Fixed Activation Sensor Timing Compensation in Sheet-Fed Printing

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Solution Overview

Problem

The existing methods for sheet running control in sheet-fed printing machines are prone to errors and time-consuming due to the complex adjustment of activation sensors, which are susceptible to machine vibrations and various parameters, leading to incorrect detection of sheet presence or absence.

Innovation Solution

A computer-aided method where a mechanically fixedly installed activation sensor eliminates the need for adjustments by determining and compensating for temporal deviations in the activation signal, allowing the measuring sensor to activate at the correct time without manual calibration, using a learning run at a constant speed to calculate and apply a compensation factor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the activation sensor is adjusted manually to achieve exact activation timing, then the sheet running control accuracy is improved, but the installation and servicing time increases significantly and error susceptibility increases

Engineering Contradiction:

Improvesheet running control accuracyVSAvoidinstallation and servicing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the mechanical adjustment system with an electronic/software-based solution. The activation sensor is fixedly installed without mechanical adjustment capability, and the activation timing is corrected through software-based temporal deviation determination and compensation. This substitution eliminates the time-consuming mechanical adjustment process while maintaining accurate sheet running control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the parameter of activation sensor adjustability from 'adjustable' to 'fixedly installed'. By fixing the sensor position and using software to determine and compensate for temporal deviations, the system transforms the adjustment process from a manual mechanical task to an automated electronic correction process, reducing installation time while maintaining precision.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the activation sensor is adjusted manually to achieve exact activation timing, then the sheet running control accuracy is improved, but the error susceptibility increases due to complexity of adjustment process

Engineering Contradiction:

Improvesheet running control accuracyVSAvoiderror susceptibility

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent replaces the error-prone mechanical adjustment process with a software-based temporal deviation compensation system. The fixedly installed sensor combined with electronic determination and compensation of timing deviations eliminates human error in manual adjustment, improving reliability while maintaining measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system performs self-correction by automatically determining temporal deviations and applying compensation factors without requiring manual intervention. The activation sensor system self-adjusts its timing through software calculations based on detected deviations, eliminating the need for skilled manual adjustment and reducing errors.

Inventive Principle:

Principle #25Self-service

3Loss of time

If the activation sensor is fixedly installed without adjustment, then the installation and servicing time is reduced, but temporal deviations in activation signal occur requiring compensation

Engineering Contradiction:

Improveinstallation and servicing timeVSAvoidcomplexity of temporal deviation compensation

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical adjustment complexity with software-based temporal deviation compensation. Instead of providing mechanical adjustability, the system uses electronic determination and calculation of timing deviations, followed by software-based compensation, simplifying the physical device while managing complexity through digital processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If the activation sensor is fixedly installed without adjustment, then the robustness of the system is improved, but the activation timing may be premature or delayed

Engineering Contradiction:

Improvesystem robustnessVSAvoidactivation timing accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical adjustment with software-based temporal deviation compensation to maintain activation timing accuracy. The fixedly installed sensor provides robustness, while the electronic determination and compensation of timing deviations ensure that premature or delayed activation is corrected, maintaining measurement precision without requiring mechanical adjustability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11427020B2Method and system for improved sheet running control in a sheet-fed printing machine

Publication Date: 2022.08.30 MICROSONIC GMBH

AI summary

A method for computer-aided sheet running control in a sheet-fed printing machine includes, during a printing operation, using a measuring sensor to detect a printed sheet in the printing machine and using an activation sensor to initiate measuring performed by the measuring sensor by emitting an activation signal. The activation sensor is mechanically fixedly installed without adjustment, and temporal deviations of the activation signal are determined and compensated. A system for computer-aided sheet running control in a sheet-fed printing machine is also provided.