A roller wheel tower output shaft featuring two cam plates fixed to the input shaft, this separator has a mechanism design with parallel conjugate cams. It achieves the function of output shaft indexing through the rotation of the roller wheel tower driven by the two cam plates mounted on the input shaft. Suitable for larger pitch conveyor belt drives or for intermittent indexing with longer dwell times. Additionally, the three-piece heavy-duty design is more suitable for fast and long pitch conveyances, and also has a longer dwell time compared to the two-piece design.