A Calculating Method for the Focusing Cam Machining Error of the Aero-Remote Sensor

To solve the problem of machining error caused by the analytical method of focusing cam of aeronautical remote sensor, a new method of cam processing error calculation based on dichotomy is proposed. Firstly, the analytic design method of disc-shaped direct-acting roller cam is given according to the motion law of cam mechanism, and the coordinate determination formula of theoretical cam profile and actual machining cam outline is established. Then, the coordinates are determined by the coordinate measuring machine, and the mathematical model of processing error of each point in the cam contour is established. Finally, the mathematical model of machining error in MATLAB is realized, and a direct drive roller cam in the focusing mechanism of an aviation remote sensor is taken as an example to verify this new method. The experimental data shows that the maximum machining error of the cam profile points can satisfy the requirement of the focusing cam error well. Being simple and reliable, the algorithm can be used as an effective basis for judging whether disc-shaped direct-acting roller cams meet the requirements of error.