JPS60183997A - Drive controller for stepping motor - Google Patents

Abstract

PURPOSE:To reduce the capacity of a memory of generating respective speed modes by one types of accelerating and decelerating data, thereby largely decreasing the accelerating and decelerating data for suppressing a vibration. CONSTITUTION:Accelerating and decelerating data, and speed mode data are stored in advance in a memory 12, thereby suppressing the vibration when a motor 11 is accelerated or decelerated to prevent a variation in the speed from occurring at the constant speed time and stopping state time. Further, a basic clock pulse (b) varying in the period is supplied from a counter CTR1 to a counter CTR2 in response to the speed mode. The counter CTR2 counts the pulse (b) in response to the data to switch the exciting phase of the motor 11 to supply the pulse signal (d) of varying period for deciding the exciting phase switching timing to a CPU10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stenobing motor drive control device F2 used, for example, in Zolinta.

[Techniques of the Invention: 1. Background and Problems] In general, stepping motors are used for the carriage and movement of serial dot printers and the like. A print head is mounted on the carriage, and as the carriage is moved back and forth by a stepping motor, the print head performs a printing operation.

By the way, when controlling the drive of the stepping motor for driving the carriage, it is necessary to control each speed state of acceleration, constant speed, and deceleration. However, for example, when the stepping motor is accelerated to a constant speed state, vibrations inherent to the stepping motor generally cause a vibration state in which the speed fluctuates for a certain period of time. If a printing operation is performed in this vibrating state, there is a problem that printing quality deteriorates, such as the printing width of characters becoming unstable. If the vehicle reaches a stop state after decelerating, and the vibration state described above occurs, the vehicle will wait until the motion stops at j1□.

Therefore, the start of the next printing operation is delayed, and the printing execution speed is reduced.

In order to solve such problems, conventionally, a method has been used in which the switching period of the excitation phase of the stepping motor during acceleration and deceleration is varied.

Specifically, the switching period of the excitation phase during acceleration is changed from the theoretical period under uniform acceleration conditions, and the acceleration of the stepping motor and pin motor is adjusted so that vibration does not occur when a constant speed condition is reached. control. Furthermore, when transitioning from deceleration to stop, the acceleration of the stepping motor is similarly controlled. However, in a normal printer, there are more than ten speed modes of the stepping motor depending on the dot structure of the characters and the printed contents of reduced and enlarged character sets. Therefore, in the conventional method described above, acceleration and deceleration data for vibration suppression, that is, excitation phase switching cycle data during acceleration and deceleration, are required for each speed mode. The drawback was that the memory capacity was enormous.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to significantly reduce acceleration and deceleration data for vibration suppression, thereby reducing memory capacity, and to reduce speed fluctuations at constant speed and when stopped. An object of the present invention is to provide a stepping motor drive control device that can drive a stepping motor reliably and stably by greatly preventing the occurrence of certain vibrations.

[Summary of the invention]

In the present invention, a memory means is provided for storing in advance predetermined acceleration/deceleration count numerical data corresponding to acceleration and deceleration data of the stepping motor and speed count numerical data corresponding to the speed mode. The control means sets the speed count numerical data according to the speed mode of the stepping motor in the first counting means. The first counting means generates a basic clock signal having a period based on set speed count numerical data. The second counting means has an acceleration/deceleration count number of 11 set by the control means.
6. The basic clock signal is counted according to the data, and a pulse signal having a period corresponding to each drive state of acceleration and deceleration of the stepping motor is generated.

Based on this pulse signal, the generating means generates excitation phase data that determines the driving of the varnish chipping motor, and supplies the generated excitation phase data to the stepping motor driving means.

With such a configuration, it is possible to reliably and stably drive the steering and ping motors by simply storing one type of acceleration, deceleration data, and speed mode data.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing the configuration of an apparatus according to an embodiment. In Figure 1, a microprocessor (hereinafter referred to as CPU)
10 is a stepping motor (hereinafter simply referred to as motor) that controls the operation of the entire printer, for example.
Excitation phase data that determines the drive of 11 is generated.

The memory 12 stores acceleration and deceleration data of the motor 11 and each count value m corresponding to the speed mode.

n1fc is stored in advance.

The programmable counter 13 consists of two independent counters CTRI and CTR29, each counter CTR7.
, CTR2 are each configured to perform a counting operation based on a count value non set by the CPU Z o. Counter CTRI is CP[J
C according to the count value n preset by 10.
The basic clock pulse a supplied from the PU 10 is counted, and the output signal obtained by dividing this pulse B is set as the basic clock pulse b of the counter CTR2.
-1;, do.

The counter CTR2 starts its operation in response to the gate signal C of the CPU Z o, and receives the basic clock pulse b according to the count value m that is reset by the CPU 10.
is counted, a pulse signal d having a predetermined period is generated and supplied to the CPU 10. The motor driver 9/4 generates an excitation rJJ'i current according to the excitation phase data supplied from the CPU10 to drive the motor 1.

In addition to the drive control device configured as described above, -actual Kq
The operation related to the example will be explained. First, when a printer print command is executed, the CPU 10 (d.

A basic clock pulse a as shown in [21st line] is supplied to the counter CTR7. At this time, the CPU 10 reads from the memory 12 a count value n corresponding to the speed mode determined according to the printing 1fiJ1 (for example, the speed of the motor number 1 determined by the number of character dots) and resets it in the counter CTR1. Counter CTR1 is the second
As shown in the figure, CPU 1
The basic clock pulse a supplied from 0 is divided and supplied to the output/J clock bi counter CTR2.

The counter CTR2 starts counting operation by the gate signal C supplied from the CPU 1o, and the counter CT
Count the basic clocks given by RI, 07resb. At this time, the CPU 10 calculates the count number ll1t' m according to each drive state of acceleration and deceleration of the motor II.
MC+ is taken out from the memory 12 and preset to the counter CTR2. As a result, the counter CTR2 generates, for example, a signal as shown in FIG. 3 (when the count value m is 5) and outputs it to the CPU 10. The CPU 70 generates excitation phase data according to the period of the pulse signal d supplied from the counter CTR2 and supplies it to the motor drinos 14.

Here, assuming that the motor 11 is to be accelerated, for example, the CPU 10 presets a count value m (m1 to ms in FIG. 4) corresponding to Karo speed data from the memory 12 into the counter CTR2. As mentioned above, the counter CTRZ counts according to the basic clock signal, the pulse bf, and the preset count number m1''mg.Thereby, the counter CTR2 generates a pulse signal d as shown in FIG. is generated and supplied to the CPU JO.

The CPU 70 generates excitation phase data according to the pulse signal d and supplies it to the motor driver J4.

The motor driver 14 supplies excitation frost and current to phases A to D of the motor 11 at timings as shown in FIG. 4, for example, in accordance with excitation phase data. As a result, the motor 1 is gradually accelerated according to the cycles T1 to T7 of the pulse signal d. In addition, when decelerating the motor 11, the CPU
10 presets the count number 1 series corresponding to the speed data from the memory 12 into the counter CTR2.As a result, the counter CTRZ it: generates a pulse signal d whose cycle gradually increases, and the motor number 1 is It is gradually slowing down.

In this way, by storing acceleration, deceleration data, and speed mode data in the memory 12 in advance, vibrations can be fully suppressed when accelerating or decelerating the motor 1), and speed fluctuations can be prevented during constant speed and stopped states. This can be prevented from occurring. Further, a basic clock signal b whose period changes depending on the speed mode is supplied from the counter CTR1 to the counter c'rR2. Counter CTR2 is
A basic clock pulse b is supplied to the force 10 in accordance with the acceleration and deceleration data. Therefore, using one type of acceleration and deceleration data, CPU10 generates excitation phase data that corresponds to each speed mode and also enables vibration suppression.

Therefore, it is not necessary to prepare each acceleration and deceleration data according to the speed mode, and the amount of acceleration and deceleration data can be significantly reduced. Thereby, the capacity of the memory 12 for storing acceleration and deceleration data can be significantly reduced.

〔Effect of the invention〕

As described in detail above, according to the present invention, acceleration and deceleration data for vibration suppression can be significantly reduced, and the occurrence of speed fluctuations, which are vibrations when the stepping motor is at constant speed and when it is stopped, can be significantly prevented.

Therefore, it is possible to significantly reduce the memory capacity for storing acceleration, deceleration data, and speed mode data, and to provide an extremely useful stepping motor drive control wave ``1'' that can drive the stepping motor reliably and stably.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the main structure of a stepping motor drive and control device according to an embodiment of the present invention, and Figs. This is a timing chart for explaining the operation of loading the camera. IO...Microprocessor, 11...Stepping mode, 12...Memory, 13...Programmable counter, 14...Motor dry nozzle. 13' Fig. 2 b (n = 3 n i3 Fig. 4!) ゛+T7 @ Fig. 5 CI

Claims (1)

[Claims] a memory means for storing in advance predetermined acceleration/deceleration count numerical data corresponding to acceleration and deceleration data of the stepping motor and speed count numerical data corresponding to the speed mode;
A control means outputs the acceleration/deceleration count numerical data and speed count numerical data corresponding to the driving state of the stepping motor from the memory means, and a control means based on the speed count value set by the control means. a first counting means that performs a counting operation and generates all the basic clock signals with a period corresponding to the speed mode; and a first counting means that performs a counting operation and generates all basic clock signals with a period corresponding to the speed mode; a second pulse signal that counts the supplied basic clock signal and generates a pulse signal with a period corresponding to changes in acceleration/deceleration of the stepping motor;
counting means, generating means for generating excitation phase data of the stepping motor based on the cycle of the pulse signal supplied from the second counting means, and excitation phase data supplied from the generating means. (Generates an excitation current according to the face phase data to drive the stepping motor.)
Me1Q11 means ↓! , 41i7 A stepping motor (11i motion control device) characterized by: