Abstract:When dental CT is used to take X films, the turntable of dental CT needs to be frequently started and stopped.In order to achieve smooth starting and stopping of the motor, no impact, through understanding various acceleration and deceleration algorithms, a new 5segment Stype acceleration and deceleration algorithm was put forward. This algorithm was applied to the turntable of dental CT machine. Through the analysis of acceleration and deceleration algorithms, the acceleration and deceleration algorithm was simplified, and the correctness of the algorithm was verified by simulation. The comparison experiment between the designed algorithm and the traditional algorithm was carried out. It is proved that the designed algorithm can not only achieve a highly smooth speed, but also has a small vibration when running.