I recalibrated the 3D printer to match the height of the conveyor belt. 

I then printed a few parts on the conveyor belt and manually rotated the belt forwards. The parts stuck well to the belt during the printing period, but they would not peel off while I tried to eject.

I have added a stationary shear to help the parts people off. With the stationary shear, the parts peel off perfectly.

[Figure 1: Stationary Shear Tool]

[Figure 2: 3D Printing Stationary Shear]