Just curious, I own a DaVinci 1.0 and I guess I've never thought about

Just curious, I own a DaVinci 1.0 and I guess I’ve never thought about the auto calibration…is it using a temp spike on the thermistor to tell when it touches?

Check online manual

No mention of the method…it just magically happens. XYZPrinting doesn’t have the best documentation.