EP1675986A1 - Method for the adjustment of the thread tension, and gripper shuttle loom or rapier loom - Google Patents
Method for the adjustment of the thread tension, and gripper shuttle loom or rapier loomInfo
- Publication number
- EP1675986A1 EP1675986A1 EP04790495A EP04790495A EP1675986A1 EP 1675986 A1 EP1675986 A1 EP 1675986A1 EP 04790495 A EP04790495 A EP 04790495A EP 04790495 A EP04790495 A EP 04790495A EP 1675986 A1 EP1675986 A1 EP 1675986A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- characteristic
- brake
- thread tension
- expert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 238000009941 weaving Methods 0.000 claims description 71
- 238000012937 correction Methods 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims 1
- 238000012790 confirmation Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
Definitions
- the invention relates to a method according to the preamble of patent claim 1 and a projectile or rapier weaving machine according to the preamble of patent claim 9.
- the invention has for its object to provide a method of the type mentioned and a projectile or rapier weaving machine with which an optimal adjustment of the thread tension for the production operation can be achieved quickly and above all in a user-friendly manner.
- the operator On the basis of the expert result in the form of at least one brake control characteristic, determined in preliminary tests and delivering optimal thread tension conditions in the preliminary tests, the operator has a user-friendly tool at hand when setting the assigned projectile or rapier weaving machines. with which he gets a "safe" basic setting for the start-up phase, for example after a change of the weaving machine, with which the weaving machine is to be put into operation in most cases, whereby a relatively high level of reliability is achieved simply by entering the appropriate expert result, without the operator would have to laboriously carry out a "trial and error" method.
- Expert results relating to the brake confirmation characteristic associated with the thread qualities are expediently determined in the preliminary tests and entered into the expert system. If necessary at all, the operator can then easily and quickly perform a fine adjustment to an optimal thread tension condition in this weaving machine based on the already quite good basic setting by at least the brake actuation characteristics with the aid of clear parameter inputs.
- these parameter inputs for the operator can easily be derived from thread-specific parameters and / or weaving machine-specific or weaving machine equipment-specific requirements, and are not fundamentally based only on the experience or the feeling of the operator.
- the operator can, as soon as he has been informed or informed about the thread quality to be processed, easily enter the correct expert result into the expert system based on the code, which then at least automatically sets the brake actuation characteristic. which already provided optimal thread tension conditions for an equivalent thread quality during the preliminary tests. This enables the operator to get the weaving machine up and running quickly without having to laboriously approach the appropriate setting. The setting can therefore also be carried out quickly by relatively inexperienced personnel.
- the projectile or rapier weaving machine is supplemented profitably by the intelligent and programmed expert system, which allows the correct setting of the thread tension conditions quickly and easily by means of a simple, predetermined code. Thereby the adjustment experiences of the implanted in the weaving machine regardless of the operator's level of experience.
- both a brake actuation characteristic and a thread tension target characteristic for the thread quality to be processed can only be set by entering the correct code, specifically for characteristics that were previously determined to be optimal by preliminary tests carried out by experts under equivalent conditions For the start-up phase, for example, after a machine changeover, the tedious trial and error. The staff is relieved of this procedure, which depends on experience and a high level of care. If at all necessary, a fine adjustment can be carried out starting from a high level of reliability, with the help of clear parameter inputs, which result from the thread quality and / or the machine equipment and do not require any special experience or care from the operator.
- the settings are made quickly and effectively, at least for the start-up phase.
- the process is extremely user-friendly since the programmed programmed electronic expert system only requires the input of the correct code, which the operator immediately understands and can use correctly for the thread quality to be processed. By entering the correct code, the expert system is already brought to a high level of reliability of the setting, from which the staff can quickly and easily reach optimal thread tension conditions.
- the entered expert result is expediently applied directly, ie the start-up phase begins with the settings made by the entry.
- the expert result it is possible for the expert result to be applied by the expert system with at least one clear parameter that is specific to the weaving machine and / or the thread quality. If, for example, a special aggressive and / or mild thread brake device should be provided on the thread delivery device, for example by entering the parameter "aggressive bristle brake", the operator can do this without noteworthy Experience recognizes that the setting is modified immediately by the expert result and applied in a modified form, for example by slightly reducing the brake actuation characteristics due to the aggressive braking device in the delivery device.
- each expert result for the thread quality is uniquely coded with a thread type group coding or a thread number and thread material coding, or with other thread-specific parameter coding, which the operator can easily assign directly to the thread material to be processed by him, without significant consideration. so that he can easily enter the correct code.
- the expert system can be programmed so that it automatically retrieves and uses the appropriate expert result after entering the thread number and the thread material.
- Such fine adjustment can be carried out with little effort and quickly, since there are already basic settings of the brake actuation characteristic and the thread tension target characteristic that are relatively good for the weft thread quality to be processed, so that subsequent corrections can already be carried out on the basis of a relatively high level of reliability of the settings.
- the operator For monitoring and by and for informing the personnel, it is expedient for the operator to display the brake actuation characteristic set by the code and the thread tension target characteristic optionally set, for example on a display, and preferably for modification by entering clear parameter values by the operator.
- a menu is configured particularly expediently, which offers the operator pre-formulated questions on clear parameters, which he answers on the basis of the equipment given on the weaving machine and also with regard to the thread material, and thereby provides additional information processed for modification in the expert system, which the expert system accordingly recycled.
- the respective expert result is also expediently formed from a plurality of different brake actuation levels and / or thread tension setpoints distributed over an insertion process within the entry angle range or the entry duration, or from curves or tables representing the brake actuation characteristic or the thread tension setpoint characteristic. This is expedient in view of the fact that phases occur within an insertion process that are differently critical with regard to the thread tension.
- both the brake actuation characteristic and an assigned thread tension target characteristic can be jointly adjusted with the expert result entered. Then it is particularly easy to make fine adjustments on the basis of deviations of the actual thread tension characteristic achieved by the operation of the controlled thread brake from the nominal thread tension characteristic.
- the expert system is expediently programmed to generate at least one correction value for the brake confirmation characteristic and / or the nominal thread tension characteristic determined on the basis of a comparison between the measured thread tension values and the nominal thread tension characteristic.
- the correction value should be able to be displayed for input by the operator and / or be processed automatically in the brake control, preferably by the expert system.
- the expert system should also be programmed to display the set characteristics on the operator side, for example in a display, and preferably for monitoring and / or for operator modification by means of unambiguous parameter inputs, preferably using a configured operator query menu. The operator then does not need to consult his own experience because he is guided by the expert system and is asked for clear parameters that the expert system processes accordingly.
- the expert system should also be programmed to retrieve at least the weaving machine speed and / or the weaving width in order to take this information into account in the brake control. Because changes in the weaving machine speed, for example, can have a significant influence on the thread tension conditions during operation and in the start-up phase. Since the expert results are based on from / request with different weaving machine speeds, for example, the expert system can adjust itself automatically based on the speed information or request corresponding fine adjustments from the operator.
- the operator selects the thread type in the control panel of the weaving machine.
- the expert system then provides the appropriate braking characteristic for the start-up phase and, if necessary, the appropriate thread tension target characteristic for use.
- the information on the weaving machine speed, weaving width, machine position ie the angular range of the respective rapier or projectile positions within an entry process, in which the correct thread tension is particularly important) is taken into account by the expert system in combination with the selected thread type.
- the operator can enter the thread type or a thread type group, for example, using specific thread parameters. Additionally or alternatively, the operator can enter other specific thread parameters, such as thread material, thickness, elasticity, or equipment.
- a so-called thread quality sensor is even provided in the weaving machine, which automatically detects some or all relevant thread-specific parameters and transmits them to the expert system.
- the Expert system can then provide various alternative information in a manner that is easy for the operator to understand, for example in the control panel of the weaving machine, and so that the characteristics that are initially set automatically can even be modified. Modifications made by the operator to the set characteristics can also be displayed and recorded. The final brake setting, which can be displayed, then results from the thread type and any machine parameters entered.
- additional inputs can be made, for example, to know the friction conditions beforehand and to take them into account in the setting by measuring the thread tension with a known brake setting of the controlled thread brake, for example in the brake-free state, and entering the result into the expert system for additional information.
- the thread can be drawn in by hand or with a "slow weft" of the weaving machine, for example.
- Such a tension test can be initiated automatically as a program routine by the expert system via the weaving machine control, or as required by a command from the operator.
- Such a voltage test can be carried out before start-up, or after a failed start-up attempt to improve the setting.
- Additional inputs for the voltage characteristic by the operator can be made, for example, by an easily understandable number code, or a code that represents parameters of other elements that can influence the voltage, for example a code for the type of delivery device, for the type and the aggressiveness or mildness the braking device on the delivery device, in the latter case different power levels, for example, by entries such as "low, medium, high or the like.” done and taken into account by the expert system accordingly.
- Fig. 1 shows schematically a rapier loom
- 2 shows expert results associated with different thread qualities for setting the weft thread tension in the rapier weaving machine, for example from FIG. 1.
- the method according to the invention is explained using a rapier weaving machine L (FIG. 1), although it can also be used for a projectile weaving machine (not shown).
- a rapier gripper 4 takes over the free end of the weft thread Y offered by a thread selector 3 from a thread channel (several thread channels can be provided), accelerates the weft thread Y from standstill, and transports the free thread end to the middle of a shed 2, where a slave gripper 5 is ready and takes over the free thread end and transports it to the opposite fabric edge.
- the weft thread held ready by the thread selector is pulled through the shed to the other fabric edge in one go by means of a projectile.
- critical phases of each entry process with regard to the thread tension are, for example: the initial takeover phase by the rapier rapier 4, the transfer phase from the rapier rapier 4 to the slave rapier 5, and the final phase of the slave rapier movement.
- critical phases with regard to the thread tension for example: the initial phase and gripping of the weft thread by the projectile, the initial acceleration phase of the projectile, the end phase of the projectile movement and the actual end of the insertion process.
- the rapier weaving machine L shown in FIG. 1 has a shed 2, a thread selector 3 (in particular in the case of a plurality of thread channels) and bringer and slave grippers 4, 5.
- the operation of the rapier weaving machine is carried out by an electronic control C1, in which an input section 11 and a display section 12, for example a display, are provided.
- the respective thread channel contains a thread delivery device F, which takes the weft yarn Y of a certain quality from a supply spool 1, stores it temporarily on a storage body 6, and, if necessary, can be intermittently pulled off by a braking device 8 belonging to the thread delivery device F by a stationary draw-off eyelet 7 as required.
- the thread delivery device F has its own electronic control C2, which can optionally (not shown) be linked to the weaving machine control C1.
- the tensiometer could also be omitted.
- the controlled thread brake B can be controlled by an electronic control C3 which supplies the actuator 9 with a current of a certain strength or a voltage of a certain strength in order to set the thread brake between a brake-free position and different braking strengths.
- the tensiometer T is connected to the control C3 (feedback control loop).
- the control unit C3 can be connected to the weaving machine control unit C1, for example in order to obtain information about the working speed of the weaving machine and / or the weaving width or about the respective position of the gripper and bring rapier 5.
- an electronic, programmed expert system 10 is also provided, which in FIG. 1 is part of the control C3 of the controlled thread brake B or can be connected to it.
- the expert system E could also be connected to the weaving machine control C1 or incorporated into it.
- the expert system E has an input (and possibly display) section 10 on which, for example, different thread qualities are to be processed assigned codes Y1 to Y5 and, if necessary, further parameters for the weft thread and / or the machine equipment can be entered.
- the expert system E converts the code Y1 to Y5 entered in each case at least into a specific brake actuation characteristic (electrical current or voltage values) and possibly also into at least one nominal thread tension characteristic.
- the input is processed either in the expert system E or in the control C3 in order to actuate the thread brake B at the right time and with the correct braking force. If necessary. the measured values b of the tensiometer are already compared with the nominal thread tension characteristic.
- Fig. 2 illustrates the codes Y1 to Y5 for the expert system E in Fig. 1, from which the expert system E reads a brake actuation characteristic A1 to A5, and, if desired, also a target thread tension characteristic B1 to B5 and, e.g. make a corresponding setting in control C3.
- Characteristics stored under codes Y1 to Y5 in the example shown are millivolt values (for the thread tension target characteristic, e.g. force values (in cN)) and have been determined beforehand by tests under equivalent conditions. These tests have been carried out on comparison weaving machines with a wide variety of thread qualities and a wide variety of equipment, and represent expert results K1 to K5 of optimal settings for the different thread qualities.
- the weaving machine speed and / or the set weaving width are available in the control C3.
- the code Y1 to Y5 suitable for the thread quality to be processed is now entered by the operator in the input section 10 via the expert system E.
- the codes Y1 to Y5, for example, are assigned to the different thread qualities in such a way that the operator knows immediately which code to use for his thread quality.
- the expert result K1 to K5 belonging to the code Y1 to Y5 can only be a brake actuation characteristic A1 to A5 (indicated by dashed ends of the blocks in FIG. 2), or even expediently a combination of a respective brake actuation characteristic A1 to A5 and an associated one Thread tension setpoint characteristic B1 to B5.
- the brake actuation characteristic can be defined by electrical voltage values, for example in millivolts, and angle values or time values within one entry process.
- the respective thread tension target characteristic B1 to B5 can be defined by force values (in cN) and angle or time values within an insertion process, expediently assigned to sections within the insertion process that are critical with respect to the thread tension, or in the form of a definition of the respective characteristic , curve to be processed by the expert system E.
- the operator does not have to search for the code Y1 to Y5 for input, but instead only enters, for example, the thread number and the thread material (YCT + Mat), whereupon the expert system assigns the correct code Y1 to Y5 to these inputs and make the appropriate settings at least for the start-up phase.
- a further possibility would be to use a thread quality sensor which scans the weft thread and gives corresponding information to the expert system E or indicates to the operator what has to be entered.
- a further possibility is to input information to the expert system on the type or the properties of the braking device 8 of the thread delivery device and / or on the type of the thread delivery device, the expert system being programmed in such a way that it also uses this information, as well as the set weaving machine speed and / or the set weaving width.
- the settings made by the expert system E can either be displayed in the input section 10 or in the input section 11 of the weaving machine control for the operator, who also has the option of modifying the settings by entering additional parameters.
- the expert system E or the control C3 is expediently programmed such that it or it compares the measured actual thread tension values b with the set desired thread tension characteristic (feedback control) and derives a correction value W in the event of clear, determined deviations.
- This correction value W is expediently presented to the operator so that the operator is able to make appropriate fine adjustments, or is depicted and used in a closed control loop (or in the control C3), for example in order to vary the brake actuation characteristics, and an extensive correspondence between the measured thread tension - To achieve the actual characteristic and the set thread tension target characteristic. Then the rapier weaving machine can be operated normally and woven goods.
- the control C3 is designed for an adaptive brake control, ie fine adjustments, for example continuously, can also be carried out during normal operation if a change in the desired thread tension conditions should become apparent.
- the expert system E can then be out of function.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003148872 DE10348872A1 (en) | 2003-10-21 | 2003-10-21 | Method for adjusting the thread tension, and projectile or rapier loom |
PCT/EP2004/011656 WO2005040470A1 (en) | 2003-10-21 | 2004-10-15 | Method for the adjustment of the thread tension, and gripper shuttle loom or rapier loom |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1675986A1 true EP1675986A1 (en) | 2006-07-05 |
EP1675986B1 EP1675986B1 (en) | 2009-12-09 |
Family
ID=34484862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04790495A Active EP1675986B1 (en) | 2003-10-21 | 2004-10-15 | Method for the adjustment of the thread tension, and gripper shuttle loom or rapier loom |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1675986B1 (en) |
CN (1) | CN1871385B (en) |
DE (2) | DE10348872A1 (en) |
WO (1) | WO2005040470A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1961686B1 (en) * | 2007-02-20 | 2016-09-14 | Iro Ab | Yarn tension monitoring and setting system |
ITPD20110249A1 (en) * | 2011-07-21 | 2013-01-22 | Smit Textile S P A | TEXTILE FRAME WITH SINGLE CALIPER |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1227077B (en) * | 1988-09-08 | 1991-03-14 | Vamatex Spa | SYSTEM TO CONTROL THE WEFT VOLTAGE SUPPLIED TO A TEXTILE FRAME WITHOUT SHUTTLES. |
DE59105505D1 (en) * | 1990-09-10 | 1995-06-22 | Rueti Ag Maschf | Thread brake for weaving machines. |
DE4323748C1 (en) * | 1993-07-15 | 1994-07-14 | Dornier Gmbh Lindauer | Weft brake |
US5476122A (en) * | 1993-03-05 | 1995-12-19 | Lindauer Dornier Gesellschaft Mbh | Weft thread brake responsive to yarn characteristics in a loom |
DE19858682A1 (en) * | 1998-12-18 | 2000-06-21 | Iro Patent Ag Baar | Loom weft feed system has a separation unit at the tensiometer to separate the weft yarn from the probe in the event of a zero yarn tension measurement signal for effective control of the yarn brake |
SE0002813D0 (en) * | 2000-08-02 | 2000-08-02 | Iro Patent Ag | Shut-off braking brake and drive control of Shut-off entries in one web engine |
DE10103342A1 (en) * | 2001-01-25 | 2002-08-01 | Iro Patent Ag Baar | Method for speed control of a thread delivery device of a rapier or projectile weaving machine, and thread processing system |
-
2003
- 2003-10-21 DE DE2003148872 patent/DE10348872A1/en not_active Withdrawn
-
2004
- 2004-10-15 EP EP04790495A patent/EP1675986B1/en active Active
- 2004-10-15 DE DE502004010497T patent/DE502004010497D1/en active Active
- 2004-10-15 CN CN2004800312328A patent/CN1871385B/en not_active Expired - Fee Related
- 2004-10-15 WO PCT/EP2004/011656 patent/WO2005040470A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005040470A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1871385A (en) | 2006-11-29 |
CN1871385B (en) | 2010-07-07 |
WO2005040470A1 (en) | 2005-05-06 |
EP1675986B1 (en) | 2009-12-09 |
DE502004010497D1 (en) | 2010-01-21 |
DE10348872A1 (en) | 2005-05-25 |
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