JPS59713A - Short cut positioning circuit of selecting point - Google Patents

Abstract

PURPOSE:To turn an object to be controlled to a commanded position with short cut, by driving the object to be controlled at a relay group having three contacts and a circuit selecting right or left turning with the turning command. CONSTITUTION:A drive circuit 2, a stop circuit 3 and right and left turning selecting circuits 4, 5 are operated interlockingly mutually with a relay group and relays CR1-5 operated with 6 command contacts (not shown). The relay group each has three contacts RY1A-C,...RY6A-C, and connected to 6 contacts k1-6...m1-6 of rotary switches RT1-3. When a command is given from the 1st position (shown in Figure) to the 5th position, the contacts RY5A-C are closed and the RY1A-C are opened, the relay CR3 is opened and the CR5 is closed. The relay CR5 is excited via contacts V3, m5 and the contact RY5C, the contact CR5K is closed to excite the relay CR2 and the contact 2R2A is closed and self-held to drive left the object. Thus, the short cut is selected automatically with sector type contacts V3, V4 as shown in the previous example.

Description

[Detailed description of the invention] The present invention relates to a shortcut positioning circuit for selected points.

There are cases where a desired position is set in a machine tool, etc., and a target object is automatically positioned at the set position. Particularly in turntable positioning mechanisms, spindle rotation speed conversion mechanisms, turret heads, tool magazines, etc., when turning from the current position to a newly set position, either clockwise ((W) rotation or counterclockwise (CCW) ) around (
・Try to reach the target position by turning to one side or the other.

Therefore, under bad conditions, it may take almost one revolution to reach the target position, which has the drawback of requiring a lot of preparation time.

By the way, in order to position as efficiently as possible, you should not be restricted to rotation in one direction (or be able to rotate in the shortest direction), so that CW rotation is better (or CCW rotation is better). It is desirable to automatically perform efficient positioning by determining the position of This device uses a diode as a circuit element, operates only with a DC circuit, and has a complicated circuit configuration.Therefore, this invention provides a shortcut to the selection point that does not have these drawbacks. It is intended to provide a positioning circuit, can be used with either alternating current or direct current, and is designed to reduce the number of parts, simplify the circuit configuration, and further improve reliability.

This invention will be explained below.

The present invention relates to a short-circuit positioning circuit for a jf selection point, which operates in response to rotation commands of a controlled object to each control position j-, and includes a group of switching means each having first to third contacts. A command unit consisting of a CW direction rotation circuit with a self-hold function and a drive circuit for rotating the controlled object in the CW direction or CCW direction; a first rotary switch having a first set of contacts for each control position; and a first switching means connected to the first set of contacts via each first contact of the group of switching means; a second rotary switch having a corresponding second contact group and a fan-shaped first contact that contacts a predetermined number of the second contact group; a CW direction discrimination circuit comprising: a second switching means connected via a second contact; a third contact group corresponding to each control position; and a predetermined number of the third contact group. A C-series comprising a third rotary switch having a fan-shaped third contact that contacts the third rotary switch, and a third switching means connected to the third contact group through each third contact of the switching means group. A W direction discrimination circuit, the contacts of the second switching means form a CW direction rotation circuit, the contacts of the third switching means form a C (, W direction rotation circuit, and the second switching means Connect the contacts to the CW direction rotation circuit and C(,'W direction rotation circuit, and connect the first
-4- The third rotary switch is interlocked so that the controlled object can be rotated to the command position in a short distance in response to a rotation command from the command section.

Figure 1 (A) and (B)! This is an embodiment of the present invention, in which the number of control positions is 6 and a relay is used as a switching means.The command section 1 shown in FIG. Contact INI~
Command relays H and Yl each connected in series to IN6
-RY6, and each series circuit is connected in parallel to the power supply P-N. And contact INI
-IN6 are closed by a command signal from a numerical controller or the like or by manual operation, and command relays R, y
i to RY6 each have three a contacts RYIA, RY
IB, RYIC,) (, Y6A.

It has RY6B and RY6C.

On the other hand, FIG. 1(B) shows the drive circuit 2 of the present invention. A stop circuit 3, a CW direction discrimination circuit 4, and a W direction discrimination circuit 5 are shown, and the drive circuit 2 includes relays CR1 and C (relays CD and 2 for W direction rotation)
The stop circuit 3 is a drive motor stop relay ci<, 3, CW
The direction discrimination circuit 4 is a CW direction selection relay C 4C (,'w
Direction discrimination times M 5 &! C (W direction selection I) L/
-CR, 5, respectively.

The drive circuit 2 is an overrelay OL 1 connected to a power supply P.
and a relay CR in series with this overrelay OLI.
, 3 are connected to the b contacts CR3K. Then, the CW direction rotation ring-C is connected to the contact CR3 and the power supply NK.
Between R and 1, there are B contacts CR and 2B of C (W direction rotation relay CR and 2) and A contact CR4K of Sv-CR4.
and a parallel circuit with a contact CRIA of CR, 1 for CW direction rotation are connected, thereby forming a circuit for CW direction rotation, and contact CB, 3 is connected to the power supply N. , and between relay CR2 for rotation in the w direction.
-CTLI b contact CRI B and L/ -CR,
5's a contact CR5K and relay CR2's a contact CB・2
A parallel circuit with a person is connected, and by kneading C(W
It forms a circuit for direction rotation.

The stop circuit 3 has contacts 1 to 1 corresponding to control positions #1 to #6.
It has a rotary switch R1-1 equipped with 6 at 6, and the a-contact J and RYIA-Y6A of command relays RY1-RY6 are connected to the contacts 1-6, respectively, and the common point of these relay contacts YIA-RY6A is relay between and to power supply
CR3 is connected. Further, the rotary switch 1 has a contactor (1), which electrically connects the power source P and the contacts 1 to 6.

The CW direction discrimination circuit 4 has a rotary switch RT2 having a fan-shaped contactor 2, and this rotary switch RT
2 has contacts 11 to 16 corresponding to control positions #1 to #6, and these contacts 11 to 16 have command relays RYI to
A contacts R, YIB, and RY6B of RY6 are connected to each other. And these contacts RYIB to RY6B
A relay C1 (, 4 is connected between the common point of the rotary switch R'l'2 and the power supply N.
The shape 2 is in contact with contacts 1, A2, /3 located in the CW direction selection range from the current position #1.

The CW direction selection range has a configuration similar to that of the CW direction discrimination circuit 4 in which the number of control positions is n, and the rotary switch I ('1'3 fan-shaped contact V3 is the contact m4
- m6, and the contacts m1 to m6 are connected to the relay CB via the command commands v -RYI -RY6 (1) a-contacts RYIC and RY6C, respectively. Contactor ■3 is in contact with contacts m4 to m6 of rotary switch l(]'3 in the C(W direction selection range). Switch RTI, RT2, Rr3
are designed to be rotated in conjunction with each other, so that when contact V1 of rotary switch l (, TI) is connected to contact 3, for example, contact V1 of rotary switch RT2 is connected.
2 is in contact with contacts 13 to 15, and is connected to the rotor and the switch R.
Contactor v3 of T3 is contact point m6, ml, m2 K
You will be contacted. Furthermore, drive port 1i! ? The 52 relays CRI and 52 each have a contact point (not shown), and when the relay CRI or CR2 is energized, the drive motor of the controlled object is rotated in the CW direction or the CCW direction. The controlled object and the rotary switches RTI to R'l'3 are associated with each other at control positions #1 to #6.

Explain its operation in such a configuration.

Now, the current position of the controlled object is #1, and the rotor +) switch) j, TI, RT2, Kl'': M) contacts Vl, V2, and V3 are the contacts kl #11 to A, respectively.
3. When the command position #2 is commanded by the command unit 1, the command relay BY2 becomes conductive by closing the contact IN2, and the command relay BY2 becomes conductive. The three a contacts RY2A, R
,Y2B.

RY2C closes. When the command position #2 is commanded, the contact INI corresponding to the previous command position #1 is opened. Therefore, the a contacts RYIA to R of the command relay 11YI
, Y I C are also opened, and relays C) (, 3 of stop circuit 3 become non-conductive. On the other hand, relays CI (4, contact of command relay M2)?, Y 2 B of CW discrimination circuit 3
, contact 12 of rotary switch R1-2. The circuit leading to the power supply via contact v2 is closed, and the current flowing through it selects the CW direction. The CI member is energized, and the relay (upper 4
A contact CB4K closes. As a result, relay CRI of drive circuit 2 is excited, and a contact CJ (
, 1, and A are closed, the relay cn,i is held, and the drive motor is rotated to rotate the controlled object and the rotary switches f(, T1 to R7r3) associated therewith in the CW direction. When the contact v1 of the rotary switch operator 1 reaches the contact point 2 corresponding to the command position #2, the contact Vl.

2 at the contact point. Relay CB, 3 is energized via relay contact RY2A, and b contact CR3K of relay CB, 3 is opened to stop driving the motor. In this way, the controlled object can be rotated in a short distance to the commanded position #2.

Note that relay CR3 continues to be energized until the next command comes, but by keeping it closed until the next command comes, the command reading is completed, and the contacts are fully activated, an unstable region in the rotation direction can be eliminated. It has become.

This can be prevented from immediately opening by using an off-delay timer for relay CI (, 3).

Next, as another example, consider a case where a command position #5 is commanded when the current position is #1.

When the command position #5 is commanded, the contact INS of the command part 1 closes, and the command relay) (Y5 is energized, so that the
A contacts RY5A to RY5C are closed.

Therefore, the a contact of command relay RYI is RYIA ~ 几Y
The IC opens, the motor stop relay CR3 becomes non-conductive, and the b contact C)1.3K of the relay C3 of the drive circuit 2 closes.

On the other hand, relay C) of CW discrimination circuit 4? 4, since the contact 2 of the rotary switch RT2 is not in contact with the contact 15, the relay CR4 is not conductive and its a contact CR4 remains open. However, c(relay CR of W discrimination circuit 5
5, contact V3 of rotary switch RT3 is contact m5
Since it is in contact with
C,! The circuit leading to the power supply via J L/-CR5 is closed, and the flowing current connects C (5/direction selection relay C
R5 is excited and its a contact CR, 5K is closed.

As a result, the relay C2 of the drive circuit 2 is energized, and its a contact CR2A is closed, thereby holding the relay CR2 and rotating the drive motor in the C (, W direction. Rotary switch that is an object and its association; RTI, RT2, T
Vr3 Car' (h sled, C (rotated in the W direction).

Then, when the contact V1 of the rotary switch RI''l reaches the contact point corresponding to the command position #5, the contact V1
, contact 5, relay contact R: relay (via Y5A)
? R3 is energized and the b contacts (, 'R3K are opened to stop the motor. In this way, the controlled object can be rotated in a short distance to the command position #5.

In addition, although the case where the current position is designated as #1 and #2 and #5 are specified as commanded positions has been described above, other commanded positions are similarly rotated in a short distance.

As described above, according to the selection point shortcut positioning circuit of the present invention, positioning can be obtained by automatically selecting a shortcut direction with respect to the command position, so that index positioning can be shortened. . Furthermore, since the structure is simple, the number of parts can be reduced, and a low-cost product with fewer failures can be obtained. Furthermore, by changing the shape (opening degree) of the fan-shaped contact, there is an advantage that the shortcut range can be changed freely.

In addition, although the above example shows an example of a 1-way configuration using relays,
A switching means such as an analog switch can be used to make the switch non-contact, and a reed switch can be used instead of a rotary switch to make the switch non-contact. Furthermore, although the number of control positions is six in the above description, the number of control positions can be arbitrarily varied. Additionally, K, as shown in Figure 2, C(
The W direction discrimination circuit is deleted, and the B contact CR4B of the relay CR4 of the CW direction width i classification circuit 4 is used to determine the C(,'
It is also possible to configure a circuit for rotation in the W direction.

[Brief explanation of drawings]

FIGS. 1A and 1B are wiring diagrams showing one embodiment of the present invention, and FIG. 2 is a wiring diagram showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Command part, 2... Drive circuit, 3... Stop circuit, 4... CW direction discrimination circuit, 5... CCW direction discrimination circuit, RY 1~)j, Y 6... Command relay, C)
? , 1 to CR4...Relay.

Claims (1)

[Scope of Claims] a) a command unit that operates in response to rotation commands to each control position of the initial control object and that includes a group of switching means each having first to third contacts, and b) a self-hold function. It consists of a CW direction rotation circuit and a CCW direction rotation circuit having
a drive circuit for rotating the controlled object in the CW direction or the C (W direction); C) a first rotary switch having a first contact group corresponding to each control position; and the first contact group. d) a stop circuit comprising a first switching means connected via each first contact of the switching means group; d) a second contact group corresponding to each of the control positions; a second rotary switch having a fan-shaped first contact that contacts a predetermined number of contacts in the group; and a second switching device connected to the second contact group via each second contact of the switching means group. e) a third contact group corresponding to each of the control positions, and a fan-shaped third contact that contacts a predetermined number of the third contact group; C(y
a J-direction discrimination circuit;
A W force direction diversion circuit is formed, the contacts of the third switching means form the C (W direction rotation circuit), and the contacts of the first switching means are connected to the CW direction rotation circuit and the C (W direction rotation circuit). In addition to being connected to the rotation circuit, the first
- A short-circuit positioning circuit for a selection point, characterized in that a third rotary switch is interlocked so that the controlled object can be rotated to a commanded position in a short-circuit manner in response to a rotation command from the command section.