not experienced any errors.
I have checked the knowledge base and did not see anything I thought I would ask in case anyone has successfully connected a k type thermocouple to Ebb36.
I know that the onboard max chip is capable of reading temperature from said thermocouple and I was given some interesting nozzle heaters with a built in K type to try. I could probably modify the heaters to accept a pt1000, However I would prefer to keep them intact so that I can give accurate and honest feedback to the manufacturer, Any information will be greatly appreciated and I will be sure to post any and all of my findings.
as always thank you Klipper community, and happy printing!
I don’t think your board will read a thermocouple.
Thermocouples are fundamentally different than thermistors (pt1000 is in fact a thermistor). The Seebeck effect is related to the temperature DIFFERENCE between 2 junctions. A low cost thermocouple “reader” uses a thermistor to measure the temperature of the “reference junction”
and calculates the offset from the volts read. 2 measurements = 2x the error band. https://www.allaboutcircuits.com/technical-articles/what-is-cold-junction-compensation-in-thermocouple/
What MAX chip is available on board? I’m not familiar with the hardware you have listed. Some MAX chips are able to read thermocouples but unless it specifically has that capability (like a MAX31855) you will need additional hardware to handle it.
Something like this would probably be the easiest way for you to test that. I think the code could be done entirely in python, no mcu code needed. The chip handles all the hard parts of using thermocouples.