EP0775055A1

EP0775055A1 - Screen or stencil printing machine

Info

Publication number: EP0775055A1
Application number: EP95929823A
Authority: EP
Inventors: Alfred Eppich; Gerhard Tropschuh; Hans Polan
Original assignee: F Xaver Leipold & Co KG GmbH; Leipold Xaver F & Co KG GmbH
Current assignee: F Xaver Leipold & Co KG GmbH
Priority date: 1994-08-12
Filing date: 1995-08-09
Publication date: 1997-05-28
Anticipated expiration: 2015-08-09
Also published as: JPH10507696A; WO1996005059A1; EP0775055B1

Abstract

A screen or stencil printing machine has at least the following functional elements: a permeable or screen-like printing form, stencilled according to the desired image or pattern; a doctoring system that sweeps over the printing form for pressing the paint through the painting form on a printing material; and a regulating member for contacting the printing form with the printing material and for moving the printing material away from the printing form. At least two of said functional elements are linearly guided and are linked each to a separate driving unit. The driving units can be co-ordinated and actuated by a common drive control system so that said relative movements between functional elements may be matched or synchronised. The machine is characterised in that one or several linearly guided functional elements are directly linked to the rotor of an associated electromotor that linearly drives them.

Description

Screen or screen printing machine

The invention relates to a machine for screen printing or screen printing, which as a functional component has at least one permeable or screen-like printing form, which is stenciled in accordance with the desired printing image or pattern, a squeegee stroking over the printing form for pressing color through the printing form on a printed material, for example printing material or paper web, and an actuator for making contact between the printing form and the printing material and for removing the printed material from the printing form.

Screen printing machines from General Research, Inc., Chicago, USA (cf. their brochure "General" and the spare parts list "General Cylinder-Press" from Hermann Wiederholt GmbH, Nuremberg, Germany) are known, which are equipped with a single electric drive unit . The cited functional components are jointly coupled to the single drive unit via cam disks, transmission and / or reduction gears, belt drives, chain drives, toothed racks, pinions and the like, so that they use the two-stroke method to flood the screen with paint of the squeegee unit (first cycle) and for pressing the ink onto the printing material against the actuator by means of the squeegee unit (second cycle) can carry out the necessary synchronized movements. The difficulty arises here of being able to lock the necessary mechanical couplings with the single drive unit, which are structurally very bulky, against external contamination by means of a compact housing. This leads to increased wear, which is present anyway due to the purely mechanically designed coupling and which over time affects the printing, fitting and register accuracy during the printing process. Another disadvantage of the known construction is that the carriage carrying the screen is not moved back and forth below the doctor blade at a constant speed. As a result, the meshes of the screen or the printing form are not evenly filled with ink or emptied therefrom (problem of uneven mesh emptying) what further affects print quality. In addition, the construction for the exclusively mechanical coupling of the functional components can only be adapted to particular requirements with little flexibility and, moreover, is very expensive to use and assemble.

Furthermore, a screen printing machine is known (DE 37 30 409 A1), in which separate, mechanically decoupled, coordinated controllable drives are provided for the movement processes of the individual organs, in particular a holder and a screen holder, which are connected to a CNC control. However, since the individual drives are formed by electric motors in connection with toothed belt drives, the coupling between the drives and the functional components can be realized with a large number of mechanical parts such as toothed wheels or toothed belts, connecting shafts, etc. These construction parts result in a connection or coupling to the drive motor which is only slightly rigid, these disadvantages being caused in particular by play between the toothed belts and toothed wheels in engagement and / or spring elasticities of the construction parts. This affects the accuracy of the movement control and sequences and thus the precision and quality of the printed image.

The object on which the invention is based is therefore to create a completely new type of control and synchronization for the necessary functional components of a screen or screen printing machine, avoiding the disadvantages and problems mentioned above, and the possibility of being structurally compact due to low mechanical wear Housing and shielding, high adaptability to special requirements, substrates, ink viscosities, etc. and in particular characterized by a simplified and reliable construction and assembly structure. To solve this problem, it is proposed according to the invention in a machine with the features mentioned at the outset that at least two of the three functional components are each connected to a separate drive unit which can be coordinated and actuated by a common drive control system in such a way that the aforementioned Relative movements between the Functional components are coordinated or run synchronously. The hitherto fully mechanical coupling and control is thus replaced by an expediently electronically designed "gearbox", namely the control system that controls and controls the drive units. By providing two or more functional components of the screen or screen printing machine each with its own drive unit, which are coordinated, controlled and monitored by the control system, inert masses, lack of rigidity, worn gearwheels or the like of a purely mechanical control and coupling can be achieved with the disadvantages mentioned above.

On the basis of today's microelectronics, the control system can expediently be set up fully electronically with microcomputer systems that work in real time. In particular, one or more programmable logic controllers can be used. In connection with this, the drive units can preferably be implemented electrically, expediently as position-controlled or speed-controlled servomotors, the rotor of which is connected to the functional component to be moved or a part thereof in direct drive technology. For the disclosure of possibilities in this regard, reference is made to the brochure "Direct Drive Technology" from April 1993 and to the patent specification DE 41 38 479 C2 from Baumüller Nürnberg GmbH, 90482 Nuremberg.

According to an expedient embodiment of the invention, a linear motor is used as the electric motor for the functional components to be moved linearly. In a special implementation of this idea, the stator or its primary part and / or the rotor or the secondary part of the linear motor with the linearly to be driven functional component, its linear guide, for example in the form of a rail and / or the machine chassis or in each case with a part of which structurally integrated and / or made in one piece. This could be designed, for example, in such a way that the sieve slide has a linear rotor equipped with permanent magnets, and the machine chassis receiving it as a stator Current coils is interspersed, analogous to a linear synchronous motor. Corresponding is conceivable for flood and squeegees of a screen printing machine.

A hierarchical structure is advantageously formed between the functional components, the respectively assigned drive units and the control system in such a way that the control system forms the master function and the drive units with associated functional components each form the “slaves” to be instructed. The control system can be provided with a memory module designed and programmed in such a way that printing and / or machine status parameters can be read, stored and called up via an interface which is used for communication with an operator, an external computer and / or is designed in a computer network. Corresponding data can thus be transferred to a central computer via a network or can be transferred from the latter.

The screen printing system according to the invention can be easily expanded in a modular manner: in the presence of a transport mechanism for moving printed matter to the actuator and for removing it, a further drive unit can easily be coupled, which can then easily be subordinated to the control commands of the control system or connected to it. After an embodiment of the invention in which the transport mechanism is implemented with an input-side and / or output-side roller around which the printed material can be wound, the transport mechanism drive unit is either connected to both rollers or only one, the each other role is indirectly coupled to the drive unit, for example via gears or toothed or belt drive, or is driven freely by the print material to be transported. Material from the roll (roll printing) can thus also be provided as the printing material.

In the case of a machine with at least three functional components that can be set in motion, it saves effort and cost if, according to a special embodiment of the invention, at least one of the functional components Components are conventionally indirectly and / or exclusively mechanically coupled (indirectly) to the drive unit of another functional unit and / or are indirectly or mechanically synchronized with the other functional unit. The abovementioned mechanical components, such as gears or toothed or belt drives, can serve as a means.

The problem with the two-stroke method from the above-mentioned prior art is that both in the flooding and in the pressure cycle, the screen carriage reverses in each case past the flooding or printing squeegee in principle at the same speed. In contrast, the invention opens up the possibility of a special embodiment in such a way that the control system is designed or programmed (implementation of a specific control module therefor) in such a way that the linear drive required for the screen slide to move past the doctor unit is accomplished by a drive unit, which is controlled by the control system for the forward movement at a different speed than for the backward movement. This achieves the advantage of decoupling the flooding and printing speeds in a screen printing machine.

It is within the scope of the invention to form linear drives on the basis of the drive units controlled by the control system. In particular, it is conceivable to control the linear motors addressed via the control system.

It is particularly advantageous if a functional component, in particular the printing form, is assigned several drive units or linear drives which act or drive in parallel to move them, in order to avoid twisting and mechanical distortions along with the associated loads on this functional component, which can impair the print quality .

Another advantage of the concept according to the invention, namely assigning own drive units to the at least essential functional components and subordinating this to a higher-level control system consists of improved possibilities for human-machine communication: the control panel known per se in screen printing machines for functions such as typing, automatic operation, emergency switch, passage of the paper without printing, etc., can be designed accordingly Connect the interface directly to the control system, which then forwards corresponding control commands to the drive units, which may be arranged as slaves. The control panel can of course be expanded within the scope of the invention, for example by means of information output to people via displays, starting error diagnosis routines, etc.

According to an embodiment of the invention, the control system is provided with a control module designed in this way, in particular programmed, which controls the drive units in such a way that the doctor unit is kept still while the printing form is moved at a constant speed. In this way, at least for the temporal printing window, a constant printing form speed can be achieved in relation to the doctor blade unit, which promotes the uniformity of the color printing and the printed image.

The invention is not restricted to the use of the known screen printing machine with two-stroke method mentioned at the beginning. Rather, it can also be applied to the known roll-off screen printing (cylinder printing) with a fixed squeegee: the printing form which surrounds the fixed squeegee mechanism with a hollow-cylindrical cross section, and the actuator designed as a pressure cylinder are each connected to a separate drive unit which is controlled by the control system. In this way, on the one hand, an exact synchronism of the rotations of the printing form and the printing cylinder can be taken into account. On the other hand, different speeds can also be achieved for the two functional components, which, for example, changes the thickness of the printed matter when it comes to the printing form or the printing cylinder. which is wound can be compensated for by appropriate variation of the respective drive speed by means of the control system.

It is important that the screen accuracy is guaranteed in screen printing, which means that screen fabric and substrate come to lie exactly on top of each other. This can be advantageously accomplished with a special embodiment of the invention, in that the control system sets the printing form and the actuating element at different times in relation to one another with respect to a point in time that is decisive for the start of printing. For example, the guide carriage of a screen printing machine can only be brought into linear motion when the registration of a sheet of paper on the printing cylinder as an actuator has been awaited.

Advantageously, the printing form and / or actuator are movably mounted relative to the machine chassis and / or relative to one another and (each) connected to a drive unit controlled by the control system, and the control system with an interface for inputting or recording a specification for the action, in particular Development length, between printing form and actuator and provided with a control module designed in such a way, in particular programmed, that the drive units respectively assigned to the printing form and the actuator are actuated in the sense of a synchronous or shortened or extended action, in particular handling, of the actuator on the printing form become. For example, the process can be set using the travelable angular path of a printing cylinder. The advantage lies in the possibility of slippage or other asynchrony between the printing form and the printing cylinder.

The invention opens up the further, advantageous training that printing form and

Actuator with a (preferably linear) variable distance from each other, at least one of these functional components with one of the

Control system controlled linear drive is connected. This allows one- on the one hand promote maintainability, for example by creating a large distance between printing form and actuator. On the other hand, the distance between the printing form and the actuator can be adjusted according to the thickness of the material to be printed. All of this can be done intelligently by the preferably electronically implemented control system or a control computer.

Advantageously, the printing form and / or actuator (each) are connected to a drive unit controlled by the control system, and the control system is connected to an interface for inputting or recording a specification corresponding to the format sizes of the printed material and with a design designed in this way. In particular, the programmed control module provides that the drive unit assigned to the printing form and / or the actuator is controlled in the sense of a drive path adapted to the size of the format. For example, in the case of sheet-like printing material (sheet printing), the format sizes can specify the path of the actuator and / or the printing form.

The following, relatively simple design is also within the scope of the invention: the printing form is stretched, for example, as a sieve onto a frame which is articulated on a flat bed as an actuating element and can be pivoted back and forth. The doctor unit is movably supported relative to the frame so that it can be guided over the sieve stretched thereon. Within the meaning of the invention, at least one drive unit, which is controlled by the control system, is assigned to the frame for pivoting it and the squeegee mechanism for its relative movement relative to the frame or the screen. In this case, the software required for the control system can be created particularly easily and reliably.

It is known per se to provide screen printing machines with systems and means for generating a vacuum. For example, the printing cylinder can be perforated in order to fix the paper to be printed on the outer surface of the printing cylinder by means of a vacuum generated by vacuum, and when the vacuum is removed. to release this fixation. Vacuum generating means are also expedient for the transport mechanism, so that it can usually transport the printed matter precisely in the form of paper to the actuator or to the printing form. In this regard, a special embodiment of the invention consists in the fact that the control system is provided with a control interface to the vacuum generating means, and furthermore has a control module designed in this way, in particular programmed and coupled to the interface, so that depending on the machine ¬ nenstellung or position of one or more of the drive units, the means for vacuum generation are activated. The advantage achieved is that the fixing of the printed matter, for example paper, can be flexibly, precisely and reliably adapted or integrated into the movement sequences of the functional components generated by the drive units in connection with the control system.

The control system is advantageously provided with a control module designed and programmed in such a way that the drive unit assigned to the doctor unit presses the doctor unit against the printing form, preferably in a force and / or position-controlled manner. Thus, the drive unit of the doctor blade unit constantly exerts a force or a torque during the printing process, which is equivalent to a spring action (“electrical spring”) with which the doctor blade unit is pressed against the printing form.

Further details, features and advantages on the basis of the invention result from the subclaims and from the following description of preferred exemplary embodiments of the invention in connection with the drawings. These show in:

1 is a screen printing machine according to the invention in a simplified perspective view,

2 is a block diagram of the control of the machine of FIG. 1, 3 shows a function / time diagram of the screen printing machine according to FIGS. 1 and 2,

4 is a block diagram for a modified screen printing machine control,

Fig. 5 is a block diagram for a further modified screen printing machine control, and

6 a section of part of the screen printing machine according to the invention with a modified linear drive for the screen carriage in a perspective corresponding to FIG. 1.

1, a stack of paper 2 to be printed is placed on a paper feeder 1. The paper feeder 1 is provided with an electric motor M4. At its shaft end 3, a belt or chain wheel 4 is fastened, with which a drive belt or a drive chain 5 is engaged. This drives a connecting wheel 6, to the axle 7 of which the drive wheel 8 of a paper system conveyor belt 9 for paper 2 is coupled, as indicated in a schematic manner. As indicated by dashed lines, the paper system conveyor belt 9 guides paper 2 within the reach of a printing cylinder 10. Paper 2 is moved out of the sphere of action of the printing cylinder 10 by means of a paper delivery conveyor belt 11 after the paper has been finished or printed. Paper feeder 1 with (not shown) gripping means for the stack of paper 2, paper system conveyor belt 9 and paper delivery conveyor belt 11 are each coupled together for their drive to the electric motor 4 by means of mechanical coupling elements known per se, such as the chain or belt drive 4 , 5, 6. The pressure cylinder 10 is provided with a drive shaft 12, on which another electric motor M1 acts directly in direct drive connection. Above the printing cylinder 10, a screen 13 is clamped in a screen slide 14, which is mounted inside the machine chassis 15 for executing linear reversing movements 16. Two linear drives 171, 172, which are arranged on one of the long sides of the machine chassis 15, act simultaneously on the screen slide 14 in a functional parallel circuit. The linear drives 171, 172 for the screen slide 14 each consist of an electric motor M21 or M22 supported against the machine chassis 15 and a spindle 181 or 182 fastened directly and rigidly to the rotor thereof. With the external thread of the spindle 181 or 182 meshes the internal thread of a drive shoulder 19 of the screen slide 14 (the second drive shoulder is not visible in the drawing). If the spindle 181 or 182 is set in rotation by the respective electric motor M21 or M22, this is converted into the linear reversing movement 16 (back and forth) depending on the control of the electric motors. For the precision of the reversing movement 16, two linear longitudinal guides 201 and 202 are provided, which run parallel to each other on one longitudinal side of the machine chassis 15, and with which the screen slide is in engagement.

A doctor unit is located above the screen 13 approximately in the middle on the machine chassis

21 arranged, the linear, rising and falling vertical reversing movements

22 can be issued by means of two linear drives 231, 232. These two linear drives 231, 232 are constructed analogously to the linear drives for the screen slide 14 with electric motors M31, M32 and spindles 241, 242 on both sides. With the spindle 241, 242, which can be rotated by the electric motor M31, M32, there is a drive sleeve 251 arranged on both sides of the chassis 15, 252 engages, via which the spindle rotary movements are converted into the vertical reversing movements 22 for the doctor unit 21. From the doctor unit 21, only the printing doctor 26 is visible in the perspective view. In order to be able to bring about certain machine positions or states manually, a handwheel 27 with a crank 28 is rotatably mounted on the outside of the machine chassis 15.

2, a rotary position transmitter 29 is actuated with the handwheel 27, the output of which is sensed by a pulse shaper 30 and passed on to a higher-level control system 31 in the form of digitally processable, in particular countable pulses. This includes a counting module CNT, by means of which the position of the handwheel 27 can be detected and converted into corresponding control commands.

According to FIG. 2, the actual positions of the electric motors M1, M21, M22, M31, M32 and M4 for the printing cylinder, the screen carriage with printing form, the doctor blade mechanism and the transport mechanism (paper feeder and delivery arm with gripping device) each have their own Rotary position sensor 29 detected. Their respective output signals corresponding to the actual position of the electric drive are fed to respective drive controllers 32, which communicate with a common bus system 33, which is dominated or controlled by the control system or control computer 31, in order to generate a setpoint value to be compared with the actual value . The pulse shaping stage 30 responsible for the handwheel 27 with the associated position transmitter 29 can also be connected to this bus system. The main modules setpoint generation SWG and programmable logic controller PLC are implemented or created in the master computer 31. The main module setpoint generation SWG can comprise as a submodule a (fine) interpolation IPL and / or a pulse count CNT assigned to the pulse shaper 30. A communication via a serial interface RS 232 or with a parallel interface 35 for digital inputs and outputs can be established for the master computer via a second bus system 34. The digital inputs can be selected using the BY- PASS FEEDPORT ON / OFF, FEEDER VAC ON / OFF, DELIVERY VAC ON / OFF, CYLINDER VAC ON / OFF, SQUEEGE RAISE NON PRINT / HI LIFT, MACHINE RUN / JOG, SPEED (stepless) , PASSER ON / OFF and with the MACHINE buttons START / STOP, MACHINE EMERGENCY STOP, DRYER ON / OFF / TWO, SQUEEGE UP / STOP / DOWN connected to a control panel known per se for screen printing machines. The digital outputs of the parallel interface 35 can be used, for example, to control vacuum generating means (see above), in particular the vacuum pump. The block MMK (man-machine communication with graphic screens, monitors, control panels, etc.) is used to guide, evaluate and program the control computer 31. For example, the programmable logic controller PLC can be programmed via this block MMK.

The software that is to be implemented in the master computer 31 results from the following description of the function / time diagram in FIG. 3: over time t there are the profiles of the rotation vectors w for the screen slide electric motors M21, M22 , the printing cylinder electric motor M1, the doctor blade electric motors M31, M32 and the paper transport electric motor M4 are applied correctly. In position 0 the drive motor M4 is currently active for paper transport. The transport mechanism provided for this purpose expediently comprises the following assemblies: sheet feeder, paper feed table with drawing mark, delivery table, belt drive to the sheet distributor and dryer. The speed of the drive M4 must be matched to the feeding of one sheet per printing cycle. Queries in the paper feeder 1 and in the paper delivery 11 can be used to act with corresponding control signals on the doctor blade drive M31, M32 and the cylinder drive M1 or to bring the entire machine to a standstill at the end of printing. In position 1, which corresponds, for example, to a movement of the screen carriage by 5 mm compared to the starting position, the master computer 31 ensures that the electric motors M31, M32 are activated for the doctor unit. In position 2 (sieve slide position 70 mm) the paper gripping is finished and the free movement for the squeegee unit is reached. At the same time, the electric drive M1 for the printing cylinder 10 has reached its full rotational speed. The same applies to the screen slide drive M21, M22. In position 3 (screen slide position approx. 87 mm), the squeegee unit (printing unit) 21 has reached its printing position, that is to say it has run down sufficiently. In the version with flood and pressure doctor blade, the pressure doctor blade 26 is brought into contact with the screen. The lowering of the printing squeegee thus takes place between the starting point of the printing cylinder 10 (position 0) and the beginning of the printing window (position 3). Using suitable software, the master computer 31 can control the doctor blade parallel drive M31, M32 in such a way that a specified contact force of the doctor blade 26 on the screen 13 takes place.

In position 4 (screen slide position approx. 788 mm), the master computer controls the doctor mechanism drive M31, M32 to lift the squeegee 26 off the screen 13. The control commands for moving the squeegee or printing unit drive M31, M32 are therefore always outside the printing window. At the same time, the feed speed of the screen slide drive M21, M22 is braked in position 4. Preferably, the master computer should always generate the acceleration and braking ramps for the screen slide 14 outside the printing window between position 3 and position 4 (unlike according to FIG. 3), so that during the printing process the movement sequence is completely linear or the feed rate of the screen carriage 14 is constant.

In position 5 (screen slide position approx. 807 mm) the squeegee has reached its non-printing position or flood position. At the same time, the screen carriage 14 has reached its dead or reversal point in the host computer 31 according to the drive software. The control computer 31 also stops the electric motor M1 of the printing cylinder. The previous braking or the braking ramp of the pressure cylinder electric motor M1 must be exactly synchronous with the braking ramp of the screen slide drive M21, M22. Between position 5 and position 6 (screen slide position 614 mm only from the starting or zero point), the electric motor M1 is given the control command to give the printing cylinder 10 a remaining rotary movement until it has a complete 360 ° from position 1 Movement or at least has reached the paper loading position and the start of printing. At the same time, the return of the screen or printing form slide 14 is brought to maximum constant speed, wherein the screen 13 can be flooded with ink at the same time by a flood knife. Furthermore, the gripping means for the paper transport mechanism can be activated in position 6. This must be done at the latest in position 7 (sieve slide position 32 mm). In position 8 (carriage position 2 mm) the gripping means for the paper close, and in the starting position 0 (carriage position 0 mm) the paper to be printed is picked up and a new printing cycle can begin. Before the screen carriage reaches the start position 0 again, the sheet is expediently aligned with the stationary printing cylinder 10 (stop cylinder operation).

Alternatively, the cylinder can be reversed between position 5 and position 8/0, ie moved back (reversing cylinder operation). The corresponding rotation vector is indicated by dashed lines in FIG. 3. Then, however, only the time between positions 7 and 8 remains for the application of the paper sheet to the cylinder, which is disadvantageously short.

In addition to the movement sequences mentioned, modules can also be implemented in the master computer, with which a NON-PRINT position and a HL LIFT position can be realized for the doctor unit 21. The NON-PRINT position can be useful for eliminating paper transport problems or simply when you are not printing. The HL LIFT position is required to change or clean the printing form or screen 13.

4 shows a control configuration, in which only the printing form is provided with the electric drive M2 and a doctor blade with the electric drive M3. The printing cylinder as an actuator can be mechanically coupled and synchronized with the printing form (not shown). To increase the accuracy, a rotary position sensor 29 is used, which scans the position of the printing form or the associated electric drive M2 and into one Drive controller 32 returns. The returned signal can also be picked up and used by the drive controller 32, which is assigned to the doctor blade electric drive M3. It can also be seen from FIG. 4 that three or more drive controllers 32 can be connected to one another in a chain connection, the superordinate master control 31 needing to forward its control commands to only one of the drive controllers 32; the latter can then optionally forward them to the drive controller 32 intended for reception. The configuration according to FIG. 5 differs from that according to FIG. 4 in that the printing cylinder is assigned its own electric drive M1, the actual position of which is sensed directly or directly by the rotary position sensor 29 and introduced into the controller control chain 32 . This control chain can be expanded modularly.

According to FIG. 6, the linear drive 171 is modified compared to the embodiment according to FIG. 1 in that the electric motor is designed as a linear synchronous motor M23, known per se, with a stator 234 which is supported in a stationary manner on the machine chassis 15 and a rotor 235 which is movable in relation thereto is firmly connected to the drive shoulder 19 of the screen carriage 14. The stator 234 as the stationary primary part of the linear drive system is penetrated by current coils, of which the winding heads 236 are shown schematically in FIG. 6. In the exemplary linear motor, the rotor 235 can be designed as a passive, moving secondary part equipped with permanent magnets (not shown). Instead of the rotary position sensor 29 mentioned in FIG. 2, a linear position sensor (not shown) is to be used, which can be implemented, for example, by means of Hall probes.

Claims

PATENT CLAIMS

1. Machine for screen or screen printing with at least the functional components: permeable or screen-like printing form (13, 14), stenciled in accordance with the desired printing image or pattern, doctor blade mechanism (21) brushing over the printing form (13, 14) Pressing ink through the printing form (13, 14) onto a print item (2), and

Actuating element (10) for making contact between the printing form (13, 14) and the printing material (2) and for removing the printing material (2) from the printing form (13, 14), at least two of these functional components being linearly guided and each with a separate drive unit (M1. M2.M3) are connected, which can be coordinated and actuated by a common drive control system (31) in such a way that the relative movements mentioned between the functional components are coordinated or synchronized, characterized in that one or more functional compos - Elements that are linearly guided are directly connected to their linear drive with the rotor of an associated electric motor (M21, M22; M31, M32).

2. Machine according to claim 1, characterized in that the control system (31) is implemented with a programmable logic controller (PLC).

3. Machine according to claim 1 or 2, characterized in that the one or more functional components are each linearly guided via a spindle (181, 182; 241, 242) which with the rotor of the electric motor (M21, M22 ,; M31, M32) is connected directly and / or in one piece.

4. Machine according to one of the preceding claims, characterized by one or more position and / or speed-controlled (29) An¬ drive units (32, M1 -4), in particular in the form of servomotors that work for example on the basis of three-phase current.

5. Machine according to claim 1 or 2, characterized in that a linear motor (M23) is used as Elek¬ tromotor, the stator (234) loading drawing the primary part or the rotor (235) or the secondary part of the linear motor with the linearly driven functional component (14), its linear guide (19, 201) or the machine chassis (15) or in each case structurally integrated and / or with a part thereof or are made in one piece.

6. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) has a module for setpoint generation (SWG) and / or interpolation (IPL) for the position and / or speed control.

7. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) on the one hand and the drive units (32.M1) on the other hand are connected to each other according to the master / slave principle and work.

8. Machine according to one of the preceding claims, with a displaceable or rotatable handle, in particular in the form of a handwheel (27) for setting a specific machine state and / or a specific machine position, characterized in that the control system

(31) has an interface for recording and a module (CNT) for converting the position of the handle into one or more control signals for one or more drive units (32, M1, M2, M3).

9. Machine according to one of the preceding claims, with the further functional component of a transport mechanism, by means of which the Druck¬ good (2) to the actuator (10) is movable and / or removable therefrom, characterized in that the transport mechanism has its own An¬ drive unit (32.M4) is assigned, which is connected to the control system (31).

10. Machine according to claim 9, wherein the transport mechanism has a gripping device and / or conveying means (9, 11) for feeding and / or guiding the printed matter (2) to and from the actuator (10), characterized in that the transport mechanism -Drive unit (32.M4) either with the

Gripping device or connected to the conveyor (9.1 1), and the respective other transport component to the drive unit (32, M4) indirectly, for example via gear or toothed or belt drive (4,5,6).

11. Machine according to claim 9, wherein the transport mechanism is realized with an input-soap and / or output-side roller around which the printed material

(2) can be wound, characterized in that the transport mechanism drive unit (32.M4) is either connected to both rollers or only one, the other roller being able to be indirectly connected to the drive unit (32, 4), for example via Gear or toothed or belt drive (4, 5, 6), coupled or driven freely by the print material (2) to be transported.

12. Machine according to one of the preceding claims, wherein at least three functional components can be set in motion by machine, characterized in that at least one (10) of the functional components indirectly and / or exclusively mechanically, for example via gears or toothed or Belt drive, coupled to the drive unit (32.M2) of another functional unit (13, 14) and / or synchronized therewith.

13. Machine according to one of the preceding claims, wherein the printing form (13, 14) with a back and forth or reversibly movable sieve carriage (14) for a stenciled sieve (13, 14) stretched on the carriage frame. is realized, characterized in that the screen carriage (14) is provided for its movement with one or more drive units (M21.M22) which are designed as linear drives (171, 172; 231, 232) and on the screen carriage (14) preferably attack on both sides and / or parallel.

14. Machine according to claim 13, characterized in that the control system (31) is provided with such a, in particular programmed control module, that the one or more linear drives (171, 172) each have different drive speeds for the out- and back movements of the screen carriage (14) are controlled.

15. Machine according to claim 13 or 14, wherein the doctor unit (21) synchronously to the screen carriage (14) up and down or back and forth for filling or flooding of the screen (13) and for pressing the ink through the screen (13) onto a printed material (2), characterized in that the doctor unit (21) is provided with one or more drive units (32, M31, M32) which are designed as linear drives (231, 232) and which preferably act on both sides and / or in parallel on the doctor unit (21).

16. Machine according to claim 15, wherein the doctor unit at least two differently guided flood and pressure doctor blades (26) for filling or flooding the screen (13) and for pushing the ink through the screen (13) onto a printed material ( 2), characterized gekennzeich¬ net that either the flood or pressure squeegee (26) is connected to the one or more parallel linear drives (231, 232), and that flood and pressure squeegees (26) mechanically via such a trained Couplings, for example with a belt drive, are connected to one another in such a way that they alternately move towards and away from the printing form (13, 14).

17. Machine according to one of the preceding claims, wherein the doctor blade (21) at least two mutually different flood and

Printing squeegee (26) for filling or flooding the screen (13) and for pushing the ink through the screen (13) onto a printed material (2), characterized in that each squeegee is assigned its own drive unit controlled by the control system.

18. Machine according to one of the preceding claims, wherein the actuator (10) has a cylindrical basic shape, preferably the shape of a printing cylinder, characterized in that the actuator (10) for its rotation with its own, from the control system (31 ) controlled drive unit (32.M1).

19. Machine according to claim 18, characterized in that the control system (31) has such a designed, in particular programmed control module, that the actuator (10) is reversibly bidirectionally and / or unidirectionally moved over a specified angular range.

20. Machine according to one of the preceding claims, with a manually operable control panel, characterized in that the Leitsy¬ system (31) an interface (35) and a module for detecting and implementing the state of the control panel or its controls in or has a plurality of control signals for one or more drive units (M1 -M4).

21. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) has a trained, in particular programmed control module such that the doctor unit (21) via the respective drive units (32, M31, M32; M1) held still and the printing form (13, 14) moved at a constant speed.

22. Machine according to one of claims 1 to 12, wherein the printing form has a hollow cylindrical cross section, by which the doctor blade is surrounded, and the actuator (10) is formed as a printing cylinder for the printed matter (2), characterized in that the Printing cylinders (10) and the printing form for their rotation are each connected to a drive unit (32.M1 -M4) controlled by the control system (31).

23. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) is provided with such a trained, in particular programmed control module that with respect to ei¬ nes the relevant time for the start of printing (item 2, item. 3) the drive units (32, M21, M22, M1) assigned to the printing form (13, 14) and the actuator (10) are actuated at different times.

24. Machine according to one of the preceding claims, characterized in that the printing form (13, 14) and actuator (10) with changeable

Are spaced from each other, and at least one of these functional components is connected to a drive unit (32.M1 -M4) controlled by the control system (31), which is preferably designed as a linear drive (231).

25. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the printing form (13, 14) and / or actuator (10) movably gela- device and (each) are connected to a drive unit (32, M21, M22, M1) controlled by the control system (31), the control system (31) is an interface for detecting and / or implementing the type and nature, for example thickness, of the Printed material (2) and a control module designed and programmed in such a way and coupled to the interface that the position and / or speed of the (respective) drive unit (32, M21, M22, M1) depends on the printed material (2 ) is adjustable.

26. Machine according to one of claims 1 to 12, wherein the printing form is stretched on a frame, which is mounted to pivot to the actuating element designed as a flat bed, and the squeegee mechanism (21) is movably mounted relative to the frame , characterized in that at least the frame for its pivoting and the squeegee mechanism for its relative movement relative to the frame each have a

Control system (31) controlled drive unit (32.M1-M4) is assigned.

27. Machine according to one of the preceding claims, wherein at least the actuator (10) is provided with means for vacuum generation, characterized in that the control system (31) has an interface (35) to

Activation of the means for vacuum generation and a control module designed in this way, in particular programmed and coupled to the interface (35), that depending on the machine position or position (29) of one or more of the drive units (32.M1 -M4) the means for Vacuum generation can be operated.

28. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the printing form (13, 14) and / or actuator (10) relative to the machine chassis (15) and / or mutually movable and (each) with one of the control system (31 ) controlled drive unit

(32, M1; M21, M22) are connected, and the control system (31) with an interface (RS 232, 35) for input or for recording a specification for the action, in particular the processing length, between the printing form (13, 14) and Actuator (10) and with such a trained, in particular whose programmed control module is provided such that the drive units (32, M21, M22, M1) assigned to the printing form (13, 14) and the actuator (10) in the sense of a synchronous or shortened or extended action, in particular handling, of the actuator (10) on the printing form (13, 14).

29. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the printing form (13, 14) and / or actuator (10) (each) with a control unit (31) controlled drive unit (32, M1; M21, M22) ver - are bound, and the control system (31) is provided with an interface (RS 232, 35) for input or for recording a specification according to the format sizes of the printed matter (2) and with a control module designed in this way, in particular programmed, that the drive unit (32, M21, M22, M1) assigned to the printing form (13, 14) and / or the actuator (10) in the sense of an adapted to the format sizes

Drive path is controlled.

30. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) is provided with a trained, in particular programmed control module such that the Rak¬ mechanism (21) associated drive unit (32.M31.M32 ) the squeegee (21) presses preferably force and / or position controlled against the printing form (13, 14).

31. Machine according to one of the preceding claims, characterized gekenn¬ characterized in that the control system (31) is provided with such a trained, in particular programmed memory module that reads and / or machine state parameters therein, memory and via an interface (MMK) can be called up, which is designed for communication with an operator, an external computer and / or in a computer network.