WO2015071991A1 - サーボコントローラ - Google Patents
サーボコントローラ Download PDFInfo
- Publication number
- WO2015071991A1 WO2015071991A1 PCT/JP2013/080790 JP2013080790W WO2015071991A1 WO 2015071991 A1 WO2015071991 A1 WO 2015071991A1 JP 2013080790 W JP2013080790 W JP 2013080790W WO 2015071991 A1 WO2015071991 A1 WO 2015071991A1
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- WIPO (PCT)
- Prior art keywords
- drive circuit
- controller
- output signal
- servo controller
- time
- Prior art date
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/402—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2609—Process control
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34013—Servocontroller
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34027—Dual servo controller, for two motors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41173—Delay of compensation output signal as function of sampling and computation time
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41431—Delay position command as function of calculation time for feedforward, or order of system
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/42—Servomotor, servo controller kind till VSS
- G05B2219/42019—Pi for position controller
Definitions
- the present invention relates to a servo controller capable of transmitting and receiving an input signal from a drive circuit corresponding to an operating device of a manufacturing work machine or an output signal to the drive circuit at predetermined intervals.
- the servo controller controls the operation of the servo motor, and the servo motor feeds back a control state such as position information to the servo controller. Then, the servo controller calculates a control value of the servo motor based on the fed back information, and the calculated control value is transmitted to the drive circuit of the servo motor.
- the servo controller can transmit and receive an input signal from the drive circuit or an output signal to the drive circuit at every predetermined period. For this reason, as described in the following patent document, the servo controller controls the control value, that is, the output based on the information regarding the control state of the servo motor acquired immediately before, that is, the input signal received within one cycle. Calculate the signal. Then, the servo controller transmits the calculated control value to the drive circuit after holding it for a time shorter than one cycle or without holding it. As a result, the servo motor operates according to the control value.
- an output signal is calculated based on the input signal acquired immediately before, and the output signal is driven after being held for a time shorter than one cycle or without being held. Sent to the circuit. As a result, the time from when position information or the like is output until the control command corresponding to the position information reaches the drive circuit (hereinafter sometimes referred to as “delay time”) is shortened, and the response is good.
- the servo motor can be operated.
- the operating device of the manufacturing work machine includes an operating device that can be shared by a plurality of manufacturing work machines, such as a work head, and the control cycle of the controllers of the plurality of manufacturing work machines is different. May have their shared actuators operating at unexpected times.
- a work head can be attached to and detached from each of a first manufacturing work machine having a servo controller having a control cycle of X cycles and a second manufacturing work machine having a servo controller having a control cycle of Y (> X) cycles.
- the delay time in the first manufacturing work machine is shorter than the delay time in the second manufacturing work machine.
- the work head mounted on the first manufacturing work machine operates with a higher response than when the work head is mounted on the second manufacturing work machine.
- the work head mounted on the first manufacturing work machine starts to operate at a faster timing than when the work head is mounted on the second manufacturing work machine.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a highly practical servo controller.
- a servo controller configured to input an input signal from a drive circuit corresponding to an operating device of a manufacturing work machine or an output signal to the drive circuit at predetermined intervals.
- a servo controller capable of transmitting and receiving, calculating an output signal based on an input signal received before the predetermined period, and storing the output signal for a time equal to or longer than the predetermined period, It transmits to a drive circuit, It is characterized by the above-mentioned.
- an input signal from the drive circuit or an output signal to the drive circuit is a second period longer than the predetermined period.
- the second servo controller capable of transmitting and receiving each time calculates the output signal based on the input signal received within the second period and stores the output signal for a time shorter than the second period Or the time from the timing at which the drive circuit transmits an input signal to the servo controller to the timing at which the drive circuit receives the output signal from the servo controller without being stored
- the drive circuit Characterized in that the output signals from the turbo controller is the same as the time until the timing of receiving.
- the servo controller according to the first or second aspect, wherein the input from a second drive circuit corresponding to a second operating device different from the operating device of the manufacturing work machine.
- a signal or an output signal to the second drive circuit can be transmitted and received at each predetermined period, and an output signal is calculated based on the input signal received within the predetermined period, and the output signal Is transmitted to the second drive circuit after being stored for a time shorter than the predetermined period or without being stored.
- the operating device is a work head, and the second operating device moves the work head to an arbitrary position. It is characterized by being a moving device.
- the output signal is calculated not based on the input signal received immediately before but based on the input signal received before one cycle.
- the output signal is transmitted to the drive circuit after being stored for a time shorter than one cycle or without being held.
- the output signal is After being stored for one cycle or more, it is transmitted to the drive circuit.
- the delay time in the first manufacturing work machine is the same as the delay time in the second manufacturing work machine. Therefore, it becomes possible to make the operation timing of the operating device mounted on the first manufacturing work machine the same as the operating timing of the operating device mounted on the second manufacturing work machine, and other devices of the operating device, etc. It is possible to prevent collisions and shocks.
- the second actuator is controlled according to a conventional method. That is, the servo controller controls the actuator according to the technique of the present invention, and controls the second actuator according to the conventional technique.
- an operating device that may cause a collision, buffering, or the like with other devices due to a reduction in delay time is controlled according to the technique of the present invention, and a collision, buffering, etc. with other devices due to a reduction in delay time.
- the operating device is a work head
- the second operating device is a moving device for moving the work head to an arbitrary position.
- Some work heads have a mechanism for moving a work tool or the like in the vertical direction, and there is a risk that the work tool or the like may collide with other devices or the like due to the operation of the work head.
- some moving devices move the work head on the same plane, and such a moving device is unlikely to cause collision, buffering, or the like. For this reason, according to the servo controller of the fourth aspect, it is possible to prevent the working head from colliding with other devices, buffering, etc., and to operate the moving device with good response.
- FIG. 1 It is a perspective view which shows an electronic component mounting apparatus provided with the controller which is an Example of this invention. It is a perspective view which shows the mounting head with which the electronic component mounting apparatus of FIG. 1 is provided. It is a block diagram which shows the control apparatus with which the electronic component mounting apparatus of FIG. 1 is provided. It is a figure which shows typically the aspect of transmission / reception of the signal of the conventional controller and a drive circuit. It is a figure which shows typically the aspect of transmission / reception of the signal of the controller with which the electronic component mounting apparatus of FIG. 1 is provided, and the drive circuit of a moving apparatus. It is a figure which shows the movement trace of the electronic component with which a circuit board is mounted
- FIG. 1 shows an electronic component mounting apparatus 10.
- the electronic component mounting apparatus 10 has one system base 12 and two mounting machines 16 arranged side by side on the system base 12.
- the direction in which the mounting machines 16 are arranged is referred to as the X-axis direction
- the horizontal direction perpendicular to the direction is referred to as the Y-axis direction
- the vertical direction perpendicular to the direction is referred to as the Z-axis direction.
- Each mounting machine 16 mainly includes a mounting machine main body 20, a transport device 22, a mounting head moving device (hereinafter sometimes abbreviated as “moving device”) 24, a mounting head 26, and a supply device 28.
- the mounting machine main body 20 includes a frame portion 30 and a beam portion 32 that is overlaid on the frame portion 30.
- the transport device 22 includes two conveyor devices 40 and 42.
- the two conveyor devices 40 and 42 are disposed in the frame portion 30 so as to be parallel to each other and extend in the X-axis direction.
- Each of the two conveyor devices 40 and 42 conveys a circuit board supported by the conveyor devices 40 and 42 in the X-axis direction by an electromagnetic motor (see FIG. 3) 46.
- the circuit board is fixedly held by a board holding device (see FIG. 3) 48 at a predetermined position.
- the moving device 24 is an XY robot type moving device.
- the moving device 24 includes an electromagnetic motor (see FIG. 3) 52 that slides the slider 50 in the X-axis direction and an electromagnetic motor (see FIG. 3) 54 that slides in the Y-axis direction.
- a mounting head 26 is attached to the slider 50, and the mounting head 26 moves to an arbitrary position on the frame unit 30 by the operation of the two electromagnetic motors 52 and 54.
- the mounting head 26 mounts electronic components on the circuit board. As shown in FIG. 2, the mounting head 26 includes a plurality of rod-shaped mounting units 60, and a suction nozzle 62 is mounted at the tip of each of the plurality of mounting units 60.
- the suction nozzle 62 communicates with a positive / negative pressure supply device (see FIG. 3) 66 via negative pressure air and positive pressure air passages.
- the suction nozzle 62 sucks and holds the electronic component with a negative pressure, and releases the held electronic component with a positive pressure.
- the plurality of rod-shaped mounting units 60 are held on the outer periphery of the unit holding body 68 in a state where the axial direction is vertical at an equiangular pitch, and the suction nozzle 62 extends from the lower surface of the unit holding body 68. It extends downward.
- the unit holder 68 is intermittently rotated at every installation angle of the mounting unit 60 by an electromagnetic motor (see FIG. 3) 72 of the holder rotating device 70.
- the mounting units 60 are sequentially stopped at the lifting / lowering station (the station located at the foremost position) that is one of the stop positions of the plurality of mounting units 60.
- the mounting unit 60 located at the lifting station is lifted and lowered by an electromagnetic motor (see FIG. 3) 76 of the unit lifting device 74.
- a stop position different from the elevating station is set as the rotation station, and the mounting unit 60 positioned at the station is rotated by the electromagnetic motor (see FIG.
- the mounting head 26 is detachable from the slider 50 and can be mounted on a slider of a mounting machine different from the mounting machine 16. That is, the mounting head 26 can be shared by the mounting machine 16 and other mounting machines.
- the supply device 28 is a feeder-type supply device, and is disposed at the front end of the frame portion 30.
- the supply device 28 has a tape feeder 86.
- the tape feeder 86 accommodates the taped component in a wound state.
- the taped component is a taped electronic component.
- the tape feeder 86 sends out the taped parts by a delivery device 88 (see FIG. 3).
- the feeder type supply device 28 supplies the electronic component at the supply position by feeding the taped component.
- the tape feeder 86 can be attached to and detached from the frame unit 30 and can be used for replacement of electronic components.
- the mounting machine 16 further includes a control device 100 as shown in FIG.
- the control device 100 includes a controller 102, and the controller 102 includes a CPU, a ROM, a RAM, and the like, and is mainly a computer.
- the controller 102 is connected to a plurality of drive circuits 106.
- the plurality of drive circuits 106 are the electromagnetic motors 46, 52, 54, 72, 76, 80, the substrate holding device 48, the positive / negative pressure supply device 66, and the delivery. Connected to device 88. Thereby, the operations of the transport device 22 and the moving device 24 are controlled by the controller 102.
- the mounting operation can be performed by the mounting head 26 on the circuit board held by the transport device 22 with the above-described configuration. Specifically, the circuit board is transported to the work position according to a command from the controller 102, and is fixedly held by the board holding device 48 at that position. Further, the tape feeder 86 sends out a taped component and supplies an electronic component at a supply position in accordance with an instruction from the controller 102. Then, the mounting head 26 moves above the electronic component supply position in accordance with a command from the controller 102, and the electronic component is sucked and held by the suction nozzle 62.
- the mounting head 26 moves above the circuit board according to a command from the controller 102. Then, the mounting head 26 adjusts the vertical position of the electronic component held, the holding posture of the electronic component, etc. by the operation of the unit elevating device 74, the rotation device 78, etc., and puts it at a predetermined position on the circuit board. Installing.
- the mounting machine 16 controls the position of the mounting head 26 in the X-axis direction and the Y-axis direction by the moving device 24 and mounts the suction nozzle 62 by the mounting head 26 in the Z-axis direction when mounting the electronic component.
- Position control is performed. In this position control, feedback control is used, information on the position in each axial direction is acquired from an encoder or the like, and a control value of an electromagnetic motor or the like is calculated based on the position information. Then, a control command corresponding to the control value is transmitted to the drive circuit, so that the target electromagnetic motor is operated, and position control of the mounting head 26, the suction nozzle 62, and the like is performed.
- the position control based on feedback control it is possible to appropriately move the mounting head 26, the suction nozzle 62, and the like to the target position, and it is possible to appropriately perform the mounting operation.
- the time from when the position information is output from the encoder or the like until the control command corresponding to the position information reaches the drive circuit (hereinafter sometimes referred to as “delay time”) Therefore, there is a possibility that control delay occurs and control becomes unstable. For this reason, in the mounting machine 16, the controller 102 having a shorter control cycle than that of the conventional controller is adopted to improve the control delay.
- the control cycle of the conventional controller is the A cycle.
- the conventional controller transmits and receives an input signal from the drive circuit or an output signal to the drive circuit every A cycle.
- the controller for example, when information related to position information is output from the drive circuit at time t 1 , the information is input to the controller at time t 2 via the transmission line.
- the controller that has received the position information as an input signal calculates a control value of the electromagnetic motor based on the position information. That is, the controller calculates the control value based on the input signal acquired within one cycle. Then, after storing the calculated control value for a time shorter than the A period or without storing it, the controller transmits a control command corresponding to the control value at time t 3 .
- Control command is transmitted as an output signal via a transmission path, is input to the time t 4 to the drive circuit.
- the drive circuit controls the operation of the electromagnetic motor based on the control command.
- the control cycle of the controller 102 of the mounting machine 16 is an A / 2 cycle, which is half the control cycle of the conventional controller.
- the controller 102 can transmit and receive an input signal from the drive circuit or an output signal to the drive circuit every A / 2 period.
- the controller 102 for example, information on the location information, when it is output at time t 5 from the drive circuit, the information via the transmission path is input to the time t 6 to the controller 102.
- the controller 102 that has received the position information as an input signal calculates a control value of the electromagnetic motor based on the position information.
- the controller the calculated control value, after storage for less than A / 2 period, or, without storing, transmits the control command corresponding to the control value at time t 7.
- a control command via the transmission path is input to the time t 8 to the drive circuit.
- the drive circuit controls the operation of the electromagnetic motor based on the control command.
- the mounting head 26 and the like move to the target position.
- the operation of the electromagnetic motor 76 of the unit elevating device 74 is controlled so that the suction nozzle 62 descends when the electronic component held by the mounting head 26 reaches the point A.
- the mounting head 26 continues to move toward the planned mounting position 114 by the moving device 24.
- the electronic component held by the mounting head 26 avoids the electronic component 110 mounted on the circuit board 112 as indicated by the solid line arrow 116, and follows the gentle curve trajectory. Descent toward 114. Thereby, although it is slight, it becomes possible to shorten mounting
- the arrow 116 used in the above description is a locus of the electronic component when the operation of the mounting head 26 is controlled by a conventional controller.
- the mounting head 26 can be attached to and detached from the slider 50 as described above, and can be shared by the mounting machine 16 and other mounting machines. For this reason, when the mounting head 26 is mounted on a slider of a mounting machine having a conventional controller, the electronic component held by the mounting head 26 moves along the arrow 116 as described above. .
- the operation of the mounting head 26 is controlled by the controller 102.
- the delay time is shortened and the control delay is improved.
- the operation of the mounting head 26 is controlled by the controller 102, if the operation of the mounting head 26 is controlled at the same timing as the conventional controller, the mounting head 26 operates with good response because the delay time is short. Then, the electronic component held by the mounting head 26 may move down and collide with the electronic component 110 mounted on the circuit board 112 as indicated by a dotted arrow 118.
- the electromagnetic motor 76 of the unit elevating device 74 is moved down along the dotted arrow 120. It is necessary to control the operation. However, in order to change the control timing of the unit elevating device 74 of the mounting head 26, it is necessary to adjust the control program, parameters, etc., which is very laborious.
- the operation of the mounting head 26 is controlled so that the delay time is the same as the delay time in the conventional controller.
- information on the location information when it is output at time t 9 from the drive circuit, the information via the transmission path, it is input to the time t 10 to the controller 102.
- the controller 102 that has received the position information as an input signal calculates a control value for the electromagnetic motor 76 of the mounting head 26 based on the position information.
- the controller 102 When the calculation is complete, the controller 102, the calculated control value, after storage A / 2 or more periods, and transmits the control command corresponding to the control value at time t 11.
- a control command via the transmission path is input to the time t 12 to the drive circuit.
- the drive circuit controls the operation of the electromagnetic motor 76 and the like based on the control command.
- the controller 102 calculates the control value according to the input signal acquired before one cycle, not the input signal acquired within one cycle, and the control value
- the delay time is adjusted by storing one cycle or more.
- the delay time in the controller 102 and the delay time in the conventional controller can be made the same, and the electronic component held by the mounting head 26 can be moved to the arrow without changing the control program, parameters, and the like. It is possible to move along 116. In this way, the controller 102 corrects the adverse effects caused by the improvement of the control delay by adjusting the delay time.
- the calculated control value is stored for one cycle or more.
- the calculated control value is shorter than one cycle. Stored for hours or sent without being stored. That is, in the controller 102 that controls the mounting head 26, the time used for the calculation can be made longer than that of a conventional controller or the like. For this reason, it is possible to suppress the calculation capability of the controller 102, which is advantageous in terms of cost.
- the mounting head 26 When the mounting head 26 operates, that is, when the suction nozzle 62 by the unit elevating device 74 or the like moves in the Z-axis direction, there is a risk that electronic components may collide depending on the improvement in control delay.
- the moving device 24 when the moving device 24 is operated, that is, when the mounting head 26 is moved in the X-axis direction and the Y-axis direction, there is no possibility of collision of electronic components or the like depending on the improvement of the control delay. . For this reason, when the operation of the moving device 24 is controlled, the controller 102 controls the operation of the moving device 24 according to the conventional method.
- the controller 102 calculates a control value according to the input signal acquired within one cycle, and stores the calculated control value after storing it for a time shorter than the A / 2 cycle or without storing it.
- a control command corresponding to the value is transmitted to the drive circuit.
- the mounting machine 16 is an example of a manufacturing machine.
- the moving device 24 is an example of a second operating device and a moving device.
- the mounting head 26 is an example of an actuator and a working head.
- the controller 102 is an example of a servo controller.
- the drive circuit 106 corresponding to the moving device 24 is an example of a second drive circuit.
- the drive circuit 106 corresponding to the mounting head 26 is an example of a drive circuit.
- the A / 2 period is an example of a predetermined period.
- the A period is an example of the second period.
- the conventional controller is an example of a second servo controller.
- this invention is not limited to the said Example, It is possible to implement in the various aspect which gave various change and improvement based on the knowledge of those skilled in the art. Specifically, for example, in the above embodiment, the technique of the present invention is applied to the mounting machine 16 for performing the mounting operation. However, the present invention is applied to an apparatus for performing various operations on the circuit board. It is possible to apply the technology of the invention. Specifically, for example, the present invention is applied to an apparatus for applying cream solder or the like on a circuit board, an apparatus for discharging adhesive or the like on the circuit board, an apparatus for performing various processes on the circuit board, etc. It is possible to apply the technology of the invention. In addition, the technology of the present invention can be applied to various working machines used for manufacturing work without being limited to apparatuses that perform work on circuit boards.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Supply And Installment Of Electrical Components (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
図1に、電子部品装着装置10を示す。電子部品装着装置10は、1つのシステムベース12と、そのシステムベース12の上に並んで配設された2つの装着機16とを有している。なお、以下の説明では、装着機16の並ぶ方向をX軸方向と称し、その方向に直角な水平の方向をY軸方向と称し、その方向に直角な鉛直方向をZ軸方向と称する。
装着機16では、上述した構成によって、搬送装置22に保持された回路基板に対して、装着ヘッド26によって装着作業を行うことが可能とされている。具体的には、コントローラ102の指令により、回路基板が作業位置まで搬送され、その位置において、基板保持装置48によって固定的に保持される。また、テープフィーダ86は、コントローラ102の指令により、テープ化部品を送り出し、電子部品を供給位置において供給する。そして、装着ヘッド26が、コントローラ102の指令により、電子部品の供給位置の上方に移動し、吸着ノズル62によって電子部品を吸着保持する。続いて、装着ヘッド26は、コントローラ102の指令により、回路基板の上方に移動する。そして、装着ヘッド26は、ユニット昇降装置74,自転装置78等の作動により、保持している電子部品の上下方向の位置,電子部品の保持姿勢等を調整し、回路基板上の所定の位置に装着する。
装着機16では、上述したように、電子部品の装着作業時において、移動装置24による装着ヘッド26のX軸方向およびY軸方向での位置制御,装着ヘッド26による吸着ノズル62のZ軸方向の位置制御が行われる。この位置制御では、フィードバック制御が用いられており、エンコーダ等から各軸方向の位置に関する情報を取得し、その位置情報に基づいて、電磁モータ等の制御値が演算される。そして、その制御値に応じた制御指令が、駆動回路に送信されることで、対象となる電磁モータが作動し、装着ヘッド26,吸着ノズル62等の位置制御が行われる。
しかしながら、制御遅延の改善、つまり、遅延時間の短縮により、種々の弊害が発生する虞がある。例えば、回路基板上に電子部品が装着される際に、電子部品を保持した装着ヘッド26は、装着予定位置の真上に移動した後に、吸着ノズル62を下降させるのではなく、装着予定位置の真上に移動する前から、吸着ノズル62を下降させている。具体的には、図6に示すように、電子部品110が装着された回路基板112上の装着予定位置114に、電子部品(図示省略)が装着される際に、装着ヘッド26は、まず、移動装置24によって、装着予定位置114に向かって移動する。この際、装着ヘッド26に保持された電子部品は、実線の矢印116に示すように、回路基板112に装着された電子部品110の上端より高い位置を移動する。
Claims (4)
- 製造作業機の作動装置に対応する駆動回路からの入力信号、若しくは、前記駆動回路への出力信号を所定の周期毎に送受信することが可能なサーボコントローラであって、
当該サーボコントローラが、
前記所定の周期より前に受信した入力信号に基づいて出力信号を演算し、その出力信号を、前記所定の周期以上の時間保管した後に、前記駆動回路に送信することを特徴とするサーボコントローラ。 - 前記駆動回路からの入力信号、若しくは、前記駆動回路への出力信号を前記所定の周期より長い第2の周期毎に送受信することが可能な第2サーボコントローラが、前記第2の周期以内に受信した入力信号に基づいて出力信号を演算し、その出力信号を、前記第2の周期より短い時間保管した後、若しくは、保管することなく、前記駆動回路に送信し、
前記駆動回路が当該サーボコントローラへの入力信号を送信したタイミングから、前記駆動回路が当該サーボコントローラからの出力信号を受信したタイミングまでの時間が、前記駆動回路が前記第2サーボコントローラへの入力信号を送信したタイミングから、前記駆動回路が前記第2サーボコントローラからの出力信号を受信したタイミングまでの時間と同じであることを特徴とする請求項1に記載のサーボコントローラ。 - 当該サーボコントローラが、
前記製造作業機の前記作動装置と異なる第2作動装置に対応する第2駆動回路からの入力信号、若しくは、前記第2駆動回路への出力信号を前記所定の周期毎に送受信することが可能であり、前記所定の周期以内に受信した入力信号に基づいて出力信号を演算し、その出力信号を、前記所定の周期より短い時間保管した後、若しくは、保管することなく、前記第2駆動回路に送信することを特徴とする請求項1または請求項2に記載のサーボコントローラ。 - 前記作動装置が、作業ヘッドであり、
前記第2作動装置が、前記作業ヘッドを任意の位置に移動させるための移動装置であることを特徴とする請求項3に記載のサーボコントローラ。
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