JPS6152707A - Numerical control device - Google Patents

Abstract

PURPOSE:To control a moving part so that the moving part is driven in the direction returning to a prescribed driving range if the moving part exceeds the driving range, by storing the position of a limit switch when the limit switch exceeds a dog and limiting the moving direction of the moving part to a certain direction and within a prescribed moving range. CONSTITUTION:When receiving a signal indicating that the limit switch contacts with the dog, a storage device 6 reads and stores this signal through a numerical control device 1. The numerical control device 1 detects and discriminates whether the limit switch contacts with the dog or has ever contacted with the dog, and the numerical control device 1 stops transmission of a moving command signal to a moving part 2. Consequently, even if the moving part 2 of a driving device exceeds the dog 5 and is stopped, the numerical control device 1 receives the stored signal, which indicates that the limit switch has ever contacted with the dog, from the storage device 6, and the transmission of the moving command signal from the numerical control devide 1 is stopped to control the movement of the moving part 2 in the direction going away from the moving range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an 8-value control device, and more particularly to a value control device d1 having a function of limiting the Vr-movement range to a predetermined IjQ four circle.

[Prior art]

A conventional device of this kind will be explained based on FIGS. 4 to 6. FIG. 4 shows the entire drive device equipped with a numerical ftt control device R, (1) a numerical control device, (2), (3) The movable part 2 and the fixed part of the Z shift device are controlled by the numerical control device (1), and (4) the movement command signal issued by the numerical control device (1) is received. The dog (6) attached to the fixed part (8) is contacted by the drive of this moving part (2), and the contact signal is transmitted to the upper He value ft1lJ. The numerical control device, which receives this contact signal from the limit switch sent to the control device, is configured to send a deceleration stop signal to the movable M (2).

Therefore, the movement of movable 5(2) can be surely stopped.
In the second position, limit switch (4) is used as its stop position.
It is necessary to make the length t of the dog (6) in contact with the dog (6) sufficiently long. The town is built to the length of the Aburan Choba Dog (6)! VI part (2
) is defined, and if the movement is within the 11th circle, the limit switch (4) will surely move to the dog (6).
), and by detecting this contact signal sound, the numerical control device (1) can give a certain direction of movement within the range of +liα to FJjJ Shichimachi Ginbu (2). However, now, if the limit switch (4) turns into a dog (
When the limit switch (4) is not in contact with the pin 6, the limit switch (4) does not send out a contact signal, and therefore the value i1j control device (1) does not control the movement 1ljlr of the movable part (2).

In other words, in the conventional numerical control device (1), the length of the dog (5) does not match the movement range of the movable part (2), or the inertial momentum of the movable part (2)゛ is too large, and the limit switch (4) is closed to the dog (5).
If the engine overruns and stops, the numerical control device (1) will no longer issue a deceleration stop signal based on the contact signal of the limit switch (4), and Ef
It is possible to move the movement range further away based on the drive command signal! The vI section (2) was to be fully driven, which would have cost money for damage to the drive device, and the numerical control device (1) could hardly be said to be sufficient.

[Outline of the invention]

The present invention was made to solve the problems described in the paper.When the limit switch exceeds the dog, the position is memorized and the movable part moves in a constant direction and in a predetermined direction. This paper proposes a numerical control device that limits the range.

[Embodiments of the invention]

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 6. For convenience of explanation, parts that are the same as or equivalent to those in the prior art are given the same reference numerals, and the explanation thereof will be omitted. 1st
In the figure, (6) indicates that the limit switch (4) is in the dog position (
5) Contact signal with? When received, this signal is read and stored through the numerical control device (1). There is an 1itE storage device "'C" which reads and stores this signal.The numerical control device (1) has a built-in circuit as shown in Fig. 2. , Is the limit switch (4) in contact with the dog (5) Ic, or is it in contact with it? Detection 41 KRL , The numerical control device (1) sends a movement command signal to the movable part (2). Therefore, if the movable part (2) of the drive device
Even if the limit switch (4) reaches the dog (5) and stops, the numerical control device (1) still sends a signal indicating that the limit switch (4) may contact the dog (5) and stop. )
The transmission of the movement command signal from the numerical control device fi (1) is stopped, and the movement wJ in the direction away from the movement range of the movable part (2) is completely restricted.

FIG. 3 shows another embodiment of the present invention.

(7c9 is the driving device? It is a sequencer that controls all operations such as lighting the lamp for operation and removing the workpiece 7c9. This sequencer (7) can be installed on the memory circuit, so there is a limit Dog (5) of switch (4)
You can recover contact number 16 and store it in the memory circuit to make yourself feel lonely. Therefore, the limit switch (
4) is dog (5)? It is possible to exceed t1 number 1 rainbow tl
The bdt to ilJ (to) device (1) emits 100 g.
Then, when the limit switch (4) is in contact, the numerical control device (1
) to move IEJ finger 7i=i'1g from r to 1g and move upward to achieve the same effect as in the embodiment.

〔Effect of the invention〕

According to the present invention, the numerical control device can control t'
Even if the movable part of a machine exceeds its driving range, it can be controlled by moving the movable part in the return direction.5
No damage to the machine or 7'C. 1. Dog length? To set the coasting distance at 1 when the machine stops? This also has the effect of eliminating the need for calculations and allowing the design process to be organized into subdivisions.

[Brief explanation of drawings]

Fig. 1 shows a device to which a 111J drum stand is applied, which shows one embodiment of the present invention, Fig. 2 is a circuit diagram of f17' (circuit diagram) built into the numerical control device of Fig. A diagram equivalent to FIG. 1 showing another example, FIG. 4 a diagram equivalent to FIG. 1 showing a conventional device,
#J5 Figure 2 and Figure 6 are the narrow part M Kui Zheng Ming drawings from the previous exhibition 1. (1): Numerical control 11 device (2): Mechanical sliding part (
8): Fixed tail of the machine (4): Limit switch (5
) Two dogs (6): Storage device (7) Two sequencers

Claims (1)

[Claims] connected to a fixed body having a touched part and a movable body having a switch mechanism that transmits a contact signal with the touched part,
A numerical control device that transmits a drive command signal to the movable body, receives the contact signal, and transmits a deceleration stop signal to the movable body to drive and control the movable body within a predetermined range, reads and stores the contact signal. The numerical control device further comprises a storage device that controls the movable body to be restricted within a predetermined range based on the storage signal even after the contact signal is released.