KR100193723B1 - Motor speed control device and method - Google Patents

Abstract

The present invention relates to a cash register, and more particularly, to provide a central processing unit (hereinafter referred to as a CPU) 100 for controlling the overall operation of the cash register, and various control programs and initial data to the CPU 100. A ROM 140, which is a memory device that stores information such as a unit price for each item for sales activity, information such as a sale amount generated in a sales activity, and the like, and drives a motor. Motor drive circuit 180, a motor 170 driven by control of the motor drive circuit 180, and a keyboard 130 for inputting data and commands necessary for driving the motor 170. By selecting the spool motor on time, the power of the motor is reduced when the printed paper is bent due to a defect caused by a paper size change, that is, the paper is wound tightly. To change the section called constant point in time and do not change the paper width detection key has the effect of eliminating the problem you need to change the circuit.

Description

Motor speed control device and method

The present invention relates to a cash register, and more particularly, to a spool motor speed of a cash register for winding the conveyed paper well by controlling the speed of a spool motor winding the printed paper in a small printer of the cash register. (Spool Motor Speed) Control method and apparatus.

Generally, a cash register is installed in a narrow space in public places and places where cash is handled for sales calculation or tax calculation, such as in a department store or a convenience store.

Such a cash register is provided with various functions for managing the amount calculation or the sale. Learn more about the configuration and operation of such a cash register.

1 is a circuit block diagram showing the operation of a cash register generally in use.

As shown, a central processing unit (hereinafter referred to as CPU) 100 for controlling the overall operation of the cash register, and a ROM (ROM) 140 for providing various control programs and initial data to the CPU 100. And RAM 150, which is a memory device that stores information such as a unit price for each item for sales activity, information such as a sale amount generated in sales activity, and various types of information generated from a cash register in the form of letters. A display unit 110 for displaying, a printer 120 for issuing a receipt for sales details, a clock chip 160 for recognizing a sold time and date by checking a time, or for managing point of sale; The keyboard 130 is provided with a plurality of keys for inputting various commands and data.

Referring to the operation according to the configuration as follows.

First, the electronic cash register user inputs data according to the purchase item details through the keyboard 130. The keyboard 130 that receives data according to the purchased item details is applied to the CPU 100. The CPU 100, which has received data according to the purchased item details, reads a control program necessary for processing the purchased item details from the ROM 140.

The control program read from the ROM 140 is temporarily stored in the RAM 150, which is a memory device, and read and executed by the CPU 100 as necessary. The RAM 150, which is a memory device, temporarily stores information such as a unit price for each item for sale, information such as a sale amount generated in the sale, and the like.

As such, the print data processed by the CPU 100, that is, the receipt for the sales history, is printed by performing a print job through the printer 120.

In addition, various types of data such as purchase item details processed and output from the CPU 100 are processed by the display unit 110 and displayed in the form of characters. At this time, the clock chip (RTC) 160 checks the time when goods are sold so as to recognize the sold time and date or to manage the selling time of all goods.

A printer for outputting data on sales details in a conventional cash register operating in the above configuration employs a method of winding a printed sheet using a DC motor.

Therefore, the circuit time constant of the drive part may be different depending on which paper size is used. Therefore, when designing and producing the spool motor drive part, the paper time is different according to each user. By adjusting the spool motor on time, it is difficult for the user to manage the specifications, and it is not possible to change the spool motor on time in a timely manner. there is a problem.

2 is a circuit diagram illustrating a control method according to a spool motor speed in the related art.

As shown in the drawing, a device which winds a sheet of paper by the power of a motor under the control of a CPU by applying a + 24V voltage is shown.

For example, if the spool motor on time is 12ms with the same resistance R1 when the paper width is 57 m / m, the spool motor with the same resistance R1 when the paper width is 76 m / m Change the Spool Motor On Time to 24ms.

When the paper is completely rolled up, there is a problem in that the bending of the printing occurs when the power of the motor is insufficient or the detection is too large.

Therefore, in order to solve the above-described problem, the present invention directly selects the spool motor on time, so that there is no circuit change during product design or user use management. The purpose is to solve the problem.

1 is an internal circuit block diagram showing the operation of a cash register in general use.

2 is a circuit diagram illustrating a conventional control method using a spool motor speed.

3 is an internal circuit block diagram illustrating an operation of a cash register to which the present invention is applied.

4 shows a flowchart in accordance with the present invention.

Explanation of symbols on major symbols in the drawings

100: CPU (central processing unit) 130: keyboard

140: ROM 150: RAM

170: Motor 180: Motor Drive Circuit (MOTOR DRIVE CIRCUIT)

3 shows a circuit diagram to which the present invention is applied.

As shown, a central processing unit (hereinafter referred to as CPU) 100 for controlling the overall operation of the cash register, and a ROM (ROM) 140 for providing various control programs and initial data to the CPU 100. And a RAM (150), which is a memory device that stores information such as a unit price for each item for sales activities, information such as a sale amount generated in sales activities, a motor drive circuit 180 for driving a motor, and And a motor 170 driven by the control of the motor drive circuit 180, and a keyboard 130 for inputting data and commands necessary for driving the motor 170. Referring to the operation of the present invention configured as described above are as follows.

First, the electronic cash register user inputs data for driving the cash register through the keyboard 130. Data for driving the cash register is applied to the CPU 100 through the keyboard 130. The CPU 100, which has received data for driving the cash register, reads a control program necessary for driving the cash register from the ROM 140.

The control program read from the ROM 140 is temporarily stored in the RAM 150, which is a memory device, and read and executed by the CPU 100 as necessary. The RAM 150 as a memory device temporarily stores data or information for driving a cash register.

As described above, the RAM 150 as a memory device is supplied with data or information for driving a cash register to the motor control circuit under the control of the CPU to drive the motor.

4 shows in a flowchart a method for controlling the speed of a spool motor.

As shown, the spool in the step S10 of starting the method for controlling the speed of the spool motor and the method of controlling the speed of the spool motor in the step S10. When the method for controlling the speed of the spool motor is executed, the spool motor speed control key (Spool) is sold in the program mode if the article is sold in step S11 of selling the article and the selling of the article in step S11. In step S12 of checking whether the Motor Speed Control Key is input, and in step S12 of checking whether the Spool Motor Speed Control Key is input, the Spool Motor Speed Control Key If no) is entered, returning to the step of selling goods (S11), and if the spool motor speed control key is input, the desired step. In step S13 and inputting the desired step, in step S13, if the desired step is input, storing the data in the RAM S14 and storing the data in the RAM If the data is stored in the RAM in the storage step S14, the CPU reads the data stored in the RAM to control the speed of the spool motor (S15), and The CPU reads the data stored in the RAM and controls the speed of the spool motor. In step S15, the CPU reads the data stored in the RAM and adjusts the speed of the spool motor. If control is performed (Spool Motor Speed Control), the process is terminated (S16).

The method composed of such steps is as follows.

First, in order to control the speed of the spool motor, the user first sets the spool motor on time of several steps in the program.

For example, step 1 On Time: 20 ms,

2nd stage On Time: 30 ms,

3-step On Time: 40 ms,

Step 4 On Time: When 50 ms is set (where On Time and each step can be changed according to the user's usage situation), when the power is turned on by the user, the CPU After reset by the control of, the program starts from any one of the steps set in the initial program.

As such, if starting from one step, for example step 2, the user enters an arbitrary key in the program mode if the user notices that the paper roll of the spool motor is counted or is not well detected during the registration mode. After inputting the On Time of each step, the CPU stores the data in RAM, that is, the On Time of each step in RAM, and the On Time of each step. When Time is stored in RAM, the Spool Motor Speed Control is controlled by reading data stored in RAM under the control of the CPU.

The effect of the present invention made up of the above configuration and method is that the user directly selects the spool motor on time (Spool Motor On Time), the defect caused by the change in paper size, that is, the hard-wound printed letters and the printed paper When it is wound to Full, it is effective to solve the problem of not detecting the lack of power of the motor and changing the circuit to change the partial time constant when changing the paper width.

Claims (3)

A central processing unit (hereinafter referred to as CPU) 100 that controls the overall operation of the cash register, a ROM 140 which provides various control programs and initial data to the CPU 100, and sales activities. RAM 150, which is a memory device that stores information such as a unit price for each item, and information such as a sale amount generated in a sales activity, a motor drive circuit 180 for driving a motor, and the motor drive circuit. A spool motor of a cash register comprising a motor 170 driven by the control of 180 and a keyboard 130 for inputting data and commands necessary for the motor 170 to drive. Device for controlling the speed of In step S10 of starting a method for controlling the speed of a spool motor, and in step S10 of starting a method for controlling the speed of the spool motor, a spool motor. When the method for controlling the speed of the product is executed, selling the article (S11), and if selling the article at the selling step (S11), the spool motor speed control key (Spool Motor Speed Control Key) in the program mode. In step S12 of checking whether or not the input is made, inputting a desired step (S13) when the spool motor speed control key is input, and inputting the desired step (S13), If the desired step is entered, the CPU stores the data in the RAM in step S14 and the data in the RAM in step S14. RAM) Reading data and controlling the speed of the spool motor (S15), and the CPU reading the data stored in the RAM to control the speed of the spool motor (Spool Motor Speed Control). In step S15, if the CPU reads the data stored in the RAM and controls the speed of the spool motor (Spool Motor Speed Control), the process ends (S16). Is a method for controlling the speed of a spool motor of a cash register. According to claim 2, If the Spool Motor Speed Control Key (Spool Motor Speed Control Key) In step (S12) If the Spool Motor Speed Control Key (Spool Motor Speed Control Key) If the input is not for selling the article Returning to step S11, further comprising the step of controlling the speed of the spool motor of the cash register.