JP5089463B2 - Driving characteristic adjustment method for scanner driver of galvano scanner - Google Patents

Description

  The present invention relates to a driving characteristic adjustment method for a scanner driver of a galvano scanner. More specifically, the adjustment operation for optimizing the driver operation characteristics of the scanner driver is easily performed according to various drive forms of the galvano scanner (drive forms having different loads, drive patterns, response characteristics, etc.). The present invention relates to a method for adjusting the drive characteristics of a scanner driver of a galvano-type scanner capable of performing the same.

  In the galvano scanner system, the driver circuit constant of the scanner driver, which is an analog driver, is adjusted using a variable resistor, etc., according to various drive modes (drive modes with different loads, drive patterns, response characteristics, etc.). Therefore, the operating characteristics are optimized.

  For example, a galvano scanner system for optical scanning has a galvano scanner for rotating a mirror for optical scanning within a predetermined angle range and a dedicated scanner driver for driving the galvano scanner. A real-time drive command is given to the scanner driver from a function generator or an external command generator consisting of a personal computer and a DA converter, and the galvano scanner is driven with a predetermined drive control specification. ing.

  The scanner driver is provided with a plurality of variable resistors and the like for adjusting the operating characteristics. When adjusting the operating characteristics, connect a regulator to the galvano scanner, and adjust each variable resistor etc. with the regulator to optimize the driver circuit constants so that the operating characteristics best suited to the drive mode can be obtained. I am trying.

  For example, the optimum operating characteristics of the scanner driver differ between when the galvano scanner is moved over a wide range at high speed (coarse movement) and when it is finely moved with high positioning accuracy (fine movement). In order to drive a galvano scanner from a certain position A to a target position B, it is necessary to change the applied command voltage from a command voltage a corresponding to position A to a command voltage b corresponding to position B. The change from the command voltage a to b output from the external command generator is a command representing only the final target position B for the scanner driver. Therefore, the path from the position A to the position B and the arrival time are set by adjusting the circuit constants of the analog scanner driver. For example, in the case of a driving pattern in which the amount of change from the command voltage a to the command voltage b is large, the operation characteristics are adjusted by adjusting the circuit constants of the scanner driver so that the galvano scanner can be driven without increasing the overshoot amount. It is necessary to optimize the system.

Patent Document 1 discloses an analog input / output galvano scanner system. In this document, the galvano scanner is optimally driven by storing and holding various drive patterns in the scanner driver. Patent Document 2 discloses an electromagnetic finite rotation type motor with a detector that can be used as a galvano scanner for mirror scanning.
JP 2005-338450 A JP 07-31119 A

  As described above, in the galvano scanner system, the driver circuit constants are adjusted by operating a plurality of variable resistors and the like in order to optimize the operating characteristics of the scanner driver for various drive modes.

  However, in order to optimize the operating characteristics of the scanner driver, it is necessary to adjust a number of parameters. For example, in order to adjust the control gain, damping characteristic, integration constant, filter characteristic (resonance characteristic), robustness, etc. of the scanner driver, it is necessary to operate a large number of variable resistors, variable capacitors, and the like. Therefore, the adjustment work is not easy and takes time.

  Further, in such an adjustment method, the adjustment state of the scanner driver is fixed, and therefore, if the drive mode of the galvano scanner is changed after adjustment, the optimum operation state cannot be realized. In this case, it is necessary to connect the setting device to the scanner driver again and change the variable resistance value and the like to perform adjustment work for optimizing the driver operating characteristics (circuit constants). Such adjustment work takes time and is difficult to perform on the user side.

  In view of these points, an object of the present invention is to make it possible to easily and quickly optimize the operating characteristics of a scanner driver when the driving mode of a galvano scanner is set or changed. Another object of the present invention is to propose a method for adjusting the drive characteristics of the scanner driver of the galvano scanner.

In order to solve the above-described problem, a driving characteristic adjustment method for a scanner driver of a galvano scanner according to the present invention includes:
In accordance with each of a plurality of driving modes of the galvano scanner, obtain optimization data composed of a combination of optimum values of each circuit constant of the scanner driver that drives the galvano scanner,
Each of the optimization data is stored and held in a form corresponding to the drive form in the scanner side storage part on the galvano scanner side or the driver side storage part on the scanner driver side,
By supplying an external signal designating one of the drive modes to the scanner driver, the optimization data associated with the designated drive mode is sent to the scanner-side storage unit or the driver Output from the side storage unit,
In the scanner driver, each circuit constant of the scanner driver is set according to the outputted optimization data, or each set circuit constant is changed.

  Here, the plurality of driving modes include at least driving modes having different loads, driving patterns, and response characteristics.

Next, the galvano scanner system of the present invention is
A galvo scanner,
A scanner driver for driving and controlling the galvano scanner;
Corresponding to each of a plurality of driving modes of the galvanometer scanner, an optimization data storage unit that stores and holds optimization data composed of combinations of optimum values of the circuit constants of the scanner driver,
The scanner driver is
An electronic trimmer for changing each circuit constant of the scanner driver;
A control unit that selects one of the optimization data stored and held in the storage unit according to an external input, and sets or updates the parameters of the electronic trimmer so that the selected optimization data is obtained. It is characterized by having.

  Here, the location of the optimized data storage unit may be one of the internal memory and the external memory of the scanner driver.

  Alternatively, the location of the optimized data storage unit can be any one of the internal memory and the external memory of the galvano scanner.

Next, the galvano scanner driven by the scanner driver of the present invention is:
A storage unit that stores and holds optimization data corresponding to each of a plurality of drive modes of the galvano scanner;
A controller that outputs the optimization data to the scanner driver in response to a request from the scanner driver;
The optimization data includes a combination of optimum values of circuit constants of the scanner driver obtained by driving the galvano scanner in the drive mode by the scanner driver.

The scanner driver for driving the galvano scanner of the present invention is:
An electronic trimmer for changing each circuit constant of the scanner driver;
A storage unit that stores and holds optimization data composed of combinations of optimum values of circuit constants set in advance according to a plurality of driving modes of the galvano scanner;
A control unit that selects one of the optimization data stored in the storage unit according to an external input, and sets or updates the parameters of the electronic trimmer so that the selected optimization data is obtained. It is characterized by having.

  In the present invention, the galvano scanner is actually driven by the scanner driver in various drive modes requested by the user, the circuit constants of the optimum scanner driver are obtained in each drive mode, and the drive mode is stored in the optimized data storage unit. The optimization data obtained every time is stored and held.

  Prior to the actual use of the galvano-type scanner system, a command for selecting a required drive form is given from the host device to the scanner driver. When receiving the external command, the control unit of the scanner driver reads the optimization data corresponding to the driving form from the optimization data storage unit, and sets the parameters of the electronic trimmer according to the optimization data.

  Even when the drive mode is changed to another specification, a command for selecting the changed drive mode is given from the host device to the scanner driver. When receiving the external command, the control unit of the scanner driver reads the optimization data corresponding to the driving form from the optimization data storage unit, and updates the parameters set in the electronic trimmer according to the optimization data.

  Therefore, according to the present invention, when the driving mode of the galvano scanner is changed, the circuit constant of the scanner driver can be automatically optimized based on a command from the host device. There is no need for manual adjustment of variable resistors as in the past, and adjustment work for optimizing each circuit constant of the scanner driver when changing the drive mode is performed easily, quickly and accurately. Is possible.

  Further, in the galvano scanner of the present invention, each circuit constant data optimized for a plurality of driving forms is stored in a storage unit of the galvano scanner having a large variation factor due to assembly factors, for example, its internal memory or the scanner. Is stored in an external memory mounted on a circuit board attached to the circuit board. When requested by the scanner driver, the optimization data stored in the storage unit is output. On the scanner driver side, the adjustment parameters in the scanner driver are rewritten by the optimization data supplied from the galvano scanner side.

  Therefore, even if it is a strict adjustment specification that cannot be achieved unless the galvano scanner and the scanner driver are connected and the galvano scanner is actually driven for adjustment, optimization data corresponding to the drive mode is selected. It can be realized by simple operation.

  In addition, for various combinations of galvano scanners and scanner drivers, optimization data of the scanner driver for each drive mode of the galvano scanner is obtained and stored, so that the combination of the scanner and scanner driver can be changed. Even in such a case, the driving characteristics of the scanner driver can be adjusted by a simple operation without being affected by variations in the operating characteristics of the galvano scanner. Therefore, the productivity and maintainability of the galvano scanner are greatly improved.

  Embodiments of a galvano scanner system to which the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is a schematic block diagram of the galvano scanner system of this example. The galvano scanner system 1 includes a galvano scanner 2, a scanner driver 3 for driving the galvano scanner 2, a controller 4 for controlling the scanner driver 3, a personal computer 5 and the like. doing.

  A dedicated command generation program is installed in the personal computer 5 of the command generator 6 and supplies a digital position command of the galvano scanner 2 to the controller 4. The controller 4 D / A converts the digital position command into a command voltage that is an analog position command, and supplies the command voltage to the analog drive circuit 30 of the scanner driver 3. The analog drive circuit 30 of the scanner driver 3 generates a scanner drive voltage based on the command voltage and applies it to the galvano scanner 2 to drive the galvano scanner 2 to a designated position.

  The galvano scanner 2 includes, for example, a finite rotation motor 11 and a scanning mirror 13 attached to the motor rotation shaft 12. The galvano scanner 2 is provided with a position sensor 14 for detecting the rotational angle position of the motor rotating shaft 12. The analog position detection output of the position sensor 14 is supplied to the controller 4 via the scanner driver 3. The controller 4 A / D converts the analog position detection output into digital position information. The digital position information is supplied to the personal computer 5. Based on the detected position of the galvano scanner 2, the galvano scanner 2 is feedback-controlled in a preset drive mode (drive pattern, drive speed, etc.).

  For example, in order to drive the galvano scanner 2 from the position A to the target position B, it is necessary to change the applied command voltage from the command voltage corresponding to the position A to the command voltage corresponding to the target position B. The change in the command voltage output from the command generator 6 is only a command to the final target position. Therefore, it is necessary to set the operation characteristics such as the path from the position A to the position B and the arrival time by adjusting the circuit constants of the analog drive circuit 30 of the scanner driver 3. Similarly, it is necessary to adjust the circuit constants of the analog drive circuit 30 of the scanner driver 3 so as to obtain characteristics suitable for various drive modes (load, drive pattern, response characteristics, etc.).

  In order to optimize the circuit constants of the scanner driver 3 according to each driving mode, in this example, the scanner driver 3 has a circuit constant setting / changing function.

  Referring to FIG. 2, the scanner driver 3 includes an analog drive circuit 30, a control unit 31 composed of a microcomputer, and an electronic trimmer 32. The control unit 31 includes a CPU, a ROM, and a RAM, and an optimized data storage area is prepared in the ROM, which corresponds to a plurality of periodic command input waveforms (driving forms). , Optimization data P1, P2, P3,... Composed of combinations of optimum values of driver circuit constants are stored and held, respectively. These digital data may be stored in a flash memory or the like in a rewritable state.

  When the control unit 31 receives a command designating one command input waveform from the upper command generator 6 side, the control unit 31 reads optimization data corresponding to the command input waveform designated by the command from the ROM. Then, a control signal is output to the electronic trimmer 32 according to the contents of the optimization data. The electronic trimmer 32 includes a plurality of resistor trimmers 33, a plurality of capacitor trimmers 34, and the like, and sets each circuit constant of the analog drive circuit 30 of the scanner driver 3 based on the optimization data.

  In the galvano scanner system 1 having this configuration, first, the galvano scanner 2 is actually driven in accordance with various drive modes requested by the user. Based on the actual driving state, each circuit constant of the analog driving circuit 30 of the scanner driver 3 optimum for each driving mode is obtained. Each obtained parameter is written in the ROM as optimized data for each drive mode.

  Prior to actual use, the command generator 6 gives a command to the scanner driver 3 to select a required drive mode. When the control unit 31 of the scanner driver 3 receives this external command, it reads out optimization data corresponding to the driving mode from the ROM, and performs analog driving of the scanner driver 3 by the resistor trimmer 33, the capacitor trimmer 34, and the like of the electronic trimmer 32. A resistance value, a capacitance value and the like for circuit constant adjustment of the circuit 30 are set according to the optimization data. As a result, the circuit constants of the scanner driver 3 are optimized according to the selected driving mode.

  In addition, when the drive mode is changed to another drive mode, the command generator 6 gives a command for selecting the changed drive mode to the scanner driver 3. When the control unit 31 of the scanner driver 3 receives such an external command, it reads the optimization data corresponding to the drive mode from the ROM, and updates the parameters set in the electronic trimmer 32 according to the optimization data. As a result, the operation characteristics of the analog drive circuit 30 of the scanner driver 3 are optimized in accordance with the changed drive mode.

  As described above, when the driving mode of the galvano scanner 2 is changed, the driver circuit constants can be automatically optimized based on a command from a higher-level device. This eliminates the need for manual adjustment of a variable resistor, etc., as in the past, and makes adjustment work for optimizing the driver circuit constants when changing the drive configuration simple, quick, and accurate. It becomes possible.

  Next, in the above example, the optimization data is stored and held in the scanner driver 3. Instead, it may be stored and held on the galvano scanner 2 side. That is, as shown in FIG. 3, optimization data (adjustment parameters A, B...) Is stored and held in the internal memory 21 (optimization data storage unit) of the control unit 20 of the galvano scanner 2. The controller 20 is set to output specified optimization data and supply it to the scanner driver 3 in response to a request from the analog drive circuit 30 of the scanner driver 3. Instead of the internal memory 21, as indicated by an imaginary line in FIG. 3, optimization data may be stored and held in an external memory 23 mounted on a circuit board 22 attached to the galvano scanner.

  On the scanner driver 3 side, the galvano scanner 2 side is requested to request optimization data corresponding to the drive mode specified by the external command, which includes the storage area 35 in the internal memory of the analog drive circuit 30. The optimization data supplied in accordance with is set in the storage area 35. Alternatively, the optimization data (adjustment parameter) set in the storage area 35 is rewritten with the supplied optimization data.

1 is a schematic configuration diagram of a galvano scanner system to which the present invention is applied. It is a schematic block diagram which shows the scanner driver of FIG. It is explanatory drawing which shows the example at the time of making optimization data memorize | store and hold | maintain at a galvanometer scanner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Galvano type scanner system 2 Galvano type scanner 3 Scanner driver 4 Controller 5 Personal computer 6 Command generator 11 Finite rotation type motor 12 Motor rotating shaft 13 Scanning mirror 14 Position sensor 30 Analog drive circuit 31 Control part 32 Electronic trimmer 33 Resistance trimmer 34 Capacitor trimmer

Claims (7)

In accordance with each of a plurality of driving modes of the galvano scanner, obtain optimization data composed of a combination of optimum values of each circuit constant of the scanner driver that drives the galvano scanner,
Each of the optimization data is stored and held in a form corresponding to the drive form in the scanner side storage part on the galvano scanner side or the driver side storage part on the scanner driver side,
By supplying an external signal designating one of the drive modes to the scanner driver, the optimization data associated with the designated drive mode is sent to the scanner-side storage unit or the driver Output from the side storage unit,
In the scanner driver, according to the output optimization data, each circuit constant of the scanner driver is set or each set circuit constant is changed, and the scanner driver of the galvano scanner is driven Characteristics adjustment method. In the driving characteristic adjustment method of the scanner driver of the galvano scanner according to claim 1,
A driving characteristic adjustment method for a scanner driver of a galvano scanner, wherein the plurality of driving forms of the galvano scanner are at least loads having different loads, drive patterns, and response characteristics. A galvo scanner,
A scanner driver for driving and controlling the galvano scanner;
Corresponding to each of a plurality of driving modes of the galvanometer scanner, an optimization data storage unit that stores and holds optimization data composed of combinations of optimum values of the circuit constants of the scanner driver,
The scanner driver is
An electronic trimmer for changing each circuit constant of the scanner driver;
A control unit that selects one of the optimization data stored and held in the storage unit according to an external input, and sets or updates the parameters of the electronic trimmer so that the selected optimization data is obtained. A galvano-type scanner system characterized by comprising: The galvano scanner system according to claim 3,
The galvano scanner system, wherein the location of the optimized data storage unit is one of an internal memory and an external memory of the scanner driver. The galvano scanner system according to claim 4,
The galvano scanner system is characterized in that the location of the optimized data storage unit is one of an internal memory and an external memory of the galvano scanner. A galvano scanner driven by a scanner driver,
A storage unit that stores and holds optimization data corresponding to each of a plurality of drive modes of the galvano scanner;
A controller that outputs the optimization data to the scanner driver in response to a request from the scanner driver;
The galvano scanner characterized in that the optimization data includes a combination of optimum values of circuit constants of the scanner driver obtained by driving the galvano scanner in the drive mode by the scanner driver. A scanner driver for driving a galvano scanner,
An electronic trimmer for changing each circuit constant of the scanner driver;
A storage unit that stores and holds optimization data composed of combinations of optimum values of circuit constants set in advance according to a plurality of driving modes of the galvano scanner;
A control unit that selects one of the optimization data stored in the storage unit according to an external input, and sets or updates the parameters of the electronic trimmer so that the selected optimization data is obtained. A scanner driver for a galvano-type scanner.

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