JPH05261192A - Control device of industrial sewing machine - Google Patents

Abstract

PURPOSE:To easily determine the maximum rotational speed by providing a control device adapted to input a preset value of the maximum rotational frequency adjusting volume and add a certain constant to a preset value input by setting a maximum rotational frequency changeover switch to determine the value of the maximum rotational speed when a front foot switch is turned on. CONSTITUTION:When a sewen product manufacturing worker turns on a front foot switch 10, a control device 8 inputs a preset speed from the maximum rotational speed adjusting volume and controls the speed in such a manner that the rotational speed of a sewing machine is equal to the preset value by encoder panel processing. A certain constant is added or not added to the preset value of the maximum rotational speed adjusting volume 11 by setting the maximum rotational speed changeover switch 10 to set the maximum rotational speed adjusting range in two stages. Accordingly, it is possible to solve the problems that a new control device is prepared according to the kind of a sewing machine and the maximum rotational speed is increased by the maximum rotational speed adjusting volume to exceed the allowable rotational speed of the sewing machine which causes a failure of the sewing machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an industrial sewing machine, and more particularly to a setting value of a maximum rotation speed changeover switch and a maximum rotation speed adjustment for speed control after turning on a front foot switch. The present invention relates to a control device for an industrial sewing machine, which determines the maximum rotation speed of the industrial sewing machine according to a set value of a volume.

[0002]

2. Description of the Related Art Conventionally, as a control device for an industrial sewing machine, the maximum rotation speed of the industrial sewing machine is previously determined in the control device, and the maximum rotation speed adjusting volume is set according to the industrial sewing machine to be used. The one that is adjusted by is generally adopted.

[0003]

However, in this type of control device, in general, the range below the maximum rotation speed determined in advance in the control device depends on the value of the maximum rotation speed adjusting volume. The maximum rotation speed of the industrial sewing machine is set.

However, in the prior art, when the permissible rotation speed is 5000 r / min, such as a lockstitch sewing machine, if the maximum rotation speed is previously determined to be 5000 r / min in the control device, the maximum rotation speed will be determined. 5 by adjusting volume
It can be set within the range of up to 000r / min.
However, the allowable rotation speed is 9000r /
When it is min, a new control device will be prepared.

Further, when the control device with a maximum rotation speed of 9000 r / min is used in a sewing machine with an allowable rotation speed of 5000 r / min, the adjustment range of the maximum rotation speed adjusting volume is halved, and further, There is a problem that the maximum rotation speed easily rises depending on the position of the volume and exceeds the permissible rotation speed of the industrial sewing machine, which may cause the sewing machine to malfunction.

An object of the present invention is to set the maximum rotation speed of an industrial sewing machine according to the set value of the maximum rotation speed changeover switch and the set value of the maximum rotation speed adjustment volume in speed control after turning on the front foot switch. An object of the present invention is to provide a control device for an industrial sewing machine that can make a decision.

[0007]

The object is to provide a sewing machine main body, a motor for driving the sewing machine main body, and pulse generating means for outputting a pulse signal proportional to the rotation speed of the motor.
A means for measuring the rotation of the motor by the number of pulses from the pulse generating means, a needle position detecting means for detecting a predetermined position of the sewing machine needle and generating a needle position signal, and a drive command signal output at a specified position of the pedal. Front switch,
Industrial having a position control device for driving the motor and controlling the fixed position of the sewing machine needle by a signal from the front step switch, a maximum rotation speed adjusting volume for setting the maximum rotation speed of the sewing machine, and a maximum rotation speed changeover switch In the control device of the sewing machine for sewing machine, the control device controls the speed of the industrial sewing machine to And a means for determining the number of rotations.

[0008]

According to the present invention having the above construction, when the front foot switch is turned on, the control device inputs the set value of the maximum rotation speed adjusting volume and sets the maximum rotation speed changeover switch. The maximum rotation speed is determined by adding a constant to the set value input by, so if the speed is controlled to reach that value, the maximum rotation speed can be set in two stages by setting the changeover switch. Because you can
It is possible to easily handle both high-speed sewing machines and low-speed sewing machines.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are a front view and a right side view of an industrial sewing machine according to the present invention. In the figure, a motor 2 is arranged below the sewing machine body 1, and an encoder 3 is directly connected to the motor 2. The motor shaft pulley 4 is fixed to the output shaft of the motor 2, and the sewing machine shaft pulley 5 is fixed to the sewing machine shaft of the sewing machine body 1.
The belt 7 is wound around the sewing machine shaft pulley 5 and the sewing machine shaft pulley 5. Further, the sewing machine shaft pulley 5 is provided with a needle position detector 6 for detecting the upper or lower position of the sewing machine needle, and these position signals and signals from the pedal 9 are input to a control circuit 8 including a microcomputer. ing.

A control block diagram of such an industrial sewing machine is shown in FIG. In the figure, when the sewing manufacturer turns on the front foot switch 10, the control device 8 reads the set speed from the maximum rotation speed adjusting potentiometer and performs speed control so that the sewing machine rotation speed becomes equal to the set value by encoder pulse processing. It is something to do.

Here, the maximum speed adjusting volume 11
The maximum rotation speed adjustment range can be set in two stages by adding or not adding a certain constant to the setting value of 1, depending on the setting of the maximum rotation speed changeover switch 10.

That is, for example, if the setting value of the maximum rotation speed adjusting potentiometer 11 is converted from 0 to 5 V into bits, it is 0 to 0.
It can be expressed by 255 bits.

In the normal case, this value is multiplied by 20 to 0-5100 r / min, and the speed is controlled by setting this value as the sewing machine rotation speed setting value. When the switch is on, the set value of the sewing machine rotation speed can be easily determined to be 0 to 9180 r / min by multiplying by 36.

Further, in the present invention, for the position control of the above-mentioned sewing machine, if a one-chip microcomputer generally used in recent years is used, the cost of this type of control device can be greatly reduced.

[0016]

As described above, according to the present invention, in the speed control after turning on the front foot switch, the maximum rotation speed of the industrial sewing machine is set by the setting value of the maximum rotation speed changeover switch and the setting value of the maximum rotation speed adjusting volume. The number can be easily determined.As a result, as in the past, a new control device is prepared according to the type of sewing machine, and the maximum rotation speed is increased by increasing the maximum rotation speed. It is possible to solve the problem that the permissible rotation speed of the sewing machine for the sewing machine is exceeded and the sewing machine fails.

[Brief description of drawings]

FIG. 1 is a front view of an industrial sewing machine control device according to the present invention.

FIG. 2 is a right side view of the industrial sewing machine control device shown in FIG.

3 is a block diagram of the industrial sewing machine controller shown in FIG. 1. FIG.

[Explanation of symbols]

1 ... Sewing machine main body, 2 ... Motor, 3 ... Encoder, 4 ...
Motor shaft pulley, 5 ... Sewing machine pulley, 6 ... Needle position detector, 7 ... Belt, 8 ... Control circuit, 9 ... Front step switch,
10 ... Maximum rotation speed selector switch, 11 ... Maximum rotation speed adjustment volume.

Claims (1)

[Claims] 1. A sewing machine main body, a motor for driving the sewing machine main body, pulse generating means for outputting a pulse signal proportional to the rotational speed of the motor, and means for measuring the rotation of the motor by the number of pulses from the pulse generating means. , A needle position detecting means for detecting a predetermined position of the sewing machine needle and generating a needle position signal, a front step switch for outputting a drive command signal at a specified position of the pedal, and a motor drive by a signal of the front step switch, And a position control device for performing fixed position stop control of the sewing machine needle, and a control device for an industrial sewing machine having a maximum rotation speed adjusting volume for setting the maximum rotation speed of the sewing machine and a maximum rotation speed changeover switch, wherein: Is the setting value of the maximum rotation speed changeover switch and the maximum rotation speed adjustment potentiometer in the speed control after turning on the front foot switch. Depending on the set value, the control device of the industrial sewing machines, characterized in that it comprises means for determining the maximum speed of the industrial sewing machines.