Light wedges that reflect light internally and produce diffuse light for uniformly illuminating a platen in a print scanner are presented. Images may be automatically captured at predetermined distances of travel, or may be automatically captured based on the output signals from the auto-focus, auto-exposure andor auto-white balance engines indicating, for example, that the camera motion within the pipe is substantially zero. The method then includes translating the synchronizer away from the predicted gear, coupling and decoupling the second clutch to and from the torque generator, and mating the synchronizer to the predicted gear to again apply the load in the direction.