GB2240193A - Sewing apparatus with correctable sewing path - Google Patents
Sewing apparatus with correctable sewing path Download PDFInfo
- Publication number
- GB2240193A GB2240193A GB9027867A GB9027867A GB2240193A GB 2240193 A GB2240193 A GB 2240193A GB 9027867 A GB9027867 A GB 9027867A GB 9027867 A GB9027867 A GB 9027867A GB 2240193 A GB2240193 A GB 2240193A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sewing
- data
- path
- correcting
- sewn
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/04—Sewing machines having electronic memory or microprocessor control unit characterised by memory aspects
- D05B19/08—Arrangements for inputting stitch or pattern data to memory ; Editing stitch or pattern data
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
- G05B19/4083—Adapting programme, configuration
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45195—Sewing machines
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/47—Tracing, tracking
- G05B2219/4703—View whole surface before edge detection, coarse scan then fine tracking
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/47—Tracing, tracking
- G05B2219/4704—Store actual edge, seam in memory before machining, compare with detected
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/50—Machine tool, machine tool null till machine tool work handling
- G05B2219/50151—Orient, translate, align workpiece to fit position assumed in program
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Textile Engineering (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
In a sewing apparatus comprising a sewing head 3 and an X-Y system for the movement of a workholder 5 containing material 6 to be sewn, operated according to a predetermined sewing path 7, the operation of the sewing head is controlled by data storing and supplying means (PC fig 2) which stores data encoding the predetermined sewing path. The device comprises edge detecting means 8 such as a camera, which is separate from the sowing head 3 and located remote from it, and which encodes and stores data defining the actual position of the material to be sewn and transmits the data to correcting means (SMP fig 2) which corrects the predetermined sewing path according to the data encoding the actual position of the material to be sewn. All the data is detected, encoded and stored before sewing begins. A number of predetermined sewing paths may be stored. <IMAGE>
Description
SEWING APPARATUS WITH CORRECTABLE SEWING PATH
Field The Invention
The present invention relates to sewing apparatus with correctable sewing pails More particularly, the invention relates to a method and apparatus for correcting the sewing pa1ih of an automated sewing machine according to the actual position ofthe material being sewn BACS(ROUND OF WE INVENTION
It is known in the art to employ automated, particularly computerized sewing apparatus to produce a predetermined sewing path, according to information provided to the sewing head by a microprocessor or similar device.In automated sewing machines, the material to be sewn is fastened or mounted onto a workholder which permits free movement of a needle through the material. The actual path followed by the workholder and the needle is dictated by the directions received from the part of the apparatus which stores and delivers to the sewing head and to the X-Y system the information concerning the actual sewing path to be followed.The so-called tSXy system" is a mechanism well known to those skilled in the art, which has the purpose to move the workholder in the X and Y directions, with respect to the static sewing head and needle, thereby creating the sewing path As will be appreciated by a person skilled in the art, even if great care is taken in positioning and fastening the material to be sewn on the workholder, it is impossible in everyday work to produce workholder-mounted material in which all pieces are identical.Particularly, when two or more different pieces of material are sewn together, it is very difficult to produce combined pieces which are all mounted identically. Therefore, when the workilolder is mounted on the sewing machine, different pieces to be sewn may be slightly diiThrent, the material may have been differently fastened on the worgholder or may have been cut slightly differently, the material may have moved for any reason so that the resulting sewing path may be irregular, may differ from one piece to another, and may be incorrect.In order to overcome this problem, it is known in the art to employ edge sensors, to detennine the actual position of different pieces of material and to correct the operation of the sewing apparatus according to the deviation of the material to be processed from a predetermined standard. One such method, as described, e.g., in U.S.
Patent 4,784,071 and in EP 309,069, comprises providing edge position sensing apparatus, such as a camera, which moves around the sewing head, to follow the same path which is to be followed by the needle, being always slightly ahead of the needle. In this way, the edge sensor relays information concerning the actual positioning of the edge of the material to be sewing to the computerized apparatus and correct the movements of the X-Y system which is responsible for the movement of the worilliolder, which will be affected in accordance to the predetermined path, according to the actual positioning of the material in the workholder.The sensor moves ahead of the needle, to provide a positive feedback to the system, or alternatively more than one static head is provided to cover the entire path of the needle. Additionally, lighting apparatus is provided, to ensure that the edge sensing apparatus is able to detect the edge of the material.
The method and apparatus of the art present different drawbacks. F6r instance, it is relatively complicated to provide edge position sensing apparatus which follows the movements of the workholder, and which moves accordingly, and lighting apparatus for the same purpose. It is furthermore ex-pensive and inconvenient to position edge sensing apparatus on and around the sewing head Furthermore, correcting the sewing path during sewing in this way, while possible, may present some disadvantages in control operations.
SUMMARY OF mE LNVENTFON It is therefore an object of the invention to provide an apparatus and a method which overcome the aforesaid disadvantages, and which provide easy and correct correction patterns for the predetermined sewing pat The invention is thus dicected to an iniprovement in a sewing apparatus which comprises a sewing head and an X-Y system operated according to a predetermined sewing path, and in which the operation of a sewing head is controlled by data storing and supplying means which store data encoding the predetermined sewing patha and the material to be sewn is contained in a movable workholder, the improvement comprising providing edge detecting means separate from the said sewing head and located outside the sewing plane, said edge detecting means being adapted to detect, encode and store data defining the actual position of the material to be sewn, means for transmitting the data encoding the said actual position to correcting means, and correcting means for correcting the predetermined sewing path according to the data encoding file actual position of the material to o be sewn, the detection, encoding and storing of said data for the correction of the predetermined sewing path being preferably effected before sewing begins, By sewing plane" is meant the area located around the sewing head, in which sewing movements take place.
Thus, according to the invention, the need for edge detecting means mounted on or around the sewing head is dispensed with, comparison of predetermined data with actual correcting data can be done before sewing actually begins, and there is no need to correct these data during operation of the apparatus. This, as will be apparent to a person skilled in the art, results in a considerable simplification of the apparatus and operations. The edge detection can be effected before the material to be processed reaches the apparatus, either when the material moves along the apparatus on its way to the sewing head, and passes below edge detecting means, or by stopping the workholder containing the material to be processed before it reaches the X-Y system and statically viewing it with appropriate viewing means.
According to a preferred embodiment of the invention, the edge detecting means comprise an optical element, more preferably at least one camera As will be apparent to the skilled person, data storing and supplying means, as well as correcting means, data processing and delivering means, can be provided in a great variety of ways. Preferably, however, these various means comprise at least one microprocessor
Often, all these means can be condensed into a single device which employs only one microprocessor.
Another advantage of the invention is that the data storing means may contain information concerning a number of different predetermined sewing paths, for processing entirely different materials. Thus, because the edge detection and corredo:o of the sewing path is effected before the sewing head starts working, it is possible to provide additional means for selecting one of a number of preselected different sewing paths, to detect the actual position of the material in the workholder, and to correct this speciiic selected predetermined sewing path accordingly.
Conveniently, data on the choice of preselected sewing paths can be provided on the workholder, either by mechanical, optical, magnetic or other signalling means.
In accordance with the present invention, there is queer provided a method for correcting the sewing path of an automated sewing apparatus, which method comprises providing edge detecting means positioned along the feeding path of the workholder containing the material to be sewn, generating sewing path correcting data by detecting, encoding and storing data defing the actual position of the material to be sewn, and feeding the correcting data so generated to correcting means, to correct the predetermined sewing path before transmitting it to the X-Y system of the sewing machine.
DETAILED DESCRIPTION OF PREIERREI) EMBODIMENTS All the above and other characteristics and advantages of the invention will be better understood through the following illustrative and non- limitative description of preferred embodiments, with reference to the appended drawings, wherein= - Fig. I is a perspective view of part of the sewing apparatus, the edge detect means being shown; and - Fig. 2 is a block diagram of the operation of the apparatus of Fig. 1.
With reference now to Fig. I, a main frame, generally indicated at 1, comprises a sewing head 2 with sewing needle 3. X-Y moving means, generally indicated at 4, are provided, to move the worEholder during sewing operations. The workholder itself, 5, consists of a plate which is open to expose the part of the material which must be processed, the said opening being indicated at 6. The sewing path 7 is also schematically shown in broken lines. According to the embodiment of the invention shown in Pig. 1, an optical edge detecting device, conventionally known in the art and indicated by 8, is positioned above the part of the main frame through which the worEolder passes on its way to the sewing head.The optical edge detecting means may be of any type conventionally employed in the art, which will be recognized by the skilled technician. For instance, the device 8 may consist of a number of stationary cameras which together cover substantially all the area of interest of the workholder.Thus, when the workholder is positioned below this array of cameras, their joint picture will generate actual posioning data for the entire area of the workholder. Alternatively, a scanning camera may be positioned so as to cover the entire width of the workholder.When the workholder moves towards the sewing head,as indicated by the arrows, the camera 8 scans it and generates an output consisting of data which encode the actual data for the edge positioning of the material to be processed.Encoding, transmission and so on of these data are conventional operations well within the scope of the skilled technician
The scanning operation can be effected while the workholder is moved through the scanner even manua7Ny, although automated driven scaaring should be preferred for pres,lom The man of the art will be able to provide appropriate reference means, to determine the actual scanning speed at a given time, in order to correctly interpret the data generated.
Thus, the operations carried out according to this embodiment of the invention are those schematically shown in Fig. 2.The sewing head designated by SH in the block diagram, receives data from a main microprocessor, MMP. These are ON/OFPl commends, and control the penetration of the needle into the material The microprocessor MMP also controls the movement of the S-Y system, and this is the movement that must be corrected to take into account the actual positioning of the material being sewn
The MMP receives data and control commands from three major sources: the Control Panel, CP, the Programs Cartridge, PC, and the
Main Internal Memory, MIAL Additional input/output devices can of course be provided, such as for printouts or data reading, which are not essential to the invention and are therefore not shown in the figure.
The CP receives commands from the operator, such as program selection, stopping and resuming of operation, etc.
The PC contains pre-recorded sewing programs, consisting of X-Y data for the X-Y system, coupled with ONZOFF data for the sewing head (needle). The MMP may draw the data needed for operation during sewing directly from the PC, or the sewing program selected may be first read into the MIM, from which data can also be withdrawn by the
MMP.
When operating according to the invention, the edge detecting means,
ED (as said, normally a camera), to which there are coupled encoding means, EM, transmit encoded data which represent the actual edge position to a Servo Microprocessor, SMP. The SMP receives the data representing the sewing program, either from the PC or from the MIM, and compares the data corresponding to the edge position with the actual edge position of the piece to be sewn, and generates a corrected pattern to take into account any deviation from the planned edge positioning (schematically indicated by C:D in the figure). According to a preferred embodiment of the invention, the CD are then input to the mix and replace the data for the sewing program obtainable from the
PC.
As will be apparent to a person skilledin the art, the CD consist of correcting data for the edge position, or may already include the entire corrected program. According to one embodiment of the invention, the
SMP may be a part of the MMP, and no separate microprocessor is needed, or a third microproeessor (not shown in the figure) may be used to coordinate the flow of data. Likewise, the SH may be part of the internal memory of the MUMP, or may be a separate memory.
According to a preferred embodiment of the invention, the correction operations are effected while or before the workholder is positioned, so that sewing operation starts using the already corrected program It is possible, however, to prepare the correcting data in this manner, and to effect the actual correction of the sewing program during sewing.
As will be apparent to a person skilled in the art, the invention has several advantages. No devices must be positioned on or near the sewing head, the precision of the movement of the detecting means required is not great, and the devices employed are sinipler and less expensire than those of the art. It will be amderstood that the above description has been given only for the purpose of illustration, and is not intended to be limitative. Different parts, means and devices can be provided by the skilled person, in order to carry out the invention, without exceeding its scope.
Claims (1)
- CLMMSI. lii a sewing apparatus comprising a sewing head and an X-Y system for the movement of a workholder, operated according to a predetermined sewing path, the operation of the sewing head being controlled by data storing and supplying means which store data encoding the predetermined sewing path, and the material to be sewn being contained in a movable woridiolder;; the improvement comprising providing edge detecting means separate from the said sewing head and located outside the sewing plane, as hereinbefore defined, the said edge detecting means being adapted to detect, encode and store data defining the actual position of the material to be sewn, means for transmitting the data encoding the said actual position to correcting means, and correcting means for correcting the predetermined sewing path according to the data encoding the actual position of the material to be sewn, the detection, encoding and storing of said data for the tile correction of the predetennjlled sewing path being preferably effected before sewing begins.2. Apparatus according to claim I, wherein the edge detect;ing means comprise an optical element.3. Apparatus according to claim 1, wherein the edge detecting means comprise at least one camera.4. Apparatus according to any one. of claims I to 3, wherein the data storing and supplying means and the correcting means comprise at least one microprocessor.6. Apparatus according to claim 4, wherein the data storing and supplying means contain a plurality of independently selectable sewing paths, and means are provided on the workholder to identifY the appropriate sewing path 6. A method for correcting the sewing path of an automated sewing apparatus, comprising providing edge detecting means separate from the sewing head of the apparatus along the feeding path of the workholder containing the material to be sewn, generating sewing path correcting data by ewosing the workholder to the viewing field of the edge detecting means, and feeding the correcting data so generated to correcting means, to correct the predetermined sewing path before trailsuitting it to the sewing head, 7. A sewing apparatus substantially as hereinbefore described with reference to and as shown in the accompanying drawings.8. A method for correcting the sewing path of an automated sewing apparatus substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL92916A IL92916A0 (en) | 1989-12-28 | 1989-12-28 | Sewing apparatus with correctable sewing path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9027867D0 GB9027867D0 (en) | 1991-02-13 |
| GB2240193A true GB2240193A (en) | 1991-07-24 |
Family
ID=11060736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9027867A Withdrawn GB2240193A (en) | 1989-12-28 | 1990-12-21 | Sewing apparatus with correctable sewing path |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2240193A (en) |
| IL (1) | IL92916A0 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679749A1 (en) * | 1991-10-15 | 1995-11-02 | Orisol Original Solutions Ltd. | Apparatus and method for preparation of a sewing program |
| WO1996023626A1 (en) * | 1995-01-31 | 1996-08-08 | British United Shoe Machinery Limited | Edge detection in automatic sewing apparatus |
| GB2317026A (en) * | 1996-09-09 | 1998-03-11 | Electrolux Ab | Embroidery machine control |
| WO2009085005A1 (en) * | 2007-12-27 | 2009-07-09 | Vsm Group Ab | Sewing machine having a camera for forming images of a sewing area |
| CN109154118A (en) * | 2016-05-26 | 2019-01-04 | 宝金株式会社 | The coordinate of automatic detection sewing workpiece and the automatically controlled pattern sewing machine and its control method being programmed |
| DE102018207931A1 (en) * | 2018-05-18 | 2019-11-21 | Pfaff Industriesysteme Und Maschinen Gmbh | Method for regulating the position of a seam course relative to structures of a sewing material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094580B (en) * | 2022-07-01 | 2023-11-07 | 威海来威玩具有限公司 | Large-visual-angle automatic sewing machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004643A (en) * | 1977-08-25 | 1979-04-04 | Douwe Egberts Tabak Koffie The | Method and apparatus for inspecting and cutting cigar wrappers |
| GB2087107A (en) * | 1980-11-12 | 1982-05-19 | Unimation Inc | Manipulator welding apparatus with vision correction for workpiece sensing |
| GB2188170A (en) * | 1986-03-20 | 1987-09-23 | Gerber Garment Technology Inc | Method and apparatus for cutting parts from pieces of irregularly shaped and sized sheet material |
| US4748920A (en) * | 1985-10-05 | 1988-06-07 | Nahmaschinenfabrik Emil Stutznacker Gmbh & Co. Kg | Method for stitching along the contours of patterns deposited on two-dimensional elastic fabrics and apparatus to implement the method |
| EP0363178A1 (en) * | 1988-10-04 | 1990-04-11 | Cegelec Controls Ltd. | Sheet handling method and apparatus |
| GB2225652A (en) * | 1988-10-04 | 1990-06-06 | Gec Electrical Projects | Sewing fabric with undulating edge |
-
1989
- 1989-12-28 IL IL92916A patent/IL92916A0/en unknown
-
1990
- 1990-12-21 GB GB9027867A patent/GB2240193A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004643A (en) * | 1977-08-25 | 1979-04-04 | Douwe Egberts Tabak Koffie The | Method and apparatus for inspecting and cutting cigar wrappers |
| GB2087107A (en) * | 1980-11-12 | 1982-05-19 | Unimation Inc | Manipulator welding apparatus with vision correction for workpiece sensing |
| US4748920A (en) * | 1985-10-05 | 1988-06-07 | Nahmaschinenfabrik Emil Stutznacker Gmbh & Co. Kg | Method for stitching along the contours of patterns deposited on two-dimensional elastic fabrics and apparatus to implement the method |
| GB2188170A (en) * | 1986-03-20 | 1987-09-23 | Gerber Garment Technology Inc | Method and apparatus for cutting parts from pieces of irregularly shaped and sized sheet material |
| EP0363178A1 (en) * | 1988-10-04 | 1990-04-11 | Cegelec Controls Ltd. | Sheet handling method and apparatus |
| GB2225652A (en) * | 1988-10-04 | 1990-06-06 | Gec Electrical Projects | Sewing fabric with undulating edge |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679749A1 (en) * | 1991-10-15 | 1995-11-02 | Orisol Original Solutions Ltd. | Apparatus and method for preparation of a sewing program |
| WO1996023626A1 (en) * | 1995-01-31 | 1996-08-08 | British United Shoe Machinery Limited | Edge detection in automatic sewing apparatus |
| GB2317026A (en) * | 1996-09-09 | 1998-03-11 | Electrolux Ab | Embroidery machine control |
| GB2317026B (en) * | 1996-09-09 | 2000-06-21 | Electrolux Ab | Embroidery machine control |
| US6148247A (en) * | 1996-09-09 | 2000-11-14 | Viking Sewing Machines Ab | Embroidery machine control |
| WO2009085005A1 (en) * | 2007-12-27 | 2009-07-09 | Vsm Group Ab | Sewing machine having a camera for forming images of a sewing area |
| CN109154118A (en) * | 2016-05-26 | 2019-01-04 | 宝金株式会社 | The coordinate of automatic detection sewing workpiece and the automatically controlled pattern sewing machine and its control method being programmed |
| EP3467177A4 (en) * | 2016-05-26 | 2020-01-22 | BOGM.Co.,Ltd | Electronically controlled pattern sewing machine that automatically detects and programs coordinate of sewing object and method for controlling same |
| DE102018207931A1 (en) * | 2018-05-18 | 2019-11-21 | Pfaff Industriesysteme Und Maschinen Gmbh | Method for regulating the position of a seam course relative to structures of a sewing material |
| WO2019219296A1 (en) | 2018-05-18 | 2019-11-21 | Pfaff Industriesysteme Und Maschinen Gmbh | Method for controlling the position of a seam profile relative to structures of a sewing material |
| US11441253B2 (en) | 2018-05-18 | 2022-09-13 | Pfaff Industriesysteme Und Maschinen Gmbh | Method for controlling the position of a seam profile relative to structures of a sewing material |
Also Published As
| Publication number | Publication date |
|---|---|
| IL92916A0 (en) | 1990-09-17 |
| GB9027867D0 (en) | 1991-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |