SU991376A1 - Program setting device - Google Patents

Description

(54) SOFTWARE BUILDING DEVICE

The invention relates to automation and computing and can be used in multi-axis numerical control systems.

A device for setting the loop speed is known, consisting of a series-connected controlled oscillator, an interpolator, to the outputs of the coordinates X and U of which a frequency-voltage converter and a quadrant are connected, respectively, and the outputs of the quadrants are connected to the input of a summing amplifier, the output of which is connected to the first the input of the subtracting amplifier, the second input of which is connected to the setting device, and the output - to the control input of the control unit generator 13.

.. The disadvantages of this device are its low accuracy and instability in operation due to analog elements, complexity, high inertia and narrow scope, limited by the CNC system with a coordinate number of 2-3.

A master device is known, consisting of a speed reference block, the output of which is connected to the input of an interpolator, whose outputs are sub-,

They are connected to the inputs of frequency meters made on the first to fourth frequency dividers, the outputs of which through the delay elements and elements are connected to the inputs of the triggers, the outputs of which are connected to the control inputs of the speed reference unit 2.

The disadvantages of this device are a large amount of electronic

10 equipment and the complexity of the technical implementation, as well as the limited scope of the use of CNC systems with the number of coordinates 2-3. .

The closest technical solution to the invention is a master device., Consisting of serially connected photo tape puncturers, an input unit, a master oscillator unit with an automatic acceleration and deceleration circuit, a frame time setting unit, a pulse distributor counter, which together with the units coordinates realizes an interpolator on

25 binary decimal multiplier and central control system Sz.

A disadvantage of the known device is the low accuracy determined by the principle of operation of the inter-

The 30 polors on the multipliers, which are characterized by a high non-uniformity of the pulse following and a low speed, are determined both by the presence of smoothing dividers and by the property of the binary-ten multiplier to reduce by ten times the output frequency compared to the clock frequency if higher bit; the larger of the coordinate transformations is one. i The aim of the invention is to increase the accuracy of the device. The goal is achieved by the fact that a programmed device containing a control unit, the first output of which is connected to the write enable input of a reference frequency setting block, a program frame testing frequency shaping unit, and an n-axis linear interpolator that triggers the input coe-v dinen, has a goal. with the second output of the control unit and with the start-up inputs of the reference frequency setting unit and the readout unit connected by output i to the input of the information distribution unit whose outputs are connected to information and insulating block inputs predetermined reference. frequency, the unit for forming the frequency of frame processing programs and .k. n-1 informative inputs of the n-coordinate of the linear interpolator, n-1 of the inputs of which are connected to the outputs of the device, and the output of the interpolation termination signal - to the control input of the control unit connected to the disconnecting input of the reading unit and to one from the outputs of the information distribution unit. Moreover, the output of the reference frequency setting block is connected to the clock input of the program frame shaping frequency block, the first trigger is inserted, the high-frequency generator and the first key are connected in series, and the buffer register, the second key block are the decoder, encoder and working register connected to the output To the information input of the n-coordinate linear interpolator, the nth output: of which is connected to the zero input of the first trigger connected by a single input and output, respectively To the output of the program frame shaping frequency block and to the control input of the first key connected by the output to the clock input of the n-coordinate linear interpolator, the input of the buffer register is connected to one of the outputs of the information distribution block, and the control input of the second key block is with the first control unit output. The control unit contains a two-bit shift register, the outputs of which are connected to the first and second outputs of the block, a control input to the output of the shift pulse generator, and a setup input to the output of the first element OR connected to the elements of the start element and to the outputs of the third and fourth keys, the first input of the third key is connected to the triggering input of the block, to the first input of the second element OR, and through, the first delay element - to the zero input of the second trigger, the unit output of which is connected to the second input of the third key a, and a single input member with preset and zero input of the third flip-flop unit the output of which is connected to a first input of the fourth switch, and a single input - with the output of the second. the OR element, the second input of which is connected via the second delay element by the iC control input of the block and to the second input of the fourth key. ; The essence of the invention lies in the fact that it is determined the value inverse of the frame processing time as follows. Let it be necessary to work out some; moving along 4X, remote control, AZ, YES, DV, DS, / 4W coordinates with a contour speed V. Then, the formula of the spatial vector L. is determined by the formula defined by the layout of a particular machine for which programming is performed, in the case of a Cartesian coordinate system , is the square root of the sum of squared elementary increments (in the case of using the angular coordinates, the formula is somewhat complicated). Then the frame rationing time is defined as squirrel size, and then the frequency of development of the frame, as the value, or, g V WHAT is the same,. . Let the volume of the counter-distributor involved in this frame be 100.000. The frequency fjy, alOOOOO, or .000 F must be applied to it. In real systems, this latter formula is used, since it can be easily realized with the help of a common binary-decimal multiplier. However, the use of an interpolator on binary-decimal multipliers with modern requirements (output frequency 200 kHz), taking into account the frequency reduction factor Is 10, due to the principle of interpol action, and 1–16 times due to the use of smoothing dividers, requires elements with a clock frequency of 200 kHz x10x16 32 MHz7 | which is practically impracticable. The use of interpolators built on the principle of the estimator function allows us to reject smoothing dividers and, therefore, enter the 2 MHz clock frequency range without compromising accuracy.

which is permissible, taking into account the speed of integrated elements (for example, the Kl55-ia MHz series). But interpolators constructed according to the principle of an estimator ,. They do not have a counter-distributor and do not contain interior lighting. Consequently, the direct use of the “K.G” formula is impossible (K-const in the previous example is 100.000).

Therefore, to combine the predominantly 10 tqecTBa interpolator, along the lines of it.

according to the method of evaluation function, and the method of setting the contour speed, which allows increasing the speed of multi-coordinate systems-15 by CNC in 20-16 times, their accuracy and expanding the scope and, moreover, corresponds to GOST 20999-75 (function G 93) , the device uses an interpolator based on the principle 20 of the evaluation function with feedback, the leading coordinate of which is entered by the number chosen by the programmer from 10 or 2 {depending on the numbering system received), 5 or more than 25 increments; specified in a particular frame. Indeed, let the priming on the X-LH lineage exceed all Ostapnye in this frame and is equal to 95,741. We select the constant .000. We calculate the frequency of the frame processing of the prrhramm according to the already known formula% gr 00.000 F and feed this frequency to the clock input of the interpolator with feedback. Taking into account the equality of frequencies at the clock input and the output of the leading coordinate (the main property of the interpolator with feedback), we find that in time for

t per clock interpolator input

100,000 pulses pass, and therefore the program frame is run

for it was required semi-45

to chit. Since the number K is chosen as the largest of the largest increments, then one I1 pulse in the leading coordinate or any other one is generated. on more than one pulse and, therefore, additional non-uniform, due to the effect of feedback is not. going on.

Fig. 1 shows a functional diagram of the device in Fig. 2, the control unit diagram.

The device contains a reading unit 1, a unit 2 for information distribution (HanpHN p, a decoder), a unit 3 for setting the reference frequency, a unit 4 for shaping the frequency of processing the program frame, n-axis linear

interpolator 5, control block 6, buffer register 7, second block 8

keys, decoder 9 encoder 10, 65

The working register 11, the first trigger 12, the high frequency generator 13 and the first key 14.

Block 6 contains the third trigger 15, the fourth key 16, the first element LI 17 / two-way long shift register 18, the third key 19, the second trigger 20, the first element 21 — delay, elements 22 and 23, respectively, of the preset and start, generator 24 of the shift pulses , the second delay element 25 and the second element OR 26.

The device works as follows.

The part work program is entered using block 1 and fed to the input of block 2, which is a decoder for alphanumeric combinations, including the LF combination end of the frame, which distributes the entered information in accordance with the addresses as follows. The value of F, equal to -, goes to block 4,

deceleration code T (if it is specified) in block 3, having the scheme times x it a: and deceleration, increment values AX, AY, D2, ..., L H in interpolator 5, coefficient number K to encode | " DS: 1e coefficients in register 7. At the end of the input frame, block 2 decodes the signal (end of frame) and shuffles the LF signal, which stops block 1 and starts block 6. If the first program frame was entered, block 6 immediately generates an IU1 signal, . which enters blocks 3 and 4 and interpolator 5, rewrites the entered information from the intermediate memory registers to the working memory (not shown), but enters block 8, connects the code of the coefficient number NK to the inputs of the decoder 9, at one of the outputs , corresponding to the Hottepy entered, a signal appears, pos.

the encoder 10 blunt on the input causes the code- appearance on its outputs; a combination corresponding to a given coefficient, which is written to register 11 (memory of the leading coordinate). For example, with,. A code 5 is entered into register 7, and a code 100.000 is written into register 11.

After this, block b generates a signal of the ICI, which, arriving at blocks 3 and interpolator 5, starts processing the program frame entered into the working memory and simultaneously turns on block 1, which, together with block 2, begins to enter information of the next frame into the registers of the intermediate block memory 3 and 4, Interporter 5 and 4 Register 7.

Claims (3)

The driving frequency from the output of block 3 is fed to the input of block 4, on the output of which the frequency f-K-F is formed, i.e. for the chosen specific K 100.000, forp 100.000F. The pulses of this frequency, arriving at the single input of the trigger 12, set it to 1, this opens the key 14 and the high frequency pulses of the generator 13 arrive at the clock input of the interpolator 5, which begins to work the specified frame, and the high frequency pulses go to its input as long as the output coordinate of the leading coordinate does not reach a pulse, the flip-flop in O is trigger 12. The next pulse from the output of block 4 again sets trigger 12. into 1 and turns on the high frequency. This continues from the end of frame processing, and since the frequencies at the output of the block h and at the output of the leading coordinate of the interpolator 5 are the same, and the testing ends when the output of the 11: 1 coordinate is. If the output is K pulses, it is obvious that the device implements the proposed method, since K pulses worked at the CD frequency give K 1 a time for working out, as required. The End of Frame / signal is generated by the interpolator 5 and enters the block a. 6, which generates the signals of PS1 and PS1I, and the work cycle repeats. the output signals of the other coordinates of the interpolator 5, as usual, arrive at the inputs of the communication device with the machine's signals (not shown). Block b works as follows (figure 2). Initially, the element of the preset button 22 is pressed and the trigger 15 is set .O and the trigger 20 is 1. After that, the start element (button) 23 is pressed and the Start signal through the element OR 17 is fed to the input of the register 18 and writes it to the lower bit 1 This unit is shifted by the frequency pulses of the generator 24, as a result of which at the outputs of the register 18 the pulses of the PS1 and the PDI are generated. By the third generator pulse 24, register 18 is zeroed. At the end of the frame entry, the End of Entry (LF) signal appears. If the entered frame is the first frame of the program, flip-flop 20 is in state 1, so this signal passes through the key 19 and through the OR element 17 to the input of the register 18 and starts generation of signals IU1, IU1I, and through element 21 resets trigger O into 20. If the entered program frame is not the first, the trigger 20 is in the state O and the key 19 is closed, therefore the LF signal only sets trigger 1 to 1. coming after oTpa6ot "and frame by interpolator, pass t via key 16, open with single output of trigger 15, and element OR 17 at input of register 18 and generates IU1, IUI signals, and through element 25 bounces trigger O into O. 15. Such logic allows the next frame to be turned on after If you have finished entering the information of the previous code. When entering the first frame, the start of its processing is carried out immediately after its input. The advantages of this technical solution are that, having the speed and accuracy of an interpolator working on the principle of the evaluation function, the proposed device for implementing the speed reference method allows coding using the G93 method , which is extremely important in multi-coordinate systems with the number of coordinates. More than 3, especially in a number of special machines, when using any other methods of speed setting is not It is possible. Claim 1. Software master device containing a control unit, the first output of which is connected to the recording resolution inputs of the reference frequency setting unit, the program frame developing frequency shaping unit. we have an ip-coordinate linear interpolator, launching an input whose coeOTiHeW with the second output of the control unit and with the starting inputs of the reference frequency setting block and the reading block connected by the output to the input of the information distribution unit, the outputs of which are connected to the information inputs of the reference frequency setting block, forming unit the frequencies of the program frame and to the n-1 information inputs of the n-coordinate linear interpolator, n-1 of which inputs are connected to the outputs of the device, and the signal output is about The interpolation reads are from the control input of the control unit connected by the trigger input to the shutdown input of the readout block and to one of the information distribution outputs, the output of the reference frequency setting block connected to the clock input of the program development frequency block of the program, different from that, in order to improve the accuracy of the device, the first trigger, serially connected generator of high frequency and the first and serially connected buffer register, block of second keys are entered into it, an encoder, Tiifrator and a working register connected by the output to the nth information input of the n-coordinate linear interpolator, the nth output of which with a zero input nejjBoro trigger connected by a single input and output respectively to the output of the frame frequency shaping unit the program and to the control input of the first key connected by the output to the clock input of the p-coordinate linear interpolator, the input of the buffer register is connected to one of the outputs of the information distribution block, and the control input of the block in oryh keys - the first output of the control unit. 2. The device according to claim 1, that is, so that the control unit contains a two-bit shift register, which is connected to the first and second outputs of the unit, the control input — to the output of the shift pulse generator, and the setup input is with the output of the first OR element connected by inputs to the trigger element and to the outputs of the third and fourth keys, the first input of the third key is connected to the starting input of the block, to the first input of the second OR element and through the first delay element to the zero input of the second trigger single cat slaughter The first is connected to the second input of the third key, and the single input to the presetting element and to the zero input of the third flip-flop, whose single output is connected to the first input of the fourth key, and the single input to the output of the second OR element, the second input of which through the second element the delays are related to the control input of the block and the second input, the fourth key. Sources of information taken into account in the examination 1.. Methods of preparing the program and interpolators for contouring systems for numerical control of machine tools .. M., M engineering industry, 1970, p. 86 2. In the same place 89 3. In the same place 71-84, rie. 34 (prototype). I t