JPH0553645A - Method and device for fixed positioning unmatched position of rotary device - Google Patents

Abstract

PURPOSE:To secure a method and a device for fixed positioning a unmatching position of a rotary device like a laser beam scanner containing a rotor unified with a motor main body, etc., to automatically stop the unmatched part of the rotary part of the rotary device at a fixed position at all times for the dynamic balance adjustment of the rotary part. CONSTITUTION:An unmatched part of a rotary part 3 of a rotary device A containing a rotor 5 unified with a motor main body 1 is specified based on the date detected by a vibration sensor 9 and a measurement start point sensor 10. Then the electrification is disconnected to the motor main body 1 and the part 3 of an inertial rotation mode is forcibly rotated in the rotational frequency prescribed by a pulse motor 17 different from the motor 1. Then the motor 17 is controlled so that the unmatched part stops automatically at a fixed position at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention was developed to improve the efficiency or automation of the work of adjusting the dynamic balance of a rotating device in which a rotor is integrally mounted on a motor body in the assembly and manufacturing process of a laser beam scanner motor or the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for constant positioning of a misaligned position of a rotating device.

[0002]

2. Description of the Related Art Rotating bodies that rotate at high speed often generate vibrations when they are not balanced in motion, which adversely affects the apparatus including the rotating bodies. Among these rotating devices, especially in the case of a laser beam scanner motor, the precision of the surface finish of the mirror surface that reflects the laser beam, which is the heart of the rotating device, and the dimensional processing precision of the rotating body including these are strictly required, and they are rotated. At the same time, it is required that the core run out at the same time as it can exhibit the same performance. Therefore, in the assembly manufacturing process of these rotating bodies,
Be sure to adjust the dynamic balance of the rotating body.

The conventional work of adjusting the dynamic balance of the rotating body will be described with reference to FIGS. 4 and 5.
A vibration sensor 101 is fixedly attached to the motor set base 100, and the vibration detection signal is input to the balancer 102. On the other hand, the measurement origin detection sensor 103 is
With the laser beam scanner motor 104 fixed to 100, a rotating body 105 such as a mirror is fixedly set at a position where a measurement starting point mark 107 attached to a rotary flange portion 106 mounted coaxially can be detected. In the figure, 108
Is a rotating shaft.

In this state, the laser beam scanner motor
When the 104 is driven, the vibration sensor 101 detects the vibration generated by the rotating part including the rotating body 105 and the rotating flange part 106 and transmits it to the balancer 102, and the signal is transmitted to the balancer 102.
Internally, it is converted into an unbalanced (mismatched) amount of the rotating portion by arithmetic processing and displayed. On the other hand, the measurement start point mark 107 is detected by the measurement start point detection sensor 103 and transmitted as a pulse signal to the balancer 102, and the position of the mismatched portion is displayed on the balancer 102 as an angle based on the measurement start point mark 107. .

Since the misalignment amount and the misalignment position are measured on these displays, the operation of the laser beam scanner motor is stopped, and an appropriate amount of weight is attached to the misalignment position of the rotating portion according to the displayed data. On the contrary, an appropriate amount is scraped off to adjust the dynamic balance, and when the dynamic balance cannot be achieved by one operation, the above procedure is repeated.

However, the misaligned positions of the rotating body 105 and the rotating flange portion 106 of the laser beam scanner motor which has been stopped do not determine at which position of 360 degrees the stationary state is achieved. Therefore, it is the current situation that the unbalanced position is read by using the measurement starting point mark 107 as a mark and the dynamic balance adjustment work is performed. This misalignment position reading work is quite difficult in practice because it is a simple work, that is, there is a misreading of the misalignment position angle displayed on the balancer 102, or the measurement starting point mark 107 is used as a mark. However, there is a problem that the wrong position is often specified when the misalignment position is specified. Therefore, it has been a bottleneck for improving the efficiency or automation of the dynamic balance adjustment work.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is to solve the problem that an unmatched portion based on the measurement starting point is based on the data detected by the vibration sensor and the measurement starting point detecting sensor. Position was identified, the power supply to the motor body such as the laser beam scanner motor was cut off, and the rotating part during inertial rotation was forcibly rotated at the number of rotations specified by the pulse motor other than the motor body. It is another object of the present invention to provide a constant positioning method for a misaligned position of a rotating device and a device for controlling the pulse motor so that the misaligned portion always automatically stops at a fixed position.

[0008]

In order to solve the above-mentioned problems, the present invention detects the vibration of a set table that horizontally holds a rotating device in which a rotating body is integrally mounted on a motor body, and at the same time includes the rotating body. After detecting the measurement starting point of the rotating part and measuring the position of the inconsistent part that generates vibration from both detection data as the rotation angle difference based on the measurement starting point, the power supply to the motor body is cut off and inertial rotation is performed. A rotating shaft for positioning, which is driven and rotated by a pulse motor, is coaxially connected to the inner rotating portion via a rubber pad at the tip thereof, and the rotating portion is rotated at the number of rotations specified by the pulse motor and at the same time A measurement starting point is detected, and based on the measurement data of the rotation angle difference and based on the measurement data of the rotation angle difference, the pulse motor is controlled so that the non-matching portion stops at a fixed position. Was established-decided Me method.

Further, a set base for horizontally holding a rotating device in which a rotating body is integrally mounted on a motor body, a vibration sensor for fixing the rotating device to detect vibration of the rotating device, and a rotating body for the rotating device are provided. Including a measurement starting point detection sensor that detects the measurement starting point mark attached to the rotating part, input the signals from both sensors to the balancer, measure the starting point signal, and measure the position and the position of the unmatched part of the rotating part that causes vibration A pulse motor is fixed to a detecting means for generating an angle signal according to a rotation angle difference from the starting point, and a rotary arm which is above the rotating device and is movable vertically and rotationally. Positioning means, which is driven to rotate and has a positioning rotary shaft vertically attached with a rubber pad attached to the lower end, and the rotary part of the rotary device for positioning by moving the rotary arm. Rolling the shaft in a state coupled coaxially via a rubber pad, based on the measurement origin signal and the angle signal output from the balancer of the detecting means,
A constant positioning device for a misaligned position of a rotating device is configured by a control device that outputs a control signal to a pulse motor so that the unmatched part of the rotating part stops at a fixed position.

[0010]

According to the constant positioning method and apparatus for a rotating device of the present invention having the above contents, a rotating device having a rotating body integrally mounted on a motor body is horizontally held on a set base. When rotating at a constant rotational speed, when the dynamic balance of the rotating part including the rotating body is not balanced, the rotating part generates a core runout, and the vibration causes the vibration through the motor main body of the rotating device and the setting table. It is detected by the vibration sensor fixed to the set stand, and the signal is input to the balancer, while the measurement start point mark attached to the rotating part is detected by the measurement start point detection sensor, and the signal is input to the balancer, and the vibration and the measurement start point are detected. Both signals are processed inside the balancer to obtain the position of the unmatched part with the measurement origin as a reference as an angle signal according to the rotation angle difference, and then the motor main body of the rotating device is de-energized and inertial rotation is performed. The rotating arm is rotated and moved up and down to the inner rotating part to coaxially connect the rotating shaft for positioning through the rubber pad, and the rotating part is rotated at the number of rotations specified by the pulse motor and at the same time, The measurement starting point is detected, and the pulse motor control device is operated based on the measurement starting point signal and the angle signal to control the pulse motor so that the unmatched portion stops at a fixed position.

[0011]

The present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. The present invention is based on measured data of an unmatched portion of a rotating device (laser beam scanner device) of a rotating device (laser beam scanner device) in which a rotating body such as a polygon mirror is integrally mounted on a motor body such as a laser beam scanner motor. Controls the pulse motor that forcibly rotates the rotating part that is rotating inertially after the power is cut off, and automatically stops the position of the unmatched part of the rotating part so that it is always at a fixed position. Is. 1 and 2 show a typical embodiment of the present invention, in which A is a rotating device, B is a supporting device, C is a detecting device, D is a positioning device, and E is a control device.

The rotating device A has a rotating portion 3 fixed to a rotating shaft 2 of a motor body 1. The rotating portion 3 has a rotating body 5 mounted on a mounting flange 4 fixed to the rotating shaft 2. I am configuring. In addition, a measurement starting point mark 6 is attached to the side surface of the rotating portion 3 at an appropriate position, that is, the one shown in the drawing. If the rotating portion 3 is not exactly axisymmetric with respect to the rotating shaft 2, the motor body 1 rotates at a high speed (for example, 4,000 to 5,000 rotations / minute in a laser beam scanner device, 20,00 in a higher speed one).
Shaft shake and vibration occur due to 0 rotations / minute. One of the causes is the problem of the assembly accuracy when the rotating body 5 such as the polygon mirror is mounted on the mounting flange 4, and the one is the problem of the coaxiality between the rotary shaft 2 and the mounting flange 4. This is a problem of the main body 1 itself. When the rotating part 3 swings or vibrates, the reflecting surface of the polygon mirror, which is the rotating body 5, fluctuates irregularly, which adversely affects the reflection of the laser beam and the performance of a printer or a copying machine incorporating the rotating device A. Will be significantly impaired.

The supporting means B fixes a set table 8 to one side of the upper surface of the base plate 7, and the motor main body 1 of the rotating device A can be detachably fixed to the central portion of the upper surface of the set table 8 by an appropriate means. It has a structure. In the present embodiment, a structure is shown in which a part of the motor body 1 is fitted in the set base 8 in an embedded state and can be fixed by an appropriate fixing means such as a screw stopper or a vacuum chuck.

The detecting means C is a vibration sensor 9 fixed to a proper position of the set table 8, a measurement starting point detecting sensor 10 for detecting the measurement starting point mark 6, and a signal for transmitting these signals to perform arithmetic processing and measurement. It is composed of a storage circuit, an arithmetic circuit, a control circuit, etc. for displaying the measured value of the angle and the unbalance amount of the position of the rotationally unmatched portion of the rotating portion 3 with respect to the starting point and generating the measurement starting point signal and the angle signal. It consists of a balancer 11. In the present embodiment, the vibration sensor 9 is fixed to the set table 8 and the measurement starting point detection sensor 10
Are arranged in a non-contact state at a position facing the measurement starting point mark 6. Here, the measurement starting point detection sensor 10 is preferably an optical detection sensor utilizing reflection of laser light.

The positioning means D is the base plate 7
The rotary cylinder 12 is fixed to the other side of the upper surface of the rotary seat 13 and the rotary seat 13 is attached to the cylinder.
Fix the vertical moving cylinder 14 to the cylinder rod
By fixing the substantially central part of the rotary arm 16 to 15,
A pulse motor 17 is mounted on one side, and a positioning rotary shaft 18 is rotatably provided on the other side, and a timing pulley 19 fixed to the drive shaft of the pulse motor 17 is provided on the upper surface side of the rotary arm 16. The timing belt 21 is stretched between the timing pulleys 20 fixed to the upper end of the positioning rotary shaft 18, so that the positioning rotary shaft 18 is driven to rotate by the drive of the pulse motor 17, and the positioning rotary shaft 18 is rotated. A rubber pad 22 is attached to the lower end of the shaft 18 protruding below the rotary arm 16 to form a structure. Here, driving the rotating cylinder 12 causes the rotating seat 13 to rotate, which causes the rotating arm 16 to rotate, and driving the vertically moving cylinder 14 causes the cylinder rod 15 to move up and down, which causes the rotating arm 16 to move. It moves up and down. In this way, the rotary arm 16 is rotated to set the positioning rotary shaft 18 at the coaxial position with the rotary shaft 2 of the rotary unit 3 of the rotary device A, and then the rotary arm 16 is moved downward to move the rubber pad 22. It is possible to press-contact the rotating portion 3 and connect the positioning rotary shaft 18 and the rotating portion 3 coaxially. The reverse is also possible as a matter of course.

The controller E drives and controls the rotary cylinder 12 and the vertically moving cylinder 14, and also rotationally drives the pulse motor 17 by the measurement start point signal and the angle signal output from the balancer 11 of the detecting means C. , The timing belt 21, the positioning rotary shaft 18, and the rubber pad 22 are used to forcibly rotate the rotating portion 3 of the rotating device A, and the misaligned portion is controlled to stop at a desired fixed position. . An input device is appropriately connected to the control device E so that necessary data can be input in advance and the start and stop of the system can be controlled.

Next, an example of signal processing by the detecting means C is shown in FIG. The upper signal is a vibration waveform detected by the vibration sensor 9, which is a complicated one in which minute vibration elements are superposed, but is simply displayed as a sine wave. The peak position of this waveform corresponds to the unmatched portion of the rotating portion 3, and in this embodiment, the negative peak position appears due to the lack of the mass of the portion that should be originally uniform, and the amount of loss ( The amount of unbalance) corresponds to the absolute value of the amplitude. The lower signal is a pulse signal of the measurement starting point mark 6 detected by the measurement starting point detecting sensor 10, and the period τ of this pulse is the time required for the rotating portion 3 to make one rotation, and the pulse rotates at a constant rotation speed. When it does, the period τ is a constant value. Then, first, the balancer 11 monitors the period τ, skips the data reading until the value becomes constant, and when the period becomes constant, the period τ is stored in the internal memory and the vibration waveform by the vibration sensor 9 is also stored. To do. Then, the time T to the negative peak position of the vibration waveform immediately after that and the absolute value of the peak are calculated with the generation time of the pulse by the measurement starting point mark 6 as the starting point. Based on these data, the position of the unmatched portion based on the measurement starting point is used as the rotation angle difference θ (= 360 × T
In addition to displaying / τ (degrees), the unbalance amount is displayed, and an angle signal proportional to the rotation angle difference θ is generated.

In order to adjust the dynamic balance of the rotating device A by the device of the present invention, first, the motor main body 1 of the rotating device A is fixed to the set table 8 and the rotating portion 3 is rotated by energizing. Then, the vibration sensor 9 and the measurement origin detection sensor
The signal detected by 10 is transmitted to the balancer 11,
The misalignment position (angle) and the unbalance amount from the measurement starting point mark 6 are displayed. Then, the motor body 1 is de-energized, and the rotary cylinder 12 is driven by a signal from the controller E while the rotary unit 3 is inertially rotating to drive the rotary arm 12.
After rotating 16 by a predetermined angle, the vertical movement cylinder 14 is driven by a signal from the control device E to lower the rotating arm 16, and at the same time, the pulse motor 17 is rotated at a predetermined rotation speed (1 to 2 rotations / second). Rotate. Eventually, the rotating part 3 which has been inertially rotated will rotate at the rotational speed transmitted from the pulse motor 17 from the time when the rubber pad 22 comes into contact. In this state, the measurement starting point mark 6 attached to the rotating portion 3
Is detected by the measurement starting point detection sensor 10, and only the number of pulses matching the angle transmitted as the angle signal of the unmatched portion from the time when the detected measurement starting point signal is input to the control device E via the balancer 11. The pulse motor 17 is rotated and stopped, and thus the rotating unit 3 is stopped.

Here, the number of pulses matching the angle transmitted as the angle signal is determined depending on which position (which position of 360 °) the position of the mismatching portion is stopped. The calculation is preliminarily set in the control device E. That is, the number of control pulses of the pulse motor 17 is determined by the angle of the position of the unmatched portion based on the measurement starting point mark 6 and the angle of the stop position of the unmatched portion based on the measurement starting point detection sensor 10. .

Thus, the unaligned portion of the rotating portion 3 automatically stops at a constant desired position with respect to the setting table 8.
Then, in the work of adjusting the dynamic balance of the rotating portion 3, in this stopped state, the weight of the adhesive or the like corresponding to the unbalance amount is attached to the mounting flange 4 corresponding to the unaligned portion. The application of the adhesive may be manual, but it can also be automated. When the position of the unmatched portion is caught as an excessive mass portion, the unmatched portion is cut. After this adjustment work, the vertical movement cylinder 14 and the rotation cylinder 12 are driven by a signal from the control device E to return the rotation arm 16 to the initial position shown in FIG. 2, and the motor body 1 is energized again to adjust the dynamic balance. Detect good or bad. In this detection, the vibration sensor 9
If the vibration signal due to is below a certain level, it is judged that the dynamic balance has been achieved, and that fact is displayed on the balancer 11.However, if a vibration signal above a certain level is obtained, the same procedure is used again. Adjust the balance.

The pulse motor 17 receives a signal from the balancer 11, and based on the signal, the controller E
It rotates by a certain angle corresponding to the number of pulses by the control signal generated from
The rotation angle per pulse of is not an integer angle. Therefore, the timing pulleys 19 and 20 are converted to rotate by an integer angle with one pulse, and for example, one pulse is converted into one.
The rotation angle is adjusted so that a rotation angle of 1 degree can be obtained with 10 pulses.

Further, the apparatus of the present invention can be entirely automated. For example, when the mounting completion signal is input to the control device E after the rotating device A is automatically mounted on the set table 8, a signal to start energizing the motor body 1 of the rotating device A is generated to rotate the rotating portion 3. Then, the balancer 11 detects the vibration and the measurement starting point mark 6, and transmits the angle signal and the measurement starting point signal based on the vibration and the measurement starting point signal to the control unit E. Upon receiving the signal, the control device E transmits a signal to turn off the power supply to the motor body 1 to inertially rotate the rotating portion 3 and then transmits a drive signal from the control device E to the rotary cylinder 12, which completes the movement. At the same time, a drive signal is transmitted to the vertical movement cylinder 14 and at the same time a rotation signal is transmitted to the pulse motor 17, and the measurement starting point mark 6 is detected immediately after the rotating portion 3 starts rotating at the rotation speed specified by the pulse motor 17. The control signal of the desired number of pulses is input to the pulse motor 17 based on the measurement start point signal resulting from the above, and the unmatched portion of the rotating portion 3 is stopped at the desired position. Upon receipt, the rotary arm 16 is returned to the initial position, and the motor body 1 is energized to detect the vibration of the rotating portion 3 to determine whether the adjustment work is completed. Communication The exit full work standing, if not completed is to be repeated the procedure again.

[0023]

As described above, according to the method and apparatus for constant positioning of the unaligned position of the rotating device of the present invention, the position of the unmatched portion of the rotating part of the rotating device in which the rotor is integrally mounted on the motor body is adjusted. It is possible to automatically move and stop at a fixed position with respect to the set table, and it is not necessary to judge where the mismatch position is each time as in the conventional case, and a reading error of the mismatch position or There is no setting error, not only can the quality of the work to adjust the dynamic balance of the rotating body be improved, but
The repetitive work can be performed extremely easily, and further automation can be achieved.

[Brief description of drawings]

FIG. 1 is a simplified side view of a constant positioning device of the present invention.

FIG. 2 is a simplified plan view of the same.

FIG. 3 is a graph showing signal waveforms detected by a vibration sensor and a measurement origin detection sensor.

FIG. 4 is a simplified plan layout diagram showing a conventional example.

FIG. 5 is a simplified side view layout diagram also showing a conventional example.

[Explanation of symbols]

A Rotating device B Supporting means C Detecting means D Positioning means E Control device 1 Motor body 2 Rotating shaft 3 Rotating part 4 Mounting flange 5 Rotating body 6 Measurement starting point mark 7 Base plate 8 Set stand 9 Vibration sensor 10 Measuring starting point detecting sensor 11 Balancer 12 Rotating cylinder 13 Rotating seat 14 Vertical cylinder 15 Cylinder rod 16 Rotating arm 17 Pulse motor 18 Positioning rotating shaft 19 Timing pulley 20 Timing pulley 21 Timing belt 22 Rubber pad

Claims (2)

[Claims] 1. The vibration of a set base that horizontally holds a rotating device in which a rotating body is integrally mounted on a motor body is detected, and at the same time, a measurement starting point of a rotating portion including the rotating body is detected, and the vibration is detected from both detection data. After measuring the position of the inconsistent part to be generated as a rotation angle difference with the measurement starting point as a reference, the motor main body is de-energized, and the rotating part driven by a pulse motor rotates the rotating part during inertial rotation. The shaft is coaxially connected through a rubber pad at its tip, the rotating portion is rotated at the number of rotations specified by a pulse motor, and at the same time, the measurement starting point is detected, and the rotation angle is based on the measurement starting point. A constant positioning method for a mismatching position of a rotating device, comprising controlling a pulse motor so that the mismatching part stops at a fixed position based on the difference measurement data. 2. A set base for horizontally holding a rotating device in which a rotating body is integrally mounted on a motor body, a vibration sensor for fixing the rotating device to detect vibration of the rotating device, and a rotating body for the rotating device. Including a measurement starting point detection sensor that detects the measurement starting point mark attached to the rotating part, input the signals from both sensors to the balancer, measure the starting point signal, and measure the position and the position of the unmatched part of the rotating part that causes vibration A detection means for generating an angle signal according to a rotation angle difference from a starting point, a pulse motor is fixed to a rotary arm which is above the rotation device and which is vertically movable and rotatable, and the pulse motor is used. Positioning means, which is driven to rotate and has a positioning rotary shaft vertically attached with a rubber pad attached to the lower end, and a rotary part of a rotary device and a rotary position for positioning by moving the rotary arm. In a state where the shaft is coaxially connected via a rubber pad, based on the measurement start point signal and the angle signal output from the balancer of the detection means, the unmatched portion of the rotating portion is stopped at a fixed position. A constant positioning device for a misaligned position of a rotating device, comprising: a control device that outputs a control signal to a pulse motor;