JPS6041840Y2 - Pulse sending circuit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pulse sending circuit for driving a pulse motor driver in an NC device, a robot, etc.

In order to drive a pulse motor driver, it is necessary to send interpolated pulses from a function generation circuit or the like to the pulse motor driver to generate pulses for excitation of the pulse motor.

In addition, the pulse motor driver has a pulse train and forward/normal rotation.
A reverse signal must be input.

For this purpose, there are two methods: a method of sending out a forward rotation pulse and a reverse rotation pulse separately, and a method of sending out a forward/reverse rotation command signal and a pulse train.

Traditionally, the above two methods have been used appropriately, but
In order to use both methods in one device, switching had to be performed using separate pulse delivery circuits.

Therefore, when one circuit is used, the other circuit is not used, and problems such as an increase in the number of parts have also arisen.

The present invention solves the above-mentioned problems and makes it possible to easily switch the pulse sending method. By sharing a part of the circuit used for both methods, the present invention creates a simple pulse sending circuit with a small number of parts. The purpose is to obtain.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a pulse sending circuit according to the present invention.

A forward rotation pulse and a reverse rotation pulse are generated from the pulse generation circuit 10, and are inputted to an open collector inverter 13.14 via an inverter 11.12, respectively.

The open collector inverters 13 and 14 output forward rotation pulses and reverse rotation pulses, respectively.

These forward rotation pulses and reverse rotation pulses are input to a pulse motor driver to generate an excitation pulse for forward rotation or reverse rotation.

In this case, for forward rotation and reverse rotation, the forward rotation pulse and reverse rotation pulse generated by the pulse generation circuit 10 are sent out separately.

The output of the pulse generation circuit 10 is also input to the RS flip-flop circuit 15.

This RS flip-flop circuit 15 stabilizes at a constant level when a forward rotation pulse and a reverse rotation pulse are inputted, respectively, and can obtain a constant output.

Since the output level is inverted, a forward or reverse rotation switching signal is outputted via the inverter 16.

When a forward rotation or reverse rotation switching signal is obtained using the RS flip-flop 15, the pulse motor driver can be driven if only a pulse train is provided.

That is, there is no need to distinguish between forward rotation pulses and reverse rotation pulses, and it is sufficient to provide only the pulse train.

Therefore, terminals 17 and 18 are provided so that the output ends of inverter 13 and inverter 14 can be connected.

By connecting these two terminals with a jumper wire, an OR circuit of forward rotation pulses and reverse rotation pulses is constructed, and a pulse train is output.

FIG. 2 shows the pulse waveform and timing in the pulse sending circuit according to the present invention shown in FIG.

The normal rotation pulse obtained by the pulse generating circuit 10 is as shown in FIG. 2A.

In this case, the output signal, ie, the normal rotation pulse, appears at the L level.

Similarly, the reverse pulse obtained by the pulse generating circuit 10 is as shown in FIG. 2B.

A forward rotation pulse or a reverse rotation pulse is output from the open collector inverter 13 or the open collector inverter 14, and each is input to the pulse motor driver.

In this case, terminal 17 and terminal 18 are not connected.

When the terminals 17 and 18 are connected, an OR circuit of the outputs of the open collector inverters 13 and 14 is formed, so the output in this case becomes a pulse train as shown in FIG. 2C.

This pulse train is input to the pulse motor driver through one transmission line.

Since forward rotation/reverse rotation cannot be determined in the pulse motor driver even if only a pulse train is input, it is necessary to input a forward rotation/reverse rotation switching signal.

This switching signal uses the output of the RS flip-flop 15.

That is, when a normal rotation pulse is input, the output is stabilized at H level, and the inverter 16 obtains an L level normal rotation signal.

Conversely, when a reverse pulse is input, it stabilizes at L level, and the output of inverter 16 becomes H level.

This is shown in the waveform as shown in the second diagram.

The output of the inverter 16, which is the forward/reverse rotation switching signal, and the output of the pulse train are input to a pulse motor driver to obtain an excitation pulse for driving.

As is clear from the above description, in the pulse sending circuit according to the present invention, the outputs of the open collector inverter 13 and the open collector inverter 14 are transmitted as they are to the pulse motor driver, and the output of the inverter 16 is passed through the RS flip-flop 15. It has a structure in which the output of the OR circuit formed by connecting the terminals 17 and 18 is transmitted to the pulse motor driver.

Switching can be easily accomplished by using jumper wires.

According to the present invention, not only it becomes easy to arbitrarily switch the signals transmitted to the pulse motor driver, but also the number of parts for this can be reduced by sharing some of them.

Further, there is no need for a complicated mechanism for changing the method, and the method can be changed in a short time if necessary.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is an output waveform diagram. 10... Pulse generation circuit, 13, 14...
...Open collector inverter circuit, 15...
・RSS flip Flora circuit, 16... Inverter circuit.

Claims (2)

[Scope of utility model registration request] (1) In a pulse generation circuit that sends forward rotation/reverse rotation pulses generated by the pulse generation circuit to the pulse motor driver, a flip-flop circuit that receives the forward rotation/reverse rotation pulses from the pulse generation circuit and the output of the flip-flop circuit a first output circuit that generates a forward/reverse rotation switching signal;
comprising second and third output circuits that receive forward rotation and reverse rotation pulses and separately generate forward rotation pulses and reverse rotation pulses; A pulse sending circuit characterized in that the second and third output circuits are provided with terminals so that the output ends of the output circuits can be short-circuited. (2) The second and third output circuits are configured with open collector inverter circuits, and the second and third output circuits are provided with terminals so that the open collector inverters can be connected. A pulse sending circuit according to claim 1 of the utility model registration claim.