JPS5836195A - Controlling method for pulse motor - Google Patents

Abstract

PURPOSE:To accurately correspond a rotor to a starting position by exciting a phase to become starting point before a stator to become the starting point is excited after the phase adjacent to the phase is excited. CONSTITUTION:When the fourth and first phases are, for example, excited as a starting point in a stator of a pulse motor 1, the adjacent phase such as the first and second phases are excited before the above two phases are excited, thereby moving a rotor. Then, the fourth and first phases to become starting point are excited, thereby positioning the rotor at the normal position, namely, the stable point. A sprocket wheel 3 is rotated by the pulse motor 1, thereby feeding a paper tape 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulse motor control method, and more particularly to a pulse motor control method that can accurately position a pulse motor whose initial position is uncertain at the time of startup.

This will be explained below using the drawings.

Figure 1 is a side view showing an example in which a /NON throughk is applied to the tape feed mechanism of a paper tape punch or paper tape league, where 1 is a pulse motor and 2 is connected to the output shaft of this 6-channel motor. A drive shaft, 3 is a striped rocket wheel attached to this drive shaft 2, 5 is a paper tape, 6 is a feed hole drilled in this paper tape 5, 7 is a sensor that receives light from a light emitting element 8 and this light emitting element 8 The paper tape 5 is made up of a light-receiving element 9 and a paper tape 5 is attached.

Detect whether or not it is being read.

These various paper tape leagues or paper tape punches are first made by manually inserting the paper tape 5 into locations.

Set it on wheel 3. Therefore, the striped rocket wheel 3 is rotated to an arbitrary position, and the motor 1 is also rotated via the drive shaft 2. This may inadvertently cause the rotor to stop at a neutral point between the phases.

On the other hand, the sensor 7 is generally positioned so as to face the lower position of the feed hole when the paper tape 5 is set in the correct position, that is, when the rotor of the pulse motor I is in the normal position. . After setting the tape, turn on the punching start switch or reading start switch. First, the Noculus motor 1 is energized.
The rotor is positioned at the regular starting position, and in this state it is detected whether or not the tape 5 is set.
As described above, if the rotor is stopped at the neutral point between the phases, the rotor will not move to the normal starting position even if the pulse motor 1 is excited. Therefore, the tape 5 cannot be placed at a predetermined position. For example, in the case of checking the presence or absence of the paper tape 5 at a position where there is no feed hole 6 in the paper tape 5 as described above, the sensor 7 happens to be in the feed position. When the paper tape reaches a position facing the hole 6, it is determined that the paper tape is not set and an alarm is generated.

Therefore, in the present invention, no matter what position the rotor is stopped, when the noyal smoke 1 is excited, the i
? The purpose is to position the rotor of the pulse motor at the proper starting position. By this, for example, the paper tape 5 set in a paper tape league or paper tape punch, etc.
An accurate determination can be made by setting the paper tape 5 at a predetermined position and then checking whether the paper tape 5 is set.

A more detailed explanation will be given below with reference to FIG. 2 as well.

FIG. 2 is a diagram for explaining the operation of the pulse motor according to the present invention.

First, when the paper tape 5 is manually set on the sprocket wheel 3, the teeth A of the rotor stop at the neutral point between the fourth phase and the first phase of the stator, as shown in Figure 2 (a). In this case, when two-phase excitation is performed starting from the fourth phase and the first phase of the stator, the leftward force and rightward force are tightly matched, and the rotor remains stationary.

In reality, the rotation of the rotor is accompanied by friction, so when there is a slight difference in this force in the left and right directions, it is easy to determine whether the teeth A of the rotor are in the fourth phase or the first phase of the stator. Even when the rotor is stopped at a position close to 9 on the other hand, if the amount is small, the rotor will remain stationary.

Therefore, for example, when two phases, the fourth phase and the first phase, are excited and used as a starting point, before exciting the above two phases, the adjacent phase, for example, as shown in FIG. 2 (b), ° to the first and second phase
The rotor is energized and moved as shown in FIG. 2 (b). As a result, the rotor moves to the left, so that the teeth A of the rotor move from the neutral point between the fourth phase and the first phase to the fourth phase.

Next, as shown in Figure 2 (c), the fourth point should be the starting point.
By energizing the first phase and the first phase, the rotor can be positioned at a normal position, that is, at a stable point.

Therefore, the hole 6 of the paper tape 5 does not correspond to the sensor 7, and the sensor 7 can reliably determine whether the paper tape is set.

In the above embodiment, the rotor is moved, but it goes without saying that the rotor is moved relative to the stator.

In the above embodiment, only an example in which a 4-phase pulse motor is driven by 2-phase excitation is shown, but it is of course possible to use an n-phase pulse motor to drive 1-phase excitation or 1-2 phase excitation. be.

The present invention is applicable not only to paper tape leagues or paper tape punches, but also to any device that utilizes a pulse motor.

As explained above in detail, the present invention is a pulse smoke control method that reliably locates the starting point of operation of a Noculus motor. By energizing the phase that should be the starting point after energizing, it is possible to accurately associate the rotor with the starting point position when the pulse motor starts operating.

[Brief explanation of drawings]

FIG. 1 is a side view showing a paper tape drive section of a paper tape league or paper tape punch, and FIG. 2 is a diagram for explaining the operation of the Norse motor according to the present invention. 1. Pulse motor, 2. Drive shaft, 3. Sprocket wheel, 5. Tape, 6. Feed hole, 7. Sensor.

Claims (1)

[Claims] /4 A pulse motor control method that reliably locates the starting point of the motor (at the start of motor O operation), and before exciting the stator (or rotor) that should be the starting point, A pulse smoke control method characterized by exciting a phase and then exciting a phase that should reach a starting point.