SU1674190A1 - Synchronizer for a character printer and fonts carried on tape - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used, for example, in information output devices. In order to increase speed, accuracy in a device for synchronizing a character printing device with an infinite font carrier, containing a tape font carrier 1 mechanically connected to drive 2 and carrying synchromesh 3, sensor 4 of sync pulses connected to shaper 5 sync pulses and block 6 of starting printing hammers 7, a period-code converter 8, a code converter 9 and a counter 10 are introduced, due to which each clock period of the sync pulses is measured and the moment of impact is corrected. trays 7 in the block 6 by delaying the control pulse counter 10. The 2-yl.

Description

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The invention relates to automation and computing and can be used, for example, in information output devices.

The purpose of the invention is to increase the speed and accuracy of the device for synchronizing a character printing device with an infinite font carrier.

FIG. 1 shows a functional diagram of the device; in fig. 2 - timing charts of the device.

The device contains a tape type carrier 1, mechanically connected to the drive 2 and carrying the synchromesh 3, a sensor 4 of the sync signals connected to the driver 5 synchro pulses, the unit 6 for starting the printing hammers 7, the period converter 8 is the code, the code converter 9 and the counter 10.

FIG. 2 shows time diagrams of 11–13 signals at the outputs of blocks 4, 5 and 10, respectively.

The device works as follows.

During the printing process, the font carrier 1 is set in motion with the speed V by the drive 2. With the passage of the synchrometer 3 (which is a protrusion on the metal font 1) near the magnetoelectric sensor 4, the latter generates a signal 11 (Fig. 2), which is fed to the driver 5 sync pulses. A shaper 5, which is a comparator, generates a signal 12 arriving at counter 10. The positive edge of this signal corresponds to the timing of the synchromett 3 near sensor 4 and starts (initiates) the counting at counter 10 from the initial value. Counter 10 counts to the number that enters it previously from converter 9, after which it produces a negative pulse 13 and stops. Thus, from the output of the counter 10 to the control input of the trigger unit 6 of the hammers 7, an impulse 13 is received, delayed relative to the positive edge of the signal 12 by the time At. This pulse determines the start of the start of hammers 7, connected to block b, containing, as a rule, hammer amplifiers, a hammer register, into which information for printing from

printing device, and synchronization circuits (not shown).

In Converter 8, the period — the code determines the period of the clock pulse and the delay time D t depending on the speed of movement of the font carrier 1. The code is converted by the converter 9 and is recorded in the counter 10. This happens after the arrival of each successive clock pulse 12. Then from the internal generator of the converter 9 the clock pulses are passed to the counting input of the counter 10 and when the enabling pulses 12 arrive, they are recalculated with a variable delay A t depending on what is written to it

converter code 9. Impulses 13 with

the output of block 10 is fed to block 6, where

the next character is printed.

Thus, due to the continuous measurement of the speed of the sync marks, by measuring the period of the following synchromes and introducing the corresponding delay into the control circuit of the block 6, the moment correction is performed.

hitting print hammers, which increases the accuracy of the device and allows you to print at a faster speed.

thirty

Claims (1)

Invention Formula A device for synchronizing a character printing device with an infinite font carrier, comprising a printing hammer triggering unit whose inputs are device inputs, a drive mechanically connected to the font carrier, a sync signal sensor connected by a clock generator, characterized by that, in order to improve the accuracy of the device, it contains a counter, a code converter and a period converter - a code whose outputs are connected to the corresponding converter inputs codes, and the input is connected to the counting input of the counter and to the output of the sync pulse generator, the control inputs of the meter are connected to the corresponding inputs of the code converter, and the output is connected to the control input of the printing hammer trigger unit. and eleven 12 13 , At Schi I