JPH0194893A - Industrial sewing machine - Google Patents

Abstract

PURPOSE: To surely prevent the obstruction of signal transmission by providing a driving stage provided with a device for inverting transmission signals in the respective output of n pieces of constituting elements and providing a formation device of the difference of inverted signals and non-inverted signals in the respective input of the n pieces of the constituting elements. CONSTITUTION: The operation of an adjustment controller 8 are performed through an operation and display device 9. Then, in order to transmit the signals back and forth among the n pieces of the connected constituting elements, respective two conductors 34 and 35, or 36 and 37 are provided. Also, to the respective output 16 and 19 of the n pieces of the constituting elements, the driving stage 26 provided with the device for inverting the signals to be transmitted is disposed. Further, through the respective conductors 34 and 35 or 36 and 37, the inverted signals LB and the non-inverted signals LA are transmitted. Also, to the respective input 17 and 20 of the n pieces of the constituting elements, the difference formation device 27 for forming the difference of the inverted signals LB and the non-inverted signals LA is provided. As a result, the obstruction of the transmission of the signals can be surely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an upper shaft that can be driven via an electric drive unit, a position signal generator disposed on the upper shaft, and an electric drive that is dependent on the position signal generator. The present invention relates to an industrial sewing machine having an adjustment and control device for controlling a section, an operation and display device, and an interface device that connects the adjustment and control device and the operation and display device with other components. .

An industrial sewing machine or an electronic positioning device of this type is known from DE 29 38 040 A1.

In this known device, an external operating element is connected via a parallel connection, which responds by controlling the drive. This connection of the operating and display device and the adjustment and control device ensures that the signal transmission between the control and display device and the adjustment and control device and other external components is suitable under all conditions of use. cannot be done accurately. Because 1
This is because, for example, the electronic elliptical elements in the vicinity of the sewing machine are disturbed by the switching of relays or magnets and their removed electromagnetic fields.

The object of the present invention is to improve the individual configuration of industrial sewing machines in such a way that the amount of conductors used is reduced and the variability of the connections used is increased to ensure that interference with signal transmission is prevented. It is about connecting elements.

MD & In order to achieve the above object, the present invention provides two conductive wires for reciprocating signal transmission between n connected components, and an output of each of the n components. has a drive stage with a device for inverting the signal to be transmitted, the inverted signal and the non-inverted signal being transmitted via one conductor in each case.

It is characterized in that each input of the n components has a difference forming device for forming the difference between the inverted signal and the non-inverted signal.

This type of interface device (e.g. known document R5)
422), e.g.
Interference with signal transmission can be effectively prevented without the use of additional filters such as circuit networks. The sequence of information transmission proposed by the arrangement according to the invention reduces the amount of conductors used.

For example, individual devices such as operating devices, control devices, test devices, storage devices, etc. can be connected to a single information line, making it possible to adapt the entire device to modifications and configurations according to personal wishes. can. Additionally, data can be processed efficiently because unresponsive components can be automatically disconnected and perform their unique functions in parallel in time while disconnected from the rest of the device.

Furthermore, by distributing the functional commands to a plurality of components or storing them in multiple ways, the effect of preventing signal interference can be improved.

According to the arrangement according to the invention, the signal to be transmitted is divided symmetrically into a standard signal and an inverted signal, and these signals are transmitted via separate conductors. On the receiving side, the signals are related in such a way that the difference between the two signals exceeds a predetermined threshold value and produces an output signal.

The transmission technology used in the industrial sewing machine according to the invention is fundamentally different from previous attempts to prevent signal interference by the sewing machine or its associated controls and drives. In the past, the individual components themselves were designed in such a way that they caused as little signal interference as possible, and the completed sewing machine or drive was correspondingly inspected using classical inspection methods that were susceptible to interference, i.e., individually inspected. countermeasures to prevent interference.

However, this traditional procedure is limited by the fact that the electronic components of industrial sewing machines have become increasingly complex these days, making it difficult to test for possible interference effects; No consideration is given to the provision of additional equipment that may be modified accordingly or that may not be considered in the manufacturer's approach to interference removal.

Furthermore, for each input or output of the n components,
Advantageously, a transmitting or receiving device is associated with a particular component for transmitting or receiving coded signals. This configuration allows all components to be connected to one common data conductor, so that each component does not have to transmit signals in parallel, allowing the device to be expanded arbitrarily without hardware changes. can be adapted.

Arrow] U bill Next, embodiments of the present invention will be described using the accompanying drawings.

The industrial sewing machine 1 shown diagrammatically in FIG. 1 is driven by a positioning drive 2 via a belt drive 3. The industrial sewing machine 1 shown schematically in FIG. A position signal transmitter 5 is arranged on the upper shaft 4 of the sewing machine 1 shown diagrammatically. A sensor in the form of a light interrupter 7 is provided in the sewing area in front of the needle 6 .

An adjustment and control device 8 is attached to the positioning drive 2 or to the sewing machine 1 . The adjustment and control device 8 is operated and controlled via a control and display device 9.

The operating and display device 9 has a display 10, a light emitting diode device 11 and an input keyboard 12.The display 1o, the light emitting diode device 11 and the input keyboard 12 are connected to the microprocessor 15 via data conductors 13 and 14. has been done. A transmitting or receiving device 18 is arranged between the microprocessor 15 and the output 16 or input 17.

A transmitting/receiving device 21 and a microprocessor 22 are likewise arranged behind the output 19 or input 20 of the regulating and controlling device 8. An output stage 24 is arranged between the microprocessor 22 and the output 23, via which the sewing machine 1 or the positioning drive 2 is controlled by a line 25.

FIG. 2 schematically shows the area in front of the input 16 or output 17 of the operation/display device 9, omitting components that are not important for the following explanation. A drive stage is arranged upstream of the output 16 and is equipped with a device for inverting the signal 01 to be transmitted. Behind the input 17, a difference forming device 27 (
For example, 5N75175) are arranged.

An input 20 of the regulating and controlling device 8 is connected to the output 16;
An input 17 of an operating and display device is connected to the output 19 of the regulating and controlling device 8. In parallel to the input 20 or output 19 of the regulating and controlling device.

For example, if another sewing machine 28 that operates depending on sewing machine 1 is
It can be connected as the second component (see FIG. 4).

A resistor Rx is arranged between the conductor 34.35 or 36.37 carrying the signal LA or LB and the signal LA' or LB', respectively. This resistor RX (e.g. 1
Ω) is used to adjust the threshold value S or S that contributes to the formation of the output signal.

FIG. 3 is an explanatory diagram of signal formation and its transmission.

The output signal On of the n-th component, e.g.
The inverted signal LB (including 74) is divided into the non-inverted signal LA and then transmitted. Transmission rear tube 3
The signal type LA or LB shown in the figure results. From these transmitted bow marks LA or LB, the difference forming device 27 n
The output signal In of the second component, for example the output signal I2 of the regulation and control device 8, is formed. The interfering component is removed depending on the height of the threshold value S 2 or S 2 adjusted via the resistor R. Such a transmission technique ensures a reliable separation of signal and interference noise and therefore makes the transmission of the signal very reliable. - FIG. 4 shows how one individual component can be connected via one common data conductor 29. In this case, a transmitter/receiver device 1130 is attached to each component. These transmitting/receiving devices correspond to the aforementioned transmitting/receiving devices 18.21. Components of this type include the sewing machine 1, the operation/display device 9. In addition to the optical interrupter 7° adjustment/control device 8 and the sewing machine 28 that operates depending on the sewing machine 1, components such as a tester device 31, a storage device 32, a modem device 33, a position signal generator 5, and pressure, temperature, etc. field (e.g. electromagnetic field)
A sensor 34 such as the following may be considered.

Via the data conductor 29 one coded signal is applied in each case, so that the addressed component
Only correspondingly coded receiving devices are activated. Encoding or decoding is carried out by the microprocessor 15.22 mentioned above.
Alternatively, it may be performed by other suitable microprocessors or via known logic circuits.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an industrial sewing machine according to the invention with an external adjustment and control device, operating and display device. Fig. 2 shows the signal transmission path between the operating and display device and the components to be controlled by it, Fig. 3 shows the generated and transmitted signals, and Fig. 4 shows one common 2 is a layout diagram of various components connected to data conductors; FIG. 1...Industrial sewing machine 4...Upper shaft 26.
...Drive stage 34, 35, 36, 37...Conductor - Ro - Ro - Ro - Ro C< Mouth C O-・ ” -

Claims (2)

[Claims] (1) an upper shaft that can be driven via an electric drive section, a position signal generator disposed on the upper shaft, and an adjustment/control device that controls the electric drive section depending on the position signal generator; In an industrial sewing machine having an operating/indicating device, an adjusting/controlling device, an interface device coupling the operating/indicating device, and other components, signals are transmitted back and forth between n connected components. Connect two conductors (
34, 35 or 36, 37) are provided, and the outputs (16, 19) of each of the n components are
It has a drive stage (26) with a device for inverting the signal to be transmitted, in each case via one conductor (34, 35 or 36, 37) the inverted signal (LB) and the inverted signal (LB). Since a non-inverted signal (LA) is transmitted and the inputs (17, 20) of each of the n components form the difference between the inverted signal (LB) and the non-inverted signal (LA). An industrial sewing machine characterized by having a difference forming device (27). (2) Inputs for each of n components (17, 20)
Alternatively, the output (16, 19) is provided with a transmitting or receiving device (18, 21, 30) for transmitting or receiving a coded signal to a specific component. , an industrial sewing machine according to claim 1.