WO2025013209A1 - 制御装置、及びコンピュータ読み取り可能な記録媒体 - Google Patents
制御装置、及びコンピュータ読み取り可能な記録媒体 Download PDFInfo
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- WO2025013209A1 WO2025013209A1 PCT/JP2023/025615 JP2023025615W WO2025013209A1 WO 2025013209 A1 WO2025013209 A1 WO 2025013209A1 JP 2023025615 W JP2023025615 W JP 2023025615W WO 2025013209 A1 WO2025013209 A1 WO 2025013209A1
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- acceleration
- interpolation
- command data
- inversion
- reversal
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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—Program-control systems
- G05B19/02—Program-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 program data in numerical form
- G05B19/404—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 program data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
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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
- G05B2219/41084—Compensation speed axis with changing, reversing direction, quadrant circle
Definitions
- This disclosure relates to a control device and a computer-readable recording medium.
- JP 2012-093989 A Japanese Patent Application Publication No. 05-011824
- the industrial machinery control device disclosed herein solves the above problem without delaying commands by detecting reversals of movement commands and determining the reversal state before the acceleration/deceleration processing applied to each axis.
- An aspect of the present disclosure is a control device that includes a program analysis unit that analyzes a control program that commands the operation of an industrial machine and generates a movement command; an interpolation unit that creates first movement command data for each interpolation period related to each axis of the industrial machine based on the movement command; a reversal detection unit that detects the timing at which the movement direction in a predetermined axis is reversed based on the first movement command data calculated by the interpolation unit; an acceleration/deceleration unit that creates second movement command data by performing a predetermined acceleration/deceleration process on the first movement command data calculated by the interpolation unit; and a servo control unit that controls a motor related to each axis of the industrial machine in accordance with the second movement command data, and the servo control unit executes a reversal correction process on the second movement command data in accordance with the timing at which the movement direction in the predetermined axis detected by the reversal detection unit is reversed.
- FIG. 2 is a schematic hardware configuration diagram of a control device according to the first embodiment.
- FIG. 2 is a block diagram showing schematic functions of a control device according to the first embodiment.
- 11 is a graph showing an example of movement command data related to a predetermined axis generated by an interpolation unit.
- 11 is a graph showing an example of movement command data for each interpolation period that has been subjected to acceleration/deceleration processing and that is created by an acceleration/deceleration unit.
- 11 is a graph showing an example in which a servo control unit outputs inversion correction command data.
- based on XX means “based on at least XX,” and includes cases where it is based on other elements in addition to XX. Furthermore, “based on XX” is not limited to cases where XX is used directly, but also includes cases where it is based on XX that has been calculated or processed. "XX” is any element (for example, any information).
- FIG. 1 is a schematic hardware configuration diagram showing the main parts of a control device according to an embodiment of the present invention.
- the control device 1 of the present invention can be implemented as a control device that controls industrial machines such as machine tools and robots that have moving objects that move when driven by a motor.
- the control device 1 that controls a machine tool that processes a workpiece by controlling the relative positions of a tool and a workpiece will be described as an example.
- the CPU 11 provided in the control device 1 of the present invention is a processor that controls the entire control device 1.
- the CPU 11 reads the system program stored in the ROM 12 via the bus 22, and controls the entire control device 1 in accordance with the system program.
- the RAM 13 temporarily stores temporary calculation data, display data, and various data input from outside.
- the non-volatile memory 14 is composed of, for example, a memory backed up by a battery (not shown) or an SSD (Solid State Drive), and retains its memory state even when the power to the control device 1 is turned off.
- the non-volatile memory 14 stores control programs and data read from an external device 72 via the interface 15, data and control programs input via the input device 71, and various data acquired from the industrial machine 3.
- the control programs and data stored in the non-volatile memory 14 may be expanded in the RAM 13 when executed/used.
- various system programs such as well-known analysis programs are written in advance in the ROM 12.
- the interface 15 is an interface for connecting the CPU 11 of the control device 1 to an external device 72 such as a USB memory, a Compact Flash (registered trademark), or an SD card.
- an external device 72 such as a USB memory, a Compact Flash (registered trademark), or an SD card.
- control programs and various data used to control the industrial machine 3 can be read from the external device 72.
- the control programs and various data edited in the control device 1 can be stored in the external device 72.
- the PLC (Programmable Logic Controller) 16 outputs signals to the industrial machine 3 and its peripheral devices (for example, tool changers, actuators such as robots, sensors attached to the industrial machine 3, etc.) via the I/O unit 17 and controls them using a sequence program built into the control device 1.
- the PLC 16 also receives signals from various switches on an operation panel installed on the main body of the industrial machine 3 and from peripheral devices, etc., and passes them to the CPU 11 after performing the necessary signal processing.
- the display device 70 displays various data loaded into the memory, data obtained as a result of executing control programs and system programs, etc., output via the interface 18.
- the input device 71 which is composed of a keyboard, pointing device, etc., passes commands and data based on operations by the operator to the CPU 11 via the interface 19.
- the interface 20 is an interface for connecting the CPU 11 of the control device 1 to a wired or wireless network 5.
- the network 5 may communicate using technologies such as serial communication such as RS-485, Ethernet (registered trademark), optical communication, wireless LAN, Wi-Fi (registered trademark), Bluetooth (registered trademark), etc.
- the network 5 is connected to other industrial machines 4, fog computers 6, cloud servers 7, etc., and exchanges data with the control device 1.
- the axis control circuit 30 for controlling the drive axis of the industrial machine 3 receives a drive axis position command from the CPU 11 and outputs a command for the drive axis to the servo amplifier 40.
- the servo amplifier 40 receives this command and drives the servo motor 50, which is the drive axis, to move each part of the industrial machine 3 along each axis.
- Each servo motor 50 has a built-in position detector, and feeds back a position feedback signal from this position detector to the axis control circuit 30.
- the axis control circuit 30 performs feedback control of the servo motor 50 based on this position feedback signal. Note that in the hardware configuration diagram of FIG.
- axis control circuit 30, servo amplifier 40, and servo motor 50 are shown, but in reality, there are as many as the number of axes of the industrial machine 3 to be controlled.
- three sets of axis control circuits 30, servo amplifiers 40, and servo motors 50 are prepared to relatively move the spindle to which the tool is attached and the workpiece in the directions of the three linear axes (X-axis, Y-axis, and Z-axis).
- the spindle control circuit 60 receives a spindle rotation command and outputs a spindle speed signal to the spindle amplifier 61.
- the spindle amplifier 61 receives this spindle speed signal and rotates the spindle motor 62 of the industrial machine 3 at the commanded rotation speed to drive the spindle.
- a position coder 63 is connected to the spindle motor 62.
- the position coder 63 outputs a feedback pulse in synchronization with the rotation of the spindle, and the feedback pulse is read by the CPU 11.
- FIG. 2 is a schematic block diagram showing the functions of the control device 1 according to the first embodiment of the present disclosure.
- Each function of the control device 1 according to this embodiment is realized by the CPU 11 of the control device 1 shown in FIG. 1 executing a system program and controlling the operation of each part of the control device 1.
- the control device 1 of this embodiment includes a program analysis unit 100, an interpolation unit 110, a reversal detection unit 120, an acceleration/deceleration unit 130, and a servo control unit 140.
- the RAM 13 to the non-volatile memory 14 of the control device 1 store a control program 200 for controlling the industrial machine 3.
- the program analysis unit 100 sequentially reads out blocks of the control program and analyzes the read out blocks. Then, based on the analysis results, it creates a movement command related to a path for moving the drive unit equipped in the industrial machine 3.
- the movement command related to the path created by the program analysis unit 100 takes into account, for example, offsets related to tools.
- the program analysis unit 100 outputs the created movement command to the interpolation unit 110.
- the interpolation unit 110 performs an interpolation process to calculate the movement amount per interpolation period for each axis of the industrial machine 3 based on the movement command created by the program analysis unit 100. Then, it creates movement command data indicating the movement amount per interpolation period for each axis. The interpolation unit 110 outputs the created movement command data per interpolation period to the inversion detection unit 120 and the acceleration/deceleration unit 130.
- the reversal detection unit 120 detects when the direction of movement along each axis of the drive unit of the industrial machine 3 is reversed, based on the movement command data for each interpolation cycle created by the interpolation unit 110.
- the reversal detection unit 120 notifies the servo control unit 140 of the timing when the direction of movement along a specific axis is reversed.
- the acceleration/deceleration unit 130 performs post-interpolation acceleration/deceleration processing to adjust the amount of movement for each interpolation cycle for the movement command data for each interpolation cycle created by the interpolation unit 110.
- the post-interpolation acceleration/deceleration processing performed by the acceleration/deceleration unit 130 suppresses the magnitude of the first-order differential value in the movement of the drive unit along a specified axis based on the movement command data by, for example, applying an average filter to the movement command data for each interpolation cycle.
- the movement command data that has been subjected to post-interpolation acceleration/deceleration processing is accelerated and decelerated over a period of a predetermined post-interpolation acceleration/deceleration time constant.
- the acceleration/deceleration unit 130 outputs the movement command data for each interpolation cycle that has been subjected to acceleration/deceleration processing to the servo control unit 140.
- the servo control unit 140 controls each servo motor 50 so that the driving unit of the industrial machine 3 moves along each axis based on the movement command data for each interpolation period input from the acceleration/deceleration unit 130.
- the servo control unit 140 starts the reversal correction process for the specific axis according to that timing.
- the reversal correction process is a process of outputting the reversal correction command data at the same time as outputting the movement command data to the servo motor 50.
- This reversal correction command data may correct the speed command. It may also correct the torque command.
- the correction amount of the reversal correction command data differs depending on the configuration of the industrial machine 3 and the structure of the members used for the axes, so an appropriate correction amount can be obtained by conducting experiments in advance.
- the effect of the reversal correction has been confirmed by the accuracy of the circular shape, so there is also a method of issuing a circular command for one or several revolutions for two feed axes, applying repetitive control to this, and calculating the reversal correction amount from the control data after the position deviation has converged.
- FIG. 3 is a graph showing an example of movement command data for a predetermined axis created by the interpolation unit 110.
- the movement command data for each interpolation cycle is represented by a white bar in the bar graph.
- the height of the white bar represents the movement amount in that interpolation cycle.
- movement command data is created for each interpolation cycle T itp .
- movement command data is created so as to move by a movement amount L itp for each interpolation cycle T itp .
- movement command data is created so as to move by a movement amount -L itp for each interpolation cycle T itp .
- the reversal detection unit 120 detects that the movement direction in the predetermined axis is reversed at time t n .
- Fig. 4 is a graph showing an example of the movement command data for each interpolation period that has been subjected to acceleration/deceleration processing created by the acceleration/deceleration unit 130.
- the movement command data in Fig. 4 is obtained by performing post-interpolation acceleration/deceleration processing on the movement command data exemplified in Fig. 3.
- the movement command data around time tn is filtered using an average value, so that the speed is decelerated over a period of time equal to the post-interpolation acceleration/deceleration time constant ⁇ , and then the movement direction is reversed.
- the movement amount in the interpolation period becomes 0 at time tp . It is at this time tp that the movement direction related to the actual axis is reversed.
- FIG. 5 is a graph showing an example of the servo control unit 140 outputting the inversion correction command data.
- the inversion correction command data is shown by black bars in the bar graph.
- the servo control unit 140 is notified by the inversion detection unit 120 that the movement direction of a specific axis will be inverted at time t n in the movement command data created by the interpolation unit 110. Then, as a result of the acceleration/deceleration process by the acceleration/deceleration unit 130, the axis actually inverts at time t p .
- the servo control unit 140 estimates the period from time t n to time t p as the inversion correction process start period T icp .
- the inversion correction process start period T icp is ⁇ /2.
- the servo control unit 140 starts the inversion correction process at any time between time t n and the inversion correction process start period T icp .
- the timing to start the inversion correction process it is sufficient to determine in advance by experiment or the like how long before the time t p when the axis actually inverts after the acceleration/deceleration process, the inversion correction process should be started. For example, the timing at which the position deviation at the time of reversal is smallest may be examined in advance by an experiment or the like.
- the timing at which the position deviation is smallest approaches time tp as the acceleration at the time of reversal increases, the timing may be examined under a plurality of conditions with different accelerations at the time of reversal, and the start timing of the reversal correction process may be obtained for each of the different conditions according to the acceleration at the time of reversal.
- the acceleration start timing may be determined so as to be proportional to the acceleration at the time of reversal of the moving direction or the square root of the acceleration at the time of reversal of the moving direction.
- the servo control unit 140 creates reversal correction command data taking into account the movement command data, and superimposes the data on the movement command data as a speed command to control the speed of the servo motor 50. In FIG. 5, the speed command of the reversal correction command data is shown as a correction amount for each interpolation period.
- the control device 1 which is configured as described above, detects reversals of movement commands and determines the reversal state before the acceleration/deceleration processing normally applied to each axis. By taking advantage of the delay caused by this acceleration/deceleration processing, corrections can be made slightly before reversals occur without adding a large buffer for movement commands, thereby reducing position deviations during reversals.
- the servo control unit 140 may increase or decrease the estimated value of the inversion correction process start period T icp according to the acceleration (deceleration) before and after the movement direction of a predetermined axis is reversed.
- the inversion detection unit 120 may notify the servo control unit 140 of the acceleration at the time of inversion and the acceleration after inversion, or the transition of the acceleration for a predetermined time after inversion, when the command speed before and after the inversion of the movement direction is different, if the acceleration/deceleration unit 130 applies an averaging filter to the movement command data for each interpolation command, the period until the movement amount becomes 0 is not simply ⁇ /2.
- the servo control unit 140 estimates the inversion correction process start period T icp to be smaller than ⁇ /2 when the acceleration (deceleration) after the movement direction of a predetermined axis is reversed is larger than the previous acceleration (deceleration), and estimates the inversion correction process start period T icp to be smaller than ⁇ /2 when the acceleration (deceleration) is smaller.
- the inversion correction process start period T icp may be estimated by the following formula 1.
- ⁇ is the post-interpolation acceleration/deceleration time constant
- A is the square root of the value obtained by dividing the acceleration before the reversal by the acceleration after the reversal.
- the acceleration before and after the reversal may be calculated appropriately based on the transition of the movement amount before and after the reversal of the movement command data created by the interpolation unit 110 and the algorithm of the acceleration/deceleration process used by the acceleration/deceleration unit 130. By configuring in this way, it becomes possible to start the inversion correction process at an appropriate timing.
- the servo control unit 140 may observe the progress of the movement command data created by the interpolation unit 110 after the timing at which the direction of movement along a specified axis notified by the reversal detection unit 120 is reversed, and recalculate the reversal timing if the acceleration increases or decreases.
- the time from when the movement amount per interpolation period in the movement command data created by the interpolation unit 110 becomes a specified value until the speed after acceleration/deceleration after interpolation becomes a specified value may be measured at one or more points, and the reversal timing may be calculated based on the measured time.
- the servo control unit 140 may correct the correction amount for each interpolation period of the inversion correction command data when the timing of reversal of the movement direction of a predetermined axis in the movement command data after the acceleration/deceleration process by the acceleration/deceleration unit 130 deviates from the end point of the estimated inversion correction process start period T icp .
- the correction amount for each interpolation period by the inversion correction command data may be reduced, and if the actual inversion timing is earlier, the correction amount for each interpolation period by the inversion correction command data may be increased.
- the integrated value of the correction amount by the inversion correction command data is adjusted so as to match.
- a control device (1) includes a program analysis unit (100) that analyzes a control program (200) that commands the operation of an industrial machine (3) and generates a movement command; an interpolation unit (110) that creates first movement command data for each interpolation period related to each axis of the industrial machine (3) based on the movement command; an inversion detection unit (120) that detects a timing at which a movement direction in a predetermined axis is reversed based on the first movement command data calculated by the interpolation unit (110); an acceleration/deceleration unit (130) that creates second movement command data by performing a predetermined acceleration/deceleration process on the first movement command data calculated by the interpolation unit (110); and a servo control unit (140) that controls a motor related to each axis of the industrial machine in accordance with the second movement command data, and the servo control unit (140) executes an inversion correction
- the servo control unit (140) starts an inversion correction process during an inversion process start period from the timing at which the movement direction in a specified axis detected by the inversion detection unit (120) is reversed to the timing at which the movement direction in the specified axis is reversed in the second movement command data.
- the servo control unit (140) estimates the inversion process start period to be half the time of the post-interpolation acceleration/deceleration time constant set for the axis.
- the servo control unit (140) increases or decreases the estimated value of the reversal processing start period in accordance with the acceleration before and after the reversal.
- the servo control unit (140) estimates the inversion processing start period to be longer than half the post-interpolation acceleration/deceleration time constant when the acceleration after reversal decreases compared to the acceleration before the timing at which the movement direction on a specified axis is reversed, and estimates the inversion processing start period to be shorter than half the post-interpolation acceleration/deceleration time constant when the acceleration after reversal increases.
- the servo control unit (140) estimates the inversion process start period using the following formula 1. where Ticp is the inversion correction process start period, ⁇ is the post-interpolation acceleration/deceleration time constant, and A is the square root of the value obtained by dividing the acceleration before inversion by the acceleration after inversion. (Appendix 7) In a control device (1) according to another aspect of the present disclosure, the servo control unit (140) observes the transition of the first movement command data after the movement direction is reversed, and recalculates the reversal timing based on the transition of the first movement command data.
- the servo control unit (140) measures the time from when the speed before post-interpolation acceleration/deceleration becomes a predetermined value during deceleration until when the speed after post-interpolation acceleration/deceleration becomes a predetermined value at one or more points, and uses the measured time to recalculate the reversal timing.
- the servo control unit (140) starts an inversion correction process a predetermined time prior to the timing at which the movement direction of a specified axis in the second movement command data is reversed.
- a control device (1) according to another aspect of the present disclosure determines the predetermined time period so that the position deviation during reversal is minimized.
- the specified time is determined based on a plurality of conditions in which the acceleration at the time of reversal is different, and is determined so as to be proportional to the acceleration of a specified axis at the time of reversal or the square root of that acceleration.
- a control device (1) according to another aspect of the present disclosure adjusts, when the timing at which the movement direction of a specified axis in the second movement command data is reversed deviates from the estimated end point of the reversal processing start period, to decrease the correction amount for each interpolation period in the reversal correction process if the estimated end point is early, or to increase the correction amount for each interpolation period in the reversal correction process if the estimated end point is late.
- a control device (1) according to another aspect of the present disclosure adjusts the amount of correction for each interpolation cycle so that integrated values of the amounts of correction in the inversion correction process match.
- the servo control unit (140) notifies at least one of the acceleration when the direction of movement of a specified axis is reversed and the change in acceleration over a specified period of time after the reversal.
- a computer-readable recording medium records a program that causes a computer to function as a program analysis unit (100) that analyzes a control program (200) that commands the operation of an industrial machine (3) and generates a movement command; an interpolation unit (110) that creates first movement command data for each interpolation period related to each axis of the industrial machine (3) based on the movement command; an inversion detection unit (120) that detects the timing at which the movement direction in a predetermined axis is reversed based on the first movement command data calculated by the interpolation unit (110); an acceleration/deceleration unit (130) that creates second movement command data by performing a predetermined acceleration/deceleration process on the first movement command data calculated by the interpolation unit (110); and a servo control unit (140) that controls a motor related to each axis of the industrial machine in accordance with the second movement command data, and the servo control unit (140) records a program that causes a computer to function as a program analysis unit (100) that analyzes
- Reference Signs List 1 Control device 3 Industrial machine 4 Industrial machine 5 Network 6 Fog computer 7 Cloud server 11 CPU 12 ROM 13 RAM 14 Non-volatile memory 15, 18, 19, 20 Interface 16 PLC 17 I/O unit 22 Bus 30 Axis control circuit 40 Servo amplifier 50 Servo motor 60 Spindle control circuit 61 Spindle amplifier 62 Spindle motor 63 Position coder 70 Display device 71 Input device 72 External device 100 Program analysis section 110 Interpolation section 120 Reverse rotation detection section 130 Acceleration/deceleration section 140 Servo control section 200 Control program
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Abstract
Description
そこで、余計な指令の遅延などを加えることなく反転補正処理を行う技術が望まれている。
図1は本発明の一実施形態による制御装置の要部を示す概略的なハードウェア構成図である。本発明の制御装置1は、モータが駆動することで移動する移動対象を備えた工作機械やロボットなどの産業機械を制御する制御装置として実装することができる。以下では、工具とワークとの相対位置を制御することでワークを加工する工作機械を制御する制御装置1を例として説明する。
図3は、補間部110が作成する所定の軸に係る移動指令データの例を示すグラフである。図3では、棒グラフの白棒で補間周期毎の移動指令データを示している。白棒の高さはその補間周期における移動量を示している。図3の例では、補間周期Titp毎に移動指令データが作成されている。時刻tn以前は、補間周期Titp毎に移動量Litpだけ移動するように移動指令データが作成されている。また、時刻tn以降は、補間周期Titp毎に移動量-Litpだけ移動するように移動指令データが作成されている。このような移動指令データが作成された場合、反転検出部120は、時刻tnの時点で所定の軸における移動方向が反転することを検出する。
(付記1)
本開示の一態様による制御装置(1)は、産業機械(3)の動作を指令する制御用プログラム(200)を解析し、移動指令を生成するプログラム解析部(100)と、前記移動指令に基づいて前記産業機械(3)が備える各軸に係る補間周期毎の第1の移動指令データを作成する補間部(110)と、前記補間部(110)が算出した第1の移動指令データに基づいて、所定の軸における移動方向が反転するタイミングを検出する反転検出部(120)と、前記補間部(110)が算出した第1の移動指令データに対して所定の加減速処理を行った第2の移動指令データを作成する加減速部(130)と、前記第2の移動指令データに従って前記産業機械の各軸に係るモータを制御するサーボ制御部(140)と、を備え、前記サーボ制御部(140)は、前記反転検出部(120)が検出した所定の軸における移動方向が反転するタイミングに応じて、前記第2の移動指令データに対する反転補正処理を実行する。
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、前記反転検出部(120)が検出した所定の軸における移動方向が反転するタイミングから、前記第2の移動指令データにおいて所定の軸における移動方向が反転するまでの反転処理開始期間において反転補正処理を開始する。
(付記3)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、前記反転処理開始期間を当該軸に設定されている補間後加減速時定数の半分の時間であると推定する。
(付記4)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、所定の軸における移動方向が反転するタイミングの前後で加速度が異なる場合、前記反転処理開始期間の推定値を反転前後の加速度に応じて増減する。
(付記5)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、所定の軸における移動方向が反転するタイミングの前の加速度に対して反転後の加速度が下がる場合には前記反転処理開始期間を補間後加減速時定数の半分の時間よりも長く推定し、反転後の加速度が上がる場合には前記反転処理開始期間を補間後加減速時定数の半分の時間よりも短く推定する。
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、以下の数1式を用いて前記反転処理開始期間を推定する。
(付記7)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、移動方向が反転する後の前記第1の移動指令データの推移を観測し、前記第1の移動指令データの推移に基づいて、反転タイミングを再計算する。
(付記8)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、減速時に補間後加減速前の速度が所定の値になってから、補間後加減速後の速度が所定の値になるまでの時間を1点、もしくは複数点計測し、反転タイミングの再計算に利用する。
(付記9)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、前記第2の移動指令データにおける所定の軸の移動方向が反転するタイミングから予め定めた所定の時間先行して反転補正処理を開始する。
本開示の他の態様による制御装置(1)は、前記所定の時間は、反転時の位置偏差が最も小さくなるように定める。
(付記11)
本開示の他の態様による制御装置(1)は、前記所定の時間は、反転時の加速度が異なる複数の条件により定めたものであり、反転時の所定の軸の加速度又は該加速度の平方根に比例するように定める。
(付記12)
本開示の他の態様による制御装置(1)は、前記第2の移動指令データにおける所定の軸の移動方向が反転するタイミングが、推定した前記反転処理開始期間の終了時点とずれた場合、推定した終了時点が早かった場合には前記反転補正処理における補間周期毎の補正量を下げ、遅かった場合には前記反転補正処理における補間周期毎の補正量を上げる調整を行う。
(付記13)
本開示の他の態様による制御装置(1)は、前記補正量の調整は、前記反転補正処理における補正量の積算値が一致するように、補間周期毎の補正量の大きさを調節する。
(付記14)
本開示の他の態様による制御装置(1)は、前記サーボ制御部(140)は、所定の軸の移動方向が反転した時の加速度及び反転後の所定時間の加速度の推移の少なくともいずれかを通知する。
本開示の一態様によるコンピュータ読み取り可能な記録媒体は、産業機械(3)の動作を指令する制御用プログラム(200)を解析し、移動指令を生成するプログラム解析部(100)、前記移動指令に基づいて前記産業機械(3)が備える各軸に係る補間周期毎の第1の移動指令データを作成する補間部(110)、前記補間部(110)が算出した第1の移動指令データに基づいて、所定の軸における移動方向が反転するタイミングを検出する反転検出部(120)、前記補間部(110)が算出した第1の移動指令データに対して所定の加減速処理を行った第2の移動指令データを作成する加減速部(130)、前記第2の移動指令データに従って前記産業機械の各軸に係るモータを制御するサーボ制御部(140)、としてコンピュータを機能させ、前記サーボ制御部(140)は、前記反転検出部(120)が検出した所定の軸における移動方向が反転するタイミングに応じて、前記第2の移動指令データに対する反転補正処理を実行する、プログラムを記録する。
3 産業機械
4 産業機械
5 ネットワーク
6 フォグコンピュータ
7 クラウドサーバ
11 CPU
12 ROM
13 RAM
14 不揮発性メモリ
15,18,19,20 インタフェース
16 PLC
17 I/Oユニット
22 バス
30 軸制御回路
40 サーボアンプ
50 サーボモータ
60 スピンドル制御回路
61 スピンドルアンプ
62 スピンドルモータ
63 ポジションコーダ
70 表示装置
71 入力装置
72 外部機器
100 プログラム解析部
110 補間部
120 反転検出部
130 加減速部
140 サーボ制御部
200 制御用プログラム
Claims (15)
- 産業機械の動作を指令する制御用プログラムを解析し、移動指令を生成するプログラム解析部と、
前記移動指令に基づいて前記産業機械が備える各軸に係る補間周期毎の第1の移動指令データを作成する補間部と、
前記補間部が算出した第1の移動指令データに基づいて、所定の軸における移動方向が反転するタイミングを検出する反転検出部と、
前記補間部が算出した第1の移動指令データに対して所定の加減速処理を行った第2の移動指令データを作成する加減速部と、
前記第2の移動指令データに従って前記産業機械の各軸に係るモータを制御するサーボ制御部と、
を備え、
前記サーボ制御部は、前記反転検出部が検出した所定の軸における移動方向が反転するタイミングに応じて、前記第2の移動指令データに対する反転補正処理を実行する、
制御装置。 - 前記サーボ制御部は、前記反転検出部が検出した所定の軸における移動方向が反転するタイミングから、前記第2の移動指令データにおいて所定の軸における移動方向が反転するまでの反転処理開始期間において反転補正処理を開始する、
請求項1に記載の制御装置。 - 前記サーボ制御部は、前記反転処理開始期間を当該軸に設定されている補間後加減速時定数の半分の時間であると推定する、
請求項2に記載の制御装置。 - 前記サーボ制御部は、所定の軸における移動方向が反転するタイミングの前後で加速度が異なる場合、前記反転処理開始期間の推定値を反転前後の加速度に応じて増減する、
請求項2に記載の制御装置。 - 前記サーボ制御部は、所定の軸における移動方向が反転するタイミングの前の加速度に対して反転後の加速度が下がる場合には前記反転処理開始期間を補間後加減速時定数の半分の時間よりも長く推定し、反転後の加速度が上がる場合には前記反転処理開始期間を補間後加減速時定数の半分の時間よりも短く推定する、
請求項4に記載の制御装置。 - 前記サーボ制御部は、移動方向が反転する後の前記第1の移動指令データの推移を観測し、前記第1の移動指令データの推移に基づいて、反転タイミングを再計算する、
請求項3~6のいずれか1つに記載の制御装置。 - 前記サーボ制御部は、減速時に補間後加減速前の速度が所定の値になってから、補間後加減速後の速度が所定の値になるまでの時間を1点、もしくは複数点計測し、反転タイミングの再計算に利用する、
請求項7に記載の制御装置。 - 前記サーボ制御部は、前記第2の移動指令データにおける所定の軸の移動方向が反転するタイミングから予め定めた所定の時間先行して反転補正処理を開始する、
請求項1に記載の制御装置。 - 前記所定の時間は、反転時の位置偏差が最も小さくなるように定める、
請求項9に記載の制御装置。 - 前記所定の時間は、反転時の加速度が異なる複数の条件により定めたものであり、反転時の所定の軸の加速度又は該加速度の平方根に比例するように定める、
請求項9に記載の制御装置。 - 前記第2の移動指令データにおける所定の軸の移動方向が反転するタイミングが、推定した前記反転処理開始期間の終了時点とずれた場合、推定した終了時点が早かった場合には前記反転補正処理における補間周期毎の補正量を下げ、遅かった場合には前記反転補正処理における補間周期毎の補正量を上げる調整を行う、
請求項3~6のいずれか1つに記載の制御装置。 - 前記補正量の調整は、前記反転補正処理における補正量の積算値が一致するように、補間周期毎の補正量の大きさを調節する、
請求項12に記載の制御装置。 - 前記サーボ制御部は、所定の軸の移動方向が反転した時の加速度及び反転後の所定時間の加速度の推移の少なくともいずれかを通知する、
請求項1に記載の制御装置。 - 産業機械の動作を指令する制御用プログラムを解析し、移動指令を生成するプログラム解析部、
前記移動指令に基づいて前記産業機械が備える各軸に係る補間周期毎の第1の移動指令データを作成する補間部、
前記補間部が算出した第1の移動指令データに基づいて、所定の軸における移動方向が反転するタイミングを検出する反転検出部、
前記補間部が算出した第1の移動指令データに対して所定の加減速処理を行った第2の移動指令データを作成する加減速部、
前記第2の移動指令データに従って前記産業機械の各軸に係るモータを制御するサーボ制御部、
としてコンピュータを機能させ、
前記サーボ制御部は、前記反転検出部が検出した所定の軸における移動方向が反転するタイミングに応じて、前記第2の移動指令データに対する反転補正処理を実行する、
プログラムを記録したコンピュータ読み取り可能な記録媒体。
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| CN202380100042.XA CN121444027A (zh) | 2023-07-11 | 2023-07-11 | 控制装置以及计算机可读取的记录介质 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6361306A (ja) * | 1986-09-01 | 1988-03-17 | Mitsubishi Electric Corp | 数値制御装置 |
| JPH01222302A (ja) * | 1988-03-01 | 1989-09-05 | Yoshiaki Kakino | 数値制御装置 |
| JPH0511824A (ja) * | 1991-07-04 | 1993-01-22 | Fanuc Ltd | バツクラツシ加速制御方式 |
| JP2002366230A (ja) * | 2001-06-06 | 2002-12-20 | Okuma Corp | ねじ送り装置におけるバックラッシュ補正装置 |
| JP2006195664A (ja) * | 2005-01-12 | 2006-07-27 | Okuma Corp | 数値制御装置 |
| JP2012093989A (ja) * | 2010-10-27 | 2012-05-17 | Makino Milling Mach Co Ltd | 送り軸反転時の補正方法 |
| WO2022009822A1 (ja) * | 2020-07-10 | 2022-01-13 | ファナック株式会社 | 工作機械の制御装置と制御方法及びスレーブ軸制御装置 |
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- 2023-07-11 CN CN202380100042.XA patent/CN121444027A/zh active Pending
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6361306A (ja) * | 1986-09-01 | 1988-03-17 | Mitsubishi Electric Corp | 数値制御装置 |
| JPH01222302A (ja) * | 1988-03-01 | 1989-09-05 | Yoshiaki Kakino | 数値制御装置 |
| JPH0511824A (ja) * | 1991-07-04 | 1993-01-22 | Fanuc Ltd | バツクラツシ加速制御方式 |
| JP2002366230A (ja) * | 2001-06-06 | 2002-12-20 | Okuma Corp | ねじ送り装置におけるバックラッシュ補正装置 |
| JP2006195664A (ja) * | 2005-01-12 | 2006-07-27 | Okuma Corp | 数値制御装置 |
| JP2012093989A (ja) * | 2010-10-27 | 2012-05-17 | Makino Milling Mach Co Ltd | 送り軸反転時の補正方法 |
| WO2022009822A1 (ja) * | 2020-07-10 | 2022-01-13 | ファナック株式会社 | 工作機械の制御装置と制御方法及びスレーブ軸制御装置 |
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