Abstract
The invention relates to a method for controlling means of a workstation of a textile machine producing yarn (1) comprising a compensating unit (9) for the compensation of a yarn (1) loop with a compensating member (6, 8) and, optionally, with a rotary drum (7), whereby on the compensating unit (9) are further arranged internal means (10,15) and external means (14, 16) of detecting the compensating unit (9), in which the information from the internal means (10,15) and the external means (14, 16) of detection is used by a controller of work nodes of the workstation for the controlling activity of the control unit (11) and selection of activation of software procedures is performed on the basis of the information about the state in which the workstation is at a given moment (the course of yarn (1) formation and winding, servicing activity).
In addition, the invention also relates to a device for performing the method for controlling means of a workstation of a textile machine producing yarn (1), which comprises a control unit (11) coupled via a bidirectional communication channel to internal means (10, 15) or external means (14,16) of detecting the current state of the compensating unit (9) and to work nodes at the workstation of the textile machine, whereby the control unit (11) is provided with a decision-making and driving controller of the work nodes of the workstation according to the state of the compensating unit (9).
Claims
1. A method for controlling means of a workstation of a textile machine producing yarn (1) comprising a compensating unit (9) of a yarn (1) loop with a compensating member (6, 8) and, optionally, with a rotary drum (7), in which at least one quantity about the current state of the compensating member (6, 8) and/or of the optional rotary drum (7) is sensed, characterized in that from the sensed quantity is generated a state value which is introduced to the control unit of at least one other work node of the workstation and/or of the machine to control this other work node of the workstation and/or of the machine.
2-10. (canceled)
Description
DESCRIPTION OF THE DRAWINGS
[0023] The invention is schematically represented in a drawing, where:
[0024] FIG. 1 shows an arrangement of a workstation of a yarn manufacturing textile machine with an arm compensator of a yarn loop,
[0025] FIG. 2 shows an arrangement of the workstation of a yarn manufacturing textile machine with a drum intermediate storage device of yarn and a rotary compensating arm,
[0026] FIGS. 3 to 9 show schematic representation of situations when using output information of the compensating unit to control other devices of the workstation,
[0027] FIG. 10 shows a flowchart of the device for performing the control method, and
[0028] FIG. 11 shows a diagram of a method for controlling other devices of the workstation of the spinning machine.
EXAMPLE OF EMBODIMENT OF THE INVENTION
[0029] The present invention will be described with reference to an exemplary embodiment of a yarn manufacturing textile machine, which comprises at least one row of identical workstations arranged next to each other, at which yarn 1 is produced from sliver 18 supplied by a feeding device 17 in the spinning unit 12, from which yarn 1 is withdrawn by means of a draw-off mechanism 2 and after that it is wound on a bobbin 4 by means of a winding device 3 of yarn 1. A traversing device 5 is located between the draw-off mechanism 2 and the winding device 3 of yarn 1 in the path of yarn 1. The traversing device 5 traverses the wound yarn 1 over the width of the bobbin 4. A compensating unit 9 for compensating for the loop of yarn 1 is arranged between the traversing device 5 of yarn 1 and the draw-off mechanism 2 of yarn 1.
[0030] According to the exemplary arrangement of the workstation of FIG. 1, the compensating unit 9 of yarn 1 is formed by an arm compensator on which is arranged a swing compensating member 6 which compensates for the loop of yarn 1 which is formed during the traversing of the yarn 1 over the width of the cross-wound bobbin 4, especially conical. The compensating unit 9 is equipped with internal means 10, or external means 14 of detecting its operation which sense, for example, the position, direction and speed of movement or torque of the compensating member 6 and this information is sent to the control unit 11 of the workstation which is coupled via a bidirectional communication channel to the internal means 10 or the external means 14 of detecting the current state of the compensating unit 9 and which is further provided with decision-making and driving controllers C,D,E,F,G and H of the working nodes of the workstation. In the exemplary arrangement, decision-making and driving controller C shown in FIGS. 10 and 11 serves to control the compensating unit 9, controller D controls the winding device 3, controller E controls the service robot 13 of the spinning stations, controller F controls the draw-off mechanism 2 of yarn 1, controller G controls the spinning unit 12 and controller H controls the feeding device 17 of sliver 18. The control unit 11 evaluates information about the state of the compensating unit 9 and, together with a machine control unit (not shown), performs the control activity in at least one of several different software procedures, depending on whether the workstation is in normal, i.e., operational, process, when the yarn 1 is spun and wound on the bobbin 4, or whether service and service operations are performed by the workstation's own means or by the service robot 13. The same information from the internal means 10 or external means 14 of detection may lead to different procedures and activities at the workstation of the machine depending on the operating mode of the workstation in which the information was passed to the control unit 11 of the workstation. Subsequently, the control unit 11 selects an appropriate procedure for the operations at the workstation.
[0031] According to the exemplary arrangement of the workstation of FIG. 2, the compensating unit 9 of yarn 1 is formed by an intermediate storage device of yarn which comprises a rotary drum 7 for accumulating yarn 1 with a drive and a compensating member 8 with a drive performing compensation of a yarn 1 loop which is formed during the traversing of the yarn 1 over the width of the cross-wound bobbin 4, especially conical. The compensating unit 9 is equipped with internal means 15 or external means 16 of detecting its operation, which sense, e.g. the position, direction and speed of the movement, number of revolutions or the yarn reserve of the compensating member 8 or of the drum 7 and this information is passed to the control unit 11 of the workstation, which evaluates it and, together with an unillustrated control unit of the machine, performs the control activity at least in one of multiple different software procedures, depending on whether the workstation is in normal, i.e., operational mode, when the yarn 1 is spun and wound onto the bobbin 4, or whether or whether service and service operations are performed by the workstation's own means or by the service robot 13. The same information from the internal means 15 and from the external means 16 of detection may lead to different procedures at the workstation of the machine according to the operating mode of the workstation during which the information was sent to the control unit 11 of the workstation. Subsequently, the control unit 11 selects the appropriate procedure of operations at the workstation.
[0032] According to the exemplary embodiment of the method shown in FIG. 3 the information about the position of the compensating member 6 from the internal means 10 or from the external means 14 of detecting the compensating unit 9 is used during the service operations taking place at the workstation, when the yarn end 1 is unwound from the package of the bobbin 4, and, at the same time, the compensating member 6 maintains by its swinging movement within a predetermined swing range A the required tension in the yarn 1 being unwound. If the compensating member 6 is deflected outside the predetermined swing range A, e.g., to range B, the internal detection means 10 or external detection means 14 of the compensating unit 9 transmits through the bidirectional communication channel information to the control unit 11, which decides, according to the respective software procedure for performing service and service operations, on the further procedure of performing the activity at the spinning station. For example, it may decrease/increase the reverse drawing-off speed of the draw-off mechanism 2 or may decrease/increase the reverse unwinding speed of the bobbin 4. The compensating unit 9 in this case serves as a sensor of the tension in the yarn 1 during a service operation.
[0033] According to the exemplary embodiment of the method shown in FIG. 4, the information from the internal means 10 or external means 14 of detecting the compensating unit 9 is used during the formation and winding of the yarn 1, when the yarn 1 is withdrawn by the draw-off mechanism 2 from an unillustrated yarn 1 forming unit and is wound by the winding device 3 on the bobbin 4. During the process of winding yarn 1 on the bobbin 4, the tension in the yarn 1 being wound regularly changes due to the traversing of the yarn 1 over the width of the wound bobbin 4 and the compensating member 6 performs compensation of a yarn 1 loop to maintain the tension in the yarn 1 within the predetermined range, which is setcalibrated in each compensating unit 9 by setting the swing range A of deflection of the compensating member 6. The tension in the yarn 1 during winding the bobbin 4 may vary, for example, as a result of a change in the slip between the winding roller 3 and the package of the bobbin 4, which causes a change in the winding speed, in this case its decrease, whereas the drawing-off speed of the draw-off mechanism 2 does not change. Due to different drawing-off and winding speeds, the tension in the wound yarn 1 decreases, which manifests itself in the deflection of the compensating member 6 from the predetermined range of the tension in the yarn 1 and the swing compensating member moves to range B, which is recorded by the internal means 10 or the external means 14 of detection. The reduced tension in the yarn 1 can result in the formation of undesired loops on the yarn 1 and in the poor structure of the package on the bobbin 4. The control unit 11 of the workstation evaluates the deviation of the compensating member 6 from the predetermined yarn 1 tension range in the normal (operational) process as a difference, i.e. discrepancy of the drawing-off and winding speed and the drawing-off and winding speed of yarn 1 is adjusted in the preset software procedure. During winding yarn 1 on the bobbin 4, the compensating unit 9 of the yarn 1 provides information about the yarn 1 tension and on the mutual relation between the winding and drawing-off speeds of the yarn 1.
[0034] According to another embodiment of the method shown in FIG. 5, the information about the speed of rotation of the drum 7 and of the compensating member 8 of the intermediate storage device of yarn 1 during the formation and winding of the yarn 1 on the bobbin 4 is used to detect a yarn 1 break. The information about the speed of the compensating member 8 for the control unit 11, which suddenly increases, serves as information about a yarn 1 break between the draw-off mechanism 2 and the winding device 3, or the information about the incorrect unwinding of yarn 1 from the drum 7 of the intermediate storage device of yarn caused by the malfunction of the winding device 3.
[0035] According to another embodiment of the method shown in FIG. 6, the information about the decrease in the actual revolutions of the compensating member 8 of the intermediate storage device of yarn 1 compared to the predetermined number of revolutions of the compensating member 8 caused by the presence of yarn 1 or of an unillustrated mechanical device in the travel path of the rotary compensating member 8 is used during production activity, which causes slowing or complete stopping of the compensating member 8. The information is evaluated by the control unit 11 and is used as a starting impulse for the subsequent automatic operations of the service of the workstation.
[0036] According to another embodiment of the method shown in FIG. 7, the control unit 11 uses the information about the current position of the compensating member 8 of the intermediate storage device of yarn 1 to stop the compensating member 8 in the required position, e.g. in the direction of the suction of yarn 1 from the drum 7 of the intermediate storage device of yarn 1 to an unillustrated trash removal pipeline during service operations at the workstation.
[0037] According to another embodiment of the method shown in FIG. 8, the information about the speed of rotation of the drive of the drum 7 and the drive of the compensating member 8 of the intermediate storage device of yarn 1 during the formation and winding of the yarn 1 on the bobbin 4, which is used in a known manner for determination of the yarn 1 reserve on the drum 7 of the intermediate storage device of yarn, is used to determine the length a of the wound yarn 1 on the rotary drum 7, onto which the yarn 1 is wound during the servicing operation before connecting the end of yarn 1 unwound from the package of the bobbin 4 to the beginning of the yarn 1 being supplied from the yarn forming unit during the resumption of spinning at the workstation. At this stage, the control unit 11 knows that the workstation is in an intermediate state and in a pre-set software procedure the predetermined length a of the yarn 1 is wound, corresponding to the determined number of revolutions of the rotary drum 7, which is crucial for carrying out the entire process of resuming spinning and winding the yarn 1 at the workstation. In this case, the compensating unit 9 serves to measure the required length a of the yarn 1 when connecting the yarn 1 during the service operation at the workstation.
[0038] According to another embodiment of the method shown in FIG. 9, the information from the internal means 15 from the external means 16 of detecting the compensating unit 9 is used during the production activity in intermediate states, such as during a yarn 1 break or when removing a defect in the yarn 1, during which the yarn 1 is unwound from the package of the bobbin 4 and the passage of the yarn 1 in this direction is detected through sensing the specific position of the compensating member 8 of the compensating unit 9, whereby this position differs from the range of positions during production activity. The control unit 11 of the workstation knows that it is in non-working mode and selects a corresponding software procedure in which it evaluates the information about the position of the compensating member 8 and subsequently performs the control of the service means of the workstation or of the service robot.
LIST OF REFERENCES
[0039] 1 yarn [0040] 2 draw-off mechanism [0041] 3 winding device [0042] 4 bobbin [0043] 5 traversing device [0044] 6 compensating member (swing) [0045] 7 drum [0046] 8 compensating member (rotary) [0047] 9 compensating unit [0048] 10 internal means of detection (for arm compensator) [0049] 11 control unit [0050] 12 spinning unit [0051] 13 service robot [0052] 14 external means of detection (for arm compensator) [0053] 15 internal means of detection (for drum intermediate storage device) [0054] 16 external means of detection (for drum intermediate storage device) [0055] 17 feeding device [0056] 18 sliver [0057] A predetermined swing range [0058] B swing range [0059] C compensating unit controller [0060] D winding device controller [0061] E service robot controller [0062] F draw-off mechanism controller [0063] G spinning unit controller [0064] H feeding device controller [0065] a length of yarn
