CN201107641Y - Full digital numerical control system - Google Patents

Full digital numerical control system Download PDF

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Publication number
CN201107641Y
CN201107641Y CNU2007201178350U CN200720117835U CN201107641Y CN 201107641 Y CN201107641 Y CN 201107641Y CN U2007201178350 U CNU2007201178350 U CN U2007201178350U CN 200720117835 U CN200720117835 U CN 200720117835U CN 201107641 Y CN201107641 Y CN 201107641Y
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interface
programmable logic
logic device
pld
numerical control
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CNU2007201178350U
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Chinese (zh)
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高波
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Abstract

The utility model relates to a full-digital numerical-control system, in particular to a numerical control system, which resolves the problems that when the prior CNC and numerical control machine is communicated with the peripheral equipments, the insertion of the data transformation card is required and the control data are transformed twice through the A/D and D/A during the communication process. The numerical control system comprises a CNC, a USB2 receiving-transmitting device, a coder signal input interface, a current signal interface, a power driving interface and a programmable logic device, the USB serial communication port of the CNC is connected with the USB communication serial port of the programmable logic device through the USB 2 receiving-transmitting device, the signal output end of the coder signal input interface is connected with the coder signal input end of the programmable logic device, the current signal output end of the current signal interface is connected with the current signal input end of the programmable logic device, and the power driving signal output end of the programmable logic device is connected with the signal input end of the power driving interface. The full-digital numerical control system of the utility model can be applied to the control of the prior numerical control machine.

Description

Full digital numerical control system
Technical field
The utility model relates to digital control system.
Background technology
The machine tool numerical control system that one cover is complete is made of several big hardware such as numerical control device (NC), drive system and pick-up unit, and wherein major control and running part are numerical control device and servo-drive system.The tradition servo-drive system receives only simulating signal, therefore needs numerical control device (NC) output analog control signal.And real numerical control device based on PC, the control function that is CNC (Computerized Numerical Control) is realized by software, what CNC directly exported is digital signal, in order to export analog signals, also need on PC, additionally develop the D/A translation interface to servo-drive system.Along with microelectric technique and development of computer, the modern servo system turns to digitizing gradually, the CPU of Digital Servo System also can only receiving digital signals, therefore this digital servosystem also needs could receive through an A/D conversion control signal of CNC again, not only increased the hardware interface of digital control system, on the other hand, owing to passed through D/A and twice conversion of A/D, make the real-time command data of the position ring regulator output of CNC when being transferred to servo-drive system, produce error, can influence the control performance of motor, be difficult to realize the real-time high-precision machining control.In addition, analog quantity voltage is interfered easily, causes the cutter translational speed to produce fluctuation, and the finished surface of workpiece is rough.
The method that realizes Direct Digital control at present in digital control system mainly is a Fieldbus Control, but Fieldbus Based digital control system need be developed communication card equally on CNC, these integrated circuit boards must insert in the standard I SA/PCI slot of CNC, but ISA/PCI bus interface complexity, driver, hardware interface development difficulty are big, cost of development is higher, and the construction cycle is also longer.Also need servo-drive system that corresponding field-bus interface is provided simultaneously.And multiple fieldbus and depositing on the market, can not intercom mutually between the dissimilar fieldbus, be difficult to satisfy the requirement of open digital control system.
The utility model content
In order to solve in the existing digital control system, when CNC and numerically-controlled machine peripherals communicate to connect, need be in CNC grafting data conversion card and part control data in communication process, need problem through A/D and twice conversion of D/A, the utility model provides a kind of full digital numerical control system.
Full digital numerical control system, it comprises CNC1, USB2.0 transceiver 2, code device signal input interface 5, current signal interface 6, power drive interface 4 and programmable logic device (PLD) 3, the USB serial communication port of CNC1 is connected with the usb communication serial line interface of programmable logic device (PLD) 3 by USB2.0 transceiver 2, the signal output part of code device signal input interface 5 is connected with the code device signal input end of programmable logic device (PLD) 3, the current signal output end of current signal interface 6 is connected with the current signal input end of programmable logic device (PLD) 3, and the power drive signal output part of described programmable logic device (PLD) 3 is connected with the signal input part of power drive interface 4.
The utility model adopts programmable logic device (PLD) 3 as the main control chip, in described programmable logic device (PLD) 3, can solidify and peripheral interface control corresponding software, as: usb communication Control Software module, code device signal control module, current signal filtering control module and existing various servocontrol modules realize and USB2.0 transceiver 2 between carry out functions such as data transmission, servocontrol, code device signal and current signals.
Advantage of the present utility model has: one, the USB serial data communication interfacing of comparative maturity in the prior art that adopts full digital numerical control system realizes communicating by letter between CNC1 and the programmable logic device (PLD), realized pure digi-tal control, avoided the data conversion card of pegging graft in the standard I SA/PCI slot in PC in the existing digital control system fully, and control data needs the problem of the error that produces through twice A/D and D/A conversion in transmission course, also make the response speed of machine tool numerical control system faster, reliability is higher, can satisfy the higher demand in the machining better.Two, adopt programmable logic device (PLD) as core devices, can be integrated in programmable logic device (PLD), solidify multiple servocontrol nuclear, realize the dirigibility of control, the control command that can also send according to the CNC1 that the USB controller receives realizes intelligent flexibly control.
Description of drawings:
Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the various software modules of solidifying in the programmable logic device (PLD) 3 among Fig. 1 and the annexation synoptic diagram of peripheral hardware interface.
Embodiment:
Embodiment one: the full digital numerical control system of present embodiment comprises CNC 1, USB2.0 transceiver 2, code device signal input interface 5, current signal interface 6, power drive interface 4 and programmable logic device (PLD) 3, the USB serial communication port of CNC1 is connected with the usb communication serial line interface of programmable logic device (PLD) 3 by USB2.0 transceiver 2, the signal output part of code device signal input interface 5 is connected with the code device signal input end of programmable logic device (PLD) 3, the current signal output end of current signal interface 6 is connected with the current signal input end of programmable logic device (PLD) 3, and the power drive signal output part of described programmable logic device (PLD) 3 is connected with the signal input part of power drive interface 4.
In the programmable logic device (PLD) 3 of present embodiment, be solidified be used for and USB2.0 transceiver 2 between carry out data and transmit, the go forward side by side usb communication control module of serial/parallel conversion of line data, the control signal that is used for sending according to the usb communication controller is carried out servo-controlled servocontrol module to outside power device, the encoder output that is used for the transmission of received code device signal input interface also converts the code device signal input control module that position signalling and rate signal pass to usb communication controller and servo controller respectively to, is used for the current detecting control module that the signal that current signal interface 6 sends is carried out digital filtering and current measurement.
The servocontrol module of solidifying in the described programmable logic device (PLD) 3 can the more intense existing various servocontrol cores of integrated universal, for example: it can integrated vector controller, in torque controller, electric current demodulator, speed regulator, SVPWM demodulator or the like one or several, satisfies dissimilar numerically-controlled machine motion control demands to reach.
In the power drive interface 4 in the present embodiment, comprise photoelectric isolation module, strengthened the anti-interference of the described device of present embodiment.
Programmable logic device (PLD) 3 in the present embodiment adopts extensive on-site programmable gate array FPGA chip, and described fpga chip is selected XC2S200-5FG456C for use.
Present embodiment has adopted powerful programmable logic device (PLD), and usb communication controller and servo controller on this chip, have been solidified, when using, CNC1 sends by USB2.0 transceiver 2 and comprises that the various control commands of position control order are to programmable logic device (PLD) 3, programmable logic device (PLD) 3 obtains electric current and feedback speed signal by current signal interface 6 and code device signal input interface 5 respectively, sends drive control signal according to these signals to power drive interface 4 and realizes corresponding closed-loop control.
Embodiment two: the described full digital numerical control system of present embodiment is on the basis of embodiment one, increased analog quantity input interface 9, the analog signals output terminal of described analog quantity input interface 9 is connected with the analog signals input end of programmable logic device (PLD) 3.
The described programmable logic device (PLD) of present embodiment 3 inside have the A/D module, the analog signal conversion of outside input can be become digital signal.
Embodiment three: the described full digital numerical control system of present embodiment is on embodiment one or two basis, increased analog output interface circuit 8, the analog signals input end of described analog output interface circuit 8 is connected with the analog signals output terminal of programmable logic device (PLD) 3.
The described programmable logic device (PLD) of present embodiment 3 inside have the D/A module, can convert the digital signal of CNC1 output to simulating signal and output to the outside.
Embodiment four: present embodiment is to have increased stepper motor interface 7 on embodiment one or two or three described full digital numerical control systems, and the stepper motor pulse signal output end of stepper motor interface 7 and programmable logic device (PLD) 3 is connected.
In the described programmable logic device (PLD) 3 of present embodiment, solidified and be used for information generation that sends according to CNC1 and the pulse signal generation module of exporting the pulse signal that is used for the drive controlling stepper motor.
Present embodiment has increased the pulse signal generator function of control step motor operation, can control stepper motor.

Claims (4)

1, full digital numerical control system, it is characterized in that it comprises CNC (1), USB2.0 transceiver (2), code device signal input interface (5), current signal interface (6), power drive interface (4) and programmable logic device (PLD) (3), the USB serial communication port of CNC (1) is connected with the usb communication serial line interface of programmable logic device (PLD) (3) by USB2.0 transceiver (2), the signal output part of code device signal input interface (5) is connected with the code device signal input end of programmable logic device (PLD) (3), the current signal output end of current signal interface (6) is connected with the current signal input end of programmable logic device (PLD) (3), and the power drive signal output part of described programmable logic device (PLD) (3) is connected with the signal input part of power drive interface (4).
2, full digital numerical control system according to claim 1 is characterized in that it also comprises analog quantity input interface (9), and the analog signals output terminal of described analog quantity input interface (9) is connected with the analog signals input end of programmable logic device (PLD) (3).
3, full digital numerical control system according to claim 1 is characterized in that it also comprises analog output interface circuit (8), and the analog signals input end of described analog output interface circuit (8) is connected with the analog signals output terminal of programmable logic device (PLD) (3).
4, full digital numerical control system according to claim 1 is characterized in that it also comprises stepper motor interface (7), and stepper motor interface (7) is connected with the stepper motor pulse signal output end of programmable logic device (PLD) (3).
CNU2007201178350U 2007-12-28 2007-12-28 Full digital numerical control system Expired - Fee Related CN201107641Y (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102402203A (en) * 2011-11-14 2012-04-04 配天(安徽)电子技术有限公司 System and method for controlling numerical control machine
CN102426437A (en) * 2011-11-26 2012-04-25 江苏苏大天宫创业投资管理有限公司 Open numerical control system
CN108829018A (en) * 2018-08-13 2018-11-16 上海瑞伯德智能系统股份有限公司 A kind of numerical control customization machine operation panel USB interface device
CN108994925A (en) * 2018-07-23 2018-12-14 杰克缝纫机股份有限公司 Integrated board based on high-rise cutting, the cutting system with integrated peripheral hardware

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102402203A (en) * 2011-11-14 2012-04-04 配天(安徽)电子技术有限公司 System and method for controlling numerical control machine
CN102402203B (en) * 2011-11-14 2014-09-17 配天(安徽)电子技术有限公司 System and method for controlling numerical control machine
CN102426437A (en) * 2011-11-26 2012-04-25 江苏苏大天宫创业投资管理有限公司 Open numerical control system
CN108994925A (en) * 2018-07-23 2018-12-14 杰克缝纫机股份有限公司 Integrated board based on high-rise cutting, the cutting system with integrated peripheral hardware
CN108829018A (en) * 2018-08-13 2018-11-16 上海瑞伯德智能系统股份有限公司 A kind of numerical control customization machine operation panel USB interface device

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C17 Cessation of patent right
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Granted publication date: 20080827

Termination date: 20111228