A centrifugally progressively engageable drive assembly for a vehicle such as a motorcycle or auto which employs a mechanical clutch to interrupt engine power to the transmission during gear changing and terms of vehicle idling. Personnel utilize features of the printer to manage products, store information on labels, and aid in shipping. There is a shift register chain, having a stage for columns of the array. Cameras detect objects and generate image signal. The development can be on press with ink andor fountain solution or off press with a liquid developer.