Quote Originally Posted by Kokobi View Post
I wanted to print with the bed heater off but I can't find a setting in makerbot program to turn it off during print.
I just set it to 30deg. then noticed, when the print wouldn't start, that the display was showing 40deg when the printer was cold.
So I see when I first turn on the machine and check the temps monitor the two extruders are at 29deg. and the bed is 40deg. Since it's 29deg here today then two of them are correct.

Does anyone know how to calibrate the bed thermocouple on a CTC 3D printer ?
If you have the bed at the bottom of the machine when you preheat, the residual heat from the motherboard will rise naturally and heat the bed by 1 or 2 degrees, and if left long enough even more. My ambient temperature in the room is 26c and the bed reads 40c..

As Eagle said, the thermo couple not very accurate under about 50c, this goes for the Flashforges too, same thing. For me, off is off.. I just have to deal with whatever the temp is in the room, but I never need a cold bed... or never have in all the time ive been printing.