Wrong temperature at the hotend

[Khayrisill]

Good Morning everybody

I have some issue with the ABS and delamination, I print at 245 - 250 C, but it still does not work.
So I checked with a thermocouple and when I ask for 245 degrees It's actually 195 degrees...

This comes from the thermistor ? Because when I start the printer, it reads 24 degrees for the head and 24 for the bed, so that mean at room temperature everything look good.

For information, its a Rostock Max v2 with a Prometheus V2.

Thanks

[Jrjones]

Adjust the Beta value of the hot end thermistor in the firmware.
http://reprap.org/wiki/MeasuringThermistorBeta
http://forum.seemecnc.com/viewtopic.php ... eta#p91287

Thermistors should be calibrated for the temperature range in which they operate in, and each thermistor can vary a little bit.

[Khayrisill]

Yes, you are perfectly right.

Interesting topic by the way. Because I followed the instruction from Prometheus but is not enough.