KR930009405B1 - Speed changing circuit for servo unit - Google Patents

Speed changing circuit for servo unit Download PDF

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Publication number
KR930009405B1
KR930009405B1 KR1019900015846A KR900015846A KR930009405B1 KR 930009405 B1 KR930009405 B1 KR 930009405B1 KR 1019900015846 A KR1019900015846 A KR 1019900015846A KR 900015846 A KR900015846 A KR 900015846A KR 930009405 B1 KR930009405 B1 KR 930009405B1
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circuit
resistor
comparator
input
speed command
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KR1019900015846A
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Korean (ko)
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KR920007747A (en
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김인수
안병무
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주식회사 기아기공
김성응
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Numerical Control (AREA)

Abstract

The spindle-servo velocity direction conversion circuit comprises the polarity conversion circuit which is composed of the input resistance (R1,R2), feedback resistor (R1), and comparator (OP1); the peripheral circuit of the parallel feedback circuit including the input resistor (R4,R7), the variable resistor (VR1); the gain control circuit (2) composed of the comparator (OP3) and the peripheral circuits; the offset control circuit (2) composed of the resistor (R6), variable resistor (VR2), input-output resistor (R9,R11) and feedback resistor (R10). The gain control circuit (2) prevents the sudden change of waveform by employing a parallel feedback circuit.

Description

스핀들 서보속도지령 변환회로Spindle Servo Speed Command Conversion Circuit

제 1 도는 본 발명의 속도지령변환회로 블록도.1 is a block diagram of a speed command conversion circuit of the present invention.

제 2 도는 본 발명의 상세회로도.2 is a detailed circuit diagram of the present invention.

제 3 도는 바이폴러 속도지령 방식의 일예시도.3 is an exemplary view of a bipolar speed command method.

제 4 도는 유니폴러 속도지령방식의 일예시도.4 is an exemplary diagram of a unipolar speed command method.

제 5 도는 종래 수치제어장치의 시스템 구성도.5 is a system configuration diagram of a conventional numerical control device.

제 6 도는 본 발명에 의한 수치제어장치의 시스템 구성도.6 is a system configuration diagram of the numerical control device according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 극성전환회로 2 : 이득제어회로1: polarity switching circuit 2: gain control circuit

3 : 옵셋조정회로 CNC : 수치제어장치3: Offset adjustment circuit CNC: Numerical control device

CMD : 지령단(COMMAND) GND : 접지단CMD: Command GND: Ground

DiR : 방향 (DiRECTiON)설정단 OP1, OP3: 비교기DiR: Direction (DiRECTiON) setting stage OP 1 , OP 3 : Comparator

R1, R11: 저항 VR1, VR2: 가변저항R 1 , R 11 : resistance VR 1 , VR 2 : variable resistance

C1, C2: 콘덴서C 1 , C 2 : condenser

본 발명은 공작기계의 스핀들서보속도지령 변환회로에 대한 것이다.The present invention relates to a spindle servo speed command conversion circuit of a machine tool.

일반적으로 메이커(기종)가 다른 CNC장치와 스핀들, 서보(SERVO) 유니트간에 속도지령 방식이 다를 경우에는 이들의 인터페이스(INTERFACE)가 불가능하다(속도지령방식 및 속도지령 MAX, 전압이 다른 경우) 즉, 제 3 도의 예시와 같이 바이폴러(Bipolar)속도지령방식의 경우는 CNC에서 +V출력시에는 모터가 정회전을 실시하고, -V 출력시에는 역회전을 실시하게 되지만, 제 4 도의 경우와 같은 유니폴러(Unipolar) 속도지령방식의 경우는 CNC에서 DiR출력이 "오프"일때는 모토가 정회전을 실시하고, "온"시에는 모터가 역회전을 하도록 되어 있다.(여기서 지령전압은 항상 +V로 출력됨) 위의 2가지 속도지령 방식에서 만일 CNC의 속도지령 출력이 유니폴러 방식이고, 서보유니트의 속도지령 입력이 바이폴러 방식일 경우라면 이 기계는 서로의 접속이 불가능해지는 것이다(주로 다른 메이커의 CNC와 서보간에 시스템을 구성할 경우)In general, if the speed command method is different between different CNC machines, spindles, and servo units of different manufacturers (models), these interfaces cannot be used (speed command method, speed command MAX, and voltage are different). As in the example of FIG. 3, in the case of the bipolar speed command method, the motor rotates forward at + V output from the CNC, and reverse rotation at -V output. In the case of the same unipolar speed command method, when the DiR output is "off" in the CNC, the motor performs forward rotation, and when it is "on", the motor rotates in reverse (where the command voltage is always In the above two speed command methods, if the speed command output of the CNC is unipolar and the speed command input of the servo unit is bipolar, the machines cannot be connected to each other. mainly When configuring the system between CNC and servo from another manufacturer)

또한 속도지령방식이 같은 경우라도 MAX, 속도지령전압이 다를 경우(예 : CNC측 ; MAX, 10V, 서보측 ; MAX, 5V)에는 상호 접속이 불가능해지는 것이다.In addition, even if the speed command method is the same, if the MAX and the speed command voltage are different (e.g. CNC side; MAX, 10V, servo side; MAX, 5V), interconnection becomes impossible.

본 발명은 위와 같은 종래의 제반문제점을 감안하여 공작기계에 사용되는 수치제어장치(CNC)의 시스템(SYSTEM) 구성시 CNC와 서보유니트간에 아날로그속도지령방식이 다를 경우에도 서로 호환성 있게 사용할 수 있는 속도지령 방식 변환회로를 제공할 목적으로 안출한 것으로 이를 첨부회로 도면에 의거 상세히 설명하면 다음과 같다.The present invention can be used interchangeably even when the analog speed command method is different between the CNC and the servo unit when configuring the system of the numerical control device (CNC) used in a machine tool in view of the above-mentioned conventional problems. In order to provide a command type conversion circuit, the present invention will be described in detail with reference to the accompanying circuit drawings.

제 1 도의 블록도와 같이 본 발명의 속도지령변환회로는 극성전환회로(1)와 이득제어회로(2)와 옵셋조정회로(3)로 구성되며, 이들 제 6 도와 같이 CNC장치와 서보유니트사이에 매개시켜 서로다른 기종의 CNC장치와 서보장치간에도 직접적인 인터페이스가 가능토록 한 것으로, CNC장치와 연결되는 극성전환회로(1)는 한개의 비교기(OP1)와 그 주변의 저항회로로 구성되는데 비교기(OP1)의 -입력단자에 연결되는 입력저항(R1)과 궤환저항(R3)은 그 저항값이 같게 설정되면, +입력단자에 연결되는 압력 저항(R2)도 상기의 저항들과 같은 저항값을 갖도록 설정되며 저항(R1)(R2)의 입력측은 CNC장치의 지령단(CMD)에 연결되며, 방향설정단(Dir)은 저항(R2)과 비교기(OP1)의 +입력단자 사이에 접속된다.As shown in the block diagram of FIG. 1, the speed command converting circuit of the present invention comprises a polarity switching circuit 1, a gain control circuit 2, and an offset adjustment circuit 3, and as shown in FIG. 6, between the CNC device and the servo unit. It is possible to directly interface between different types of CNC devices and servo devices by means of a medium. The polarity switching circuit 1 connected to the CNC device consists of one comparator (OP 1 ) and a resistance circuit around it. If the input resistance (R 1 ) and the feedback resistor (R 3 ) connected to the − input terminal of OP 1 ) are set to the same resistance value, the pressure resistance (R 2 ) connected to the + input terminal is also equal to the above resistances. It is set to have the same resistance value and the input side of the resistor (R 1 ) (R 2 ) is connected to the command terminal (CMD) of the CNC machine, and the direction setting stage (Dir) of the resistor (R 2 ) and the comparator (OP 1 ). Connected between + input terminals.

이득제어회로(2)는 한개의 비교기(OP2)와 저항 및 콘덴서로 구성되는 주변회로로 이루어지는 반전회로로써 비교기(OP2)의 -입력단자에는 비교기(OP1)의 출력단과 연결되는 입력 저항(R4)이 접속되며, 또한 콘덴서(C1)와 저항(R5)(R6), 가변저항(VR1)의 병렬 궤환회로가 접속되고 비교기(OP2) 출력은 저항(R7)을 통하여 옵셋조정회로(3)로 입력된다.A gain control circuit (2) is one of the comparator (OP 2) and the resistor, and a comparator (OP 2) as an inverting circuit comprising a peripheral circuit composed of a capacitor-input an input terminal connected to the output terminal of the comparator (OP 1) resistance (R 4 ) is connected, and a parallel feedback circuit of a capacitor (C 1 ), a resistor (R 5 ) (R 6 ), a variable resistor (VR 1 ) is connected, and the comparator (OP 2 ) output is a resistor (R 7 ). Input to the offset adjustment circuit (3) through.

옵셋조정회로(3)는 한개의 비교기(OP3)와 저항과 콘덴서로 구성되는 주변회로로 이루어지는 서보모터의 완전정지를 위한 조정회로로써, 비교기(OP3)의 -입력단자에는 이득제어회로(2)의 출력단이 저항(R8)을 거쳐 접속되며, 전압단과 연결된 가변저항(VR2)이 저항(R9)을 거쳐 입력되도록 되어 있다.The offset adjustment circuit 3 is an adjustment circuit for the complete stop of the servo motor composed of one comparator OP 3 and a peripheral circuit composed of a resistor and a condenser. A gain control circuit is provided at the −input terminal of the comparator OP 3 . The output terminal of 2) is connected via the resistor R 8 , and the variable resistor VR 2 connected to the voltage terminal is input through the resistor R 9 .

+입력단자는 접지되어 있으며, 출력단은 저항(R11)을 거쳐 서보유니트의 전압단으로 연결되며, 이 비교기(OP3)에는 콘덴서(C2)와 저항(R10)의 병렬 궤환회로가 설치되어 있다.The input terminal is grounded and the output terminal is connected to the voltage terminal of the servo unit via a resistor (R 11 ). This comparator (OP 3 ) is equipped with a parallel feedback circuit of capacitor (C 2 ) and resistor (R 10 ). It is.

이와 같이 구성된 본 발명의 작용, 효과를 설명하면, 제 2 도의 예시회로에서와 같이 CNC장치의 지령단(CND)에서 출력되는 속도지령단일전압(+V)이 저항(R1)을 거쳐 비교기(OP1)의 -입력단자에 입력되면, 그의 +입력단자에 연결된 방향 설정단(DiR)에서 출력되는 방향선택신호에 의하여 비교기(OP1)의 출력단에는 -V전압이 출력되게 된다.Referring to the operation and effect of the present invention configured as described above, as shown in the example circuit of FIG. 2, the speed command single voltage (+ V) outputted from the command terminal CND of the CNC apparatus passes through the resistor R 1 and the comparator ( of OP 1) - is input to the input terminal, by a direction selection signal output from his + orientation stage (DiR) connected to the input terminal, an output terminal of the comparator (OP 1) is presented, the output voltage -V.

즉 전압의 극성이 바뀌게 된다.That is, the polarity of the voltage is changed.

이때 회로의 이득은 R3/R1가 되는데 본 회로에서는 이들의 저항값이 서로 같게 설정되어 있는 관계로 그 이득은 1이 되므로 방향설정단(DiR)이 "온"일 경우, 비교기(OP1)의 +입력단자가 접지되므로 이때 출력전압은 반전되는 것이며, 만일 이 방향설정단(DiR)이 "오프"상태일 경우에는 비반전 회로가 되어 등가회로가 구성이 되며, 이때의 회로이득은 1+R3/R1가 되므로, 출력쪽에서 본 저항(R1)의 값이 ∞이므로 역시 회로이득은 1로써 출력전압은 입력전압과 동일한 관계가 된다.At this time, the gain of the circuit becomes R 3 / R 1. In this circuit, since their resistance values are set equal to each other, the gain becomes 1, so when the direction DiDi is "on", the comparator OP 1 Since the + input terminal of) is grounded, the output voltage is inverted at this time. If this direction setting terminal (DiR) is in the "off" state, it becomes a non-inverting circuit and an equivalent circuit is constructed. Since + R 3 / R 1 , the value of the resistor R 1 seen from the output side is ∞, so the circuit gain is 1 and the output voltage has the same relationship with the input voltage.

한편, 극성전환회로(1)에서 출력된 전압(-V)은 저항(R4)을 거쳐 이득제어회로(2)의 비교기(OP2)의 -입력단자로 입력되게 되는데 이 전압은 다시 가변저항(VR1)의 조정에 의하여 약 0.6-1.4의 이득이 조정되어 반전출력된다.On the other hand, the voltage (-V) output from the polarity switching circuit (1) is input to the-input terminal of the comparator (OP 2 ) of the gain control circuit 2 via the resistor (R 4 ), which is again a variable resistor By adjusting (VR 1 ), the gain of about 0.6-1.4 is adjusted and inverted.

즉, 여기서 조정되는 회로이득은 R5//(R6+VR1)/R4의 크기로 산출된다.That is, the circuit gain adjusted here is calculated as R 5 // (R 6 + VR 1 ) / R 4 .

저항(R5)의 주된 역활은 가변저항(VR1)이 가변부 접촉불량시 이득이 ∞로 되어 모터가 최대 회전속도로 폭주하는 것을 방지하는 역할을 한다. 비교기(OP2)에서 출력된 반전전압은 저항(R7)을 거쳐 옵셋조정회로(3)로 입력되게 되는데 여기서는 비교기(OP3)의 반전입력단자에 입력되는 신호의 기준점을 변화시켜 "0"레벨을 정확하게 유지토록함으로써 CNC장치에서 지령단(CMD)을 통하여 OV를 지령하였을때 서보모터가 완전하게 정지할 수가 있게 되는 것이다.The main role of the resistor R 5 is to prevent the motor from runaway at the maximum rotational speed because the gain of the variable resistor VR 1 becomes ∞ when the variable part is in poor contact. The inverting voltage output from the comparator OP 2 is input to the offset adjusting circuit 3 through the resistor R 7. Here, the reference point of the signal input to the inverting input terminal of the comparator OP 3 is changed to " 0 ". By maintaining the level accurately, the servomotor can be stopped completely when OV is commanded through the command stage (CMD) in the CNC system.

상기 회로에서 콘덴서(C1)(C2)의 역활은 파형의 급격한 변화를 막아주는 역활을 한다.The role of the capacitor C 1 (C 2 ) in the circuit serves to prevent the abrupt change of the waveform.

이와 같이 본 발명은 공작기계에 사용되는 수치제어장치의 시스템 구성시 다른 기종(속도지령방식이라는 경우)의 서보장치의 경우도 직접인터페이스가 가능하도록 하여 기계상호간의 호환성 문제를 해결한 그 실사용가치가 일층 고양된 신규의 발명인 것이다.As described above, the present invention solves the compatibility problem between machines by directly interfacing the servo devices of other models (in the case of speed command method) in the system configuration of the numerical control device used for the machine tool. Is a novel invention further enhanced.

Claims (3)

공작기계의 CNC장치와 서보유니트간의 직접인터 페이스를 위한 속도지령 변환회로를 구성함에 있어서, 입력저항(R1)(R2)과 궤환저항(R3)의 주변회로와 비교기(OP1)로 이루어지는 극성전환회로(1)와, 입출력저항(R4)(R7)과 저항(R5)(R6), 가변저항(VR1)으로 구성된 병렬 궤환회로의 주변회로와 비교기(OP2)로 이루어지는 이득 제어회로(2)를 저항(R8)을 통해 가변저항(VR2), 입출력저항(R9)(R11), 궤환저항(R10)의 주변회로와 비교기(OP3)로 이루어지는 옵셋조정회로(3)에 연결 구비시켜서된 스핀들, 서보속도지령 변환회로.In constructing the speed command conversion circuit for the direct interface between the CNC machine of the machine tool and the servo unit, the peripheral circuits of the input resistors (R 1 ) (R 2 ) and feedback resistor (R 3 ) and the comparator (OP 1 ) Peripheral circuit and comparator (OP 2 ) of the parallel feedback circuit composed of a polarity switching circuit 1, an input / output resistor R 4 , R 7 , a resistor R 5 , R 6 , and a variable resistor VR 1 . a gain control circuit (2) comprising a through a resistor (R 8) a variable resistor (VR 2), input and output resistance (R 9) (R 11) , a peripheral circuit and a comparator (OP 3) of the feedback resistor (R 10) A spindle and servo speed command conversion circuit provided in connection with an offset adjustment circuit (3). 제 1 항에 있어서, 이득제어회로(2)가 병렬 궤환회로에 콘덴서(1)를 연결하여 파형의 급격한 변화를 방지토록 함을 특징으로 하는 스핀들 서보속도지령 변환회로.The spindle servo speed command converting circuit according to claim 1, characterized in that the gain control circuit (2) connects the capacitor (1) to the parallel feedback circuit to prevent sudden changes in the waveform. 제 1 항에 있어서, 옵셋 조정회로(3)의 궤환 저항(R10)에 콘덴서(C2)를 병렬 연결하여 파형 급격한 변화를 방지토록 함을 특징으로 하는 스핀들 서보속도지령 변환회로.The spindle servo speed command converting circuit according to claim 1, characterized in that a capacitor (C 2 ) is connected in parallel to the feedback resistor (R 10 ) of the offset adjustment circuit (3) to prevent sudden changes in waveform.
KR1019900015846A 1990-10-05 1990-10-05 Speed changing circuit for servo unit KR930009405B1 (en)

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KR930009405B1 true KR930009405B1 (en) 1993-10-04

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