integrated register control

Principles of register control Camera system Closed loop control HMI – operating and observing Example Basics Register adjustment Controller structure

Principles of color printing What is the register ?

Copyright © Siemens AG 2008. All rights reserved.

Integrated register control Principles of color printing

Integrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR

Application in:

Rotogravure printing Offset printing

Flexographic printing

Principles of color printing What is the register ? Principles of register control

Camera system

Closed loop control HMI – operating and observing

Example

Basics

Register adjustment

Controller structure

Slide 3 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR

  Integration of the register-control in the motion control system   Calculation of the register control algorithm processed by the drive controller   Process-data directly monitored in the drive controller   Corrective actuation transferred via internal interfaces with rather no delay time

+  accurate und efficient register control +  suitable for all types of printing methods +  customer specific solutions possible +  open-interface of the register control system +  no additional cabinets needed +  no additional controller-components needed +  integration of the register operation into the machine operation +  individual size and geometrie of printing marks possible +  production specific archiving and reusability

Characteristics

Characteristics


Camera system


Example

Basics

Register adjustment



Yellow, Magenta, Cyan, Black

Principles of color printing

1.DW 2.DW 3.DW 4.DW

Each printing couple applies one color on the printing material.

In multicolor printing the image is split into the basic colors Principles of color printing


Camera system


Example

Basics

Register adjustment



What is the register ?

The color register in multicolor printing is the position match of the seperated colors relative to another.

register deviation without register control

register deviation with register control

What is the register?


Camera system


Example

Basics

Register adjustment



What is the register ?

A register control system is needed to maintain the color register in the machine. Therefore each printing couple prints an additional information e.g. a printing mark. This printing mark is the basis for the register control system.

1.PU 2.PU 3.PU 4.PU

example for

printing marks

What is the register?


Camera system


Example

Basics

Register adjustment



Principles of register control

measurement

Visualization / Operation

printing marks

corrective actuation Sensor/ Camera

Calculation of register deviation control loop algorithm

Visualization of register difference Register control Corrective actuation

Measurement of register marks

register deviation

Principles of register control


Camera system


Example

Basics

Register adjustment



parametrization

measured values

image data

intelligent camera-software

control- algorithm

corrective motion of the axis

Ethernet

Camera system

  The camera system is the key component of the register control system   The flash and complete analysis of the picture is implemented in the camera system

Camera integration in the SIMOTION - Controller


Camera system


Example

Basics

Register adjustment



Closed loop control

  The closed control loop is realized in a SIMOTION Control Unit.

  The integrated implementation is superior to existing systems.

  The camera is directly connected to the Simotion controller.   The register controller are interconnected by the

drive bus system.

disturbance i. e. from winder

Siemens Motion Controller Competitor

disturbance i.e. from winder

register error register error

Closed lool control

  The controller structure and setup guideline was developed together with an university.


Camera system


Example

Basics

Register adjustment



HMI - operating and observing

  The operator interface can be integrated into the HMI system of the machine.

  With a multi-user system the interface is available from any operator panel.

HMI – operating and observing


Camera system


Example

Basics

Register adjustment



Example – Configuration of a Rotogravure Press

SIMOTION D HMI

Ethernet

Example


Camera system


Example

Basics

Register adjustment



ε1, σ1

R1

a2

v2 v1

ε2, σ2

Nip point 1 (infeed)

Nip point 2 (1.PU)

E

R2

a2 ... fixed lengh E ... elasticity module ε ... web stretch σ ... web tension v ... web speed

1.PU 2.PU 3.PU 4.PU Infeed

Basic mechanism of web transport

Basics


Camera system


Example

Basics

Register adjustment



Nip Roller 2 Nip Roller 3 Nip Roller 1

Schematic diagram for register simulation

Basics


Camera system


Example

Basics

Register adjustment



1.PU 2.PU 3.PU 4.PU Infeed

3700 3720 3740 3760 3780 3800 3820

0

0.2

0.4

0.6

0.8

web tension change at the infeed

regi

ster

[mm

]

time [s]

Y 12 Y 13 Y 14

disturbance

Simulation of a web tension change

Basics


Camera system


Example

Basics

Register adjustment



3700 3720 3740 3760 3780 3800 3820 -0.4 -0.2

0 0.2 0.4 0.6 0.8

1 Comparison between Register Change (1mm) with Compensator Roller (RC) and Print Unit Drive (PU)

Regi

ster

[mm

]

time [s]

Y 12 PU Y 13 PU Y 14 PU Y 12 RC Y 13 RC Y 14 RC

Change Move 1mm/s

  RC: Coupling by Length Change and Stretch   PU: Coupling by Stretch   RC: Register Change by Compensator Roller   PU: Register Change by Print Unit Drive

Impact of Register Adjustments

PU 1 PU 2 PU 3 PU 4 Infeed

PU RC

Register adjustments


Camera system


Example

Basics

Register adjustment



0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 G2 L Register Error (ohne Entkopplung) (mm) G2 L Register Error (mit Entkopplung) (mm)

Sec

-1.25 -1.00 -0.75 -0.50 -0.25 0 G3 L Register Error (ohne Entkoplung) (mm) 1_G3 L Register Error (mit Entkopplung) (mm)

Sec

-0.9 -0.7 -0.5 -0.3 -0.1 0.1 G4 L Register Error (ohne Entkopplung) (mm) 1_G4 L Register Error (mit Entkopplung) (mm)

Sec 17:01:50 17:02:00 17:02:10 17:02:20 17:02:30 17:02:40

r

r

r

0 0.5 1.0 1.5 2.0 2.5 3.0 G2 L Register Error (ohne Entkopplung) (mm) G2 L Register Error (mit Entkopplung) (mm)

Sec

-1.00 -0.75 -0.50 -0.25 0 G3 L Register Error (ohne Entkopplung) (mm) 1_G3 L Register Error (mit Entkopplung) (mm)

Sec

-0.7 -0.5 -0.3 -0.1 0.1 G4 L Register Error (ohne Entkopplung)

1_G4 L Register Error (mit Entkopplung) (mm)

Sec 17:23:15 17:23:25 17:23:35 17:23:45 17:23:55

r

r

r

v = 200 m/min v = 100 m/min

PU 1 PU 2 PU 3 PU 4 Infeed

Impact of Register Adjustments

Register movement on PU2 is impacting the register of the following units   Register influence without decoupling (register controller off)   Decoupling function active (register controller off)

Register adjustments


Camera system


Example

Basics

Register adjustment



pre-control &

decoupling register error measurement

decentralized drive concept with interconnected algorithm

register closed loop controller


Modular Controller Structure

integrated register control

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