US3821526A - Textile machines - Google Patents

Textile machines Download PDF

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Publication number
US3821526A
US3821526A US00267254A US26725472A US3821526A US 3821526 A US3821526 A US 3821526A US 00267254 A US00267254 A US 00267254A US 26725472 A US26725472 A US 26725472A US 3821526 A US3821526 A US 3821526A
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Prior art keywords
machine
combination according
logic unit
word
buffer storage
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English (en)
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J Anderson
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MIDLAND IND CO Ltd GB
MIDLAND IND COMPUTING
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MIDLAND IND COMPUTING
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    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/94—Driving-gear not otherwise provided for
    • D04B15/99—Driving-gear not otherwise provided for electrically controlled
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns
    • 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
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34367—Interrupts, different tasks foreground, midground, background
    • 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
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34388—Detect correct moment, position, advanced, delayed, then next command
    • 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
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35367—Only read buffer, advance tape while machining with data from read buffer
    • 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
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35373—Data storage, buffer
    • 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
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36498—Main and secondary program for repeating same operations
    • 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
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36569—Enter, punch only different, changed data, same not repeated in next block
    • 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
    • G05B2219/45196—Textile, embroidery, stitching machine

Definitions

  • ABSTRACT This invention concerns a stored program digital computer and a textile producing machine
  • the computer includes a fast random access store in which is stored information relating to the material to be produced by the machine and also a controlled program.
  • the computer also includes a logic unit which receives signals from the machine and acts upon receipt of such a signal as instructed hy the control program to supply fresh information for use by the machine.
  • FIGS. 1 A first figure.
  • the computer includes a fast random access store in which is stored information concerning the pattern and also a control program.
  • the computer also includes a logic unit which receives information from the machine and acts upon that information to supply fresh information to the machine as instructed by the control program.
  • Textile producing machines generally operate on a continuous basis and require information at specific times and at a relatively high rate of delivery. Consequently the computer must be able to supply information to the machine at a rate at least equal to the rate at which the machine demands the information. It is therefore desirable to minimise the number of cycles of computer operation which are necessary for the supply of a fresh set of information to the machine. Furthermore, it is desirable to reduce the amount of storage required to store information concerning the pattern.
  • the object of the present invention is to provide said combination in a simple and convenient form.
  • the combination in accordance with the invention comprises a stored program digital computer and a textile producing machine, the computer including a fast random access store in which is stored information relating to the material to be produced by the machine and a control program, the computer also including a logic unit which receives signals from the machine and acts upon receipt of such a signal as instructed by the control program to supply fresh information for use by the machine, and a counter which can be set to count said signals, the counter being utilised in such a manner that when part or the whole of the information required to be supplied to the machine is unchanged the computer does not supply the unchanged information for use by the machine.
  • the counter is constituted by an individually addressable portion of the fast random access store known as a word.
  • the counter is constituted by one or more stages separate from the fast random access store.
  • the counter is located intermediate the machine and the computer, the counter acting to prevent signals from the machine reaching the logic unit of the computer until a predetermined number of said signals as determined by the setting of the counter have been generated by the machine.
  • FIG. 1 shows a block diagram of one example of a textile producing machine and a stored program digital computer in accordance with the invention
  • FIG. 2 is similar to FIG. 1 but shows the parts of the computer in greater detail.
  • FIG. 3 shows in greater detail the buffer arrangement associated with the knitting machine
  • FIGS. 4, 5 and 6 show portions of a circular knitting machine
  • FIG. 7 shows in greater detail part of the combination shown in FIG. 3, and
  • FIG. 8 shows in diagrammatic form a system for connecting a stack of actuators to multiple hardware buffers.
  • a textile producing machine 10 which in the particular example is a circular knitting machine but which may be any type of textile machine.
  • the machine is provided with a plurality of electromechanically controlled actuators 11 which can be selectively energised to cause operation of the knitting machine in a particular way.
  • the supply of electrical energy to the actuators is controlled by means of a digital computer and the arrangement is such that the material produced by the machine may be provided with a particular pattern.
  • the pattern can be achieved by variation of the stitch, the type or colour of the yarn or thread used or a combination of these variables.
  • a power supply including fast acting switches supplies electrical energy to the actuators.
  • the switches are controlled by a hardware buffer 12.
  • the hardware buffer is in the form of an interface card which is plugged into a suitable socket inside the computer. Whilst the hardware buffer 12 controls the supply of electrical energy to the actuators II it also permits feedback of information to the computer from the knitting machine.
  • the digital computer includes a logic unit 13 and a fast random access memory 14 and as is conventional practice, information can be passed between the logic unit 13 and the memory 14 in either direction.
  • the hardware buffer 12 is connected to the logic unit 13 and information relating to the pattern and control signals relating to the operation of the hardware buffer pass between the logic unit and the hardware buffer and information regarding the state of the machine, between the hardware buffer and the logic unit.
  • the computer is also provided with an input unit 15 by which means a program of computer instructions and information relating to the pattern can be stored in the fast random access storage of the computer.
  • the input unit 15 is associated with the logic unit 13.
  • the stored program digital computer is shown in greater detail in FIG. 2 which uses the same reference numerals as FIG. 1.
  • the memory 14 is shown to incorporate a memory unit 18, a memory address register 19 and a memory data register 20.
  • the logic unit 13 is shown to incorporate the control unit 21, the instruction register 22, the program counter 23, the arithmetic unit 24, working registers 25, 26, the data switch 27 and the data highway 28.
  • the data switch 27 is connected to three buffers 12 which are connected in turn to two knitting machines and an input or input/output device 15 respectively.
  • Each buffer 12 comprises three sub buffers 30 each capable of receiving and storing 16 bits of information.
  • Each sub buffer 30 has 16 inputs, only two of which are shown, and the corresponding inputs of each sub buffer are connected to input lines 31 of which there are 16.
  • the input lines 31 are connected to the data highway 28 of the computer by way of the data switch 27 and it will therefore be seen that when the computer outputs information to the particular buffer 12 the same information is present at the inputs of each sub buffer 30.
  • the sub buffers 30 are set to store the information present at their inputs by means of signals applied by way of control lines 32.
  • Three control lines 32 are provided associated with the three sub buffers 30 respectively. At the appropriate time a signal is transmitted along one of these lines so that the associated sub buffer 30 stores the information at its input terminals. Three such computer operations are required to load the three sub buffers 30 with information.
  • Each sub buffer has l6 outputs and associated with the outputs respectively are drive circuits 33.
  • Each drive circuit 33 is associated with a power stage not shown, so as to provide sufficient current to drive the associated actuator 11 of the knitting machine.
  • the filling of the sub buffers 30 takes place in an extremely short period of time. Since the actuators are electromagnetic in nature with high intertia and do not require accurate timing, it is arranged that the outputs to the associated actuators 11 are energised immediately without further control signals from the knitting machine. These outputs may however be gated with an analogue or digital signal from the knitting machine to give the input signal required for a particular type of actuator. This mode of operation is contrary to normal computer practice where the sub buffers when filled with fresh information would only pass that information to an associated machine on receiving a control signal at some predetermined time.
  • each buffer 12 Also provided in each buffer 12 are lines 34, 35 along which information is passed from the knitting machine to the computer.
  • a signal on line 34 causes an interrupt of normal computer operation each time the knitting machine requires actuation or non-actuation and thereby causes the computer to alter the information contained in the sub buffers 30 thus affecting the actuators when appropriate.
  • the line 34 may include pulse shaping and delay circuits so that the interrupt of normal computer operation to change the information in the sub buffers occurs at the correct time. Such pulse shaping and delay circuits will be necessary if it is not possible to provide a sensor on the knitting machine suitably positioned to produce a signal at the appropriate time.
  • the line 34 may also include a counter 36 to be described, the purpose of which is to prevent an interrupt of normal computer operation until a predetermined number of signals have been generated by the sensor 80 of the knitting machine.
  • the counter is set manually but it will be appreciated that this counter could be set by the computer.
  • the effect of the counter 36 is that the knitting machine will carry out a predetermined number of stitch operations without any change occuring in the setting up of the actuators. So far as the knitted fabric is concerned the effect will generally be to stretch the pattern horizontally.
  • the interrupt signals are processed in the interrupt handling or Device Done" circuits of the buffer in the normal way.
  • the normal Device Busy circuits of the buffer are utilized to ensure that the computer and knitting machine are in step.
  • the line 35 provides a signal at a predetermined point in the cycle of operation of the knitting machine. A suitable time might be when needle one is adjacent to feed one, the beginning of a new course, or at the end of the old course.
  • the signal is passed to the Device Busy circuits of the buffer and sets the Device Busy bistable. It is arranged that the Device Busy bistable is only examined by the computer as instructed by the stored program of computer instructions at the time when the computer expects the signal.
  • the computer carries on providing fresh information to the sub buffers 30. If however the signal from the knitting machine is not present when the Device Busy circuits are activated then the computer stops providing fresh information to the sub buffers and only starts supplying fresh information when the next signal from the knitting machine occurs on line 35 and the knitting machine and computer are back in step. This will mean that the knitting machine will carry on knitting without change in the setting of the actuators and therefore a fault in the pattern produced by the machine will occur. However the fault should not last for more than one rotation of the knitting machine.
  • the counter 36 comprises a four bit decremental counter unit 37 the outputs from the individual stages of which are connected to a NOR gate 38.
  • the stages of the counter are interconnected in the usual manner and the line 34 from the textile producing machine is connected to the first stage of the counter unit 37 whilst the output of the NOR gate 38 is connected to the Device Done circuits of the buffer.
  • the stages are initially set and the signals arriving from the knitting machine cause the counter unit to count down to zero. When this occurs there are no input signals to the NOR gate so that an output signal is supplied to the Device Done circuits of the buffer.
  • switches 39 are provided and these are associated with the counter stages respectively, there being interposed between the stages and the switches, AND gates 40 respectively.
  • the outputs of the AND gates are connected to the resetting terminals of the stages respectively and the one set of input terminals of the AND gates is connected to the switches respectively whilst the other inputs are connected to a reset line 41.
  • the switches 39 are set in binary code and when a reset signal is applied to line 40 the individual stages of the counter unit will be reset.
  • line 41 is provided with a reset signal each time a signal appears at the output of the NOR gate 38 so that the counter stages are automatically reset.
  • the switches 39 are manually operable switches but as mentioned earlier these switches can be set by the computer provided a suitable instruction is inserted in the control program and appropriate information is inserted in the fast random access store.
  • This example chosen is a circular knitting machine having two sets of needles.
  • One set of needles is mounted in vertical grooves respectively on the outside of a needle cylinder having its longitudinal axis vertical.
  • the needle cylinder is surrounded by an annular cam box.
  • the cam box is stationary while the needle cylinder rotates to provide relative motion between the cams and the needles.
  • Cam parts are mounted on the internal peripheral wall of the cam box to form passages which may receive butts formed on the needles or on jacks associated with the needles.
  • Thread guides each of which feeds one thread to the needles. In the vicinity of each thread guide the cam parts are shaped to impart movement to any butt which engages the cam parts and thus the needle associated with that butt.
  • This example of a circular knitting machine employs latch needles. Upward movement of a needle will result in the collection of a thread in the hook of the needle. Full upward movement of a needle will result in a loop positioned on the latch of the needle being displaced over the end of the latch whereas part upward movement of a needle will not. When the needle is moved down after a full upward movement the latch will be closed and the loop will be knocked over" leaving the newly inserted thread in the closed hook of the needle and thus forming a stitch. In the case where a part upward movement of the needle occurs the loop remains on the latch and cannot therefore close the latch and be knocked over during the subsequent downward movement. This eventually results in the formation of a tuck" stitch.
  • the needle When the needle is retained in its downward position at a thread feed the needle will miss the thread and the thread will be laid in the knitted fabric.
  • the extent of the upward movement is determined by the cam engaged by the butt. In the example there is only one cam for causing needles to knit at each thread feed but it will be appreciated that there may be a cam for tucking and a cam for knitting or means for altering one cam to fulfil either purpose.
  • the aforesaid cam parts co-operate with selected butts.
  • Some form of selector operated by the actuator is used to determine whether the butt is in a cam engaging position in which case the cam will move the needle to effect a stitch. or whether the butt is held in a position in which it will be clear of the cams so that the needle will remain in the miss or retracted position.
  • a selector is provided for each needle and a single actuator may operate each of the selectors in turn.
  • Such an arrangement may impose limitations on the speed of operation of the machine. It is therefore known to provide a stack of actuators at each thread feed.
  • the actuators in a stack are generally mounted directly above one another and operate at a single needle position but it will be appreciated that other arrangements are possible.
  • Each actuator controls the operation of all those needles associated with selector butts at a certain height. These needles are spaced at equal intervals round the needle cylinder so that the associated actuator has as much time as possible for its operation.
  • a rotary needle cylinder 60 in the outer peripheral surface of which is formed a plurality of axially extending circumferentially spaced grooves.
  • latch needles 61 respectively each having a butt 62 which co-operates with cams formed on the internal periphery of an annular cam box 63 surrounding the needle cylinder.
  • jacks 64 are also accommodated within the aforesaid grooves.
  • Each jack has a shoulder for engagement with the associated needle and the lower portion of the jack is capable of flexure.
  • At the lower end of the jack is a butt 65 and in the retracted position of the jack as shown in FIG.
  • the butt 65 is held clear of cams 66 which are mounted on a lower portion 67 of the cam box.
  • the cams 66 are provided for raising the jack 64 and hence the needle 6] and a set of such earns 66 is provided at each thread feed position around the needle cylinder. If the jack is not in the retracted position the butt 65 will engage with the cams as the needle cylinder 60 ro tates and be raised thereby lifting the needle.
  • the cams on the cam box 63 are shaped to permit raising of the needle at the thread feed position and act when the needle has passed the thread feed position to lower the needle and the associated jack.
  • each jack 64 Associated with each jack 64 is a selector or presser 68 and this is pivotally mounted upon a part 69 carried by the needle cylinder 60.
  • the lower end of the presser is positioned to engage with the bowed portion of the jack 64 and the upper end of the presser defines an upstanding butt 70.
  • the butt 70 co-operates with a fixed cam 71 which is positioned in advance of the cam 66 and is arranged to urge the butts 70 outwardly away from the needle cylinder. During such outward movement the butt is brought into close proximity with a fixed magnet 72 and is attracted and retained by the magnet against the force exerted by the resilience of the lower portion of the jack.
  • the outward movement of the butt 70 effects inward movement of the butt 65 to the retracted position.
  • the magnet 72 extends circumferentially as shown in FIG. 5 and overlaps the cam 66 so that as long as the butt 70 is retained by the magnet the butt 65 will not be activated by the cam 66.
  • Each presser 68 is initially provided on the outer side of its upper portion with a plurality of spaced selector butts but all except one of these butts is broken off when the presser is assembled into the machine to provide a single selector butt 73 at a particular height. As shown each presser was initially provided with six selector butts and adjacent pressers are arranged to have the selector butts at different positions. The selector butts 73 for convenience are arranged in sequence so that every seventh presser has the selector butt at the same height.
  • the fingers 74 For co-operation with the selector butts 73 of the pressers 68 there are provided six operating members in the form of fingers 74 and these extend from a stacked actuator 75.
  • the fingers are at heights corresponding to the various selector butts 73 but they can be tilted about horizontal axes into and out of exact registration with the selector butts 73.
  • the ends of the fingers 74 adjacent to the pressers define cam forms and the arrangement is such that when the finger is in a position to contact a selector butt 73 the presser carrying that butt will be moved inwardly towards the needle cylinder thereby moving the presser away from the magnet 72. When this occurs the resilience of the lower portion of the jack will move the butt 65 into the path of the cam 66.
  • each finger 74 is pivotally mounted on a part of the stacked actuator 75, about a substantially horizontal axis and each finger has associated therewith an extension or armature 76.
  • the armatures extend through annular electromagnets 77 respectively the current flow through which can be reversed when required so that the magnetic polarity of the end of the armature remote from the pivot can be reversed.
  • the end of the armature 76 extends between a pair of pole pieces 78 and these are polarized by a permanent magnet 79. In use therefore the position of the armatures 76 will depend upon the direction of current flow through the associated electromagnets 77 and by suitably controlling the direction of current flow needles may be selected and raised.
  • a dial 600 in the form of a horizontal disc with grooves extending radially from its centre is also provided.
  • the second set of needles is mounted in these grooves and co-operates with the first set of needles to produce patterned fabric.
  • the operation of the second set of needles is generally controlled mechanically but it will be appreciated that it is possible to select the dial needles by means of electromechanical actuators.
  • the invention is not limited in its application to a circular knitting machine nor to the production of a pattern in material by colour variation and may be applied to any form of textile producing machine where it is desired to produce a pattern with visual variation, variation in surface texture, variation in surface level, etc., of the material.
  • Table 1 shows at the desired arrangement of face stitches in a portion of a course of fabric to be knitted by the circular knitting machine previously described.
  • the letters A, B, C and D represent single face stitches of the different colours A, B, C and D.
  • the course shown is only part of a course and the table shows by the numeral one (1) when an actuator is operated and by zero (0) when an actuator is not operated.
  • the gaps in the table are left because it is desired to illustrate only the knitting of the portion of the course shown at 20.
  • T and T all the actuators are operated and this is due to the particular arrangement of actuators, colours and face stitches chosen. From the table it can be seen that output to the hardware buffer must take place at times T T T3, T T T T T T T T T T T and that 32 bits of information need to be stored and delivered to the knitting machine to produce the eight face stitches.
  • the information placed in the buffer for the actuator responsible for colour A at times T T T and T is allowed to remain at times T T, T and T
  • the information placed in the buffer for the actuator responsible for colour B at times T T T and T is allowed to remain at times T T T and T
  • the information placed in the buffer for the actuator responsible for colour C at times T T T and T is allowed to remain at times T T T and T
  • the information placed in the buffer for the actuator responsible for colour D at times T T T and T is allowed to remain at times T T T and T Consequently the signals from the machine at the even numbered times T T T T T T and T are ignored by use of a counter and the processing involved for the outputs at these times avoided.
  • the counter is provided by a uniquely addressable portion of the fast random access store of the computer called a word.
  • the following stored program of computer instructions increments, tests and resets this counter and ignores those interrupts from the textile producing machine which do not require a change in the output, thereby reducing the processing time required for the supply of information to that machine and possibly allowing multiple machines to be controlled by the computer in place of that machine.
  • a further feature of the invention allows the stored program digital computer to keep in step with the textile producing machine by the use of a needle position 3,821,526 9 l0 counter in conjunction with the counter and the sensor divide the number of needles in the cylinder without already described. it should be noted however that the remainder. Otherwise the computer and the machine multiple in which the stitches occur in the sets should cannot be kept in step.
  • Stor e words can be pro ided to hold as many output hits as are required. It should be noted that the initial values in the output words allow an imme late interrupt at the start of operation.
  • the program for a particular textile machine is stored after the interrupt locations.
  • NEWL N0 operation This location holds the return address increment memory and then (1i increment and test the machine 1 counter 3 skip the next instruction if the result is zero.
  • the computer says it is the beginning of a new rotation.
  • NEWLB Restore the B register 2 N EXIT Set and clear the control his- N Set and clear the appropriate bistables on channel N to allow the next inter- 2 tables.
  • This instruction does not alter the steady state output from sub u or Jump to the address in NEWL Exit from the interrupt subroutine 3
  • the computer but not the hardware says it is the beginning oi a rotation.
  • the computer is out oi step with the textile machine so make the computer wait for the textile machine.
  • HOLD Cigar apt then complement the Set the i3 register to minus one reg s or.
  • the machine 1 counter takes the form of a program instruction for convenience.
  • the program modification requires the following storage.
  • a circular knitting machine may have one actuator lect or not select several successive needles. at each thread feed. These actuators are able to operate 10
  • the machine the hardware buffer may comprise a number of hardmay make use of the stacked actuator system in were output buffers equal to the number of actuators which several actuators are positioned at each thread i 5 in a stack and in this case each actuator of the stack is feed, successive actuators at that thread feed causing connected to one of the buffers.
  • each of the stacks of actuators is an electrical sigthe commands placed in a number of successive buffers nal memory system which can store the command sig- 25 for a stacked actuator are the same so that a number nal output by the computer so that the actuators of the of successive needles are caused to select or not select stack are caused to operate in sequence at the approby that stack of actuators.
  • a timing signal device associated with The following program modification further illuseach actuator.
  • the device includes a distributor to distrates this method when the spacing of the actuators in tribute signals to the individual memories at the appro- 3" terms of a number of needles is not a multiple of the priate time. Consequently if the signals are maintained number of stitches in a set. It will however be apprecifor a period the distributor will distribute each signal to ated that the spacing of the actuators may be a multiple several memories and the associated actuators will sc- 0f the number of stitches in a set.
  • the interrupt routine for stacked actuators is the interrupt routine for stacked actuators.
  • NEWL No operation Store the B register in. NEWLIL. Jump to BBETI This initial value forces the use of the first bufler tor the first output It should be noted that in this example of an interrupt routine for stacked actuators the same software bufiers always fill the same hardware buflers BSETI Load theBregisterwith QiU'I11 Bufler setl 2 Output the B register to. N Output 16 bits in parallel to sub bufl'er N. 2
  • Jum CVlM BSE'Ia Loa the B register with mu'rsi Hufiei set a OutputtheBregisterto l Outputlsbitsin paralleltosubbufler
  • Output the B register to R Output 16 bits in parallel to sub butler R l r r Thcse actions may be repeated for as many output words or bits as are required.
  • t is Output 16 bits in parallel to sub buifer S
  • tents of the address in- Stgre the A register at the ad- STP Store the newly assembled output- 3 ress n- Increment memory and than PTR2 PTR2 points to the next portion of the pattern to be output for these actu- 3 skip the next instruction it the ators. result is zero.
  • Jumpt/osubroutina... NEXT. y g g 2 Store the A register in STP a 2 Jump to WAIT 2 NEXT No operation This locat holds the return add Increment the A register .r Select the next output butler l 2 Compare the A register with" END Test for the and of the butters. 2 Load the A register with INI'Il Start again at the first bullet.
  • the combination comprising a textile producing machine including at least one actuator means for de termining the production of the material and also means for producing signals indicating the state of the machine, a stored program digital computer including random access storage means in which is stored information relating to the control of the actuator means to determine the material to be produced by the machine and also a control program, buffer storage means for receiving information supplied by the computer, storing the information and supplying it to said actuator means, first means to count said signals from said machine and settable to select a said signal, the computer acting in response to a said selected signal as instructed by the control program to supply information to said buffer storage means for use by the machine.
  • the computer includes a logic unit means and said first counter means is disposed intermediate the machine and the logic unit means, said first counter means receiving said signals from the machine, determining which of said signals is to be selected and passing said selected signals to said logic unit means, said logic unit means initiating the supply of information to said buffer storage means.
  • said computer includes logic unit means which receive said signals from the machine and said first counter means includes a first portion of said control program which is executed in response to said signals received from the machine, said first portion of said control program acting to initiate the supply of information by said logic unit means to said buffer storage means.
  • said logic unit means counts said signals received from said machine as instructed by said first portion of said control program and initiates the supply of information as instructed by said first portion of said control program upon counting a predetermined number of said signals.
  • the first counter means includes a first word comprising an individually addressable portion of the random access store, said first word storing the current value of the first counter means.
  • the first counter means includes a first word comprising an individually addressable portion of the random access store, said first word storing the current value of the first counter means.
  • the first counter means includes a second word of the random access store which stores the value to which said first word may be reset by the logic unit means as instructed by said first portion of the control program.
  • the first counter means includes a second word of the random access store which stores the value to which said first word may be reset by the logic unit means as instructed by said first portion of the control program.
  • second counter means including a second portion of said control program having an individually addressable third word of the random access store, said second counter means being responsive to said signals received from the machine, the logic unit means counting the value of said third word as instructed by said second portion of said control program, said second counter means controlling the logic unit means to determine the type of information to be supplied to said buffer storage means.
  • second counter means including a second portion of said control program having an individually addressable third word of the random access store, said second counter means being responsive to said signals received from the machine, the logic unit means counting the value of said third word as instructed by the second portion of said control program, said second counter means controlling the logic unit means to determine the type of information to be supplied to said buffer storage means.
  • second counter means including a second portion of said control program having an individually addressable third word of the random access store, said second counter means being responsive to said signals received from the machine, the logic unit means counting the value of said third word as instructed by the second portion of said control program, said second counter means controlling the logic unit means to determine the type of information to be supplied to said bufier storage means.
  • a textile producing machine including at least one actuator means for determining the production of the textile material and also means for producing signals indicating the state of the machine
  • a stored program digital computer including random access storage means in which is stored information relating to the control of the actuator means to determine the material to be produced by the machine and also a control program
  • said computer also including a logic unit means which receives said signals from the machine, first counter means including a first portion of said control program having an individually addressable first word of the random access store, said first counter means being responsive to said signals received from the machine, the logic unit means counting the value of said first word as instructed by the first portion of said control program, second counter means including a second portion of said control program having an individually addressable third word of the random access store, said second counter means being responsive to said signals received from the machine, the
  • logic unit means counting the value of said third word as instructed by the second portion of said control program, buffer storage means for receiving information from the logic unit means, storing the information and supplying it to said actuator means, said first counter means controlling the logic unit means to supply information to said buffer storage means when said first counter means has reached a predetermined value and said second counter means controlling the logic unit means to determine the type of information to be supplied to said buffer storage means.
  • the machine includes further means for producing a further signal indicating a predetermined step in the cycle of operation of the machine, the logic unit as instructed by the control program checking the receipt of said further signal against the value of said third word and changing said value if necessary to the value expected on receipt of said further signal to keep the computer in step with the machine.
  • the combination comprising a circular knitting machine including a plurality of needles, at least one actuator means for controlling the operation of the needles to produce textile material comprising groups of stitch formation, each group comprising a predetermined number, n, of identical stitch formations arranged in a course, said number, n, being divisible into the number of needles in the machine without remainder, said machine also having means for producing signals indicating the state of the machine, a stored program digital computer including random access storage means in which is stored information relating to the control of the actuator means to determine the material to be produced by the machine and also a control program, said computer also including a logic unit means which receives said signals from the machine, first counter means including a first portion of said control program having an individually addressable first word of the random access store, said first counter means being responsive to said signals received from the machine, the logic unit means counting the value of said first word as instructed by the first portion of said control program, buffer storage means for receiving information from the logic unit means, storing the information and supplying it to said actuator means, said first counter
  • a circular knitting machine including a plurality of needles, at least one actuator means for controlling the operation of the needles to produce a textile material comprising groups of stitch formations, each group comprising a predetermined number, n, of identical stitch formations arranged in a course, said number, n, being divisible into the number of needles of the machine without remainder, said machine also having means for producing signals indicating the state of the machine, a stored pro gram digital computer including random access storage means in which is stored information relating to the control of the actuator means to determine the material to be produced by the machine and also a control program, said computer also including a logic unit means which receives said signals from the machine, first counter means including a first portion of said control program having an individually addressable first word of the random access store, said first counter means being responsive to said signals received from the machine, the logic unit means counting the value of said first word as instructed by the first portion of said control program, buffer storage means for receiving information from the logic unit means, storing the information and supplying it to said actuator
  • each of the actuator means in a stack lies vertically above and/or below the remaining actuator means in the stack.
  • each of the actuator means in a stack lies vertically above and/or below the remaining actuator means in the stack.
  • each of the actuator means in a stack lies vertically above and/or below the remaining actuator means in the stack.
  • each of the actuator means in a stack lies vertically above and/or below the remaining actuator means in the stack.
  • each of the actuator means in a stack lies vertically above and/or below the remaining actuator means in the stack.
  • the random access storage means includes software buffer storage means in which data to be supplied to the buffer storage means associated with said actuator means is stored.
  • the random access storage means includes software buffer storage means in which data to be supplied to the buffer storage means associated with said actuator means is stored.
  • the random access storage means includes software buffer storage means in which data to be supplied to the bufi'er storage means associated with said actuator .means is stored.
  • the random access storage means includes software buffer storage means in which data to be supplied to the buffer storage means associated with said actuator means is stored.
  • the random access storage means includes software buffer storage means in which data to be supplied to the buffer storage means associated with said actuator means is stored.
  • each software buffer storage means is uniquely associated with one buffer storage means associated with said actuator means.
  • each software buffer storage means is uniquely associated with one buffer storage means associated with said actuator means.
  • each software buffer storage means is uniquely associated with one buffer storage means associated with said actuator means.
  • each software buffer storage means is uniquely associated with one buffer storage means associated with said actuator means.
  • each software buffer storage means is uniquely associated with one buffer storage means associated with said actuator means.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Knitting Machines (AREA)
US00267254A 1971-06-29 1972-06-28 Textile machines Expired - Lifetime US3821526A (en)

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Application Number Priority Date Filing Date Title
GB3032271 1971-06-29
GB4875871 1971-10-20

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US3821526A true US3821526A (en) 1974-06-28

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US00267254A Expired - Lifetime US3821526A (en) 1971-06-29 1972-06-28 Textile machines
US00267260A Expired - Lifetime US3825900A (en) 1971-06-29 1972-06-28 Textile machines
US00267257A Expired - Lifetime US3851315A (en) 1971-06-29 1972-06-28 Textile machines

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US00267260A Expired - Lifetime US3825900A (en) 1971-06-29 1972-06-28 Textile machines
US00267257A Expired - Lifetime US3851315A (en) 1971-06-29 1972-06-28 Textile machines

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US (3) US3821526A (enExample)
CA (1) CA967667A (enExample)
DE (3) DE2231823A1 (enExample)
FR (3) FR2143906A1 (enExample)
IT (3) IT958645B (enExample)

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US5107689A (en) * 1989-03-24 1992-04-28 Sipra Patententwicklungs-U.Beteiligungsgesellschaft Mbh Device for switching on and off at least one functional unit of a knitting machine

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US4328556A (en) * 1975-09-09 1982-05-04 Tokyo Denryoku Kabushiki Kaisha Control system of plants by means of electronic computers
US4007607A (en) * 1975-10-09 1977-02-15 Hayes-Albion Corporation Method and apparatus for knitting patterned sliver high pile fabric
US4034354A (en) * 1975-11-21 1977-07-05 The Bendix Corporation Programmable interface controller for numerical machine systems
US5107689A (en) * 1989-03-24 1992-04-28 Sipra Patententwicklungs-U.Beteiligungsgesellschaft Mbh Device for switching on and off at least one functional unit of a knitting machine

Also Published As

Publication number Publication date
CA967667A (en) 1975-05-13
US3851315A (en) 1974-11-26
FR2143906A1 (enExample) 1973-02-09
DE2231823A1 (de) 1973-01-18
IT958646B (it) 1973-10-30
US3825900A (en) 1974-07-23
FR2143903A1 (enExample) 1973-02-09
IT965865B (it) 1974-02-11
FR2143907A1 (enExample) 1973-02-09
IT958645B (it) 1973-10-30
DE2231894A1 (de) 1973-01-18
DE2231751A1 (de) 1973-01-18

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