SU1339174A1 - Flat-knitting machine control device - Google Patents

Abstract

A knitting machine has at least one pair 5 of needle beds, carriages 4,2,3 operating one after the other and for controlling the machine, fixed setting elements arranged in sections 5', 8', 10, 11 and a minicomputer control unit 25. Associated with each setting element section 5', 8', 10, 11 is an initiator 20-24 which is disposed upstream of the associated setting element section in the direction of travel of the carriages and is operated by each carriage; each initiator is connected via an input line 27-31 to minicomputer 25; one group of output lines 41 of the minicomputer 25 is connected via individual amplifiers 43-50 and a further group of the output lines 42 is connected via group amplifiers 77', 77'', 77''', 77 to 80 to the setting element sections 5', 8', 10, 11 combined in a matrix circuit. The influence of disturbing pulses on the input lines 27-31 of the minicomputer 25 is reduced to a minimum by causing the computer to repeatedly interrogate the same input line for very short periods (2 mu s) until a signal is detected, before repeatedly interrogating the next line in the sequence. <IMAGE>

Description

The invention relates to knitwear equipment, more specifically to flat panel fittings with at least one pair of needle cases and sequentially scribed carriages, stationary regulators and equipped with microcomputers.

There is a device for controlling the flare machine, which contains stationary sections of the regulating bodies for switching the wedges of the carriages, shifting the needle beds and picking needles connected to the outputs of the corresponding units of the programmable control unit connected to the synchronization unit with the operation of the card (US Patent No. 3940951 , Cl. D 04 B 15/78, 1976).

In the known device, a program block (HOIC) of an adjustment, made in the form of a microcomputer, records in the memory all the necessary information for the caret in the interrupt mode. From the memory, this information is transmitted to the regulatory authorities via unlock commands.

All other possible causes of interrupts, such as, for example, failures in outputting information, stopping the machine, etc., are fed to one interrupt input, which increases the frequency of interruptions. The cause of the interrupt is determined by the control device. Technologically necessary interruptions are onreda: 1 are also a program, but they are superimposed on them by opium reasons. Additional mitigation is required to reduce the influence of VIC interference.

The aim of the invention is to ensure that work is done.

The invention is based on the task of creating a control device for a flat plate machine using a microcomputer, in which the influence of interfering impulses on the output lines of the microcomputer would be minimally affected.

In the proposed device for controlling flat planes, each control section of the regulating organs of the ocnaniena has a track crossing, which is located along the carriage movement in front of its section and which each control unit acts on. Each track switch is connected input. 1minia with microcomputer, which contains a survey program. The first group of micro-AVLA input lines through separate amplifiers. 1i, and the second group of output lines, through group amplifiers, are connected to sections of regulators connected in a matrix pattern. At the same time, the reduction of interference effects is achieved without additional technical support.

FIG. 1 shows a block diagram of a jacquard device of a circular circle with a die-shaped map; in fig. 2principle connection scheme of regulating oriioiB; in fig. 3 connection diagram ka0

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regulatory carcass; in fig. 4 is a flowchart of the control program.

On a closed guide 1 (Fig. 1) of a jacquard square circle of a zalnaya mashina there are carriages 2–4, equipped with hall systems (only three carriages are conventionally shown). The carriages 2-4 constantly move along the closed guide 1 and interact with two pairs of needle beds placed one after the other, of which only a pair 5 is partially depicted. In the area of the guide 1 between the pairs of needle beds are placed the sections of the regulating bodies.

The first section 5 is formed by a group of 6 regulatory bodies Ml-Mb, a group of 7 regulatory bodies Ml-Mb and a group of eight regulatory bodies M7-M12. Regulatory groups 6-8 are intended to transmit patterning and control commands to carriages 2-4 for switching the carriage locking wedges. The design of the regulatory bodies of groups 6, 7 and 8 is known from the patent DD 142899 and the DD WP D 04 B / 213040 application.

Further along the carriage movement section 8 is placed with a group of 9 regulatory organs Ml - M4. for shearing needle beds. Behind it are sections 10 and 11 for transmitting jacquard information (to the switching mechanism for picking needles) into carriages 2-4. Section 10 includes groups 12-15 of the regulatory bodies M 1-MLO. Section I consists of groups 16-19 of the regulatory bodies MH1-MHZO. The design of the jacquard information transfer unit with the regulator, the texture of the pattern-forming plates and the pattern-forming drum is known from DDWR 04 B / 215076.

In the area of the guide 1, path switches 20-24, for example slotted contactless, are located between the pairs of needle cases. These switches can also be used with any other known approximation converters to an e.pectric signal — mechanical, magnetic (Hall generators), photo-optical, etc. These switches 20-24 are designed to generate an input signal at the approach of each carriage 2 4, which is fed to the microcomputer 25 to provide the desired control signals and patterning. The sequence, number and placement of the switches 20-24 is determined by the type of mask. On the jacquard square circle, in the direction of the movement of the carriages 2-4, the shift call signal switch 20, the call signal switching signal switches 21 and 22, the jacquard call signal switches 23 and 24 are placed. Each impact carriage 2-4 has a protrusion 26 Each switch 20-24 through the corresponding line 27-31 is connected to the input device 32 micro-computers 25.

A microcomputer 25 of known design consists of a central processor 33, which, through address N1inu 34, is connected to ROM 35 with a work program recorded therein and to RAM 36 containing a pattern design program. The data bus 37 couples the input 32 and output 38 of the device, the central processor 33, the ROM 35 and the RAM 36. The micro-computer 25 also contains a sensor 39 of clock pulses and a power supply unit 40. Output device 38 has a group of eight output lines 41 for outputting pattern-forming and / or control signals el-e8 and a group of twelve output lines 42 for generating signals gl-gl2 (in Figs. 1 and 2, lines 41 and 42 are combined in groups).

Each output line 41 is connected to a separate amplifier 43-50 (FIG. 2). A separate transistor, a thyristor or an integrated commutator circuit is used as a separate amplifier. It is preferable to use transistors. Each individual amplifier 43-50 (Fig. 2) is connected to the negative pole of the voltage source 51 and to the matrix circuit 52, which is divided in the indicated sections. The horizontal lines 53-60 form with vertical lines 61-72 intersection points 73 connect (Fig. 3) of the magnetic coil 74 of the corresponding regulator. The magnet 1a of the coil 74 is connected in series with the separation diode 75 and in parallel with the diode 76. Vertical lines 61 72 (Fig. 2) are connected to group amplifiers 77. FIG. 2 depicts group amplifiers 77-80 of Jacquard information transmission. Amplifiers 77-80 can also be made in the form of transistors, thyristors, or integrated switched circuits.

The device works as follows.

After the launch of the program of the jacquard round circles, the machine is controlled by program A to bring it to a certain initial state (Fig. 4). At .m, the first carriage 2 must be placed in the direction of its movement in groups of 6-8 reg. The operating organs and before the nepBijiM switch 20. Then the microcomputer 25, according to program B, generates information that is output after receiving the first input information, and remembers it in time. Then, a polling cycle I of the switch 20 is performed. The polling period is 20 ms, the polling duration is 2 ms. If there is no signal from the switch 20, the polling cycle I is repeated, and no other lines are polled. Between polls

the program monitors the jacquard square circle of the manicure. When the first carriage 2 reaches switch 20, it acts on it

the protrusion 26 for at least 20 ms, ensuring the presence of an input signal "c" on line 27 arriving at the input device 32 "during this period. With this signal present during the polling cycle I, the program transfers the program to issue the required shift information. The corresponding signals on the output lines 41 through the amplifiers 43-46 and the lines 57-60 are fed to the magnetic coils of group 9 of the regulating bodies.

5 Thereafter, according to the program, a signal is output to the group amplifier 77 via the output line 42. The amplified signal G 9 enters line 69 into the magnetic coils of the regulators of group 9. Both voltages present simultaneously at the connection points 73 excite the magnetic coils specified program, which leads to activation of the relevant regulatory authorities -M4

When the polling time of the switch 20 is short (and then the others), the influence of the contact bounce of the switch 20 is eliminated, since the first impulse from it already leads to the issuance of information, and it is re-polled only in the next cycle. The effect of external sources of interference is limited by the length of the survey, which minimizes them, as does the effect of pulses from switches 20-24, produced from

with vibration. The source of the error may be the stopping of the carriage 2 in the position when the protrusion 26 continues to act on the switch 20. However, the device has also been cleaned of such interference, since after the end of the release of information in

0, the group 9 of the microcomputer regulators 25 ceases to interrogate the switch 20 and proceeds to the execution of the program of determining and storing the information of the switching mechanism, which, after receiving the signal d on line 28, is output

 in groups 7 and 8 of regulatory bodies. Line 28 is polled in cycle II. The signal "d" appears when the protrusion 26 acts on the switch 21. At the same time, microEV. through the output device 38, the output line 41 outputs the stored signals of the switching mechanism to the separate amplifiers 43-48 (FIG. 2). Amplified signals along the lines 55-60 enter the magnetic coils of the regulators Ml -Mb, M7 -.M12 groups 7 and 8

5 regulatory bodies switching mechanism. Then the microcomputer through group amplifiers 77 and lines 70, 71 generates the group signals G10. G11 in group 7 and

8 regulatory bodies. Jointly received individual and group signals lead to the activation of regulators M - Mb, M7 - M12 according to the pattern. The switching of the lock wedges of the carriages by these regulators is carried out in a known manner and is not reflected in the drawings. After this, program D calculates and stores information for the switching mechanism b of the regulatory bodies. In cycle P1, the microcomputer 25 interrogates line 29 and after the appearance of a signal in it “e from switch 22 provides this information through amplifiers 55--60 and via line 7Z to magnetic coils of regulators Ml Mb.

Then, microcomputer E 25 calculates the following information, which is output via the lines el-e8 and G5-G8 to the regulators of the MG-MSO after the action of the protrusion 26 on the switch 23 interrogated in cycle IV. After receiving the signal "A" from the switch 24 in the V cycle of information polling, calculated on program F, is sent to the regulators MX1-MCRHR through amplifiers 43 50 through lines 53-60 and through amplifiers 77 80 80 through lines 61-64.

Thus, after the first carriage passes the last switch 24 before it reaches a pair of 5 ig 0

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On the carriage 2, all patterning and control information is transmitted. Information is transferred to other carriages in a similar manner.

Claims (1)

Invention Formula A device for controlling a flat-bed machine with one after another a pile of needle beds and unidirectional carriages along guides containing stationaryly located sections of the regulating bodies for switching the key wedges of the carriages, shifting the needle beds and taking needles connected to the outputs of the corresponding nodes of the program control unit connected to the synchronization unit with the operation of the machine, characterized in that, in order to increase the reliability of operation, the synchronization unit with the operation of the machine contains track p Switches associated with the enable inputs of the corresponding nodes of the software control unit, the switches mounted on a fixed support along the guide for the carriages so that they can interact with the latter, and each switch is placed along the movement of the carriages to the corresponding section of the regulating bodies. FIG 2 76 Fig.Z I hem r Program, E B signal J entered  Give an indentation fiem  Issue information  Bp3uHHbie demajji / J In knowledge of the part, over Stop.