SU1399704A1 - Apparatus for program control of stepping drive - Google Patents

Abstract

The invention relates to automation and computer technology and can be used to automate machine tools and other machines equipped with stepper electric drives. The purpose of the invention is to simplify the device. The device contains a program input unit 1, a displacement transducer 2, a JK-trigger 3, a coincidence element 4, 5, a pulse shaper 6, an element OR 7, a phase switch 8 and a square drive 9. 2 or less.

Description

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QD

The invention relates to automation and computer technology and can be used to automate metal machines and other machines equipped with stepper electric drives.

The purpose of the invention is to simplify the device.

FIG. shows the functional diagram of the proposed device for software control of the stepper drive; figure 2 - timing charts of his work.

The device contains a block I input | Program, displacement sensor 2, JK-trigger 3, the elements 4 and 5 of the match, the pulse shaper 6, the element OR 7, the switch 8 phases and stepper drive 9.

The device works as follows.

: Each program impulse coming from the block I input through the element OR 7 to the first input of the switch 8 causes the turn of the stepper line 9 and the movement of the working body, for example the machine support, which is rigidly mechanically connected to the sensor 2 of the displacement and of the Shulse type . During normal processing, i.e. if there are no errors when moving the machine support to each impulse of the program from the input unit 1, sensor 2 should also receive an impulse. If there is a negative,; error, for example, caused by the presence of a gap in the kinematic pair of the drive screw-nut of the machine support, the impulse of Program1-1 will not cause the appearance of: pulse from sensor 2, since the rotation of the stepper drive 9 will not cause movement caliper until the gap in the kinematic pair is eliminated. If at 3997042

to the K input of the trigger 3 (FIG. 2b), which tilts along the falling edge of these pulses. In the absence of movement errors, elements 4 and 5 of the coincidence are covered by potentials from the direct 1fig.2c) and inverse (Fig. 2e) outputs of the trigger 3 and the pulses from the input unit 1 pass through the OR element

ig the first input of the switch 8. In this case, an impulse from the sensor 2 will come to every impulse of the program from block 1. If the error is negative, the J-input of the trigger 3 arrives

5 two pulses, the second pulse passes through the coincidence element 4 (fig. 2d) to the input of the pulse former 6, which forms the impulse (fig.2d), which also comes through the element -OR 7

20 to the first input of the switch 8 and is processed by the stepper drive 9 as an additional impulse of the program. With a positive error on the K-input of the trigger 3, there will be another two pulses,

25, the second impulse passes through the coincidence element 5 (fig. 2g) and, acting on the second input of the switch 8, prohibits the passage of the next impulse pro- gram through them, eliminating:

30 most positive mistake.

Claims (1)

Invention Formula Device for programmed control of a stepping drive containing a program input unit, phase switch 35 and a displacement sensor, characterized in that, in order to simplify the device, a JK trigger, two coincidence elements, a pulse shaper and an element are introduced into it. 40 OR, and the output of the input block of the program i is connected to the J-input of the JK-trigger, to the first input of the OR element and to the first input of the first coincidence circuit connected by the second input to the direct there is no positive error at the 45 Y output of the JK-flip-flop, and the output is an example caused by a change in the forces in the drive during processing, the pulse from sensor 2 appears without the appearance of a program pulse from the I input block, since the movement of the caliper due to the change in forces in the drive, it can happen without turning the stepper drive 9, the program pulses from the input block 1 are sent to the J input of the trigger 3 Dfig .. a), and the pulses from the sensor 2 - 55 second input of the switch phase. to the input of the pulse shaper, the output of which is connected to the second input of the IL element connected to the first input of the phase switch by its output, the output of the displacement sensor is connected to the K input of the LAN of the Trigger, and the first input of the second coincidence element whose second input is connected to - ver drug output-trigger, and the output f .2