I have been haven som troubles extruding PLA with temperature set to 190 degrees, so I have mounted a thermocouple type K on the outside of the hotend, just next to the EPCOS100K.
The 2 sensors seems to read very different temperatures. It seems like the EPCOS100K is reading to low temperature since I can extrude PLA with temperature set to 212 which then gives me approximatly 190 degrees on the external thermocouple.
To me it seems like this issue has nothing to do with the PID settings since the temperature is really stable, it is just to low.
What could cause this?