This effect can be visualised using thermal imaging technology.
Cooling of the consumable is by means of several individually controlled air jets giving multi-zone control of cooling too.
Temperature measurements are made using an array of non-contact Infrared temperature sensors.
This heating and cooling is under the control of a complex algorithm. To deliver the temperature response required the control algorithm decides which heating pattern to use and the amount of heat to be generated. This measurement, calculation and heating cycle happens 100 times per second and the system delivers a thermal accuracy and uniformity of ± 0.3°C.