Hello, I am trying to use MAX31855 Sener to instead NTC100k to measure the tempture of HOT END.
Now I can get the tempture like this:
but after a short while error report like this:
or like this:
after I klick FIREMWARE RESETART the tempture show is this:
In this time i do not do any operations, do not touch any thing.
I don’t why, is there some one can help me?
Thank you.
here is my log file:
klippy.log (2.0 MB)
The errors you are seeing are created by the MAX81855 chip and point to a hardware / wiring issue.
Note that the MAX81855 is very sensitive to external influences. E.g. it cannot handle grounded probes. This means when your temperature sensor touches some metal and gets a ground potential (or any other voltage potential) the chip will go into an error state
OK, thank you.
I send it back to the seller.
I buy a new mx31865 chip.
