TW201702773A - Numeric control system and method of searching original point mechanism - Google Patents

Abstract

The numeric control system of searching original point comprising a controller, a driver, and a processing machine. The machine comprises a motor, mechanical bed, a motor encoder, and an incremental linear scale. When the mechanical bed is moved to the motor original point, the incremental original point outputs a detecting signal and a pulsed signal in accordance with the detecting signal to the controller. The pulsed signal is converted into a position signal when the controller receives the pulsed signal and the detecting signal which is detected first, and planning the displacement amount of the mechanical bed according to a velocity of searching original point and the position signal, and further converting the displacement amount of the mechanical bed into a new movement command. Finally, the driver drives the mechanical bed to the original point of the mechanical bed in accordance with the new movement command.

Description

Numerical control system with finding origin mechanism and its finding method

The present invention relates to a numerical control system, and more particularly to a numerical control system having a mechanism for finding an origin and a method for finding an origin.

Generally speaking, when machining, the processing machine has a fixed mechanical origin, and the coordinate system corresponding to the mechanical origin is a fixed mechanical coordinate system, which is used for processing. Coordinate systems, such as workpiece coordinate system or external coordinate offset system, are based on the coordinate system of the mechanical origin, and perform calculations or motion planning of other coordinate systems relative to the mechanical coordinate system. Therefore, the mechanical origin For machining, it can be considered as a benchmark for machining. However, the mechanical origin position information will be lost each time the processing machine is powered off. Therefore, it is necessary to find the position of the machine origin position before turning on the processing machine for processing.

At present, the method for finding the origin of the machine is to set an axial position of the origin switch to the bed of the processing machine. The controller switches the processing machine to the origin mode by the controller and triggers a search for the origin signal. The bed starts to move toward the origin switch, until the bed touches the origin switch, the controller controls the motor connected to the bed to reverse, and the motor sends an index signal as a mark every revolution, and the index The signal represents a location information. Finally, the bed is placed at the position represented by the index signal, and the position is regarded as the mechanical origin, so that the search for the origin is completed.

In the case of setting the origin switch, the origin switch must be additionally set, and the relevant wiring of the origin switch must be additionally set. Therefore, in the installation work of the entire processing machine, it is necessary to install the origin switch and its additional cost. The installation time of the relevant wiring, and the origin switch and its wiring occupy part of the space of the entire processing machine, so that the axial movement distance of the processing machine is limited, and thus the processing size is affected. limit. In addition, long-term search for the origin by touching the origin switch will cause the origin switch to be damaged, resulting in abnormal operation of the origin, thereby affecting the overall processing quality and speed.

In order to solve the problems described in the prior art, the main object of the present invention is to provide a numerical control system having a mechanism for finding an origin, which records the position of the motor origin by a motor encoder and instantly detects the bed with an incremental optical scale. The detection signal is output to the controller at the position closest to the motor origin. This position is the origin position of the bed. In this way, the origin switch is not required to be placed in the processing machine, and thus the machining distance is not reduced. It does not cause the origin operation to be abnormal due to the touch of the origin switch, which affects the processing quality and speed.

According to the above object, the main object of the present invention is to provide a numerical control system having a mechanism for finding an origin, which is composed of a controller, a driver and a processing machine. The driver has a first end and a second end, and the controller has a controller. a first end, a second end and a third end, the third end of the controller is electrically connected to the first end of the driver, the processing machine comprises a bed, a motor and a position information providing device, the motor has a first end, a second end and a third end, the first end of the motor is electrically connected to the second end of the driver, the second end of the motor is electrically connected to one end of the bed, and the motor is used to drive the bed The position information providing device has a first end, a second end, a third end and a fourth end, and the first end of the position information providing device is electrically connected to the third end of the motor, and the position information providing device The second end is electrically connected to the other end of the bed, the third end of the position information providing device is electrically connected to the second end of the driver, and the fourth end of the position information providing device is electrically connected to the first end of the controller And second The controller is configured to allow the user to set a numerical control system having a mechanism for finding the origin to enter a search origin mode and set a search origin speed, and the controller triggers a search for the origin signal, and the position information providing device The origin position of the three-terminal output motor is to the driver, and the driver outputs the origin position of the motor to the controller. After receiving the origin position of the motor, the controller sends a motion command to the driver, and the driver drives the motor to drive the bed according to the motion command. Moving, when the bed is positioned to the origin position of the motor, the position information providing device starts outputting a detection signal and a pulse signal corresponding to the detection signal to the controller, and the controller receives the first detected detection. After the signal is measured, the pulse signal is converted into a position Signal, the controller plans a motion displacement amount according to finding the origin speed and the position signal, and the controller outputs a new motion command to the driver according to the motion displacement amount, and the driver drives the bed table to the origin position of the bed according to the new motion instruction.

In accordance with the above objects, the present invention further provides a method for finding an origin of a numerical control system for finding an origin position of a bed of a numerical control system, comprising the steps of: confirming an electrical connection to the bed Whether the origin of the motor of the station is completed; setting a search for the origin speed and setting the numerical control system into a search for origin mode; triggering a search for the origin signal and issuing a motion command to a drive electrically connected to the bed, The driver drives the bed to move by the motion command; when the bed is positioned to the origin position of the motor, a controller electrically connected to the driver starts to output a detection signal and a pulse signal corresponding to the detection signal, and the pulse The number of pulses of the signal represents the distance between the origin position of the motor and the position of the bed; when receiving the first detected detection signal, the controller converts the pulse signal into a position signal; according to the speed of finding the origin And the position signal is used to plan the displacement of one of the bed tables, and then convert the motion displacement amount into a new motion command and output it to the driver; and according to the new The positioning command driving the movable bed of the bed to the original position.

It can be seen from the above that the numerical control system with the mechanism for finding the origin of the present invention does not need to be equipped with the origin switch, so the machining distance is not reduced, and the origin operation is not caused by the touch of the origin switch. Processing quality and speed.

1‧‧‧ controller

11‧‧‧User interface

12‧‧‧ Looking for the origin control module

121‧‧‧pulse signal reading unit

122‧‧‧Conversion unit

123‧‧‧Sports Planning Unit

124‧‧‧Detection unit

2‧‧‧ Drive

3‧‧‧Processing machine

31‧‧‧Motor

32‧‧‧ Beds

33‧‧‧Location information providing device

331‧‧‧Motor encoder

332‧‧‧Incremental optical ruler

S1~S8‧‧‧Steps

1 is a schematic diagram of a numerical control system having a mechanism for finding an origin according to an embodiment of the present invention.

Figure 2 is an internal schematic diagram of a numerical control system having an origin finding mechanism in accordance with an embodiment of the present invention.

Figure 3 is a flow chart showing a method for finding the origin of the origin finding mechanism according to an embodiment of the present invention.

Since the present invention discloses a numerical control system having a mechanism for finding the origin, the manner in which the motor is used to drive the bed is well understood by those skilled in the relevant art. The description below is not fully described. At the same time, the drawings in the following texts express the system structure and function diagrams related to the classification, identification and measurement of the pipe fittings of the present invention, and are not completely drawn according to the actual dimensions, which are first described.

The present invention relates to a numerical control system for having a mechanism for finding an origin, and more particularly to a numerical control system having a mechanism for finding an origin including a controller, a driver, and a processing machine.

First, please refer to FIG. 1. FIG. 1 is a schematic diagram of a numerical control system having a mechanism for finding an origin according to an embodiment of the present invention.

As shown in FIG. 1, a numerical control system having a mechanism for finding an origin is composed of a controller 1, a driver 2, and a processing machine 3. The controller 1 has a first end. a second end and a third end, the driver 2 has a first end and a second end, and the processing machine 3 includes a motor 31, a bed 32 and a position information providing device 33. The motor 31 has a first The position information providing device 33 has a first end, a second end, a third end and a fourth end, and the first end and the second end of the controller 31 are electrically connected to the end, the second end and the third end. Connected to the fourth end of the location information providing device 33, the third end of the controller 1 is electrically connected to the first end of the driver 2, and the second end of the driver 2 is electrically connected to the first end of the motor 31 and the position information. The third end of the motor 31 is electrically connected to one end of the bed 32, and the third end of the motor 31 is electrically connected to the first end of the position information providing device 33, and the position information providing device 33 The second end is electrically connected to the other end of the bed 32; wherein the controller 1 is used for setting the user Looking numerical control system into the origin of a homing mechanism and setting a homing mode speed.

Please continue to refer to FIG. 1. First, the user must confirm whether the home position of the motor 31 is completed. If the setting has not been completed, the numerical control system is switched to the manual mode, and the user manually moves the bed 32 to The origin position of the motor 31; then, the user sets a numerical control system having a mechanism for finding the origin to enter the search origin mode and set the search origin speed, the controller 1 triggers a search for the origin signal, and the position information providing device 33 The third end outputs the origin position of the motor 31 to the driver 2, and the driver 2 outputs the origin position of the motor 31 to the controller 1. After receiving the origin position of the motor 31, the controller 1 issues a motion command to the driver 2, and the driver 2 After receiving the motion command, the drive motor 31 drives the bed 32 to perform After the bed 32 is positioned to the origin position of the motor 31, the position information providing device 33 starts outputting a detection signal and a pulse signal corresponding to the detection signal to the controller 1, and the number of pulses of the pulse signal is representative. The distance between the origin position of the motor 31 and the position of the bed 32, when the controller 1 receives the first detected detection signal, the controller 1 converts the pulse signal into a position signal, and the position signal is Representing the origin position of the bed 32, the controller 1 plans the displacement amount of one of the bed tables 32 according to the origin speed and the position signal, and then converts the motion displacement amount into a new motion command and outputs it to the driver 2, and the driver 2 The bed 32 is driven to the home position of the bed according to the new motion command.

Next, please refer to FIG. 2, which is an internal schematic diagram of a numerical control system having an origin finding mechanism according to an embodiment of the present invention.

As shown in FIG. 2, the controller 1 is composed of a user interface 11 and a search origin control module 12. The user interface 11 is electrically connected to the search origin control module 12 to find the origin control mode. The group 12 includes a pulse signal reading unit 121, a converting unit 122, a motion planning unit 123, and a detecting unit 124. One end of the pulse signal reading unit 121 is connected to one end of the converting unit 122, and one of the motion planning units 123 The first end is connected to the other end of the conversion unit 122 and the user interface 11, the second end of the motion planning unit 123 is connected to one end of the detection unit 124, and the third end of the motion planning unit 123 is connected to the second of the driver 2. The position information providing device 33 of the processing machine 3 includes a motor encoder 331 and an incremental optical scale 332. The motor encoder 331 has a first end and a second end, and the motor encoder 331 is, for example, a The absolute motor encoder 332 has a first end and a second end. The first end of the motor encoder 331 is electrically connected to the third end of the motor 31, and the second end of the motor encoder 331 Electrically connected to the second of the driver 2 The first end of the incremental optical scale 332 is electrically connected to the other end of the bed 32. The second end of the incremental optical scale 332 is electrically connected to the other end of the detecting unit 124 and the pulse signal reading unit. At the other end of the 121, the motor encoder 331 is used for storing the motor origin position and transmitting the origin position of the motor 31 to the driver 2. The incremental optical scale 332 is used for outputting the detection signal and the pulse corresponding to the detection signal. The signal is sent to the detecting unit 124 of the controller 1.

Then, please continue to refer to FIG. 2, the user interface 11 is used for the user to set the numerical control system with the mechanism for finding the origin to enter the search origin mode and set the search origin speed. After the face 11 is set to enter the search origin mode, the search for the origin signal is triggered. At the same time, the second end of the motor encoder 331 outputs the stored origin position of the motor 31 to the driver 2, and the driver 2 takes the origin of the motor 31. The position is output to the third end of the motion planning unit 123. After receiving the origin position of the motor 31, the third end of the motion planning unit 123 performs motion planning and sends a motion instruction to the driver 2 at the third end of the motion planning unit 123. 2 After receiving the motion command, the driving motor 31 drives the bed 32 to move. When the bed 32 is positioned to the origin position of the motor 31, the incremental optical scale 332 starts to output the detecting signal and the corresponding detecting signal respectively. The pulse signal to the detecting unit 124 and the pulse signal reading unit 121, when the detecting unit 124 receives the first detected detecting signal, outputs the detecting signal to the motion planning unit 123, and the pulse signal reading unit 121, the received pulse signal is output to the conversion unit, and the conversion unit converts the pulse signal into a position signal and outputs a position signal to the motion planning unit 123, where the position signal represents the bed After the motion detection unit 123 receives the detection signal, the motion planning unit 123 plans the motion displacement amount of the bed according to the origin speed and the position signal, and outputs the motion displacement amount to the conversion unit 122 to convert the motion displacement amount into a new one. The motion command, the conversion unit 122 outputs a new motion command to the motion planning unit 123, and the motion planning unit 123 outputs a new motion command to the driver 2, and the driver 2 drives the motor 31 to drive the bed 32 to the bed origin position according to the new motion command. First, complete the action of finding the origin of the bed.

Finally, please refer to FIG. 3, which is a flow chart of a method for finding the origin of the origin finding mechanism according to an embodiment of the present invention, which includes the following steps.

Step S1: The user confirms whether the home position of the motor 31 electrically connected to the bed 32 is completed. When the user confirms that the home position of the motor 31 has been set, step S2 is performed, and if the user confirms the motor 31 If the original position has not been set yet, step S3 is executed to switch the numerical control system to the manual mode, and the user manually moves the bed 32 to the origin position of the motor 31; step S2: the user sets the original search The point speed and the set value control system enters the search origin mode; step S4: triggers the search for the origin signal, and the motor encoder 331 outputs the origin position of the motor 31 to the driver 2, and the driver 2 outputs the origin position of the motor 31 again. To the motion planning unit 123, exercise The planning unit 123 outputs a motion command to the driver 2, and the driver 2 drives the motor 31 to move the bed 32 by the motion command; Step S5: After the bed 32 is positioned to the origin position of the motor 31, the incremental optical scale 332 starts. The detection signal and the pulse signal corresponding to the detection signal are respectively output to the detecting unit 124 and the pulse signal reading unit 121, and the pulse number of the pulse signal represents the distance between the origin position of the motor 31 and the position of the bed 32. Step S6: When the detecting unit 124 of the controller 1 receives the first detected detecting signal, the detecting unit 124 outputs the detecting signal to the motion planning unit 123, and the pulse signal reading unit 121 The received pulse signal is output to the conversion unit 122, and the conversion unit 122 converts the pulse signal into a position signal and outputs it to the motion planning unit 123. The position signal represents the origin position of the bed 32; step S7: the motion planning unit 123 receives After the detection signal, the motion displacement amount of the bed 32 is planned according to the origin speed and the position signal, and the motion displacement amount is output to the conversion unit 122 to be converted into a new motion command and input. Exiting to the motion planning unit 123, the motion planning unit 123 outputs a new motion command to the driver 2; and step S8: the driver 2 drives the bed 32 to the home position of the bed 32 according to the new motion command.

In the above embodiment of the present invention, the processing machine 3 may be a processing machine used in one of a lathe, a milling machine, and a turning and milling machine, and the invention is not limited thereto.

In the above embodiment of the present invention, the motor encoder records the origin position of the motor, and the incremental optical scale instantly detects the position of the bed closest to the origin of the motor, and outputs a detection signal to the controller, and the detected signal is detected. The position of the bed closest to the motor origin is the original position of the bed. In this way, it is not necessary to set the origin switch in the processing machine, so the machining distance is not reduced, and the origin switch is not touched. It leads to abnormal operation of the origin, which affects the processing quality and speed.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; the above description should be apparent to those skilled in the relevant art. And other equivalent changes or modifications that are made without departing from the spirit of the invention, are intended to be included in the scope of the claims.

1‧‧‧ controller

11‧‧‧User interface

12‧‧‧ Looking for the origin control module

121‧‧‧pulse signal reading unit

122‧‧‧Conversion unit

123‧‧‧Sports Planning Unit

124‧‧‧Detection unit

2‧‧‧ Drive

3‧‧‧Processing machine

31‧‧‧Motor

32‧‧‧ Beds

33‧‧‧Location information providing device

331‧‧‧Motor encoder

332‧‧‧Incremental optical ruler

Claims (7)

A numerical control system having a mechanism for finding an origin is composed of a controller, a driver and a processing machine. The driver has a first end and a second end, and the controller has a first end and a second end. And the third end of the controller is electrically connected to the first end of the driver, the processing machine comprises a bed, a motor and a position information providing device, the motor has a first One end, a second end and a third end, the first end of the motor is electrically connected to the second end of the driver, and the second end of the motor is electrically connected to one end of the bed, The motor is configured to drive the movement of the bed. The position information providing device has a first end, a second end, a third end and a fourth end. The first end of the position information providing device is electrically connected to the The third end of the position information providing device is electrically connected to the other end of the bed, and the third end of the position information providing device is electrically connected to the second end of the driver The fourth end electrical property of the location information providing device Connecting to the first end and the second end of the controller, the controller is configured to allow the user to set the numerical control system with the mechanism for finding the origin to enter a search origin mode and set a search origin Speed, the controller triggers a search for an origin signal, the third end of the position information providing device outputs an origin position of the motor to the driver, and the driver outputs the origin position of the motor to the controller, the control After receiving the origin position of the motor, the device sends a motion command to the driver, and the driver drives the motor to move the bed according to the motion command. When the bed is positioned to the origin position of the motor, the position is The information providing device starts to output a detection signal and a pulse signal corresponding to the detection signal to the controller. After receiving the first detected detection signal, the controller converts the pulse signal into a a position signal, the controller plans a motion displacement amount according to the search origin speed and the position signal, and the controller outputs a new motion command according to the motion displacement amount to Driver, the driver drives the bed to the original position of the positioning of the bed according to the new motion command. According to the numerical control machine with the origin finding mechanism described in claim 1, wherein the pulse number of the pulse signal represents the distance between the origin position of the motor and the position of the bed. According to the numerical control machine with the origin finding mechanism described in claim 1, wherein the controller includes a user interface and a search origin control module, and the user interface is electrically connected to the search source. a point control module, the search origin control module includes: a pulse signal reading unit for receiving the pulse signal output by the position information providing device and outputting the pulse signal; and a conversion unit connected at one end thereof Receiving, by the pulse signal reading unit, the pulse signal output by the pulse signal reading unit, converting the pulse signal into the position signal, and converting the motion displacement into the new motion instruction; The measuring unit has one end connected to the position information providing device, the detecting unit receiving the detecting signal output by the position information providing device and outputting the detecting signal; and a motion planning unit having a first end and a a second end and a third end, the first end of the motion planning unit is connected to the conversion unit and the user interface, and the second end of the motion planning unit Connected to the detecting unit, the third end of the motion planning unit is connected to the driver, the first end of the motion planning unit receives the position signal output by the converting unit and the search output by the user interface The second end of the motion planning unit receives the detection signal output by the detection unit, and the third end of the motion planning unit receives the origin position of the motor output by the driver, the motion The planning unit sends the motion command to the driver, and the motion planning unit plans the motion displacement amount of the bed according to the position signal, and outputs the motion displacement amount to the conversion unit, and the third of the motion planning unit The terminal outputs the new motion command to the driver. A numerical control machine having a mechanism for finding an origin according to claim 3, wherein the position information providing device of the processing machine comprises: a motor encoder having a first end and a second end The first end of the motor encoder is electrically connected to the third end of the motor, and the second end of the motor encoder is electrically connected to the second end of the motor for storing the original of the motor Point position and pass the origin position of the motor to the drive; and An incremental optical scale having a first end and a second end, the first end of the incremental optical scale being electrically connected to the other end of the bed, the incremental optical ruler The two ends are electrically connected to the detecting unit and the pulse signal reading unit, and the incremental optical meter is configured to respectively output the detecting signal and the pulse signal corresponding to the detecting signal to the detecting unit and The pulse signal reading unit. A numerical control machine having a mechanism for finding an origin according to the fourth aspect of the patent application, wherein the motor encoder is an absolute motor encoder. A method for finding an origin of a numerical control system for finding an origin position of a bed of the numerical control system, comprising the steps of: confirming whether an origin of a motor electrically connected to the bed is set Setting a search for the origin speed and setting the numerical control system to a search origin mode; triggering a search for the origin signal and issuing a motion command to a driver electrically connected to the bed, the driver by the motion command Driving the bed to move; when the bed is positioned to the origin position of the motor, a controller electrically connected to the driver starts to output a detection signal and a pulse signal corresponding to the detection signal, The number of pulses of the pulse signal represents the distance between the origin position of the motor and the position of the bed; when receiving the first detected detection signal, the controller converts the pulse signal into a position signal And calculating a motion displacement amount of the bed according to the search origin speed and the position signal, and converting the motion displacement amount into a new motion command, and outputting to the driver; According to the new movement command to drive the bed to the original position of the positioning of the bed. The method for finding an origin of a numerical control system according to claim 6 of the patent application scope, further comprising the steps of: switching the numerical control system to a manual mode when the origin of the motor is not completed, The user manually moves the bed to the origin of the motor.