CN111549442A - Zero waste yarn end-starting control method of full-automatic computerized flat knitting machine - Google Patents
Zero waste yarn end-starting control method of full-automatic computerized flat knitting machine Download PDFInfo
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- CN111549442A CN111549442A CN202010210937.7A CN202010210937A CN111549442A CN 111549442 A CN111549442 A CN 111549442A CN 202010210937 A CN202010210937 A CN 202010210937A CN 111549442 A CN111549442 A CN 111549442A
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- 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
- D04B15/88—Take-up or draw-off devices for knitting products
- D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines
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- 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
- D04B15/96—Driving-gear not otherwise provided for in flat-bed knitting machines
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- 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
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Abstract
The invention discloses a zero waste yarn bottom lifting control method of a full-automatic computerized flat knitting machine, which comprises the following steps: A10) confirming that the computerized flat knitting machine is in a reset zero state; A20) the bottom lifting plate is lifted to the upper part of the needle plate through the bottom lifting motor, and the first line of yarns for weaving the clothes are respectively limited and penetrate through the needle tooth interval of the bottom lifting plate; A30) limiting a steel wire to penetrate through needle holes of the bottom lifting needles through a steel wire motor, and providing traction force for the first row of yarns through the steel wire; A40) the machine head weaves the first line of yarns according to the weaving pattern requirement, and in the weaving process, the position of the bottom lifting plate is lowered and adjusted by the bottom lifting motor until the position is lowered to be below the interval between the front roller and the rear roller; A50) the roller opening and closing motor ensures the closed state of the front roller and the rear roller, provides a traction effect for the woven clothes, and completes zero waste yarn bottoming control; the invention realizes the zero waste yarn bottoming control of the woven clothes, and has simple, convenient, stable and reliable control process.
Description
Technical Field
The invention relates to a control technology of a full-automatic computerized flat knitting machine, in particular to a zero waste yarn starting control method of the full-automatic computerized flat knitting machine.
Background
The working principle of the full-automatic computerized flat knitting machine is that a pattern file is designed through control software to achieve mechanical equipment for automatically knitting clothes, and the roller is a core structure which is used for drawing a garment piece in the fabric knitting process of the full-automatic computerized flat knitting machine so as to achieve the knitting effect and realize the knitting function. The step of knitting the bottom is that a distance is reserved between a fabric needle plate and a roller of the computerized flat knitting machine, so that the knitted clothes need to be ensured to obtain the roller drawing effect from the beginning of knitting in order to realize the expected pattern of the knitted clothes.
In order to solve the problem, the prior art generally uses waste yarn to perform knitting filling between the starting knitting position of the needle plate and the traction action provided by the roller to the knitted clothes, and the knitting pattern effect of the knitted clothes cannot be influenced by filling the waste yarn due to the uncontrollable traction force at the distance end. However, the bottom-lifting knitting mode filled with waste yarns can cause that a section of waste yarn bottom-lifting fabric is arranged below each piece of knitting fabric, the waste yarns are manually removed one by one in the later period, and a large yarn removing workload is consumed, so that the cost expenditure which cannot be ignored in the textile industry is already reached.
In order to solve the problems, some lifting and lowering technologies have been developed, and the working idea is to combine a lifting plate and a crochet hook, and the crochet hook pulls the waste yarn to provide the traction force required for knitting, but the crochet hook has great damage to the yarn, and the crochet hook cannot directly pull the crochet hook to obtain the finished fabric with the target knitting pattern, and also needs to directly add several lines of waste yarn on the crochet hook and the finished fabric. To achieve zero waste yarn set-up, the invention patent publication No. CN110552111A discloses a method for setting-up a knitted fabric without waste yarn, which uses a flat knitting machine equipped with an automatic threading plate and having a front needle bed and a back needle bed opposite to each other, and first uses the main yarn set-up of the formal fabric piece to knit one line, and then knits one line or two lines of a cylinder, two lines being one line of the front and back needle beds, and then starts to set-up and draw the fabric piece by using the automatic threading plate, thereby forming a knitted fabric without waste yarn. Although the method realizes the bottoming without waste yarn, the flat knitting machine with the front needle bed and the back needle bed needs to be limited, the application range is limited, meanwhile, the control system needs to carry out bottoming control on the front needle bed and the back needle bed, and the control difficulty is large.
Therefore, the applicant determines to provide a zero waste yarn starting control method which can be widely applied to the full-automatic computerized flat knitting machine based on years of research and development experience and theoretical level of the computerized flat knitting machine.
Disclosure of Invention
In view of this, the invention aims to provide a zero waste yarn end-starting control method for a full-automatic computerized flat knitting machine, which realizes zero waste yarn end-starting control of woven clothes and has the advantages of simple, convenient, stable and reliable control process.
The technical scheme adopted by the invention is as follows:
the invention firstly provides a zero waste yarn bottom lifting control structure of a full-automatic computerized flat knitting machine, the full-automatic computerized flat knitting machine comprises a needle plate, a front roller and a rear roller which are arranged in parallel are arranged below the needle plate, the front roller and the rear roller are used for providing a traction effect for knitting clothes through relative rotation, the front roller and the rear roller can realize the switching of the interval opening and closing state under the driving effect of a roller opening and closing motor, the zero waste yarn bottom lifting control structure comprises a bottom lifting plate which is driven by the bottom lifting motor and is arranged between mounting frames at two sides of the full-automatic computerized flat knitting machine and a steel wire motor for selectively feeding and collecting wires, a plurality of bottom lifting needles are arranged on the bottom lifting plate in a row shape at intervals, a needle tooth interval for limiting and penetrating through the yarns is formed between every two adjacent bottom lifting needles, and the upper end part of each bottom lifting needle is provided with a needle hole for limiting and penetrating through the steel wire, the penetrating direction of the steel wire in the needle hole is vertical to the penetrating direction of the yarn in the needle tooth interval.
Preferably, the priming needle comprises a priming needle inserting part at the lower end part and a needle hole at the upper end part, and a needle tooth is integrally connected between the priming needle inserting part and the needle hole, wherein,
the upper end part of the bottom lifting plate is provided with a plurality of slots which are arranged in a row at intervals, and the bottom lifting pin insertion parts are fixedly inserted in the slots; and a needle tooth interval for limiting the penetrating yarn is formed between every two adjacent needle teeth.
Preferably, the outer diameter of the steel wire ranges from 0.5 mm to 0.8mm, and the pore diameter of the pinholes ranges from 1 mm to 1.5 mm.
Preferably, the roller opening and closing motor, the bottom lifting motor and the steel wire motor are respectively provided with a roller driving chip, a bottom lifting driving chip and a steel wire driving chip for driving control, and driving signals of the roller driving chip, the bottom lifting driving chip and the steel wire driving chip are all output by a main control chip of an MCU (micro control unit) of the full-automatic computerized flat knitting machine; further preferably, the driving signal includes a motor speed signal and a motor steering signal.
Preferably, the MCU control main chip adopts an STM32F103VC chip, and the roller driving chip, the bottom lifting driving chip and the steel wire driving chip all adopt DRV8711DCP driving chips.
Preferably, the MCU control main chip is in communication connection with the roller driving chip, the bottom lifting driving chip and the steel wire driving chip in a bus mode.
Preferably, install on the mounting bracket and be used for the wire reel of establishing the steel wire around, simultaneously the wire reel is located steel wire motor one side.
On the basis of the zero waste yarn end-starting control structure, the invention provides a zero waste yarn end-starting control method of a full-automatic computerized flat knitting machine, the zero waste yarn end-starting control method adopts a MCU control main chip of the full-automatic computerized flat knitting machine to control, and the control process comprises the following steps:
A10) and confirming that the full-automatic computerized flat knitting machine is in a reset-to-zero state, wherein the reset-to-zero state refers to: the front roller and the rear roller are in an interval opening state, the steel wire is in a winding state, and the bottom lifting plate is positioned below the front roller and the rear roller and serves as an initial return-to-zero position;
A20) the bottom lifting plate is lifted to the position above the needle plate through the bottom lifting motor, and the first line of yarns for weaving the clothes are respectively limited and penetrate through the needle tooth intervals of the bottom lifting plate;
A30) limiting a steel wire to penetrate through needle holes of the bottom lifting needles through the steel wire motor, and providing traction force for the first row of yarns through the steel wire;
A40) the machine head weaves the first line of yarns according to the weaving pattern requirement, and in the weaving process, the position of the bottom lifting plate is lowered and adjusted by a bottom lifting motor until the position is lowered to the position below the interval between the front roller and the rear roller;
A50) the roller opening and closing motor ensures that the front roller and the rear roller enter a closed state, and the front roller and the rear roller provide a traction effect for weaving clothes, so that zero waste yarn bottom-playing control is completed, and normal weaving control operation is entered.
Preferably, after the step a50), a step a60) is further included:
after the steel wires are completely drawn out of the needle holes of the bottom lifting needles by the steel wire motor, the steel wires are wound, and meanwhile, the bottom lifting plate is lowered to the initial return-to-zero position by the bottom lifting motor.
Preferably, the output torque of the steel wire motor is 0.4-0.6NM, and the bottom lifting motor is 2.2-2.5 NM.
Preferably, the DRV8711DCP driving chip calculates an output phase current pulse signal according to the received corresponding driving signal.
Preferably, an H-bridge driving circuit is respectively arranged between the DRV8711DCP driving chip and the corresponding motor, an input signal of the H-bridge driving circuit is a phase current pulse signal output by a pin of the DRV8711DCP driving chip, and an output signal of the H-bridge driving circuit is a motor phase current corresponding thereto, and is used for driving the corresponding motor to operate.
The invention also particularly and preferably provides a bottoming lifting motor driving circuit for bottoming zero waste yarn, wherein a first H-bridge driving circuit is arranged between the bottoming lifting driving chip and the bottoming lifting motor, an input signal of the first H-bridge driving circuit is a phase current pulse signal output by the bottoming lifting driving chip, and an output signal of the first H-bridge driving circuit is a phase current of the bottoming lifting motor and is used for driving the bottoming lifting motor to run; a second H-bridge driving circuit is arranged between the steel wire driving chip and the steel wire motor, an input signal of the second H-bridge driving circuit is a phase current pulse signal output by the steel wire driving chip, and an output signal of the second H-bridge driving circuit is a phase current of the steel wire motor and is used for driving the steel wire motor to run;
the first H-bridge driving circuit and the second H-bridge driving circuit respectively comprise an A-phase current H-bridge driving circuit and a B-phase current H-bridge driving circuit, the A-phase current H-bridge driving circuit comprises a first MOS switching tube, a second MOS switching tube, a third MOS switching tube and a fourth MOS switching tube, the source electrode of the first MOS switching tube is connected with the drain electrode of the second MOS switching tube, and the connection point between the source electrode of the first MOS switching tube and the drain electrode of the second MOS switching tube is connected with an A-phase current positive pulse signal and outputs a motor A-phase positive current corresponding to the A-phase current positive pulse signal; the source electrode of the third MOS switch tube is connected with the drain electrode of the fourth MOS switch tube, and a connection point between the source electrode of the third MOS switch tube and the drain electrode of the fourth MOS switch tube is connected with an A-phase current negative pulse signal and outputs a motor A-phase negative current corresponding to the A-phase current negative pulse signal;
the B-phase current H-bridge driving circuit comprises a fifth MOS switching tube, a sixth MOS switching tube, a seventh MOS switching tube and an eighth MOS switching tube, wherein the source electrode of the fifth MOS switching tube is connected with the drain electrode of the sixth MOS switching tube, and a connection point between the source electrode of the fifth MOS switching tube and the drain electrode of the sixth MOS switching tube is connected with a B-phase current positive pulse signal and outputs a corresponding motor B-phase positive current; and the source electrode of the seventh MOS switch tube is connected with the drain electrode of the eighth MOS switch tube, and a connection point between the source electrode of the seventh MOS switch tube and the drain electrode of the eighth MOS switch tube is connected with a phase-B current negative pulse signal and outputs a corresponding phase-B current of the motor.
Preferably, the gate of each MOS switch tube is connected to a PWM driving signal output by a pin of the corresponding driving chip, the drain of the first MOS switch tube, the drain of the third MOS switch tube, the drain of the fifth MOS switch tube, and the drain of the seventh MOS switch tube are connected to a 48V driving power supply, and the source of the second MOS switch tube, the source of the fourth MOS switch tube, the source of the sixth MOS switch tube, and the source of the eighth MOS switch tube are grounded through a current sampling resistor.
Preferably, the gate of each MOS switch tube is connected in series with a current limiting resistor, and a pull-down resistor for protection is connected between the gate of each MOS switch tube and the source thereof.
Preferably, the motor a phase negative current and the motor B phase negative current are respectively connected to the interface sockets of the corresponding motors.
Particularly preferably, a third H-bridge driving circuit is arranged between the roller driving chip and the roller opening and closing motor, and the structure of the third H-bridge driving circuit is the same as that of the first H-bridge driving circuit.
The invention sets zero waste yarn bottom control structure on the full-automatic computerized flat knitting machine, which mainly comprises: the invention relates to a bottom lifting device for a full-automatic computerized flat knitting machine, which comprises a bottom lifting motor, a bottom lifting plate and a steel wire motor, wherein the bottom lifting motor is used for lifting the bottom lifting plate, the bottom lifting plate and the steel wire motor are used for selectively feeding and collecting wires of steel wires, a plurality of bottom lifting needles are arranged on the bottom lifting plate at intervals in a row shape, a needle tooth interval for limiting penetrating yarns is formed between every two adjacent bottom lifting needles, and needle holes for limiting penetrating the steel wires are arranged at the upper end parts of the bottom lifting needles, the zero waste yarn bottom lifting control structure provided by the invention can completely replace a roller to provide a flexible and reliable traction effect for woven clothes during bottom lifting, any waste yarn is not needed to be filled for bottom lifting, the real zero waste yarn bottom lifting technical effect is realized through the simple and reliable control structure, the workload of manually removing the waste yarn in the follow-up process is avoided, the structure of the full-automatic computerized flat knitting machine applied to the zero waste yarn bottom lifting control structure is not limited by whether a front needle bed and a rear needle bed are arranged, the structure is simple and reliable, and the implementation cost is low;
the invention also provides a preferable zero waste yarn bottoming control method, in order to realize accurate and reliable zero waste yarn bottoming effect, when the bottom of the woven clothes is lifted each time, firstly, the front roller and the rear roller are confirmed to be in an interval opening state, the steel wire is in a winding state, and the bottoming lifting plate is positioned below the front roller and the rear roller and used as an initial zeroing position, so that the subsequent control operation is ensured to be smoothly implemented;
the invention also preferably provides a bottom lifting motor driving circuit preferably used for zero waste yarn bottom lifting, wherein the bottom lifting motor and the steel wire motor both adopt the H-bridge driving circuit respectively provided with the phase A current H-bridge driving circuit and the phase B current H-bridge driving circuit as corresponding main driving structure devices, so that good chopping driving adjustment can be respectively carried out on phase current pulse signals output by pins of the bottom lifting driving chip and the steel wire driving chip, and the bottom lifting motor and the steel wire motor can be respectively and reliably driven.
Drawings
FIG. 1 is a schematic view of the installation and connection of a zero waste yarn bottoming control structure (steel wire 15 is in a state of penetrating through each pinhole 16 a) in the embodiment of the invention;
FIG. 2 is an enlarged view of a portion of the base pin 16 of FIG. 1;
FIG. 3 is a block diagram of the operation steps of a zero waste yarn bottoming control method in accordance with an embodiment of the present invention;
fig. 4 is a schematic diagram of an electrical connection structure of a DRV8711DCP driving chip in the embodiment of the present invention;
fig. 5 is a schematic circuit connection diagram of a DRV8711DCP driver chip and its corresponding H-bridge driver circuit in the embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a zero waste yarn bottom lifting control method of a full-automatic computerized flat knitting machine, the full-automatic computerized flat knitting machine comprises a needle plate, a front roller and a rear roller which are arranged in parallel front and back are arranged below the needle plate, the front roller and the rear roller are used for providing a traction effect for knitted clothes through relative rotation, the front roller and the rear roller can realize the switching of the interval opening and closing state under the driving effect of a roller opening and closing motor, the zero waste yarn bottom lifting control method is characterized in that the full-automatic computerized flat knitting machine is respectively provided with a bottom lifting plate which is driven by a bottom lifting motor and is arranged between mounting frames at two sides of the full-automatic computerized flat knitting machine and a steel wire motor for selectively feeding and collecting wires, the bottom lifting plate is provided with a plurality of bottom lifting needles which are arranged in rows at intervals, a needle tooth interval for limiting penetrating yarns is formed between every two adjacent bottom lifting needles, and the upper end part of each, the penetrating direction of the steel wire in the needle hole is vertical to the penetrating direction of the yarn in the needle tooth interval; the zero waste yarn bottom-lifting control method adopts a MCU control main chip of the full-automatic computerized flat knitting machine for control, and the control process comprises the following steps:
A10) confirming that the full-automatic computerized flat knitting machine is in a reset-to-zero state, wherein the reset-to-zero state refers to: the front roller and the rear roller are in an interval opening state, the steel wire is in a winding state, and the bottom lifting plate is positioned below the front roller and the rear roller and serves as an initial return-to-zero position;
A20) the bottom lifting plate is lifted to the upper part of the needle plate through the bottom lifting motor, and the first line of yarns for weaving the clothes are respectively limited and penetrate through the needle tooth interval of the bottom lifting plate;
A30) limiting a steel wire to penetrate through needle holes of the bottom lifting needles through a steel wire motor, and providing traction force for the first row of yarns through the steel wire;
A40) the machine head weaves the first line of yarns according to the weaving pattern requirement, and in the weaving process, the position of the bottom lifting plate is lowered and adjusted by the bottom lifting motor until the position is lowered to be below the interval between the front roller and the rear roller;
A50) the roller opening and closing motor ensures the closed state of the front roller and the rear roller, the front roller and the rear roller provide traction for woven clothes, zero waste yarn bottoming control is completed, and normal weaving control operation is started.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, a zero waste yarn bottom-lifting control structure of a full-automatic computerized flat knitting machine, the full-automatic computerized flat knitting machine comprises a needle plate (not shown), a front roller 11 and a rear roller 12 which are arranged in parallel in front and at back are arranged below the needle plate, the front roller 11 and the rear roller 12 are used for providing a drawing effect to woven clothes through relative rotation, the front roller 11 and the rear roller 12 can realize the switching of the interval opening and closing state under the driving effect of a roller opening and closing motor (not shown in the figure, and particularly arranged on an installation rack 10 of the full-automatic computerized flat knitting machine), specifically, the roller opening and closing motor drives the front roller 11 and the rear roller 12 through a transmission structure to realize the switching of the interval opening and closing state, as the technical scheme of the roller structure with the opening and closing effect belongs to the common knowledge in the field of the full-automatic computerized flat knitting machine, the embodiment, the embodiment is not explained in detail;
in this embodiment, the zero waste yarn bottom-lifting control structure includes a bottom-lifting plate 13 driven by a bottom-lifting motor (not shown) and installed between the installation frames 10 on both sides of the full-automatic computerized flat knitting machine, and a steel wire motor 14 for selectively feeding and receiving the steel wire, wherein a steel wire reel 15a for winding the steel wire 15 is installed on the installation frame 10, and the steel wire reel 15a is located on one side of the steel wire motor 14; a plurality of bottom lifting needles 16 arranged in rows at intervals are arranged on the bottom lifting plate 13, a needle tooth interval 16d for limiting and penetrating through yarns is formed between every two adjacent bottom lifting needles 16, meanwhile, the upper end part of each bottom lifting needle 16 is provided with a needle hole 16a for limiting and penetrating through a steel wire 15, the penetrating direction of the steel wire 15 in the needle hole 16a is vertical to the penetrating direction of the yarns in the needle tooth intervals 17, and therefore the steel wire 15 is ensured to provide reliable and stable traction effect for the yarns positioned in the needle tooth intervals 16 d;
preferably, as further shown in fig. 2, in the present embodiment, the bottoming needle 16 includes a bottoming needle insertion portion 16c located at the lower end portion and a needle hole 16a located at the upper end portion, and a needle tooth 16b is integrally connected between the bottoming needle insertion portion 16c and the needle hole 16a, wherein the upper end portion of the bottoming lifting plate 13 is provided with a plurality of insertion slots 13a arranged in a row at intervals, and each bottoming needle insertion portion 16c is fixedly inserted in each insertion slot 13 a; a needle tooth interval 16d for limiting the penetrating yarn is formed between every two adjacent needle teeth 16 b; specifically, preferably, the outer diameter range of the steel wire 15 is 0.5-0.8mm, the aperture range of the pinhole 16a is 1-1.5mm, the actual outer diameter of the steel wire 15 and the aperture of the pinhole 16a can be conventionally selected according to actual needs, and the embodiment is not particularly limited;
preferably, as further shown in fig. 4 and 5, in this embodiment, the roller opening and closing motor, the bottom-lifting motor and the steel wire motor 14 are respectively provided with a roller driving chip, a bottom-lifting driving chip and a steel wire driving chip for driving control, and driving signals of the roller driving chip, the bottom-lifting driving chip and the steel wire driving chip are all output by the main chip controlled by the MCU of the fully-automatic computerized flat knitting machine; further preferably, as shown in fig. 5, the driving signals include a motor speed signal STEP1 and a motor steering signal DIR 1; in order to facilitate quick communication, the MCU controls the main chip to be in communication connection with the roller driving chip, the bottom lifting driving chip and the steel wire driving chip in a bus mode; particularly preferably, the MCU control main chip adopts an STM32F103VC chip 20, the roller driving chip, the bottom lifting driving chip and the steel wire driving chip all adopt a DRV8711DCP driving chip 30, and when in working operation, the DRV8711DCP driving chip 30 calculates an output phase current pulse signal according to the received corresponding driving signal;
this embodiment sets up zero yarn waste control structure through the installation on full-automatic computerized flat knitting machine, mainly includes: the bottom lifting motor is used for lifting the bottom lifting plate 13, the bottom lifting plate 13 and the steel wire motor 14 is used for selectively feeding and collecting wires by steel wires, meanwhile, a plurality of bottom lifting needles 16 arranged in rows at intervals are arranged on the bottom lifting plate 13, a needle tooth interval 16d for limiting and penetrating through yarns is formed between every two adjacent bottom lifting needles 16, needle holes 16a for limiting and penetrating through the steel wires 15 are arranged at the upper ends of the bottom lifting needles 16, in the practical work of the embodiment, under the lifting driving action of the bottom lifting motor, the bottom lifting plate 13 is lifted to the position above a needle plate of the full-automatic computerized flat knitting machine, the first line of yarns are respectively limited and penetrated at the needle tooth interval 16d of the bottom lifting plate 13, then the steel wires are driven by the steel wire motor 14 to be fed until the steel wires penetrate through the needle holes 16a of the row-shaped bottom lifting needles 16, and the yarns are pulled by the steel wires 15 under the state, and then can realize when can not receiving roller tractive effect in the clothing of weaving not reacing the roller position, the zero yarn waste play end control structure that this embodiment provided can replace the roller completely when playing the end and provide nimble reliable tractive effect to weaving the clothing, do not need any yarn waste to fill the play end, real zero yarn waste play end technological effect has been realized through simple reliable control structure, avoid follow-up need the artifical work load of dismantling the yarn waste, and the full-automatic computerized flat knitting machine structure to its application does not receive the restriction whether has preceding, back needle bed, moreover, the steam generator is simple in structure reliable, the implementation cost is low.
On the basis of the above zero waste yarn bottoming control structure, the embodiment also specifically and preferably provides a bottoming lifting motor driving circuit for zero waste yarn bottoming, a first H-bridge driving circuit is arranged between the bottoming lifting driving chip and the bottoming lifting motor, an input signal of the first H-bridge driving circuit is a phase current pulse signal output by the bottoming lifting driving chip, and an output signal of the first H-bridge driving circuit is a phase current of the bottoming lifting motor and is used for driving the bottoming lifting motor to operate; a second H-bridge driving circuit is arranged between the steel wire driving chip and the steel wire motor, the input signal of the second H-bridge driving circuit is a phase current pulse signal output by the steel wire driving chip, and the output signal of the second H-bridge driving circuit is the phase current of the steel wire motor and is used for driving the steel wire motor to run;
the first H-bridge driving circuit and the second H-bridge driving circuit respectively comprise an A-phase current H-bridge driving circuit and a B-phase current H-bridge driving circuit, the A-phase current H-bridge driving circuit comprises a first MOS switching tube Q1, a second MOS switching tube Q2, a third MOS switching tube Q3 and a fourth MOS switching tube Q4, the source electrode of the first MOS switching tube Q1 is connected with the drain electrode of the second MOS switching tube Q2, and a connection point between the source electrode of the first MOS switching tube Q1 and the drain electrode of the second MOS switching tube Q2 is connected with an A-phase current positive pulse signal AOUT1+ (output by a corresponding drive chip AOUT1 pin) and outputs a corresponding motor A-phase positive current AOUT1 +; the source electrode of the third MOS switch tube Q3 is connected with the drain electrode of the fourth MOS switch tube Q4, and the connection point between the source electrode of the third MOS switch tube Q3 and the drain electrode of the fourth MOS switch tube Q4 is connected with an A-phase current negative pulse signal AOUT1- (output by a corresponding drive chip AOUT2 pin) and outputs a corresponding motor A-phase negative current AOUT 1-;
the B-phase current H-bridge driving circuit comprises a fifth MOS switching tube Q5, a sixth MOS switching tube Q6, a seventh MOS switching tube Q7 and an eighth MOS switching tube Q8, wherein the source electrode of the fifth MOS switching tube Q5 is connected with the drain electrode of the sixth MOS switching tube Q6, and the connection point between the source electrode of the fifth MOS switching tube Q5 and the drain electrode of the sixth MOS switching tube Q6 is connected with a B-phase current positive pulse signal BOUT1+ (output by a pin of a corresponding driving chip BOUT 1) and outputs a corresponding motor B-phase positive current; the source electrode of the seventh MOS switch tube Q7 is connected to the drain electrode of the eighth MOS switch tube Q8, and the connection point between the source electrode of the seventh MOS switch tube Q7 and the drain electrode of the eighth MOS switch tube Q8 is connected to the B-phase current negative pulse signal BOUT1- (output from the corresponding pin of the drive chip BOUT 2), and outputs the corresponding motor B-phase negative current BOUT 1-; specifically, the models of the MOS switch transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 of the present embodiment are all BSC100N06LS 3G;
the motor A phase negative current and the motor B phase negative current are respectively connected to the interface sockets of the corresponding motors;
preferably, in this embodiment, the gates of the MOS switch tubes Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 are all connected to the PWM driving signal output by the corresponding driving chip pin, the drains of the first MOS switch tube Q1, the third MOS switch tube Q3, the fifth MOS switch tube Q5, and the seventh MOS switch tube Q7 are respectively connected to a 48V driving power supply, and the sources of the second MOS switch tube Q2, the fourth MOS switch tube Q4, the sixth MOS switch tube Q6, and the eighth MOS switch tube Q8 are respectively connected to the ground through the current sampling resistor R152 (specification of 50Mr/2W), and the R153 (specification of 50 Mr/2W); the gates of the MOS switch tubes Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 are connected in series with a current limiting resistor, and a pull-down resistor for protection is connected between the gate of each MOS switch tube and the source thereof, as shown in fig. 5, the current limiting resistor includes R147(10R), R149(10R), R148(10R), R150(10R), R157(10R), R160(10R), R158(10R), R181(10R), and the pull-down resistor includes R170(499K), R172(499K), R171(499K), R173(499K), R174(499K), R178(499K), R175(499K), and R177(499K), respectively; in other embodiments, the specific resistance value of each resistor may be specifically selected according to actual control requirements, and is not particularly limited in the present application.
Preferably, in the present embodiment, a third H-bridge driving circuit is provided between the roller driving chip and the roller opening and closing motor, and the structure of the third H-bridge driving circuit is the same as that of the first H-bridge driving circuit and that of the second H-bridge driving circuit; the input signals of the third H-bridge driving circuit are phase current pulse signals output by corresponding pins of a DRV8711DCP driving chip (roller driving chip), and the output signals are phase currents of a roller opening and closing motor corresponding to the phase current pulse signals and are used for driving the roller opening and closing motor to operate.
The bottom lifting motor, the steel wire motor and the roller opening and closing motor in the embodiment all adopt the H bridge driving circuit respectively provided with the phase A current H bridge driving circuit and the phase B current as corresponding main driving structure devices, good chopping driving adjustment can be carried out on phase current pulse signals output by the bottom lifting driving chip and the pins of the steel wire driving chip respectively, and reliable driving of the bottom lifting motor and the steel wire motor 14 is realized respectively.
On the basis of the above technical solutions, please refer to fig. 3, this embodiment provides a zero waste yarn end-lifting control method for a full-automatic computerized flat knitting machine, where the zero waste yarn end-lifting control method is controlled by a MCU control main chip of the full-automatic computerized flat knitting machine, and the control process includes:
A10) confirming that the full-automatic computerized flat knitting machine is in a reset-to-zero state, wherein the reset-to-zero state refers to: the front roller and the rear roller are in an interval opening state, the steel wire is in a winding state, and the bottom lifting plate is positioned below the front roller and the rear roller and serves as an initial return-to-zero position; in actual implementation, if the full-automatic computerized flat knitting machine is not in the reset-to-zero state, the MCU controls the main chip to selectively send corresponding driving signals for realizing the reset-to-zero to the roller driving chip, the bottom lifting driving chip and the steel wire driving chip according to requirements, so that the full-automatic computerized flat knitting machine is ensured to be in the reset-to-zero state;
A20) the bottom lifting plate is lifted to the upper part of the needle plate through the bottom lifting motor, and the first line of yarns for weaving the clothes are respectively limited and penetrate through the needle tooth interval of the bottom lifting plate;
A30) limiting a steel wire to penetrate through needle holes of the bottom lifting needles through a steel wire motor, and providing traction force for the first row of yarns through the steel wire;
A40) the machine head weaves the first line of yarns according to the weaving pattern requirement, and in the weaving process, the position of the bottom lifting plate is lowered and adjusted by the bottom lifting motor until the position is lowered to be below the interval between the front roller and the rear roller;
A50) the roller opening and closing motor ensures the closing state of the front roller and the back roller, the front roller and the back roller provide the traction effect for the woven clothes, the zero waste yarn bottoming control is completed, and the normal weaving control operation (namely the known weaving process adopting the roller to provide the traction effect) is started.
Preferably, in the present embodiment, after the step a50), a step a60) is further included: after the steel wires are completely drawn out of needle holes of the bottom lifting needles by the steel wire motor, the steel wires are wound, and meanwhile, the bottom lifting plate is lowered to the initial zero return position by the bottom lifting motor, so that the situation that the woven clothes in the next period can enter the fast zero waste yarn bottom lifting weaving process can be reduced, and the running time of the step A10) is avoided;
further preferably, in the embodiment, the output torque of the wire motor is 0.4-0.6NM, and the bottom lifting motor is 2.2-2.5 NM.
In order to realize accurate and reliable zero waste yarn bottom lifting effect, in the embodiment, when the bottom lifting of woven clothes is carried out at each time, firstly, the front roller 11 and the rear roller 12 are confirmed to be in an interval opening state, the steel wire 15 is in a rolling state, and the bottom lifting plate 13 is positioned below the front roller 11 and the rear roller 12 to serve as an initial zero return position, so that the subsequent control operation is ensured to be smoothly implemented.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A zero waste yarn bottom lifting control method of a full-automatic computerized flat knitting machine comprises a needle plate, wherein a front roller and a rear roller which are distributed in a front-back parallel mode are installed below the needle plate, the front roller and the rear roller are used for providing a traction effect for knitting clothes through relative rotation, the front roller and the rear roller can realize switching between an interval opening state and an interval closing state under the driving effect of a roller opening and closing motor, the zero waste yarn bottom lifting control method is characterized in that the full-automatic computerized flat knitting machine is respectively provided with a bottom lifting plate which is driven by a bottom lifting motor and is installed between installation frames on two sides of the full-automatic computerized flat knitting machine and a steel wire motor used for selectively feeding and collecting wires, a plurality of bottom lifting needles which are arranged in a row at intervals are arranged on the bottom lifting plate, a needle tooth interval used for limiting penetrating yarns is formed between every two adjacent bottom lifting needles, and needle holes used for limiting penetrating steel wires are formed in the upper end, the penetrating direction of the steel wire in the needle hole is vertical to the penetrating direction of the yarn in the needle tooth interval; the zero waste yarn bottom-lifting control method adopts a MCU control main chip of the full-automatic computerized flat knitting machine for control, and the control process comprises the following steps:
A10) and confirming that the full-automatic computerized flat knitting machine is in a reset-to-zero state, wherein the reset-to-zero state refers to: the front roller and the rear roller are in an interval opening state, the steel wire is in a winding state, and the bottom lifting plate is positioned below the front roller and the rear roller and serves as an initial return-to-zero position;
A20) the bottom lifting plate is lifted to the position above the needle plate through the bottom lifting motor, and the first line of yarns for weaving the clothes are respectively limited and penetrate through the needle tooth intervals of the bottom lifting plate;
A30) limiting a steel wire to penetrate through needle holes of the bottom lifting needles through the steel wire motor, and providing traction force for the first row of yarns through the steel wire;
A40) the machine head weaves the first line of yarns according to the weaving pattern requirement, and in the weaving process, the position of the bottom lifting plate is lowered and adjusted by a bottom lifting motor until the position is lowered to the position below the interval between the front roller and the rear roller;
A50) the roller opening and closing motor ensures that the front roller and the rear roller enter a closed state, and the front roller and the rear roller provide a traction effect for weaving clothes, so that zero waste yarn bottom-playing control is completed, and normal weaving control operation is entered.
2. The zero waste yarn set-up control method of the full-automatic computerized flat knitting machine according to claim 1, characterized in that after the step A50), the method further comprises the step A60):
after the steel wires are completely drawn out of the needle holes of the bottom lifting needles by the steel wire motor, the steel wires are wound, and meanwhile, the bottom lifting plate is lowered to the initial return-to-zero position by the bottom lifting motor.
3. The zero waste yarn end-lifting control method of the full automatic computerized flat knitting machine according to claim 1, wherein the output torque of the wire motor is 0.4-0.6NM, and the end-lifting motor is 2.2-2.5 NM.
4. The method for controlling zero waste yarn bottom lifting of the full-automatic computerized flat knitting machine according to claim 1, wherein the roller opening and closing motor, the bottom lifting motor and the steel wire motor are respectively provided with a roller driving chip, a bottom lifting driving chip and a steel wire driving chip for driving control, and driving signals of the roller driving chip, the bottom lifting driving chip and the steel wire driving chip are all outputted by a main chip controlled by an MCU.
5. The method of claim 4, wherein the driving signal includes a motor speed signal and a motor direction signal.
6. The zero waste yarn bottom-lifting control method of the full-automatic computerized flat knitting machine according to claim 5, characterized in that the MCU control main chip adopts an STM32F103VC chip, and the roller driving chip, the bottom-lifting driving chip and the steel wire driving chip all adopt DRV8711DCP driving chips.
7. The zero waste yarn end-starting control method of the full-automatic computerized flat knitting machine according to claim 6, wherein the DRV8711DCP driving chip calculates an output phase current pulse signal according to the received corresponding driving signal.
8. The zero waste yarn end-lifting control method of the full-automatic computerized flat knitting machine according to claim 7, characterized in that an H-bridge driving circuit is respectively arranged between the DRV8711DCP driving chip and the corresponding motor, input signals of the H-bridge driving circuit are respectively phase current pulse signals output by pins of the DRV8711DCP driving chip, and output signals thereof are motor phase currents corresponding thereto for driving the corresponding motor to operate; the H-bridge driving circuit comprises an A-phase current H-bridge driving circuit and a B-phase current H-bridge driving circuit;
the A-phase current H-bridge driving circuit comprises a first MOS switching tube, a second MOS switching tube, a third MOS switching tube and a fourth MOS switching tube, wherein the source electrode of the first MOS switching tube is connected with the drain electrode of the second MOS switching tube, and a connection point between the source electrode of the first MOS switching tube and the drain electrode of the second MOS switching tube is connected with an A-phase current positive pulse signal and outputs a corresponding motor A-phase positive current; the source electrode of the third MOS switch tube is connected with the drain electrode of the fourth MOS switch tube, and a connection point between the source electrode of the third MOS switch tube and the drain electrode of the fourth MOS switch tube is connected with an A-phase current negative pulse signal and outputs a motor A-phase negative current corresponding to the A-phase current negative pulse signal;
the B-phase current H-bridge driving circuit comprises a fifth MOS switching tube, a sixth MOS switching tube, a seventh MOS switching tube and an eighth MOS switching tube, wherein the source electrode of the fifth MOS switching tube is connected with the drain electrode of the sixth MOS switching tube, and a connection point between the source electrode of the fifth MOS switching tube and the drain electrode of the sixth MOS switching tube is connected with a B-phase current positive pulse signal and outputs a corresponding motor B-phase positive current; and the source electrode of the seventh MOS switch tube is connected with the drain electrode of the eighth MOS switch tube, and a connection point between the source electrode of the seventh MOS switch tube and the drain electrode of the eighth MOS switch tube is connected with a phase-B current negative pulse signal and outputs a corresponding phase-B current of the motor.
9. The bottom control method of zero waste yarn of the full-automatic computerized flat knitting machine according to claim 8, characterized in that the gate of each MOS switch tube is connected to the PWM driving signal output from the corresponding driving chip pin, the drains of the first, third, fifth and seventh MOS switch tubes are respectively connected to a 48V driving power supply, and the sources of the second, fourth, sixth and eighth MOS switch tubes are respectively grounded through a current sampling resistor.
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Address after: 215500 910, building 1, Tongji Plaza, No. 333, Hushan Road, Changshu high tech Industrial Development Zone, Suzhou, Jiangsu Applicant after: Suzhou characteristic Electronic Technology Co.,Ltd. Address before: 215500 3rd floor, building a, maihong electronics, Zhouxing Yeyuan Road, Haiyu Town, Changshu City, Suzhou City, Jiangsu Province Applicant before: Suzhou characteristic Electronic Technology Co.,Ltd. |
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Application publication date: 20200818 |