Patent ID: 11904414
Assignee: CROWN PACKAGING TECHNOLOGY, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A method of controlling a welding station used for welding seams extending along cylindrical can bodies, the welding station comprising a pair of welding rolls and a calibration unit for causing a desired cylinder overlap during welding, the method comprising:
monitoring welded seams and providing an electrical signal indicative of the weld thickness at a series of predetermined points along a seam length;
generating one or more control electrical signals in response to said electrical signal indicative of the weld quality of welded seams; and
providing the one or more control electrical signals to one or more of a plurality of adjustment mechanisms configured to adjust the calibration unit relative to one or more of the three adjustment axes, to cause the desired cylinder overlap,
wherein the adjustment mechanisms are responsive to the control signal(s) in order to adjust: a radial position of a roller of the calibration unit relative to a direction of movement of cylinders through the weld station; a longitudinal position of the calibration unit along an adjustment axis perpendicular to a line passing through a centre of each welding roll; a combination thereof,
wherein one of the adjustment mechanisms adjusts the radial position of a roller of the calibration unit using a co-operating dual-thread system operable using an encoded motor and gearbox.