I just installed a new hot end (J-Head MK-V) on my Prusa I3, made no other changes, and Pronterface is telling me that the temp on the hotend is 200 when it is cold! I measured the resistance of the thermistor and get 106K which is the same as what the old one got. When I turn on the hotend this resistance falls. And finally, when I connect the old thermistor...same bogus reading being returned. When I connect the hot point thermistor to the bed pins it is read correctly. Could I have somehow fried the circuit for the hot end reading? I dont know Marlin well enough to know how to move the pins for the thermistor to the free set on the Ramps board....
Cheers, Wisar
Edited 1 time(s). Last edit at 02/17/2014 06:53AM by Wisar.
