Printing Machine Cylinder Synchronization via Virtual Master Axis
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Solution Overview
Problem
Existing printing machines face challenges in achieving precise and cost-effective imaging of substrates like paper webs, particularly due to mechanical coupling requirements and high operational costs associated with maintaining register accuracy.
Innovation Solution
A printing machine design featuring a gravure cylinder for applying a print layer and a second cylinder for imaging, both synchronized via a virtual master axis using electronic control, allowing for precise adjustment and operation without mechanical coupling, and utilizing drive motors for register-accurate operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical coupling is used to synchronize cylinders, then register accuracy is maintained, but device complexity and operational costs increase
Solution Approach 1:
The patent replaces mechanical coupling between cylinders with an electronic control system that uses a virtual master axis to synchronize cylinder positions. The control unit receives position information from the master axis and sends control signals to drive the cylinders, eliminating the need for direct mechanical connections while maintaining registration accuracy.
Solution Approach 2:
The patent introduces a virtual master axis as an intermediary between the physically uncoupled cylinders. This virtual axis serves as a reference that both cylinders follow through electronic control, enabling synchronization without mechanical coupling. The control unit acts as a mediator that coordinates cylinder positions based on the virtual master axis position information.
2Reliability
If mechanical coupling is used to synchronize cylinders, then register accuracy is maintained, but operational costs increase
Solution Approach 1:
The patent replaces the mechanical coupling system with an electronic control system that consumes less energy. The control unit processes position information from the master axis and sends electronic control signals to the cylinder drives, eliminating the energy losses associated with mechanical friction and wear in coupled systems.
3Reliability
If cylinders are physically coupled, then synchronization is achieved, but adjustment flexibility is reduced
Solution Approach 1:
The patent makes the cylinder system dynamic by enabling independent adjustment of cylinder positions through electronic control. The control unit can modify control signals to accommodate changes in cylinder positions or speeds while maintaining synchronization, allowing the system to adapt to different operating conditions without rigid mechanical constraints.
Solution Approach 2:
The patent replaces fixed mechanical coupling with a flexible electronic control system. The virtual master axis and control unit enable cylinders to be adjusted independently while maintaining angular synchronicity through electronic coordination, providing greater adaptability for different printing requirements and substrate types.
Data Source
Figure 1
AI summary
The invention relates to a printing press (10) comprising at least one first cylinder (20) designed as a gravure cylinder for carrying out a gravure printing process for applying at least one printing layer (22) to a substrate (12), comprising at least one second cylinder (28) designed for carrying out an imaging process different from a gravure printing process for imaging at least a partial area of at least one printing layer (22) applied to the substrate (12), comprising a printing stand (33) common to the cylinders (20, 28) on which the cylinders (20, 28) are at least rotatably mounted, and comprising an electronic computing device (34) designed to drive the cylinders (20, 28) in a register-containing manner depending on a virtual guide axis (36).