Ahmed abdalla abdelhalimDr. Eltahir Mohamed Hussin22018-01-052018-01-052017-12-011858-6228http://hdl.handle.net/123456789/10011This paper aims at addressing the first stage of reducing the viscosity at the station of the folio, which is the furnace unit where the temperature and the amount of gas inside were controlled by control rings. (P, PI, PID) which were represented by the Matlab software in the form of curves, to determine the response speed of controller for the system, and to find the best stability for the best microcontroller. The controller was chosen as the best microcontroller gives better stability for the speed of its response to the system, which the results proved mathematically.