Can decorator inspection and control system and adjustment assemblies

A control system for a can decorator structured to apply images to cans, the control system comprising:

• a can inspection system structured to capture images of a can;
• a controller structured to receive the captured images and to analyze the captured images to determine a quality of the image applied to the can based on a comparison of the captured images and a reference image;
• and
• an adjustment assembly structured to adjust a circumferential or translational position of a plate cylinder attached to a plate cylinder shaft end of a plate cylinder shaft, the adjustment assembly including at least one stepper motor, wherein operation of the at least one stepper motor causes the circumferential or translational adjustment,
• wherein in response to determining an image registration error based on a comparison of the captured images and the reference image, the controller is structured to determine an excitation period and frequency based on the image registration error and to control the at least one stepper motor according to the determined excitation period and frequency,
• wherein the adjustment assembly comprises:
• a translation ring coupled to the plate cylinder shaft such that rotation of the translation ring causes a circumference adjustment of the plate cylinder shaft and the plate cylinder attached to the plate cylinder shaft end,
• a guide structure disposed proximate the translation ring, and
• cam followers attached to the guide structure and operatively coupled to the translation ring such that rotation of the cam followers causes rotation of the translation ring,
• wherein the at least one stepper motor is operatively coupled to the cam followers such that operation of the at least one stepper motor causes rotation of the cam followers.