EP0653302B1 - Speed adjusting device for form rollers in a rotary offset printing press - Google Patents

Description

The invention relates to a method for controlling the sequence of a driven Ink application roller according to the preamble of claim 1 and a device to carry out the method according to the preamble of the independent claim 3rd

From DE-OS 38 25 517 a printing unit with an ink roller delivery is known, where in the course of the operation or due to external interventions Changes in the diameter of the inking roller are compensated for by the fact that the inking roller mounted in two roller locks automatically against the forme cylinder delivered or is turned off by this, the contact pressure as a function of Center distances of the two rollers and so the width of the order strip, i.e. the strip, where the roller and cylinder touch, kept constant become. The in and out movement is regulated doing so with the help of a calculator that depends on the distance corresponding to the roller axis from the cylinder axis There are control impulses on adjusting spindles. That with this printing unit Potentiometers serving as actuators can also to be replaced by a pressure cell that has a measured value for delivers the contact pressure of the inking roller to the forme cylinder. In this way, changes in diameter of the inking roller be compensated for, for example arise that the roller in operation due to the flexing work between their compliant covering and the printing form warmed, or by the fact that the roller for leveling the surface was ground a little thinner. However, this arrangement cannot compensate for the different peripheral speed between inking roller and forme cylinders caused by changes in the applicator roller diameter is required as long as the inking roller and Forme cylinders, as is common, from a common one Drive driven with a fixed gear ratio become. Due to this lack of compensation of the peripheral speeds is not just an additional warming and thus also an additional enlargement of the roller diameter causes, but also an increased wear of the roller surface, because of this because of the different speeds with increased slip or sliding on the forme cylinder running.

Furthermore, from German utility model 92 15 906.0 Inking unit known, in which the inking roller on two Swivel levers is mounted with one end to one Forme cylinder axis parallel axis fixed to the frame swiveling are carrying the applicator roller in the middle between them and supported at the other end against adjustable stops are. Compliant press assemblies push the other ends the two levers against the adjustable stops. In order to prevent the order strip width, i.e. the Width of the strip on which the roller contacts the cylinder, depending on changes in diameter due to heating changes, the temperature of the roller surface measured and the mentioned adjustable stops are with With the help of control signals determined by a computer in the Adjusted to keep the strip width constant. The Problem of different peripheral speeds also not taken into account in the inking unit according to this utility model.

European patent application 406 737 proposes to Reduction due to constant roll diameter the necessary slip between the surface contact Roller and cylinder the outer diameter of the elastic Circumferential layer of the inking roller at the same speed of Roller and cylinder to 99% of the diameter of the same size Reduce forme cylinders. Because all parameters are constant remain, an adjustment of the peripheral speed of the Applicator roller to different diameters of the latter not reached.

A generic method and a generic printing unit are from DE-OS 32 39 114 A1 known.

US Pat. No. 4,428,288, for example, shows a flexographic printing press with a control method disclosed. In this device, which has become known, a tachometer measures the speed of a plate cylinder and generates a variable control signal Speed control of an ink roller which is in operative connection Motors. This is intended to connect the surface wear to one another in direct Active cylinders, the peripheral speed between the plate cylinder resp. its extreme extent and the ink transfer roller balanced become.

The object of the present invention is now a control method and To create inking system, through which it is possible with changing diameters of the Inking roller e.g. due to heating or wear, the one deviating from the setpoint Speed of the inking roller and preferably also changes in the width of the application strip between the ink application roller, which has a resilient surface and automatically compensate for the forme cylinder.

The invention solves the problem, a control method and a To create inking system, through which it is possible, with yourself changing diameter of the inking roller e.g. due to warming or wear the speed deviating from the setpoint the inking roller and preferably also changes the application strip width between the one soft elastic Surface coating ink roller and the form cylinder to compensate automatically.

The deviations in the peripheral speed to be compensated here the applicator roller opposite the forme cylinder small, but play for wear and color application a role. The adjustment paths are also required are to change the position of the roller axis Constant pressure of the application roller against the printing form hold not big.

Regarding the regulation of the peripheral speed of the Applicator roller should also be noted that this peripheral speed not always exactly the same as the peripheral speed of the forme cylinder, because often due to the non-zero order strip width between Application roller and forme cylinder slip due to unavoidable a slight change in the peripheral speed of the Application roller can be reduced compared to that of the forme cylinder can. The setpoint for the peripheral speed of the The application roller is therefore not necessarily equal to the actual value the circumferential speed of the forme cylinder. He will be on simplest determined empirically.

According to the invention, this object is achieved by means of the characteristic combinations of features of independent claims 1 and 3.

If here from the peripheral speed of the forme cylinder is spoken, so of course is the peripheral speed the surface of the printing form on the form cylinder meant.

If the printing unit runs at a constant speed, the circumferential speed of the forme cylinder as a constant in be entered into the calculator. However, this is not the case for example due to fluctuations in the mains voltage, the circumferential speed of the forme cylinder becomes expedient or the speed proportional to this as electrical Signal introduced into the calculator.

The invention thus allows the peripheral speed of the Applicator roller, usually at the start of print production is selected, constant throughout the print production hold regardless of the running time initially rising surface temperature of the application roller.

The peripheral speed of the inking roller can be according to of the invention by detecting the speed the roller and the diameter thereof are detected. Of the The diameter of the same is appropriately dependent from the adjustment position of the application roller in relation to the Printing cylinder determined.

The regulation of the speed of the inking roller does not have to linear function of their diameter. The relationship can also be used here as a non-linear function in the Calculator can be entered.

The speed of the inking roller can also be used as Function of the shore hardness of the coating of the inking roller be managed. The harder the surface, the lower it gets the pressure strip between the roller and cylinder and all the less can also be a possibly advantageous minor Reduction of the peripheral speed of the application roller compared to that of the impression cylinder.

In the preferred embodiment according to claim 3 Invention in which the applicator roller, as known, on two pivot levers is mounted, and by pivoting the same can be used against the impression cylinder measured the contact pressure according to the characterizing part of claim 3, with which the application roller is pressed against the forme cylinder becomes.

If this embodiment is also preferred, the Regulation of the order strip width in connection with the Regulation of the peripheral speed of the applicator roller too then take place when the roller on two carriages in the machine frame is slidably mounted, as in the German Patent 38 25 517 is described in detail.

Is the printing unit not only with a regulation of the roller circumferential speed, but also with a scheme of Equipped roll adjustment, so this has the essential The advantage that inking rollers with different Shore hardness of the roll surface or with different Roll diameters can be used, such as those by sanding dirty or expired Application roller surfaces are created.

The contact pressure or the dependent application strip width and the peripheral speed of the inking roller are of course regulated so that neither an uncontrolled Ink transfer still an undesirable Abrasion between printing form surface and application roller surface takes place.

In physical terms, the invention forms the printing unit according to the preamble of claim 3 as it from the German patent 38 25 517 or the utility model 9 215 906 is described, according to the license plate this claim further. It is sufficient that the drive the inking roller is only infinitely variable is because the expected changes in diameter this roller, measured by this, are small.

To drive the inking roller independently of the drive to be able to regulate the plate cylinder can according to a first preferred embodiment of the invention, the inking roller by a separate motor with a computer-controlled one controllable speed can be provided. Such Training becomes particularly easy because of a mechanical control gear not applicable. However, it differs more from the conventional Embodiment from which the plate cylinder and the application roller through gear drives in drive connection stand.

According to another preferred embodiment form of the invention, where the plate cylinder and the inking roller are driven by a common drive in the drive train to the inking roller in front of this one from Computer-controlled continuously variable transmission arranged.

Regulating gear of the type in question here can be power or be form-fitting; albeit non-positive gearbox are easy to control, so you become a positive locking gear prefer because it is subject to less wear.

The control gear can be a differential gear e.g. in shape of a planetary gear. The differential gear can but also be an internal gear transmission, in which a internally toothed ring gear meshes with a pinion, whereby the pitch circles of pinion and ring gear a very small Should have a difference. One leaves in such a transmission go around the point of intervention at a very low speed, this allows the desired slight change in Easily reach the peripheral speed of the applicator roller. The Internal gear transmission can in particular be a so-called "harmonic drive transmission" be.

The correct shaft of the differential gear, so one Internal gearbox the shaft that the point of engagement of the can rotate two gears, is advantageous here an auxiliary motor, the speed of which is driven by the computer is controlled.

Basically, instead of a differential gear another variable speed transmission with continuously variable control is used become. Since the peripheral speed to be regulated, however be regulated very precisely and only in a small area must, here is a differential gear as special advantageous.

The formation of the printing unit is particularly advantageous viewed according to claim 11. In principle, here the swivel levers represent bars that have the applicator roller axis in their center wear, at one end on the resilient pressing device and at the other end on the storage in the machine frame are stored. If you measure the bearing force in the Machine frame by means of a force measuring arrangement, so is the Measured value directly proportional to the contact pressure of the application roller against the printing form. The forme cylinder is also advantageous here stored stationary in the printing unit. The one from the load cell Contact forces recorded continuously are included as actual values Computer supplied with setpoint values for comparison. Deviating actual values generate in the computer to adjust the respective swivel lever a signal that via suitable connecting lines a DC or AC motor of the Adjustment stop is supplied. By adjusting the Adjustment stop is the swivel lever with the one stored in it Ink roller around the swivel lever axis of or pivoted to the adjacent forme cylinder. The contact pressure of the Ink roller on the plate cylinder can be done via the central computer be preset on the printing press, or through the control center and / or a suitable service device to be influenced.

As stated, the load cell can be arranged in the frame be so that they the bearing pressure of the swivel lever in their frame-fixed storage measures; the load cell can also For example, sit in the swivel lever and the bearing pressure Measure the shaft of the inking roller.

Instead of load cells, load cells or other suitable dynamometers for recording the bearing force and thus indirectly the contact pressure of the applicator roller against the Forme cylinders are used.

Further advantageous embodiments of the invention are in characterized the further claims 14 to 18.

To determine the speed correction quantity for the Ink roller can change the peripheral speeds of the Ink roller and the forme cylinder with one each Tachometer recorded and a computer via connecting lines be fed. Can also from the distance of the axis Ink roller to the unwind point with the forme cylinder and Speed difference between the forme cylinder and the inking roller Speed compensation in the form of a control signal be formed as the target value via a connecting line to the control device for the auxiliary motor or the Regulating gear of the inking roller is delivered.

The target actual value speed control of the inking roller can also be carried out on site in a separate control loop become.

A further advantageous embodiment of the invention exists in that that of the inking roller or the control gear assigned auxiliary drive motor one, via the central computer Specified, parallel to the main drive or changed Run-up curve to adjust the peripheral speed the inking roller over the corresponding connecting lines can be assigned.

All of these embodiments also allow an application especially for single or multi-page printing machines, where the contact pressure between the inking roller and the associated form cylinders directly from the number of for the depending on the respective print production is.

If necessary, that of the inking roller or the bottom or. Auxiliary drive motor assigned to the transmission can be used independently of the main drive, so that for example a washing process or a pre-inking of the inking roller can be made.

To avoid additional heating of the inking roller when swiveling the inking roller from the forme cylinder against the squeegee and the ink fountain roller (not shown) is the ink metering squeegee advantageous on working cylinders, on the swivel squeegee or the inking roller have a constant pressure, articulated. Here is understood that the ink fountain roller stored in the ink fountain or the ink fountain as a whole can be moved with known means is arranged.

Below are embodiments of the invention Device described in more detail with reference to the drawings.

Fig. 1

einen Ausschnitt einer Seitenansicht eines schematisch darstellten Farbwerkes einer Rotationsdruckmaschine mit einer erfindungsgemäßen regelbaren Farbwalzenan- und -abstellung;

Fig. 2

das schematische Daten- und Kraftflußbild der erfindungsgemäßen regelbaren Farbwalzenverstellung aus Sicht "A" gem. Fig. 3;

Fig. 3

die schematische Draufsicht auf Fig. 1 und Fig. 2;

Fig. 4

in gleicher Darstellung wie Fig. 1 einen weiteren Farbwalzenantrieb;

Fig. 5

das schematische Daten- und Kraftflußbild mit dem weiteren Farbwalzenantrieb aus Sicht "A" gem. Fig. 6; und

Fig. 6

die schematishe Draufsicht auf Fig. 4 und Fig. 6.

The essential components or elements of the device, which are necessary to adjust the contact pressure of the inking roller on the forme cylinder, are each duplicated, but only shown or described. Show it:

Fig. 1

a detail of a side view of a schematically illustrated inking unit of a rotary printing press with an adjustable inking roller adjustment and shutdown according to the invention;

Fig. 2

the schematic data and power flow diagram of the adjustable ink roller adjustment according to the invention from view "A" acc. Fig. 3;

Fig. 3

the schematic plan view of Fig. 1 and Fig. 2;

Fig. 4

in the same representation as Figure 1, another ink roller drive.

Fig. 5

the schematic data and power flow diagram with the further ink roller drive from view "A" acc. Fig. 6; and

Fig. 6

the schematic plan view of Fig. 4 and Fig. 6th

The detail shown schematically in Fig. 1 from the side a printing unit of an offset rotary printing machine has a blanket cylinder 14, on which a Printing forme cylinder 2 is employed. This Forme cylinder 2 is a known dampening system (not shown) assigned which dampening solution to the printing form transmits. Next to the blanket cylinder 14 is an impression cylinder 42 - partially shown - employed. The too printing substrate 41 is between blanket cylinder 14 and counter pressure cylinder 42 passed through and printed.

In contact with the forme cylinder 2 is also an inking roller 1, which is a soft elastic Surface. On this inking roller 1 with an ink fountain roller (not shown) one over the whole Width of the inking roller 1 having a constant dimension, predosed color film 43 applied, the thickness of is many times larger than that of the forme cylinder 2 transferring color film.

The one applied by the ink fountain roller to the inking roller 1 pre-dosed color film 43 with an immediate subordinate squeegee 24 to a predetermined color thickness stripped and on the rolling on the inking roller and transfer the form cylinder 2 carrying the printing form. The swivel doctor blade 24 is used for fine metering of the ink film 43 for example by a known swivel squeegee drive the surface of the inking roller 1 by an angle swung. At the same time it will Swing squeegee by means of working cylinder 26 with constant pressure pressed against the outer surface of the inking roller 1.

The inking roller 1 is rotatable in a pivot lever 12 stored. The pivot lever 12 is around one of the inking roller 1 parallel axis rotatable on the frame of the printing press stored. At the pivot point of the pivot lever 12 is for inclusion the contact pressure between the forme cylinder 2 and the inking roller 1 a load cell 20 is arranged, which from Swivel lever measures the force transmitted to the frame. On the opposite free end of the pivot lever 12 is a hydraulic working cylinder 23 articulated which the pivot lever 12 presses so strongly against an adjustment stop that it is always against the adjustment stop.

The adjustment stop 22 of the stationary on the machine frame attached, has an electrically adjustable spindle 22a on, the location of the contact pressure of the inking roller 1 against limited the forme cylinder.

The one that determines the width of the application strip, due to the contact pressure caused flattening of the inking roller 1 in the rolling area with the forme cylinder 2 is changing Diameter of the inking roller 1 by adjusting the Swivel lever 12 kept constant. This is the contact pressure measured indirectly via the load cell 20 and via the connecting line 21 fed to the computer 19. This compares the actual values with those stored in the computer 19 Target values and gives a converted control signal accordingly via the connecting line 30 the adjustable adjustment stop 22, which by rotating the threaded spindle 22a Swivel lever 12 adjusted accordingly. So the order strip width 45 kept constant.

Other control signals to influence the contact pressure can also from the central computer 36, the control center 35 and / or one Service and test device 37 via the connecting lines 38, 39, 40 are given to the adjustment stop.

Fig. 2 shows the data flow and the power flow for speed control the inking roller 1 according to the illustration in Fig. 1. The driven by the blanket cylinder 14 Forme cylinder 2 and the under or transmission gear 5 or intermediate gear pair 4 driven inking roller 1 point, arranged coaxially on their axis of rotation, each a tachometer generator 17, 18 for recording their actual speeds on a computer via connecting lines 27, 28 be fed. The arranged in the pivot point of the pivot lever 12 Load cell 20 detects a resultant actual contact pressure component between the forme cylinder 2 and the Ink roller 1. This value is via a connecting line 21 fed to the computer 19. To record the actual value the speed of the adjusting shaft 6 of the differential gear 5, the auxiliary motor 8 is also a tachometer generator 16 assigned, the measured values via the connecting line 21 are fed to the computer 19.

From the adjustment path of the calibrated spindle 22a of the adjustment stop 22 and the leverage between the pivot point of the lever 12 to the axis of rotation of the inking roller 1 or the distance between the spindle axis of the spindle 22a is calculated by the computer 19 calculates the new adjustment position of the inking roller 1. The distance of the axis of rotation of the new adjustment position Ink application roller 1 to the unwind point with the forme cylinder 2 results in the new effective radius or extent of the inking roller 1. From the actual speeds of the stored in the computer 19 Ink roller 1 and the forme cylinder 2 and the new one Adjustment position of the inking roller 1 is calculated New speed compensation factor to maintain the target value the peripheral speed of the inking roller 1, the as a control signal to the auxiliary motor 8 via the connecting line 29 or control loop 44 is forwarded.

The auxiliary drive motor 8 is to achieve a better one Control dynamics of the inking roller 1, to maintain the target peripheral speed a separate control loop 44 is assigned.

The speed of the auxiliary motor 8 can via the central computer 36 and / or the control center 35 or a third-party device as a service device 37 via the connecting line 38, 39, 40 through a Operator target value can also be set.

Fig. 3 shows schematically the mechanical drive of the inking roller 1. On the shaft journal 17 of the forme cylinder 2, which is rotatably mounted in the wall 11 of the printing unit, is a gear 3 rotatably attached, the main drive of the Printing machine via the gear 13 of the blanket cylinder 14 is driven at the same speed. The gear 3 meshes with the gear 5.1 on the drive side of an adjustable Differential gear 5. That on the output side Gear wheel rotating with slightly adjustable speed 5.2 of the differential gear 5 meshes with a wheel of the intermediate gear pair 4. The intermediate gear pair 4 is rotatable coaxially on the axis 20 provided with a transducer The pivot lever 12 is mounted and meshed with the gear 10 non-rotatably placed on the pin of the inking roller 1 is.

The location of the sensor 20 and / or the Gear pair 4 can also be different.

To adjust the speed of the inking roller 1 the drive gear 5.2 rotates with respect to the drive gear 5.1 accelerates or decelerates. That is what the regulated does Auxiliary drive motor 8, the adjusting shaft via the gears 7, 9 6 of the transmission 5, e.g. with a planetary gear with driven central wheel and output via Ring gear drives the planet carrier.

Suitable as an advantageous adjustable differential gear a "harmonic drive gear" consisting of a "wave generator" with an elliptical steel disc with a centric one Hub and mounted, elliptically deformable ball bearing, a "Flexspline", formed from a cylindrical, deformable steel sleeve with external teeth and the "Circular spline", a cylindrical ring with internal teeth. The elliptical wave generator deforms as with the adjusting shaft 6 driven part via the ball bearing the Flexpline, which is in the opposite areas the large ellipse axis with the internally toothed, fixed Circular spline is engaged.

To change the speed of the drive wheel 5.2 on the Output side of the "harmonic drive gear", and thus the Ink roller 1, the speed of the wave generator with the adjustable auxiliary motor 8 increased via the adjusting shaft 6 or preferably reduced. The big one shifts Ellipse axis and thus the meshing area. Since the Flexspline has two teeth less than the circular spline, takes place after half a turn of the wave generator a relative movement between Flexspline and Circular Spline around the size of a tooth, and after a whole Rotation around the size of two teeth.

When the circular spline is fixed, the Flexspline turns as Drive element opposite to the drive.

The embodiment shown schematically in FIGS. 4 to 6 shows a section of a printing unit, accordingly the description of Figures 1 to 3, in which the inking roller 1 also to maintain a predetermined Contact pressure on the forme cylinder 2 turned on and off can be, but with a direct, electrical adjustable rotary drive for the inking roller 1 an auxiliary drive motor 15 in the side wall 11 of the printing unit attached and coaxial with the axis of rotation of the inking roller 1 rotatably connected (Fig. 6). Depending on the size, between the auxiliary drive motor 15 and the shaft journal of Ink application roller 1 a transmission gear (not shown) be interposed. This adjustable direct drive is absolutely independent of the main drive of the printing unit. The inking roller 1 is regulated as described to Fig. 2.

The data flow shown in FIG. 5 also takes place as for Fig. 2 described.

Claims (18)

1. A method for controlling the operation of a driven inking roller (1) in relation to a driven forme cylinder (2), wherein the roller has an elastic surface operating in the positioning region against the forme cylinder with an effective radius and a contact force, the rotational speed of the roller (1) and of the forme cylinder (2) are detected and a required change of the rotational speed of the roller is ascertained and the rotational speed of the roller thereupon adjusted, characterised in that

   a) a resilient contact pressure means (23) presses the roller (1) against adjusting stops (22) which are adjustable by motor and movable into an adjusting position to limit the positioning movement,

   b) an actual value of the contact force of the roller (1) against the forme cylinder (2) is measured and supplied to a computer (19) which

   c) compares this actual value with a desired value for the contact force, ascertains the required change of the contact force and controls adjustment of the adjusting stops (22),

   d) the computer ascertains with the adjusting position of the adjusting stops the effective radius of the roller and from the effective radius of the roller and the rotational speed of the roller ascertains the circumferential speed thereof, and from this produces a correction signal to obtain the desired value of the circumferential speed, and

   e) this correction signal is passed to an actuating arrangement to regulate the rotational speed of the roller in relation to the rotational speed of the forme cylinder.
2. A method according to claim 1, characterised in that the rotational speed of the inking roller is additionally adjusted as a function of the Shore hardness of the coating of the inking roller.
3. A printing unit for an offset rotary printing machine for implementing the method according to claim 1, comprising

   at least one inking roller (1) having an elastic surface,

   a forme cylinder (2) designed to hold at least one printing forme,

   a drive arrangement (8, 15) for the roller and the forme cylinder,

   a movable mounting for the roller for positioning the same against the forme cylinder,

   an arrangement (16; 17; 18) for detecting the rotational speed of the roller and the forme cylinder,

   a means connected to the arrangement for detecting the rotational speed for producing a correction signal for the rotational speed of the roller, and

   an actuating arrangement (8; 15) controlled by the correction signal for changing the rotational speed of the roller, characterised by

   a) a resilient contact pressure means (23) which presses the roller (1) against adjusting stops (22) which are adjustable by motor and movable into an adjusting position to limit the positioning movement of the roller,

   b) a contact pressure measuring device (20) with which an actual value of the contact force of the roller against the forme cylinder is measured,

   c) a computer (19) which is connected to the contact pressure measuring device (20) and the means (20, 30) for adjusting the adjusting stops, wherein

   d) the computer is designed so that

   the actual value of the contact force is compared with a desired value for the contact force, a required change of the contact force is ascertained and from this an actuating signal to control the adjusting position of the adjusting stops (22) is formed, and

   from the adjusting position of the adjusting stops the effective radius of the roller and from the effective radius and the rotational speed of the roller the circumferential speed thereof is ascertained and from this the correction signal for the rotational speed of the roller is determined, and

   e) the actuating arrangement (8; 15, 19, 44) for changing the rotational speed of the roller, which is connected to the computer (19) to regulate the rotational speed of the roller (1) in relation to the rotational speed of the forme cylinder (2).
4. A printing unit according to claim 3, characterised in that a separate motor (15), independent of the drive of the forme cylinder (2), with an adjustable rotational speed controlled by the computer (19) is provided as the drive of the inking roller (1).
5. A printing unit according to claim 3, in which the forme cylinder (2) and the inking roller (1) are driven by a common drive, characterised in that a variable speed gear (5) controlled by the computer (19) is located in the drive train to the inking roller (1).
6. A printing unit according to claim 5, characterised in that the variable speed gear (5) is a differential gear.
7. A printing unit according to claim 6, characterised in that the differential gear (5) is a planetary gear.
8. A printing unit according to claim 7, characterised in that the differential gear (5) is an internal gear.
9. A printing unit according to claim 8, characterised in that the internal gear (5) is a "harmonic-drive gear".
10. A printing unit according to one of claims 6 to 9, characterised in that the correcting shaft (6) of the differential gear (5) is driven by an auxiliary motor (8) whose rotational speed is controlled by the computer (19).
11. A printing unit according to one of claims 3 to 10, characterised in that pivoting levers (12) mounted on either side of the roller (1) so as to be fixed relative to the printing unit frame carry the roller (1), and the contact pressure measuring arrangement (20) is provided in the region of the pivoting levers (12).
12. A printing unit according to claim 11, characterised in that the measuring arrangement has electro-mechanical load cells (20) in the frame which measure the bearing pressure of the pivoting levers (12) in their mounting fixed to the frame.
13. A printing unit according to claim 11, characterised in that the measuring arrangement has electro-mechanical load cells (20) in the pivoting levers (12) which measure the bearing pressure of the inking roller axle.
14. A printing unit according to one of claims 3 to 11, characterised in that an integral means for force measurement is located in the adjusting stops (22) which are adjustable by motor.
15. A printing unit according to one of claims 3 to 14, characterised in that the computer (19) is provided with communication interfaces to receive operator desired values from a central computer (36) and/or a console (35) and/or a service unit (37).
16. A printing unit according to claim 15, characterised in that the operator desired values converted by the computer (19) are supplied as an actuating signal to the adjusting stop (22) and/or a regulating circuit (44) for passing on to the actuating arrangement for the rotational speed of the roller (1).
17. A printing unit according to one of claims 15 or 16, characterised in that respective tachometers (16, 17, 18) are associated with the roller (1), the forme cylinder (2) and the drive for the inking roller.
18. A printing unit according to claim 17, characterised in that the tachometers (16, 17, 18) are connected via connecting leads (21, 27, 28) to the computer (19).

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