JPH0916263A - Numerical controller - Google Patents

Abstract

PURPOSE: To perform operation for positioning efficiently by using a manual pulse generator by converting a fast-forward pulse speed into an integral multiple of set magnification. CONSTITUTION: The manual pulse generator 11 generates a pulse speed by the rotation of a handle. With a manual handle feed quantity setting switch 12, magnification is set. A movement quantity calculating means 21 doubles the pulse speed from the manual pulse generator 1 to find a double pulse speed. The fast-forward pulse speed is converted into an integral multiple of the set magnification and the double pulse speed is compared with the fast-forward pulse speed converted into the integral multiple. When the double pulse speed is larger in this case, the fast-forward pulse speed which is converted into the integral multiple is outputted as a clamp pulse speed to an axis control circuit 26. Consequently, the movement quantity of a cutting tool is easily grasped and the positioning operation, etc., can be done efficiently by using the manual pulse generator 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller, and more particularly to a numerical controller having a manual pulse generator.

[0002]

2. Description of the Related Art Numerical control devices use a manual pulse generator to manually move the cutting tool accurately.
The manual pulse generator is arranged on the machine operation panel, and a manual handle feed amount setting switch is simultaneously provided as a doubling switch which is a switch for doubling the pulse speed from the manual pulse generator. The machine tool operator sets the magnification of the manual handle feed amount setting switch, finely adjusts the feed amount of the cutting tool while turning the handle of the manual pulse generator, and performs operations such as positioning with respect to the target coordinate value. To go. At this time, if you try to move the cutting tool fast, increase the magnification of the manual handle feed amount setting switch, and rotate the handle of the manual pulse generator fast to generate a fast doubling pulse speed, the speed of the servo motor will be very large. May be calculated and the fast-forward speed may be exceeded. Therefore, in order to prevent the doubling pulse speed that would exceed the rapid feed speed from being output to the axis control circuit, the doubling pulse speed is clamped at the rapid feed pulse speed [pulse / interpolation cycle] corresponding to the rapid feed speed.

[0003]

The fast-forward pulse speed is a value calculated by converting the fast-forward speed into a pulse speed per interpolation cycle. If the doubling pulse speed output from the manual pulse generator is set to exceed the fast-forwarding pulse speed, it will be clamped at the fast-forwarding pulse speed as described above. It was difficult to position in the double position, and it was necessary to set another magnification.

Further, there are many troublesome points such as it is difficult to grasp the exact position of the cutting tool. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a numerical control device that can efficiently perform operations such as positioning using a manual pulse generator.

[0005]

In a numerical controller having a manual pulse generator that outputs a pulse speed according to a rotation speed, the pulse speed is increased as a doubling pulse speed according to a magnification from a doubling switch, and the doubling pulse speed is increased. Is greater than a predetermined pulse speed, the predetermined pulse speed is converted into an integral multiple of the multiplication factor of the doubling switch, and the moving amount calculation means has the predetermined pulse speed as the clamp pulse speed. A controller is provided.

[0006]

The manual pulse generator generates the pulse speed by turning the handle. The manual handle feed amount setting switch sets the magnification. The movement amount calculation means doubles the pulse speed from the manual pulse generator to obtain the doubled pulse speed. Then, the fast-forward pulse speed is converted into an integral multiple of the multiplication switch magnification, and the doubled pulse speed and the fast-forward pulse speed converted into an integral multiple are compared. At this time, if the doubling pulse speed is higher, the fast-forwarding pulse speed converted into an integral multiple is output, and if not, the doubling pulse speed is output to the axis control circuit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a conceptual diagram of the present invention. The present invention comprises a manual pulse generator 11, a manual handle feed amount setting switch 12, and a movement amount calculating means 21.

Set the manual handle feed amount setting switch 12 to 1
It is assumed that the time is set to 00 times and the handle of the manual pulse generator 11 is rotated to generate 100 pulses. Also, the rapid feed speed is 10000 [mm / min] and the interpolation cycle (ITP)
Is 8 [msec] and the coordinate grid spacing is 0.001 [mm]
And The moving amount calculating means 21 calculates the doubling pulse speed as 10,000 (100 × 100) pulses. Next, the movement amount calculation means 21 calculates the rapid feed pulse speed.
Since the fast-forward pulse speed is a value calculated by converting the fast-forward speed into a pulse speed per interpolation cycle, it is calculated as 1333 [pulse / ITP] from the above set value. The calculation method will be described later. And the movement amount calculation means 21
Is the rapid traverse pulse speed of 1333 [pulse / IT
P] is converted into an integral multiple of the multiplication factor of the doubling switch to obtain 1300 [pulses / ITP], which is the clamp pulse speed. Then, the clamp pulse speed and the doubling pulse speed are compared. In this case, since the doubled pulse speed exceeds the clamp pulse speed, the clamp pulse speed 1300 [pulse / ITP] is set to the axis control circuit 2.
6 will be output. The axis control circuit 26 converts this pulse into an axis movement command and outputs it to the servo amplifier 27.
The servo amplifier 27 receives the movement command and drives the servo motor 14.

FIG. 2 is a flow chart showing the processing procedure of the movement amount calculation means 21. [S1] The pulse speed is read from the number of rotations of the handle of the manual pulse generator. Here, 100 pulses are read. [S2] The doubled pulse speed (= setting ratio of the manual handle feed amount setting switch × pulse speed output from the handle of the manual pulse generator) is calculated. Here, since the setting magnification of the manual handle feed amount setting switch is set to 100, the doubling pulse speed is 10,000 pulses. [S3] The fast-forward pulse speed is calculated. The rapid traverse pulse speed is obtained by converting the rapid traverse speed into a pulse speed per interpolation cycle. Rapid feed rate is 10,000 [mm / mi
n], the interpolation cycle is 8 [msec], and the coordinate grid interval is 0.
If 001 [mm] (10000 × 8 × 10 ⁻³ ) /
It is calculated as (60 × 0.001) = 1333 [pulse / ITP]. [S4] The clamp pulse speed is calculated by converting the fast-forward pulse speed into an integral multiple of the multiplication switch magnification. This is calculated in the form of (rapid feed pulse speed / multiplication switch setting magnification) × multiplication switch setting magnification. Rapid traverse pulse speed is 1333 [pulse / ITP],
Since the setting ratio of the doubling switch is 100 times, first set (fast-forward pulse speed / setting ratio of the doubling switch) to 1
Divide 333 by 100 and round down the decimal point of the answer at this point. Therefore, it becomes 13. Next, the setting value 100 of the manual handle feed amount setting switch is multiplied by 13.
Therefore, the clamp pulse speed is an integral multiple of the setting magnification of the manual handle feed amount setting switch, which is 1300 in this case. [S5] If the doubled pulse speed is higher than the clamp pulse speed, proceed to step 7, and if it is smaller or equal, proceed to step 6. Here the doubling pulse rate is 1000
When the clamp pulse speed is 0 and the clamp pulse speed is 1300, the process proceeds to step 7. [S6] The doubled pulse speed is output to the axis control circuit. [S7] The clamp pulse speed is output to the axis control circuit.
Therefore, the clamp pulse speed of 1300 pulses is output to the axis control circuit.

FIG. 3 is a hardware block diagram of a numerical controller (CNC) to which the present invention is applied. The processor (CPU) 20 controls the basic functions of the numerical controller. A read-only storage device (ROM) 22 stores a system control program. The random access memory (RAM) 23 stores temporary data such as input / output signals. The non-volatile memory 24 stores various data such as a machining program that should be retained even after the power is turned off. In the panel 25, a graphic control circuit 25a, a display device 25b, a keyboard 25c, a software key 2
5d is provided. The graphic control circuit 25a converts the image information sent from the CPU 20 into a displayable signal and outputs it to the display device 25b. The display device 25b is C
RTs, liquid crystal displays, etc. are used. Keyboard 2
5c is provided with operation keys used for data input, function keys, and the like. The meaning of the software key 25d changes according to the operator's screen selection, and necessary keys are displayed on the screen. On the machine operation panel 13 in the machine tool 10, a manual handle feed amount setting switch 1
1. A manual pulse generator 12 is provided. The manual handle feed amount setting switch 11 sets the magnification of the pulse feed amount. The manual pulse generator 12 generates a pulse speed by rotating a handle installed therein. The axis control circuit 26 receives an instruction such as an interpolation pulse from the CPU 20 and outputs an axis movement instruction to the servo amplifier 27. The servo amplifier 27 receives the movement command and drives the servo motor 14 in the machine tool 10. A programmable machine controller (PMC) 28 controls the machine tool 10 with a sequence program formed in a ladder format.
These components are connected to each other by a bus 29.

[0011]

As described above, in the present invention, the double pulse speed from the manual pulse generator is clamped at the fast-forward pulse speed converted into an integral multiple of the double switch magnification. Therefore, it is easy for the operator to grasp the position of the cutting tool, and the work such as positioning using the manual pulse generator can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of the present invention.

FIG. 2 is a flowchart showing a processing procedure of a movement amount calculation means.

FIG. 3 is a block diagram of hardware of a numerical controller (CNC) to which the present invention is applied.

[Explanation of symbols]

 11 Manual pulse generator 12 Manual handle feed amount setting switch 21 Moving amount calculation means 26 Axis control circuit 27 Servo amplifier 14 Servo motor

Claims (2)

[Claims] 1. A numerical controller having a manual pulse generator that outputs a pulse speed according to the number of revolutions, wherein the pulse speed is increased as a doubling pulse speed according to a magnification from a doubling switch, and the doubling pulse speed is a predetermined pulse. A numerical control device comprising: a movement amount calculating means for converting the predetermined pulse speed into an integral multiple of a multiplication factor of a doubling switch when the speed is exceeded, and using the predetermined pulse speed as a clamp pulse speed. 2. The numerical controller according to claim 1, wherein the predetermined pulse speed is a fast-forward pulse speed.