KR100412740B1 - Open-type numerical control apparatus - Google Patents

Abstract

An open numerical controller is disclosed. The open numerical control device disclosed includes an interpreter that reads a machining program in each block unit from a machining program memory, etc. in each cycle, in order to machine a desired shape through a machine tool, and an interpolation parameter and a feed position of a tool in each cycle. In the numerical control device comprising a reading interpolator and a position controller for comparing the position to be transferred by the tool with the actual position read from the motor encoder of the machine tool at every cycle, the numerical control device comprising: An interpreter event DLL for enabling modification; An interpolator event DLL for modifying interpolator internal variables; And a position controller event DLL for allowing modification of position controller internal variables. According to the present invention, since it is easy to add a new function to the numerical control device through the event, it is possible to configure the numerical control device for the users themselves, which has the advantage of improving productivity.

Description

OPEN-TYPE NUMERICAL CONTROL APPARATUS}

The present invention relates to an open numerical control device, and more particularly, to an open numerical control device for facilitating modification of existing functions or addition of new functions.

In general, a numerical control device for controlling a machine tool (NC or Computer Numerical Control) refers to commanding a position of a work piece with numerical information corresponding thereto. Refers to a device that controls to process through.

These numerical control devices are closed so that the rules of the machine tool manufacturer have been unilaterally defined and used according to the rules.

Therefore, it is not possible to modify some functions of the numerical control device or to add new functions such as a new interpolation method in a company, a school, or an institute of the institution that purchased the numerical control device of the machine tool. I had to ask.

In this case, they had to disclose their own new technology or know-how to the manufacturer, and it took a lot of time to apply it, and there was no guarantee that it would be applied.

As described above, since the numerical control device of the conventional machine tool is a closed type, it is impossible for a company that purchases it to modify some of the functions of the numerical control device or add a new function.

And in order to require new features and demand from the numerical control device manufacturers, they had to disclose their own new technology or know-how, causing damage to the manufacturer.

In addition, after requesting the company to add a new function, it requires a considerable time until the actual use of this function, there is a problem that the productivity of the product using the device is lowered because of the availability of the device.

The present invention was created to solve the above problems, and an object of the present invention is to provide an open numerical control device capable of adding new functions to be configured for use by a user, thereby improving productivity.

1 is a block diagram schematically showing the configuration of an open numerical control device according to the present invention.

FIG. 2 is a schematic view of a flowchart of event execution in the interpreter of FIG. 1; FIG.

3 shows an event registration screen on a computer.

4 is a diagram showing an actual execution screen on the numerical controller.

<Description of Symbols for Main Parts of Drawings>

11. Interpreter Event DLL

12. Interpolator Event DLL

13. Position Controller Event DLL

21. Analyzer

22. Interpolator

23. Position controller

41. Interpreter event function

42. Interpolator event function

43. Position Controller Event Function

The open numerical control device of the present invention for achieving the above object is an analyzer for reading the machining program from the machining program memory or the like every block in order to machine the desired shape through the machine tool, and every cycle It has an interpolator that reads the interpolation parameters and the feed position of the tool every time, and a position controller that performs position control by comparing the position to be transferred by the tool every time and the actual position read from the motor encoder of the machine tool. A control device comprising: an interpreter event DLL for modifying said interpreter internal variables; An interpolator event DLL for modifying interpolator internal variables; And a position controller event DLL for allowing modification of position controller internal variables.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a block diagram schematically showing the configuration of an open numerical control device according to the present invention.

Referring to the drawings, the open numerical control device according to the present invention adds an interpreter event DLL 11, an interpolator event DLL 12, and a position controller event DLL 13 so that a user can implement it through them. It is to add a new function.

In order to machine the desired shape through the machine tool, the numerical control device reads the machining program from the machining program memory or another storage device in units of blocks at every analyzer cycle and analyzes the block in the analyzer 21. Through this analysis, the feed position of the tool to be moved in the block, the motion of the main axis, and the interpolation parameters are calculated and stored in the interface 31 between the analyzer 21 and the interpolator 22, and the interpolator 22 is Read the interpolation parameters and the feed position of the tool from the interface 31 for each interpolator cycle, calculate the position and feed rate to go to the interpolator cycle, and then interface 32 of the interpolator 22 and the position controller 23. Store in

The position controller 23 performs position control by comparing the position to be transferred by the tool from the interface 32 with the actual position read from the motor encoder of the machine tool at every sampling period, and performs position control and transfer to the motor driver of the machine tool. Export the to process the desired shape.

Meanwhile, in FIG. 1, the interpreter event function 41 is a collection of functions necessary for modifying an interpreter 21 internal variable in the interpreter event DLL 11, and the interpolator event function 42 is an interpolator event. This is a collection of functions necessary to allow DLL 12 to modify internal variables of interpolator 22.

The position controller event function 43 is a collection of functions necessary for enabling the position controller 23 to modify internal variables of the position controller 23 in the position controller event DLL 13.

Referring to the operation of the open numerical control device according to the present invention having the configuration as described above are as follows.

Referring again to the drawings, the open numerical control device according to the present invention relates to the opening of the numerical value control device for the machine tool, and includes all of the general functions and an analyzer (eg, modifications of existing functions or addition of new functions). 21) A function capable of executing a function by calling an event in order to insert an event into the interpolator 22 and the position controller 23 to be called externally and to modify an internal variable externally. It is set aside so that internal variables can be modified in the function.

Before explaining this in more detail, the terminology used here is briefly explained.

First, the event refers to an event detected by the interpreter 21, the interpolator 22, and the position controller 23. Each event has these events, and each of these processes has an interpreter event, an interpolator event, and a position controller. It is called an event.

Numerical controller software designers make externally accessible events and internal variables of their routines accessible to certain parts of each software module.

Then, when the user registers the event to use in the event DLL and then calls the event, the user branches to the event of each routine to execute the event function. At this time, the user can change the value of the internal variable that needs to be changed or read the value.

And internal variable refers to the variable necessary to control the function of the machine tool inside the numerical control device. For example, the interpolation variable that defines the type of interpolation in the interpolator 22 is defined as 1 (= linear interpolation) and 2 (= circular interpolation) by default. If you want to add it, you can define the number to perform the new function in the interpolation variable, modify this variable in the corresponding event, and then add your own NURBS interpolation routine in the event of the routine where the interpolation is executed.

A DLL is also a collection of small programs that can be called when needed by a large program running inside a computer. This dll file has almost a file extension of .dll. It is not dynamically compiled with the main program, but rather dynamically linked with programs that use it at runtime.

Therefore, the user can make an event DLL that includes user-defined and developed functions separately from the general execution modules of the numerical control device and dynamically call and use the numerical control device.

Next, the operation of the open numerical control device according to the present invention will be described in more detail.

First, the user determines an event required to add a new function and registers the event so that it can be recognized at the time of booting the numerical controller. Add the necessary functionality to the event and call the corresponding event function in each module as needed. Then, by calling function, internal variable of module is changed and new function can be executed.

2 shows a flow chart of the event intervention in the interpreter 21.

As shown, the performance flow diagrams in the interpolator 22 and the position controller 23 are the same and thus omitted, and in FIG. 2 the interpreter 21 and the interpreter event function 41 are included in the modules of the interpreter 21. Part, and the interpreter event DLL 11 is a part that the user must configure to add a new function.

When the interpreter 21 reads and analyzes the part program and encounters an event (hereinafter, Event) 1, it is checked whether the event 1 is registered for use in the interpreter event DLL 11.

If it is registered, it means that it is being used by the interpreter event DLL 11, so it jumps to Event1 of the interpreter event DLL 11, executes the routine added by the user, and reads or interprets the internal variables of the interpreter 21. In order to call the EventFn1 () function, it branches back to the part of the interpreter event function (41) to read or change the internal variables of the interpreter (21) and then go to Event1 of the interpreter event DLL (11) to execute the rest of the routine. do.

Then, it returns to the part which called Event1 in the interpreter 21, and continues with other execution routines. If you meet Event2 during execution, it will be executed as above.

Meanwhile, in the accompanying drawings, FIG. 3 illustrates an event registration screen on a computer. In FIG. 3, reference mark 'A' refers to a registration key when a numerical control device boots. Will be registered.

And 'B' shows that the user can add up to four DLLs per function, and 'C' can be used by adding events and functions that the user wants to add to the numerical controller to IprEvent1.dll. It is shown that there is.

In addition, Figure 4 shows the actual execution screen of the numerical control device.

As described above, the open numerical control device according to the present invention has the following effects.

Events make it easy to add new features to the numerical controller, allowing users to configure the numerical controller for themselves, improving productivity.

In addition, buyers of machine tool numerical controllers can modify the functions they need or add new functions through the event, thus preserving their own know-how.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (2)

In order to machine the desired shape through the machine tool, an interpreter reads the machining program from the machining program memory, etc. at every block unit, an interpolator reads the interpolation parameters and the feed position of the tool every cycle, and every cycle In the numerical control device having a position controller for performing position control by comparing the position to be transferred by the tool with the actual position read from the motor encoder of the machine tool, An interpreter event DLL for modifying the interpreter internal variables; An interpolator event DLL for modifying interpolator internal variables; And a position controller event DLL for enabling modification of position controller internal variables. The method of claim 1, An interpreter event function that collects functions necessary for modifying the interpreter internal variables in the interpreter event DLL; An interpolator event function which collects functions necessary for modifying the interpolator internal variable in the interpolator event DLL; And a position controller event function that collects functions necessary for modifying a position controller internal variable in the position controller event DLL.