WO2022202656A1 - 数値制御装置及び数値制御プログラム - Google Patents
数値制御装置及び数値制御プログラム Download PDFInfo
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- WO2022202656A1 WO2022202656A1 PCT/JP2022/012571 JP2022012571W WO2022202656A1 WO 2022202656 A1 WO2022202656 A1 WO 2022202656A1 JP 2022012571 W JP2022012571 W JP 2022012571W WO 2022202656 A1 WO2022202656 A1 WO 2022202656A1
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- 238000003754 machining Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims description 14
- 230000001133 acceleration Effects 0.000 abstract description 32
- 238000007781 pre-processing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000003936 working memory Effects 0.000 description 1
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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
- 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
-
- 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
- G05B2219/33—Director till display
- G05B2219/33099—Computer numerical control [CNC]; Software control [SWC]
-
- 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
- G05B2219/43—Speed, acceleration, deceleration control ADC
- G05B2219/43006—Acceleration, deceleration control
Definitions
- the present invention relates to a numerical control device and a numerical control program.
- the numerical control device controls the processing device according to a processing program that is expressed by a plurality of designated coordinates, movement speed, etc. that the object should pass along the movement path of the object such as a work or tool.
- the numerical controller analyzes the machining program, performs interpolation processing for calculating the speed or position that should be at each time for each drive axis of the machining apparatus, and drives each drive axis based on the interpolated information.
- each block that designates the operation between two consecutive designated coordinates in the machining program is first accelerated from zero and finally decelerated to zero. Acceleration/deceleration processing may be performed to correct the movement speed. Normally, in the acceleration/deceleration process, the velocity is set to zero at the start point of the block, and the velocity is increased at a constant acceleration, and at the end point of the block, the velocity is decreased at a constant acceleration before the end point so that the velocity becomes zero. In this case, immediately after the start of each block, each speed is the sum of the speed data for increasing the speed from zero to the speed of the block and the speed data for decelerating and stopping at the end point of the previous block. It will drive the drive shaft.
- the acceleration/deceleration time constant is made small at the start of a block, the speed data for acceleration immediately after the start of this block and the speed for deceleration and stop at the end point of the previous block are added together. It may require excessive accelerations that produce velocities or vibrations that exceed the capabilities of the axis. Therefore, a technique is desired that does not require excessive speed and acceleration while suppressing errors in the movement path.
- a numerical controller is a numerical controller that controls a machining apparatus having a plurality of drive axes that drive an object according to a machining program that includes a plurality of command blocks each specifying a specified speed of the object. wherein, among the plurality of command blocks, for at least a curve block specifying curve movement, the specified speed is first accelerated from zero with the precorrection time constant and finally decelerated to zero with the precorrection time constant. and a pre-correction speed calculation unit for calculating the pre-correction speed of each drive shaft for each time to achieve the composite speed.
- a numerical control program is a numerical control for controlling a machining apparatus having a plurality of drive axes for driving an object according to a machining program including a plurality of command blocks each specifying a specified speed of the object.
- the specified velocity is first accelerated from zero with a precorrection time constant and finally to zero with the precorrection time constant.
- a combined speed calculation control section for calculating a combined speed corrected to decelerate, and a pre-corrected speed calculation control section for calculating a pre-corrected speed for each time of each drive shaft that realizes the combined speed.
- FIG. 1 is a block diagram showing the configuration of a numerical controller according to an embodiment of the present disclosure
- FIG. It is a figure which shows an example of the movement path
- 3 is a diagram showing various velocities calculated by the numerical control device of FIG. 1 to realize the moving route of FIG. 2
- FIG. FIG. 3 is a diagram showing the movement path of FIG. 2 , the movement path when pre-correction speeds are calculated for curve blocks, and the movement path when post-correction speeds are calculated for curve blocks
- 7 is a graph showing temporal changes in moving speed when following a machining program, when calculating a pre-correction speed, and when calculating a post-correction speed.
- FIG. 1 is a block diagram showing the configuration of a numerical control device 1 according to an embodiment of the present disclosure.
- the numerical control device 10 controls a machining device having a plurality of drive axes for driving objects (for example, tools, workpieces, etc.) according to a machining program including a plurality of command blocks each specifying a specified speed of the object (eg, tool, work, etc.).
- the numerical controller 1 inputs command values to a drive circuit (servo drive) 20 that drives a plurality of drive axes of the machining apparatus.
- the command block generally specifies the movement path of the object by specifying the coordinates of the start and end points of the movement path and the movement speed.
- the numerical control device 10 can be realized, for example, by causing a computer device having a CPU, a memory, an input/output interface, etc. to execute a numerical control program according to the present disclosure.
- the numerical controller 10 includes a program reading unit 11, a preprocessing unit 12, a block determination unit 13, a reference speed calculation unit 14, a post-correction speed calculation unit 15, a composite speed calculation unit 16, a pre-correction speed calculation unit 17, and an output speed calculation unit. It has a part 18 . These components are categorized functions of the numerical control device 10, and may not be clearly distinguished in terms of physical structure and program structure.
- the program reading unit 11 reads the machining program stored in the storage medium into the working memory for each command block.
- the program reading unit 11 may read in advance instruction blocks to be executed later within the range allowed by the capacity of the storage area.
- the preprocessing unit 12 changes the contents of the command block so that the speed changes at an acceleration within the allowable range. fix it.
- the block discriminating unit 13 discriminates whether the command block is a straight line block that specifies linear movement of the target or a curved block that specifies curved movement of the target.
- the reference speed calculation unit 14 calculates a reference speed, which is the ideal value of the speed for each time of each drive axis that realizes the specified speed, for the linear block.
- the reference speed calculator 14 calculates the ideal value of the speed of each drive axis for each time between the start point and the end point of the target movement path specified by the command block (the speed that reproduces the movement faithful to the command block). ) is calculated. For this reason, the reference speed calculator 14 performs a calculation to interpolate the speed command value between the start point and the end point of the command block.
- the post-correction speed calculation unit 15 corrects the reference speed calculated by the reference speed calculation unit 14 so that it is first accelerated from zero with the post-correction time constant and finally decelerates to zero with the post-correction time constant, thereby calculating the post-correction speed. calculate. Therefore, the post-correction speed has, in this order, an acceleration section in which the speed gradually increases, a constant speed section in which the speed is constant, and a deceleration section in which the speed gradually decreases.
- the post-correction time constant is set in advance according to the characteristics of the processing apparatus.
- the post-correction speed calculator 15 preferably determines the post-correction speed to be accelerated from the start time of the reference speed and decelerated from the end time of the reference speed. In other words, the post-correction speed calculation unit 15 sets the speed of the drive shaft at the reference speed start point time to zero, and corrects the change in the reference speed over time so that the drive shaft starts accelerating from the reference speed start point time. It is preferred to determine the initial time variation of the post-correction speed in that command block. The post-correction speed calculator 15 sets the speed calculated by the reference speed calculator 14 as the speed of the drive shaft at the start time of the reference speed, and adjusts the speed of the drive shaft so that deceleration of the drive shaft starts from the start time of the reference speed.
- a post-correction speed can be calculated, for example, by calculating the post-correction speed at a given time as an average value of the reference speeds from the time before the given time by the post-correction time constant to the given time.
- the composite speed calculation unit 16 calculates a corrected composite speed for the curve block by first accelerating the designated speed from zero with the pre-correction time constant and finally decelerating to zero with the pre-correction time constant. In other words, before calculating the speed of the drive shaft at each time, the composite speed calculation unit 16 corrects the moving speed of the target that is the basis for calculating the speed of the drive shaft at each time. This combined speed calculator 16 accelerates and decelerates on the moving path specified by the curve block. That is, the synthetic speed calculator 16 calculates the acceleration and deceleration of the designated speed as changes in angular velocity.
- the combined speed calculation unit 16 may set different values for the pre-correction time constant of the acceleration section and the pre-correction time constant of the deceleration section, and sets the value of the pre-correction time constant to a different value for each command block. good too.
- the combined speed calculator 16 preferably makes the pre-correction time constant equal to the post-correction time constant applied to the immediately preceding command block.
- the deceleration of the initial moving speed of the curve block by the composite speed calculator 16 is offset by the deceleration portion added to the end of the speed change of the immediately preceding straight block by the post-correction speed calculator 15 .
- the pre-correction time constant of the deceleration section of the previous curve block and the subsequent curve block may be zero.
- the pre-correction speed calculation unit 17 calculates a pre-correction speed that is the speed of each drive shaft for each time that realizes the composite speed calculated by the composite speed calculation unit 16 . In this way, by interpolating the speed change between the start point and the end point based on the synthesized speed obtained by correcting the speed change based on the command block so as not to cause excessive speed change near the start point and the end point, the command It is possible to reduce the deviation of the actual movement path of the object from the movement path specified by the block.
- the output speed calculation unit 18 calculates the output speed by adding the post-correction speed calculated by the post-correction speed calculation unit 15 and the pre-correction speed calculated by the pre-correction speed calculation unit 17 .
- the output speed calculation unit 18 connects the post-correction speed or the pre-correction speed of each command block so that the end point time of the previous command block and the start point time of the next command block are superimposed, so that each drive Calculates the output velocity, which specifies the change in axis velocity over time.
- a command value can be input to the drive circuit 20 to relatively accurately move the object along a complicated movement path specified by a plurality of command blocks without requiring excessive speed and acceleration.
- the numerical control program according to the present disclosure for realizing the numerical control device 10 includes a program reading control unit that realizes the program reading unit 11 and a preprocessing control unit that realizes the preprocessing unit 12. a block determination control unit that implements the block determination unit 13; a reference speed calculation control unit that implements the reference speed calculation unit 14; a post-correction speed calculation control unit that implements the post-correction speed calculation unit 15; A combined speed calculation control unit that implements the calculation unit 16, a pre-correction speed calculation control unit that implements the pre-correction speed calculation unit 17, and an output speed calculation control unit that implements the output speed calculation unit 18 are provided.
- a numerical control program according to the present disclosure may be provided in a state stored in a storage medium that non-temporarily stores the program.
- the processing apparatus has an X-direction drive axis for moving the object in the X-direction and a Y-direction drive axis for moving the object in the Y-direction, and moves the object on the XY plane.
- FIG. 3 shows, for the first linear block N1, the curved block N2 and the second linear block N3 of FIG. Indicates output speed. Markers in the figure indicate points at which velocity values are specified.
- the designated speed (absolute value of the moving speed) in the first linear block N1, the curved block N2, and the second linear block N3 does not change, but only the direction changes.
- the first linear block N1 designates uniform movement in the X direction
- the curve block N2 designates uniform movement in an arc with a central angle of 90°
- the second linear block N3 designates uniform movement in the Y direction. Specifies constant velocity movement of .
- the reference velocity calculator 14 decomposes the velocity of the first linear block N1 and the velocity of the second linear block N3 into an X-direction component and a Y-direction component, respectively, and calculates the X-direction component and the Y-direction component for each time. Calculate (interpolate) the value of As a result, an X-axis reference speed, which is continuous data of the speed of the X-direction drive axis at each time, and a Y-axis reference speed, which is continuous data of the speed of the Y-direction drive axis at each time, are obtained.
- the first linear block N1 is represented by an X-axis reference velocity having a constant value and a Y-axis reference velocity having no value (velocity is always zero).
- the second linear block N3 is represented by the X-axis reference velocity having no value and the Y-axis reference velocity having a constant value.
- the post-correction speed calculation unit 15 calculates the X-axis post-correction speed and the Y-axis post-correction speed by correcting the X-axis reference speed and the Y-axis reference speed to accelerate and decelerate with a predetermined post-correction time constant.
- the X-axis post-correction speed and the Y-axis post-correction speed accelerate from the starting point time of the X-axis reference speed and Y-axis reference speed, and decelerate from the end point time of the X-axis reference speed and Y-axis reference speed.
- the first linear block N1 is represented by the X-axis post-correction speed that changes in trapezoidal shape and the Y-axis post-correction speed that has no value.
- the second linear block N3 is represented by an X-axis post-correction speed having no value and a Y-axis post-correction speed with a trapezoidal speed change.
- the synthetic speed calculation unit 16 corrects the specified speed of the curve block N2, first accelerates from zero with the pre-correction time constant, and finally calculates the synthetic speed that decelerates to zero with the pre-correction time constant.
- the curve block N2 is represented by a synthetic speed whose absolute value changes in a trapezoidal shape.
- the pre-correction time constant of curve block N2 is set equal to the post-correction time constant applied to the immediately preceding first linear block N1.
- the pre-corrected speed calculation unit 17 calculates the pre-corrected X-axis speed and the pre-corrected Y-axis speed, which are the speeds of the X-direction drive shaft and the Y-direction drive shaft at each time that can realize the combined speed. Assuming that the angle from the starting position of the target position at that time is ⁇ when viewed from the center of the path of the curve block N2, the X-axis pre-correction speed is the product of the composite speed and sin ⁇ , and the Y-axis pre-correction speed is the composite velocity multiplied by cos ⁇ .
- the X-axis output speed which is the operation command value for the X-direction drive axis
- the Y-axis post-correction speed of the first linear block N1, the Y-axis pre-correction speed of the curve block N2, and the Y-axis of the second linear block N3 are calculated.
- the Y-axis output speed which is the operation command value for the Y-direction drive axis, is calculated by adding the post-correction speed and the post-correction speed.
- the deceleration section of the X-axis post-correction speed of the first linear block N1 and the acceleration section of the X-axis pre-correction speed of the curve block N2 temporally overlap, in this time range, the X-axis post-correction speed of the first linear block N1
- the X-axis output speed is the sum of the corrected speed and the X-axis pre-corrected speed of the curve block N2.
- the deceleration section of the X-axis pre-correction speed of the curve block N2 and the acceleration section of the X-axis post-correction speed of the second linear block N3 are also added.
- the X-axis output speed changes continuously without including excessive speed or acceleration, Errors in the movement path of the object are also suppressed.
- the deceleration section and acceleration section of the Y-axis post-correction speed and Y-axis pre-correction speed are added together, and the output speed is continuous without including an excessively large speed or acceleration. , and the error in the moving route of the object is also suppressed.
- FIG. 4 shows the target movement path specified in the machining program of FIG. and a path following the operation command value when the post-correction speed is calculated by the reference speed calculator 14 and the post-correction speed calculator 15 for the curve block N2.
- FIG. 5 shows the change over time of the moving speed of the object corresponding to FIG.
- the movement path (solid line) when the pre-correction speed is calculated and the movement path (two-dot chain line) when the post-correction speed is calculated are Y Axial acceleration begins and Y-axis acceleration is completed at points C1 and C2, respectively.
- the acceleration distance L1 when the pre-correction speed is calculated is shorter than the acceleration distance L2 when the post-correction speed is calculated. Therefore, the velocity gradient when the pre-correction velocity is calculated is larger than the velocity gradient when the post-correction velocity is calculated.
- the numerical controller 10 calculates a combined speed obtained by providing an acceleration section and a deceleration section to the specified speed of the curve block, and then calculates the pre-correction speed, which is the speed of each axis at each time. , while suppressing errors in the movement path, do not require excessive speed and acceleration.
- the numerical control device and the numerical control program according to the present disclosure have been described above, the numerical control device and the numerical control program according to the present disclosure are not limited to the above-described embodiments. Further, the effects described in the above-described embodiments are merely enumerations of the most suitable effects produced by the numerical control device and the numerical control program according to the present disclosure, and the effects of the numerical control device and the numerical control program according to the present disclosure are not limited to those described in the above embodiments.
- the curve block is not limited to specifying a circular arc. It may be something to do.
- the numerical control device and the numerical control program according to the present disclosure are configured to calculate a pre-correction speed by processing straight-line blocks with the combined speed calculation unit and the pre-correction speed calculation unit without distinguishing between curve blocks and straight-line blocks.
- REFERENCE SIGNS LIST 10 numerical controller 11 program reading unit 12 preprocessing unit 13 block determination unit 14 reference speed calculation unit 15 post-correction speed calculation unit 16 combined speed calculation unit 17 pre-correction speed calculation unit 18 output speed calculation unit 20 drive circuit
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Abstract
Description
11 プログラム読込部
12 前処理部
13 ブロック判別部
14 基準速度算出部
15 後修正速度算出部
16 合成速度算出部
17 前修正速度算出部
18 出力速度算出部
20 駆動回路
Claims (5)
- 対象の指定速度をそれぞれ特定する複数の指令ブロックを含む加工プログラムに従って、前記対象を駆動する複数の駆動軸を有する加工装置を制御する数値制御装置であって、
前記複数の指令ブロックのうち、少なくとも曲線移動を指定する曲線ブロックについて、前記指定速度を、最初にゼロから前修正時定数で加速し、最後にゼロまで前記前修正時定数で減速するよう修正した合成速度を算出する合成速度算出部と、
前記合成速度を実現する各駆動軸の時間毎の前修正速度を算出する前修正速度算出部と、
を備える、数値制御装置。 - 前記指令ブロックが前記曲線ブロックであるか直線移動を指定する直線ブロックであるかを判別するブロック判別部と、
前記直線ブロックについて、前記指定速度を実現する各駆動軸の時間毎の基準速度を算出する基準速度算出部と、
前記基準速度を、最初にゼロから後修正時定数で加速し、最後にゼロまで前記後修正時定数で減速するよう修正した後修正速度を算出する後修正速度算出部と、
前記前修正速度と前記後修正速度とを加算した出力速度を算出する出力速度算出部と、
をさらに備える、請求項1に記載の数値制御装置。 - 合成速度算出部は、前記合成速度を、前記曲線ブロックの始点時刻から加速するとともに、前記曲線ブロックの終点時刻から減速するよう定め、
前記後修正速度算出部は、前記後修正速度を、前記基準速度の始点時刻から加速するとともに、前記基準速度の終点時刻から減速するよう定める、請求項2に記載の数値制御装置。 - 前記合成速度算出部は、直前の前記指令ブロックが前記直線ブロックである場合には、前記前修正時定数を直前の前記直線ブロックに適用される前記後修正時定数と等しくする、請求項2又は3に記載の数値制御装置。
- 対象の指定速度をそれぞれ特定する複数の指令ブロックを含む加工プログラムに従って、前記対象を駆動する複数の駆動軸を有する加工装置を制御するための数値制御プログラムであって、
前記複数の指令ブロックのうち、少なくとも曲線移動を指定する曲線ブロックについて、前記指定速度を、最初にゼロから前修正時定数で加速し、最後にゼロまで前記前修正時定数で減速するよう修正した合成速度を算出する合成速度算出制御部と、
前記合成速度を実現する各駆動軸の時間毎の前修正速度を算出する前修正速度算出制御部と、
を備える、数値制御プログラム。
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US18/261,209 US20240077845A1 (en) | 2021-03-24 | 2022-03-18 | Numerical controller and numerical control program |
DE112022000420.7T DE112022000420T5 (de) | 2021-03-24 | 2022-03-18 | Numerische Steuereinrichtung und ein numerisches Steuerprogramm |
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Citations (5)
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JPH0199103A (ja) * | 1987-10-13 | 1989-04-18 | Yamatake Honeywell Co Ltd | ロボット制御装置 |
JPH03292508A (ja) * | 1990-04-11 | 1991-12-24 | Brother Ind Ltd | サーボ制御装置 |
JPH06110534A (ja) * | 1992-09-29 | 1994-04-22 | Intetsuku:Kk | 工作機械における位置制御方法 |
JPH06187026A (ja) * | 1992-12-19 | 1994-07-08 | Toyoda Mach Works Ltd | 軌跡制御装置 |
JP2020019125A (ja) * | 2018-08-03 | 2020-02-06 | パナソニックIpマネジメント株式会社 | ロボット制御方法 |
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- 2022-03-18 CN CN202280013877.7A patent/CN116917822A/zh active Pending
- 2022-03-18 WO PCT/JP2022/012571 patent/WO2022202656A1/ja active Application Filing
- 2022-03-18 JP JP2023509122A patent/JPWO2022202656A1/ja active Pending
- 2022-03-18 US US18/261,209 patent/US20240077845A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0199103A (ja) * | 1987-10-13 | 1989-04-18 | Yamatake Honeywell Co Ltd | ロボット制御装置 |
JPH03292508A (ja) * | 1990-04-11 | 1991-12-24 | Brother Ind Ltd | サーボ制御装置 |
JPH06110534A (ja) * | 1992-09-29 | 1994-04-22 | Intetsuku:Kk | 工作機械における位置制御方法 |
JPH06187026A (ja) * | 1992-12-19 | 1994-07-08 | Toyoda Mach Works Ltd | 軌跡制御装置 |
JP2020019125A (ja) * | 2018-08-03 | 2020-02-06 | パナソニックIpマネジメント株式会社 | ロボット制御方法 |
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