I am in the process of buttoning up a Nitehawk conversion on my Voron. I also replaced my extruder thermistor with an OE replacement purchased from a reputable vendor.
Post setup, my heated bed is reading spot on (it's 18.3 C in my basement aka 65 F). I verified that my extruder is also at ambient temperature by wedging a Thermapen under its silicone sock and letting it acclimate for 10 minutes. The I'm not sure why the extruder would be reading high.
I bought a spare thermistor and wired it in. The result was identical.
Thoughts? Ideas? I'm pretty sure I have the Nitehawk and thermistor set up correctly.
[extruder]
step_pin: nhk:gpio23
dir_pin: nhk:gpio24
enable_pin: !nhk:gpio25
heater_pin: nhk:gpio9
sensor_pin: nhk:gpio29
pullup_resistor: 2200
sensor_type: ATC Semitec 104NT-4-R025H42G`
Agree that this seems like a bigger than desired difference.
Thanks for the point of reference. I am going to be doing some measuring and math tonight to try to figure out where the source of error is and how much it might/not matter when hot.
Before nitehawk I was using the same hot end and I copied the thermistor type from my prior config while setting up. The bed and extruder were much closer to each other when cold then.