EP0139926B1 - Straight bar knitting machine (cotton system) - Google Patents

Description

The invention relates to a flat knitting machine (System Cotton) of the type defined in the preamble of claim 1.

Knitting machines of this type have at least one needle bar with rigidly mounted point needles. The stitch is formed by placing a piece of thread over the sharpness of all the needles involved in the knitting process by means of a thread guide, this piece of thread 1-l is then shaped into loops by means of sinkers in order to pull the required amount of thread out of the thread guide, and finally with all needles stitches are formed at the same time.

While the needle bar executes a combined horizontal and vertical movement during the stitch formation process, the thread guide is moved back and forth on a linear path parallel to the needle bar. The Kulierplaininen movably mounted in a sinker head are driven out individually and in succession by means of a Kulierkurve (Rössel, Rösschen) which is also moved back and forth along the needle path, whereby pivoting levers arranged pivotably between the Kulierplatten and the Kulierkurve can be provided as transmission elements.

The path of the thread guide is limited on both sides of the needle bar by fixed stops set according to the desired working or pattern width. It is therefore necessary, on the one hand, to take the thread guide with it via a friction brake sliding on a guide rod and, on the other hand, to provide it with shock absorbers in order to avoid impacts that are too hard and to prevent the thread guide from rebounding when it hits the stops. Instead of just one thread guide, there are often several thread guides which can be taken along and which can optionally be activated by means of couplings.

The linear movement of the thread guide and the curve curve is derived from the rotary movement of a main eccentric shaft, which is driven by means of an electric motor and a continuously variable transmission or a Leonard circuit. In order to adapt the movement of the curve curve to the possibly To enable the desired working width to be very small compared to the needle bar width, the rotary movement of the eccentric shaft is achieved by means of a wedge eccentric, a so-called swing arm, bevel gears, threaded spindles, toothed racks or the like. converted into a reciprocating motion with an adjustable stroke for the wedge curve.

This basic, rather complicated mechanical construction of a flat knitting machine (System Cotton), which has hardly changed since its existence, resulted in several inconveniences. First of all, the friction brake used to drive the thread guide must on the one hand allow so much slip that no blocking occurs when the stops are reached, but on the other hand grip so firmly that no slip occurs during the desired movement phases, since otherwise the usual advance of the thread guide compared to Kulierkurve could be adversely affected. Such an adjustment of the friction brake is not without problems, since the friction conditions often fluctuate greatly when the machine is warmed up or cold. Furthermore, the shock absorbers are disruptive, since they take up additional space and increase the effort. Furthermore, the attacks primarily affect the pattern options and the production speed. In the case of ringing, for example, the thread guides required are often on the wrong side of the needle bar, so that empty rows are required which reduce production. If intarsia patterns can be produced, additional mechanical switching mechanisms in the form of threaded spindles, step switches, cams or the like are required. required to be able to move the stops to both sides, which further increases the effort and further worsens the already unfavorable spatial conditions. Apart from this, such displacements can only take place in small steps due to the design, so that empty strokes are necessary if larger displacements are desired. Finally, in the production of checked and intarsia patterns, the machine often has to be stopped when changing colors in order to change the assignment of the colored yarns to the thread guides by hand or to reset all the stops. This is time consuming and involves high production losses.

To avoid the friction brakes, it is already known (DE-OS'en 29 51332 and 29 51 386) to move both the curling curve and the thread guides without slippage by means of a differential drive. The drive elements guiding the thread guide and the curling curve come to a standstill shortly after the thread guide has hit the stops.

Even with such a drive mechanism, however, neither the stops for the thread guides and the resulting restrictions on the pattern options and the production, nor the complex mechanical components that are required to derive the linear movement of the thread guides and the wedge curve from the rotary movement of the main eccentric shaft can be avoided.

The invention is therefore based on the object to provide the flat weft knitting machine (System Cotton) of the type described above with a newly designed drive for the thread guide and / or the winder curve, which stops and a variety of mechanical components previously required for the thread guide and / or makes the curling curve unnecessary, the production of complicated patterns is simplified and the production speed is increased.

To achieve this object, the characterizing features of claim 1 are provided.

Embodiments of the invention result from the subclaims.

The invention has significant advantages. First of all, the direct drive of each thread guide or each curve curve means that all stops and friction brakes and all those components that were previously required to derive the linear movements of the thread guide and the curve curve from the rotary movement of the main eccentric shaft can be omitted. Furthermore, all those components can be dispensed with that were previously required in the manufacture of samples or also for fitting to adjust the stops for the thread guides according to the pattern. Furthermore, the production speed is increased significantly because the thread guides can be quickly and precisely adjusted to a different working area by means of the direct drives and also no movements derived from the rotary movement of the main eccentric shaft are required, but only new setpoints for the servo motors have to be specified in accordance with the sample. Finally, the working area of the weft knitting machine is largely free of mechanical lever, spindle and switching mechanisms, because the drive devices can be arranged in a drive area arranged next to the working area and therefore only the thread guide and waving curve bars and the slide bearings required to guide them remain in the working area. This considerably simplifies access to the work area during knitting and repair work.

• Fig. 1 schematisch einen erfindungsgemäßen Antrieb für einen Fadenführer;
• Fig. 2 schematisch die Vorderansicht einer erfindungsgemäßen Kulierwirkmaschine (System Cotton) mit einem Arbeitsbereich und einem daneben angeordneten Antriebsbereich;
• Fig. 3 schematisch eine Vorderansicht des Antriebsbereichs nach Fig. 2 in vergrößerter Darstellung; und
• Fig. 4 einen Schnitt längs der Linie IV-IV der Fig. 3.

The invention is explained in more detail below using an exemplary embodiment in conjunction with the accompanying drawing. Show it:

• Fig. 1 shows schematically a drive according to the invention for a thread guide;
• 2 schematically shows the front view of a weft knitting machine according to the invention (Cotton system) with a work area and a drive area arranged next to it;
• 3 schematically shows a front view of the drive area according to FIG. 2 in an enlarged representation; and
• 4 shows a section along the line IV-IV of FIG. 3rd

In Fig. 1, a preferred embodiment of the drive device according to the invention is initially shown schematically independently of the flat weft knitting machine. It contains a servo motor 1 and a belt arrangement, generally designated by the reference number 2. This is driven by the output shaft 3 of the servo motor 1 via a countershaft 4 which is shown schematically as a belt transmission. The belt arrangement 2 has a drive shaft 5 connected to the output of the countershaft 4 with a belt pulley 6 and an axially parallel, loosely rotatable countershaft 7 with a belt pulley 8. Around both pulleys 6 and 8, a belt 9 is placed with a substantially horizontal upper run and a lower run, so that the belt 9 can be moved back and forth in the direction of a double arrow v depending on the direction of rotation of the servo motor 1. The belt 9 is preferably a finite belt, the two ends of which are connected in the region of the upper run by a belt lock 10 to which a carriage 11 is attached. Alternatively, it can be an endless belt, on the upper run of which the carriage 11 is directly attached.

The carriage 11 has a through bore parallel to the upper run of the belt 9, through which a guide rod 12 extends, which is likewise arranged parallel to the upper run of the belt 9 and the ends of which are fastened in the machine frame. The carriage 11 also carries a driver 13 on which a thread guide rod 14 arranged parallel to the upper run of the belt 9 for holding at least one functional element, not shown in FIG. a thread guide is attached.

The servo motor 1 is connected to a control circuit 1 via lines 15, 16 and 17. Actual value signals relating to the respective current actual position of the thread guide rod 14 are fed to this via line 15. These actual value signals are compared in a comparator 19 with the end position signals specified by a setpoint generator 20. The resulting deviation is supplied in the form of an analog voltage to a circuit 21, which converts the analog voltage into a setpoint signal that specifies a setpoint for the speed or speed of the servo motor 1 and is fed to a comparator 22. The comparator 22 also receives actual value signals relating to the instantaneous speed or speed of the servo motor 1 via the line 16 and compares the two signals. The deviation is fed to a control amplifier 23, which causes the servo motor 1 to rotate in one direction or the other until the actual position of the thread guide rod 14 corresponds to the predetermined target position. The difference between the actual position and the target position becomes smaller and smaller, which means that the speed of the servo motor 1 also becomes smaller and smaller until it finally comes to a standstill when the actual position is reached.

A permanent magnet synchronous motor from Indramat GmbH in 8770 Lohr am Main is preferably used as the servo motor 1. The speed of such a servo motor 1 can be regulated, the speed regulation being carried out by electrical commutation and regulation of the current in the stator windings. It also has all the facilities required for recording the current actual position and for producing a desired target position in the form of a feedback unit, which can be used for electrical commutation, speed feedback and incremental position detection (actual value generator), so that additional elements for detecting the actual position of the thread guide rod 14 are not required.

The setpoint generator 20 alternately generates the necessary for the production of any knitted fabric the nominal values for the thread guide end positions at both ends of the knitted fabric. A program controller 24 is preferably connected upstream of the setpoint generator 20, by means of which different setpoints can be generated according to the pattern. These setpoints can in any way, for. B. on film, hole, drum or card memories or the like in the memories of an electronic data processing system. be saved. The stored data are then queried after each revolution of the main eccentric shaft of the weft knitting machine and are offered in the desired sequence to the comparator 19, which can be designed as a differential amplifier. It is also expedient, or the like, the main eccentric shaft with a rotary encoder. to be provided in such a way that it emits a synchronization signal with each revolution and feeds this synchronization signal to the setpoint generator 20 or the program control 24 so that the setpoint signals are provided in the working cycle of the weft knitting machine and the thread guide rods 14 are shifted synchronously with the rotation of the main eccentric shaft.

The mode of operation of the drive device described for the thread guide rod 14 is as follows:

Instead of deriving the back and forth movement of the thread guide rod 14 from the rotary movement of the main eccentric shaft, the thread guide rod 14 is moved back and forth by means of the belt 9 driven by the servo motor 1. The reciprocating rotary movements of the servo motor 1 are generated in response to a switching signal by means of the control circuit 18 which, under the control of the setpoint generator 20 or the program control 24, simultaneously defines the respective end positions of the thread guide rod 14 at both ends of its movement path. By converting the position deviation into a speed setpoint signal, it is achieved that the thread guide rod 14 does not have to be stopped abruptly at the respective end positions, but approaches it at a gradually decreasing speed. The use of the servo motor 1 therefore enables, on the one hand, a movement of the thread guide rod 14 which is independent of the synchronization of the drive of the main eccentric shaft and, on the other hand, the elimination of a large number of mechanical components which have hitherto been derived from the rotary movement of the main eccentric shaft, for shock absorption, for braking or were necessary to move the stops in accordance with the model.

To enter the program and the other commands depending on the type of machine, it is advisable to provide a control panel with a keyboard, whereby visual aids can make checking and troubleshooting easier.

The back and forth movement of the wiping curve is carried out according to the invention in the same way as was described above with reference to the thread guide rod 14. This has the further advantage that this movement also does not need to be derived from the rotary movement of the main eccentric shaft, the mechanically complex components previously required to set the movement stroke of the curve curve are eliminated and the desired advance is easily achieved in both directions of movement by appropriate switching of the servo motors the thread guide rod 14 can be ensured.

A flat weft knitting machine (System Cotton) with a multitude of functional elements in the form of a plurality of thread guides and a winder curve is described schematically below with the aid of FIGS. 2 to 4, each of which is assigned a thread guide or winder curve rod, each with a drive according to FIG. 1 is moved. 2 to 4, only the elements of the flat knitting machine (System Cotton) necessary for understanding the invention are shown.

2, the frame 25 of the flat knitting machine (System Cotton) is divided into a drive area 26 shown on the left and a work area 27 arranged to the right of it. The working area 27 comprises a needle bar 28, on the tip needles of which a knitted fabric 29 is produced, a curling curve rod 30 which carries a curling curve 31, a plurality of thread guide rods 32a to i, of which only the thread guide rods 32a and 32f are shown in FIG. 2 and which each carry a thread guide 33a to i, which feeds threads 34 to the tip needles, and a main eccentric shaft 35 with eccentrics 36. The wedge curve rod 30, the thread guide rods 32 and the main eccentric shaft 35 are horizontally displaceable or rotatably mounted in the machine frame 25 and project axially Extensions each into the drive area 26. A servo motor 37 is mounted in the drive area 26, which is preferably designed like the servo motor 1 and directly drives the main eccentric shaft 35. Above the servo motor 37 is a belt arrangement 38 corresponding to the belt arrangement 2 (FIG. 1), which essentially consists of a driven belt pulley 39, a loosely rotatable belt pulley 40 and a finite belt 41 placed around the latter, the two ends of which are connected by a belt lock are carrying a carriage 42. A driver 43 is fastened to the carriage 42, and the horizontally displaceable curling curve rod 30 is fastened thereon, which is arranged parallel to the two long runs of the belt 41. As shown in FIG. 3, the pulley 39 fastened on a drive shaft 44 is rotated via a countershaft 45 by a servo motor 46 mounted in the machine frame 25 and designed according to FIG. 1, while the pulley 40 is fastened on a loosely rotatable countershaft 47. Otherwise, the arrangement corresponds to the device described with reference to FIG. 1 using the example of the thread guide rod 14.

As can also be seen from FIGS. 2 and 3, a total of 9 within the drive area 26 and above the drive for the curling curve 31 correspond to the belt arrangements 2 according to FIG. 1 Appropriate belt assemblies 48a to i mounted. According to FIGS. 2 and 3, these are arranged one above the other on two levels and, according to FIG. 2 to 4 each show only as many elements of these belt arrangements 48 and of the thread guide rods 32a to i driven by them as is possible for the sake of a clear graphic representation.

According to FIGS. 2 and 3, each belt arrangement 48 comprises a servomotor 49a to i, which is only indicated schematically and corresponds to the servo motor 1 and which can set a drive shaft 50a to i in rotation by means of an additional gear (not shown), and a loosely rotatable countershaft 51a to i. The drive shafts 50a and 50b are arranged axially parallel and at a distance from one another in a left frame part 52 and on the lower floor, while the counter shafts 51a and 51b assigned to them are mounted on the same floor, axially parallel and at a corresponding distance in a right frame part 53. In the left frame part 52, the countershafts 51c and 51d are also mounted on the lower floor, while in the right frame part 53 the corresponding drive shafts 50c and 50d are respectively mounted at equal intervals and axially parallel. In this case, drive or counter shafts are alternately arranged side by side. Because of this nested design, sufficient space is provided in the area of each drive shaft 50 for attaching the servo motors 50a to d, so that the drive area 26 can have a relatively small width despite the large number of shafts and servo motors. A corresponding nesting of the shafts 50e to 50i and 51a to 51i is provided on the upper floor of the drive area 26.

A pulley 52a to i or 53a to i is fastened on each drive shaft 50 or countershaft 51 (FIG. 2). 1, a belt 54a to i is placed around each pair of these pulleys, of which only one belt 54a on the lower floor and one belt 54e on the upper floor are shown in FIGS. 2 and 3. Each belt 54 carries a carriage 55a to i, each with a driver 56a to i and a thread guide rod 32a to i, the carriages 55a to d being fastened to the upper runs of the belts 54a to d and the drivers 56a to in the lower level d project upwards, while on the upper floor the carriages 55e to i are attached to the lower runs of the belts 54e to i and the drivers 56e to i project downwards, resulting in a space-saving arrangement.

Finally, it can be seen from FIG. That the carriages 55a to d and with them the pulleys 52 and 53 of the lower level, respectively, between a front frame part 59 and a rear frame part 60 side by side, i. H. are offset in the axial direction of the associated shafts. The same applies to the slides 55e to 55i on the upper floor. The carriers 56a to i attached to them are each bent towards the center of the machine frame 26, so that the thread guide rods 32a to i carried by them are arranged closely next to one another and the thread guides 33 carried by them can be arranged in the usual manner as it is for Thread insertion is required.

FIG. 4 also shows that, in a preferred embodiment of the invention, each carriage 55, in contrast to FIGS. 1 to 3, is guided by two guide rods 62a to i and 63a to i. The guide rods 62 consist of round rods which are arranged in corresponding bores in the carriage 55. In contrast, the guide rods 63 consist of flat iron, each of which engages in a front or rear recess in the carriage 55. In order to save space, the guide rods 63 can be used by two slides 55, as indicated in FIG. 4, for example, for the guide rod 63b, which projects into a front and rear recess in the slides 55b and 55c. The additional guide rod 63 results in a space-saving, tilt-free guide for the slides 55.

Finally, as a section of FIG. 3, the servo motor 49i, which drives the invisible drive shaft 51i via a countershaft 65, also shows the countershaft 51f with the pulley 53f for the slide 55f, the servo motor 49d, which via a countershaft 66 Drives drive shaft 50d with the pulley 52d, and the countershaft 47 with the pulley 40 for driving the carriage 42, which carries the curving rod 30. The shafts 51f and 50d, like the other shafts, are each rotatably supported in the front and rear frame parts 59, 60 by means of ball bearings 67 or the like.

The drive according to the invention considerably facilitates working on the flat knitting machine (Cotton system). Each servo motor 49 is assigned a control circuit 18 with a setpoint generator 20 and possibly a program controller 24 according to FIG. 1.

When producing smooth, unpatterned goods, all thread guides are switched off except for one. The switched-on thread guide, driven by the servo motor 49, moves back and forth over the whole or a selected part of the working width. There are no stops, friction brakes, gears or the like coupled to the main eccentric shaft 35. needed because the servo motor 49 automatically comes to a stop at the ends of its path of movement under the control of the control circuit 18. The curve curve 30 is moved back and forth in a corresponding manner and also independently of the main eccentric shaft 35. In order to synchronize the rotary movements of the main eccentric shaft 35, the linear movement of the curving curve and the thread guide can be provided to provide a rotary encoder in the form of a disk on the main eccentric shaft 35, which has markings which indicate the respective rotary position of the main eccentric shaft and are scanned by a scanner, whose output signals of the control circuit 18, the setpoint generator 20 and / or the program controller 24 are supplied in order to advance the setpoints or the program and to activate the control circuit 18 at the correct times by means of a "controller enable" switching signal. Such rotary encoders and the associated circuits are generally known from flat and circular knitting machine technology and therefore do not need to be explained in more detail here.

If the working width is constant, the setpoint transmitters 20 only need to alternately deliver two setpoint signals each, which correspond to the end positions of the thread guide or the curving curve. If, on the other hand, a fashioned product is to be produced, the program controls 24 must deliver varying setpoint signals which correspond to the end positions of the thread guide which change according to the pattern and the curling curve. No other adjustments on the machine are necessary, i. H. in particular, the previously required adjustments of the stops for the thread guide and the curving curve and the mostly very complex mechanisms for this can be omitted.

If a striped pattern is to be produced, an empty row must always be provided in conventional knitting machines, during which the machine does not work if the thread guide required in the subsequent course of stitches is arranged at the wrong end of the needle bar. When using the knitting machine according to the invention, on the other hand, only a comparatively short standstill of the main eccentric shaft is required in order to transport the incorrectly positioned curling curve to the correct end of the needle bar because its movement is independent of the movement cycle of the main eccentric shaft, and work can then continue immediately. With each such change, much less time is lost than corresponds to a full course.

The production of intarsia patterns is also simplified, since the program controls 24 of all thread guides can in each case emit varying setpoint signals for the end positions of the thread guides that change in pattern. Therefore, the usual right-hand and left-hand threaded spindles for adjusting the stops previously required are unnecessary. Since these threaded spindles and the control elements required for their control are very space-consuming, they were usually only assigned to a few selected thread guides. When using the drive according to the invention, however, all thread guides can be used for intarsia patterns simply by program control. Because this drive is independent of the rotary movement of the main eccentric shaft, comparatively large changes in the end positions of the thread guides can also be provided per cycle.

Finally, there are also considerable advantages in the production of such checked or intarsia patterns, which consist of color fields arranged in a checkerboard fashion, although the color within the individual fields can change continuously. So far, it has mostly been done by stopping the machine after the production of a complete body row and then either replacing the threads guided by the thread guides while maintaining the stop positions, or changing the stops accordingly while maintaining the thread assignment. When using the invention, it is only necessary to program the program controls 24 accordingly and after completion of a row of carriages to move the thread guides to one side or the other so far that they are assigned to the then desired knitted area during the manufacture of the next row of carriages. Here too, the main eccentric shaft only has to be stopped very briefly.

The servomotors 1.37, 46 and 49 according to the invention are, for example, at speeds up to 2000 rpm. operated, which are reduced to a preselected value by means of the additional gear 4, 65 and 66. With these speeds, linear movements of the thread guides or curving curves from 100 to 120 m / min can easily be achieved. that are sufficient to make the weft knitting machine (System Cotton) work at a speed of, for example, 100 courses per minute at full working width.

The invention is not restricted to the exemplary embodiments described. Instead of the belt arrangements shown, for example chain, gear and rack arrangements or the like. can be provided to convert the rotational movement of the output shafts of the servo motors into a linear movement of the thread guide and curling cam bars. Apart from this, the belts preferably consist of toothed belts and the pulleys accordingly of toothed belt pulleys in order to avoid slippage. The reduction gears shown can be replaced by any other reduction gears. It would also be possible to have the belt arrangements or the like act directly on the thread guides and curling curves and these or the like can be moved on stationary guide rods. back and forth to store. Furthermore, other servomotors can be provided instead of the servomotors mentioned, provided that an exact position control is possible with them. Corresponding servomotors can also be used to move the decker rods of any existing sample decks. All program controls known for this purpose from knitting machine technology, in particular also those with microprocessors and electronic data processing devices, can be used to generate the target position signals. To determine the position list signals, other devices can be used instead of the actual value generator integrated in the servo motors, for example those with line grids, which are attached to the guide rods for the slides and are scanned by devices mounted on the slides. Farther the invention can be applied to flat knitting machines (System Cotton) with more than one needle bar. Furthermore, it is possible to choose the arrangement of the drive and counter shafts differently than in accordance with FIGS. 3 and 4 or to arrange a drive area for the servo motors on both sides of the needle bar. Finally, a plurality of thread guides or curve curves can be attached to each thread guide or curling curve rod, which are assigned to a corresponding plurality of working areas within the needle bar, in order to simultaneously produce a plurality of knitted fabrics on a needle bar in a known manner.

Claims (10)

1. Flat bed full-fashioned knitting machine (Cotton system) having at least one needle bar, wherein, for the purpose of stitch forming, at least one operating element in the form of a yarn guide and/or sinker cam is mounted in a manner such that it can reciprocate between two preselected limit positions, and having a drive device for generating the reciprocating motion, characterized in that the operating element (31, 33) is coupled to a drive means (41, 54) that is part of a drive arrangement (38, 48) which is coupled to a drive device and which generates linear motion of the operating element (31, 33), an electronic control circuit (18) being provided in association therewith, by means of which a servomotor (46, 49), associated with the drive device for causing the operating element (31, 33) to reciprocate, can be controlled in a manner such that it stops whenever a preselected limit position is reached.

2. Knitting machine according to Claim 1, characterized in that a plurality of operating elements (31, 33) are provided, and the drive device for causing each individual operating element to reciprocate has in each case both a servomotor (46, 49) and an electronic control circuit that is connected thereto.

3. Knitting machine according to Claim 1 or 2, characterized in that the control circuit (18) has a program control unit (24) which is connected on the input side of a required-value generator (20), this program control unit (24) serving to vary the limit position signals in accordance with the pattern.

4. Knitting machine according to any one of Claims 1 to 3, characterized in that the drive arrangements (38,48) and servomotors (46, 49) of all the operating elements (31, 33) are accommodated within a drive region (26) which is located laterally beside a needle bar (28) that surrounds the working area (27).

5. Knitting machine according to Claim 4, characterized in that each operating element (31, 33) is secured to a bar (30, 32) which is displaceable parallel to the needle bar (28), which projects laterally into the drive region (26).

6. Knitting machine according to Claim 5, characterized in that each drive arrangement (38, 48) has a carriage (42, 55) which is guided on at least one guide bar (62, 63), which is coupled to the associated drive means (41, 54), and on which the bar (30, 32) of the associated operating element (31, 33) is secured.

7. Knitting machine according to at least one of Claims 4 to 6, characterized in that each drive arrangement (38, 48) has a drive shaft (44, 50) that is coupled to the associated servomotor (46, 49), and an idly rotatable countershaft (47, 51), these shafts carrying belt pulleys (39, 40 and 52, 53 respectively) for belts (41, 54).

8. Knitting machine according to Claim 7, characterized in that the drive shafts and countershafts (44, 50 and 47, 51 respectively) are arranged in several tiers, all shafts being parallel with one another and alternate ones being side-by-side, whereas the belt pulleys (39, 40 and 52, 53 respectively) and belts (41, 54) in each tier are arranged in a manner such that they are displaced relative to one another in the axial direction.

9. Knitting machine according to at least one of Claims 1 to 8, characterized in that it has a rotatably mounted main eccentric shaft (35), a servomotor (37) and a control circuit also being provided for driving this shaft.

10. Knitting machine according to at least one of Claims 1 to 9, characterized in that it has a narrowing means that comprises narrowing rods, to each of which a servomotor and a control circuit are assigned.

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