SU1400905A1 - Electric engraving machine - Google Patents

Abstract

The invention relates to the finishing production of the textile industry, can be applied in the manufacture of plate printing shafts by photoelectric copying method for printing patterns on fabrics by the intaglio printing method and can improve the quality of engraving. In an electrogravure machine, it is photoanalyzed, and the head and the setpoint potentiometer of a stable signal level are connected via a mode switch to the input of a signal level limiting key, the output of which is directly connected to the input of the rasterization key, the contour mode key is connected to the output of the photoanalyzing head and the output to the input a two-threshold contour extraction isolation comparator, with a set-level potentiometer of a stable contour level directly connected to the input key level contouring. 1 il. S &

Description

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The invention relates to the field of otdelk production of the textile industry and can be applied in the manufacture of plate printing shafts by photoelectric copying method for printing patterns on fabrics by the method of gravure printing.

The purpose of the invention is to improve the quality of engraving.

The drawing shows a block diagram of an electro-engraving machine

An electrogravure machine consists of a motor drive 1 mechanically connected to the shaft 2 of the original, engraved by the shaft 3 and the raster frequency sensor 4. Before the shaft 2 of the original, a photoanalyzer is located, and the head 5 is connected to two two-threshold comparators for limiting the level of the main signal 6 and extracting the level of the contour signal 7, which through inverters 8 and 9 are connected to the electronic keys for limiting the level of the main signal 10 and the level of the contour signal 11, respectively, the inputs of these keys are connected to the potentiometers that control the level of the main signal 12 and the level of the contour signals 13, the first of them is connected via a switch of 14 operating modes, second oh well - directly. An electronic key 15 of the contouring mode is located between the photo analyzer, its head 5, and the contour signal extracting comparator 7. The generator 16 of the raster frequency is connected on the one hand with the sensor 4 of the raster frequency, on the other - with the control input of the electronic switch

17strirovaniya signal whose output is connected to the input of the electronic key

18, blanking the rasterized signal during contouring, controlled from the output of the comparator 7, the contour signal extraction. The outputs of the blanking keys 18 and the signal level of the contouring 11 are connected to the input of the output amplifier 19, the output of which is connected to a graph head 20 located in front of the engraved shaft 3.

An electrogravure machine works in the following way.

The motor drive 1 synchronously turns on the shaft 2 of the original, the engraved shaft 3 and the raster frequency sensor 4. Photographic analysis of the head, and head 5, mixing, and smiling along the shaft of the original, reads the line drawing of the original line by line and outputs a voltage proportional to the optical density of the original, to the switch 14 modes - “tone and; 1” “bar engraving — and to the two-threshold inputs comparators of limiting the level of photosignal 6 and extracting the signal of the contouring 7, and the latter through the electronic switch 15 of enabling the contouring mode. When hit by 0

the photo signal potential into the plug of the two-level level limitation comparator 6, the latter outputs a low level to the inverter 8 and then a positive potential (high level) controls the electronic switch m10 of the photo signal level limitation, which passes a photo analysis signal directly to the electronic signal rasterization key 17 - the dividing head 5 at the tonal engraving, and only in the zone limited by the adjustable transmission level of the two-threshold comparator b, or at the second position of the switch 14 p During bar engraving, a constant stable potential from a potentiometer-setter 12 of a stable level of a bar engraving fed by a stabilized power source (not shown). In this mode, the photo signal is only control, and in the setup area

In the case of a two threshold threshold level comparator 6, engraving is carried out with a stabilized signal. The raster frequency generator 16 is triggered by pulses of the raster frequency sensor 4, generates 5 pulses in shape and duration, and controls the signal rasterization electronic key 17, which interrupts the signal at the raster frequency and outputs it to the electronic blanking key 18 during contouring. When the windowing mode is turned on (the control potential is applied to the contour switch-on key 15, the circuit is not shown in the diagram), the amplitude signal of the black-and-white transition from the photo analyzing head 6 falls into a narrowly adjustable level plug

5 of a two-threshold contouring signal extraction comparator 7, which locks the electronic key 18 of the blanking with a low output level, does not skip the rasterized signal, and through the inverter 9 opens the electronic key of a stable contour level 11 with a positive high level, transmitting a voltage-stabilized signal from the setpoint potentiometer 13 a stable level of contouring fed by a stabilized power source (not shown). In this mode, instead of the rasterized signal from the blanking key 18, the input of the output amplifier 19 receives a stabilized contouring signal of an adjustable A. amplitude from an electronic key 11 of a stable level of contouring, the duration of which is determined by the passage time of the black-and-white transition zone through the narrow level plug of the two threshold comparator 7 selection of the contouring signal. The power amplified signal from the output amplifier 19 is fed to the electromagnetic engraving head 20, which is directly a cutter on the engraving shaft 3

five

cuts out the raster points of the engraving corresponding to the analyzed original.

Claims (1)

Invention Formula An electrogravure machine, containing a drive mechanically connected to the original shaft, an engraved shaft and a raster frequency sensor, is electrically connected via a raster frequency generator to the control input of the electronic signal rasterization key, the output connected to the information input of the electronic key for contouring during contouring which is connected to the output of the contouring signal isolation comparator and to the input of the first inverter, and the output is connected via an output amplifier with the input of the engraving head and directly with the output of the key of the contour signal level, the control input of which is connected with the output of the first inverter, the control input of the electronic key for limiting the level of the main signal A second inverter and a comparator for limiting the level of the main signal are connected to the output of the photo analyzing head and to the first output of the mode switch, the setter of the stable level of the main signal, the setter of the contour signal level and the electronic key of the contouring mode, which is designed to increase the quality of engraving , the electronic key of the contouring mode is connected to the output of the contouring signal extraction comparator, and its information input is connected to the output of the photo analyzing head; the information input of the signal screening electronic key is connected to the output of the electronic key of the level limiting of the main signal, the information input of which is connected to the second output of the mode switch, the third output connected to the output of the level indicator A BASIC signal, the information input of the electronic key of the contour signal level is connected to the output of the signal level controller of the contour signal.