EP2243630B1 - Rotation printing machine with synchronisation of folding drive group - Google Patents

Description

The invention relates to a method for synchronizing one or more drives of a folding unit of a web-like objects processing printing machine with other drives of the printing press. The synchronization takes place in that these drives (both the folding unit and other functional components of the printing press) are synchronized to a common master axis via a common, real-time communication network, in ring structure (the latter known for example as "SERCOS ring"), according to the first part Furthermore, the invention relates to a rotary printing press with at least one folding unit, wherein the functional units of the printing press together with folding unit are movable by a plurality of first drives, which are nodes of a common communication network, according to the first part / preamble of claim 4.

In rotary printing presses, the functional components such as folding unit, printing cylinder of the printing unit, etc. are usually moved by individual electric drives. These must be synchronized with each other for register-based interaction so that the printed products can be produced in the required quality. The synchronization is usually done via a predetermined by a parent control, common master axis, based on which align the individual drives in their position and speed individually. The synchronization based on the leading axis usually has to include the folder or the folding unit of the printing press. This means that the functional components of the printing press, which are generally in physical engagement with the web-like object, such as folding unit with paddle wheel and knife cylinder, draw-in and pull-out mechanism for the object web, roll changer, etc. (so-called "folding drive group") are moved by a specific offset must be in order to achieve synchronization with the higher-level master axis.

EP 1 772 263 A1 teaches to integrate all individual drives that are mechanically independently driven, including those of the folder, infeed, reel splitter and other draw rolls, into ring-type real time cross-communication buses as a communication system to synchronize with each other by transmitting a synchronization clock generated in higher level controls. Thus, the folder is synchronized, starting from an initial state, on a master axis by its drives to align with transmitted via the real-time bus setpoint inputs of the master axis. In addition, it is provided that in the folder or the folding unit transporting auxiliary units such as feeder or pull-out or the like to perform movement of the folding unit during their Aufsynchronisierens position and speed synchronous movements. At the in EP 1 772 263 A1 However, it is necessary for the concept that all drives, including the drives associated with the folding auxiliary units or the reel changer, to be designed for data communication in the ring-type real-time bus, which increases the demands on the communication intelligence of the drive components to be used and thus the procurement costs thereof.

US 2006/207450 A1 describes a drive device and a method for controlling a functional unit of a printing machine with a virtual master axis to achieve an angular desired position of a drive of this functional unit. In particular, it is described to drive drives with pulse sequences from an emulator. However, the pulse sequences are generated exclusively from the leading axis from a bus system. Alternatively, it is proposed to generate the pulse sequences directly from a drive control for the bus and, as it were, only forward it by means of the emulator.

The invention has for its object to simplify in a rotary printing machine with synchronization of the Falzantriebsgruppe the synchronizing Leitachs setpoint specification. For the solution, reference is made to the specified in claim 1 synchronization method and specified in the independent claim 4 rotary printing press. Advantageous, optional embodiments of the invention will become apparent from the dependent claims.

According to the invention, in the printing press, in particular rotary printing press, drives are still arranged and operated outside the communication network or network (so-called "second drives"). When selecting the drive components for it is not limited to compatibility with the communication network. The requirements for the communication capability of the drive components and thus the costs thereof are advantageously reduced. It is important that the second drives each have one encoder input, in particular incremental encoder input, which is almost always available with standard drives.

According to a second feature of the invention, at least one drive synchronized via the communication network or via the communication network is directly or indirectly derived, as it were, tapped and converted into pulse sequences or analogue signal forms corresponding to the output signals of a position, velocity and / or acceleration sensor. For example, correspond to an incremental encoder, resolver or a Ferraris acceleration sensor. Thus, the advantage of compatibility with the respective standard encoder input marketable drive components is achieved, and the latter can be synchronized with the connected via the communication network drive network to the master with little effort.

According to the invention, the encoder signals for the second ("external") drives of the printing press are generated by a real sensor which is coupled to a real axis, for example rotatable shaft, of one of the first drives operating in the communication network. This real sensor may be, for example, a "real" incremental encoder. The corresponding sensor, in particular incremental encoder output signal, which includes the synchronizing Leitachs setpoint specification, can be easily fed at a standard encoder input realized with conventional drive components second drives.

Optionally, one or more transmitter emulators can additionally be used to communicate with controllers or other nodes of the first drives operating or communicating with one another in the communication network or network in order to generate sensor-like signals. The one or more encoder emulators can then receive data on the input side which contain synchronizing leading axis setpoint specifications. In the course of emulation, these are artificially converted into encoder or sensor-like output signals for the respective encoder standard input.

In principle, the invention opens up the possibility of incorporating drive units, which are not contained in the communication network, in the synchronization of the folding drive group (all drives / units which are in engagement with the object track). It becomes possible to include or integrate these "second" drives / units in the synchronization movement of the folding drive group.

According to a particularly advantageous embodiment of the invention, the basic principle of the invention can be applied to the reel splicer of a printing press: According to the prior art discussed at the beginning ( EP 1 772 263 A1 ), the reel changer drive must belong to the category of "first" drives, namely to be part of the network of drives connected via the communication network. Alternatively, the paster could be controlled in connection with the web tension or the settlement of the object web by a known dancer roller. This type of control can be understood as a P-controller (proportional controller). With this type of regulator, however, the disadvantage is associated with the fact that always first a control deviation must arise, so that a manipulated variable arises. In contrast, it is proposed according to the invention to derive encoder signals from the drive and / or communication network of the first drives and to supply them to a customary standard encoder input of the reel splitter drive.

The following description of an embodiment not covered by the claims with reference to the drawing is used to explain the claimed invention only by analogy. The drawing shows in the single figure is a schematic block diagram with befindlichem device diagram of an embodiment of the synchronization system for the folding drive group.

According to the single figure is in a rotary printing machine in a conventional manner by a roll changer 2 via a dancer roller 3 for controlling the mechanical tension of the object web, via a feed roller 4 or other feed train, two or more printing units DE01, DE02 (for example Printing towers each with eight blanket and eight plate cylinders and eight pairs associated drive motors M), via a pultrusion 5 with several associated drive motors M and a guide roller 6 to be processed web-shaped object or object web 1 in a folding unit FE01 with associated drive motors M, for example Knife cylinder, paddle wheel, etc. transported. Each drive motors M are each assigned drive controllers R, which are integrated in a conventional manner in communication networks in the form of, for example, annular real-time fieldbus systems with cross-communication Q with each other. Corresponding communication rings are available on the market, for example, under the name "SERCOS". In a higher-level control level L, a plurality of control units S are located, which for the most part or at least partially communicate with a drive rotor R of a respective SERCOS drive and communication ring designed as a bus master BM. About the respective bus master BM, which receive from the parent control level L synchronizing Leitachs-setpoint specifications such as speed and / or acceleration setpoints, and the cross-communication ring Q, these synchronizing Leitachs setpoint specifications to other bus masters other local SERCOS rings and also a Geberemulator GE distributed, which is also connected to the SERCOS ring bus to the transverse communication Q and is in communication with a dedicated control unit S.

Not included in the SERCOS communication rings is an external drive controller R _ext , which controls the drive motor for the reel splitter 2. The reel changer 2 with its drive R _ext , A belongs to a drive group I, which includes the drives of the aggregates / functional components engaged with the paper or object web 1 (draw-in roller 4, pull-out unit 5 and folding unit FE01 and optionally other). The further drive group II includes with the respective associated drives R, M, the printing units DE01, DE02, which in a pre-production phase still in the "pressure-off" position, but not yet in the "pressure-on" position, So not yet in engagement with the object web 1.

With the method according to the invention, it is fundamentally possible to synchronize drives which are not integrated in a SERCOS communication ring during the synchronization of the folding unit FE01. To reduce paper waste, the FE01 folding unit must be positioned in the shortest possible time to a synchronized position relative to the leading axis. For this purpose, all functional components of the drive group I, ie in engagement with the paper or. Object lane 1 are adjusted with a speed that is identical relative to the object lane. This is easily possible for the drives R, M, which are combined in the SERCOS communication rings and thus can be reached in terms of communication technology for synchronizing the leading axis setpoint specifications. Other, not integrated in the SERCOS communication ring drives, as in the present embodiment, the role changer 2 with downstream dance control 3, are not accessible to the Leitachs setpoint specifications via the SERCOS communication rings, but only indirectly.

For this purpose, according to the illustrated embodiment, the fact is used that almost all marketable drives have an incremental encoder input IE, which can be used via circuit and / or programmatic means also for setpoint specification. In the present case, the encoder emulator GE is integrated as an assembly for generating incremental encoder signals into the SERCOS transverse communication ring or branch Q (part of the communication network Eercos ring), which also serves to synchronize the folding unit to the leading axis. As a result, can via this cross-communication ring Q, the master emulator also receives synchronizing leading axis setpoint inputs, converting them into corresponding pulse train track signals typical for incremental encoders (cf. EP 1 311 934 B1 ) and the outside of the communication network settled, external drive _controller R _ext the roll changer 2 out. The pulse tracks 7 simulated by the encoder emulator, which are typical for incremental encoders, are then synchronous with the leading axis setpoint specifications for the folding unit FE01.

With the principle illustrated by means of this exemplary embodiment, it is basically also possible to make synchronous nominal value specifications for external drives, which are not integrated in a synchronous communication network, and to synchronize them to the same master axis which predominates in the communication network. Otherwise, the "second" drives, which are not integrated in the communication network, would be excluded from the synchronization process, for example from the fold synchronization with drives / units / functional components located in the path. With the inventively proposed integration on the basis of the Leitachs setpoint specifications based encoder signal generation in the illustrated, not covered by the claims, purely illustrative embodiment Geberemulation GE, the non-integrated function components in addition to their drives, such as reel splitter 2, immediately follow the synchronization movement, if Leading axis setpoint input to the first drive units R, M located in the communication network. In particular, according to the above embodiment, in connection with the dancer control, a too large control deviation and the associated risk of paper tears are avoided.

LIST OF REFERENCE NUMBERS

1

object path

2

reelstands

3

dancer roll

4

feed roller

DE01

printing unit

DE02

printing unit

M

drive motor

5

excerpt

6

deflecting

FE01

folding unit

R

drive controller

Q

cross communication

L

Leitsteuerungsebene

S

control unit

BM

bus master

GE

transmitter emulator

R _ext

external drive controller

IE

Incremental

7

emulated encoder signal

Claims (5)

1. A method for the synchronisation of one or more drives (R,M) of a folding unit (FE01) of a printing press that processes web-like objects (1) with additional drives (R,M) of the printing press, these first drives (R,M) being synchronised in a common communication network (Sercos ring) in the form of an annular real-time fieldbus on a common command axis, one or more second drives (R_ext,M) being operated in the printing press outside of the communication network (Sercos ring), which drive or drives is or are each provided with a transmitter input (IE) and synchronised on the command axis of the communication network (Sercos ring), position transmitter and/or velocity transmitter and/or acceleration transmitter signals being generating depending on synchronous assigned target values of the command axis in the communication network (Sercos ring) and being delivered as target values to the respective transmitter inputs (IE) of the second drive or drives (R_ext,M), characterised in that in order to generate the transmitter signals a real axis of one of the first drives (R,M) operating in the communication network (Sercos ring) is sampled by a sensor for position, velocity and/or acceleration, and the corresponding sensor output signal is delivered to the one or to the plurality of second drives (R_ext,M) as a target value.
2. The method according to Claim 1, characterised in that at least some of the first and second drives (R,M; R_ext,M) are brought into contact with the common web-like object (1) at the same time during the folding synchronisation process.
3. The method according to any of the preceding claims, characterised in that some of the drives (R,M) or the printing press functional components moved with them, in particular printing units (DE01,DE02) or printing cylinders, are kept out of contact with the web-like object (1) during the folding synchronisation process.
4. A rotary printing press with at least one folding unit (FE01) as one of functional units that can be moved by several first drives (R,M) which are nodes of a common communication network (Sercos ring) in the form of an annular real-time fieldbus, by means of which the first drives (R,M) can be or are synchronised on a common command axis, in particular in order to implement the method according to any of the preceding claims, with one or more second drives (R_ext,M) each provided with a transmitter input (IE), which are arranged and are operated outside of the communication network (Sercos ring), a transmitter signal generator (GE) being coupled to at least one of the first drives (R,M) and/or to the command axis within the communication network (Sercos ring), which transmitter signal generator is connected at its output to the transmitter input or inputs (IE) of the second drive or drives (R_ext,M) which are configured by software and/or circuitry to use the transmitter input (IE) for synchronised assigning of setpoints, characterised in that the transmitter signal generator is designed as a position, velocity and/or acceleration sensor and is coupled to a real axis of one of the first drives (R,M) operating in the communication network (Sercos ring), and a corresponding sensor output signal is delivered to the transmitter input or inputs (IE) of the second drive or drives (R_ext,M).
5. The rotary printing press according to Claim 4, a reel changer (2) being connected to a second drive (R_ext,M) operated outside of the communication network (Sercos ring), characterised in that the transmitter signal generator (GE) is connected by its output to the reel changer drive (R_ext,M) and/or its transmitter input (IE).

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