JP3193077B2 - Cycle timer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a cycle timer device used for controlling a component mounting machine.

[0002]

2. Description of the Related Art Conventionally, as means for obtaining a timing for controlling an XY table of a mounting machine, for example, Japanese Patent Laid-Open No. 61-12 / 1986
A "cycle timer device" disclosed in Japanese Patent Application Publication No. 0204 is known.

The configuration and control method will be described below with reference to FIGS.

FIG. 4 shows a general configuration of a mounting machine using a cycle timer device. Reference numeral 1 denotes an electric motor which rotates a mounting head 3 by changing continuous rotation to intermittent rotation via an index 2. Drive. Reference numeral 4 denotes a shaft which rotates in conjunction with the electric motor 1 and obtains timing required for control. A rotary encoder 5 which converts the rotation angle of the shaft 4 into an electric signal and outputs the signal is connected. The cycle timer device 6 controls the timing required for controlling the XY table 8 in accordance with a set angle for turning on and off a pre-programmed output signal and a rotation angle of the shaft 4 obtained from a signal from the rotary encoder 5. Outputs an output signal to the controller 7.

The operation of the mounting machine will be described.
Is changed to intermittent rotation via the index 2 to rotate the mounting head 3 by one index.

Therefore, the nozzle of the mounting head 3 is lowered to mount the component. At the same time as the nozzle rises and the mounting head 3 starts rotating, the output signal is turned on by the setting of the cycle timer device 6, and the XY table 8 starts moving. Thereafter, the mounting head 3 is moved while the XY table 8 is moving.
Is further rotated by one index, the XY table 8 stops, and the nozzle of the mounting head 3 starts lowering, and at the same time, the output signal is turned off by the setting of the cycle timer device 6, and the next component is mounted by the lowering of the nozzle. You. The component mounting is performed by repeating such a movement.

The rotation speed of the electric motor 1 can be changed by the controller 7, and the speed can be reduced in order to prevent the parts from falling when the mounted parts are large.

FIG. 5 shows a control flow in the cycle timer device 6. First, in step S21, the rotation angle of the shaft 4 is detected through the rotary encoder 5, and the angle detected in step S22 is compared with a preset angle for turning on the output signal. If they do not match, the process returns to step S21. If they match, step S
At 23, the output signal is turned on. Then, step S24
The rotation angle of the shaft 4 is detected again, and the angle detected in step S25 is compared with a preset angle for turning off the output signal. If they do not match, the process returns to step S24. If they match, the process returns to step S26. Turn off the output signal with.

[0009]

However, in the control method as described above, after the rotation angle of the shaft 4 matches the on / off angle of the output signal set in the cycle timer device 6, the control signal is sent through the controller 7. Since the XY table 8 is controlled, a processing delay time occurs. The processing delay time is a characteristic inherent to the apparatus. As the rotation speed of the shaft 4 increases, the ratio of the processing delay time to the movable time of the XY table 8 increases. You can only move a distance shorter than the moving distance when using all. FIG. 6 shows a timing chart at this time.

In order to adjust the processing delay time, it is conceivable to set the ON and OFF angles of the output signal earlier by the correction angle Δθ ₀ obtained by the equation (1).

Δθ ₀ = 360 · V ₀ · Δt (1) Δθ ₀ : Correction angle (°) V ₀ : Rotation speed of the shaft 4 (constant) (r / s) Δt: Processing delay time (s) Since the rotation speed of the head 3 changes, if this rotation speed is lower than V ₀ (the rotation speed at this time is V ₁ ), the angle Δθ ₁ to be originally corrected is (2)
From the equation, Δθ ₁ = 360 · V ₁ · Δt (2) Since V ₀ > V _1, Δθ ₀ > Δθ ₁ , and the XY table 8 moves before the actual moving timing, resulting in damage to the device. There is a problem of fear.

The present invention has been made in view of the above-mentioned conventional problems, and provides a cycle timer device which can eliminate an operation stop dead time due to a processing delay time and can appropriately cope with a change in the rotation speed of a mounting head. With the goal.

[0013]

According to the present invention , an XY object to be controlled when a rotation drive angle of a mounting head reaches a predetermined value.
Component mounting for turning on / off the output signal for the table
A cycle timer device in the machine, an angle detection means for detecting the rotation drive angle, a speed detecting means for detecting a rotational speed for rotating the mounting head, the velocity detection
The output signal is turned off based on the rotational speed detected by the means.
For the set angle for turning on and off, the output signal
A correction means for performing a processing delay time of the correction when the controlled object is operating, the rotation angle said angle detecting means detects the
The angle is compared with the set angle corrected by the correction means, and the angle is detected.
The rotation angle detected by the means is the set angle corrected by the correction means.
Output means for turning on and off the output signal when the rotation angle reaches a degree, and the rotation angle detected by the angle detection means is
Until the set angle corrected by the correction means is reached, the angle detection is performed.
Each time the rotation angle is detected by the output means, the rotation is detected by the speed detection means.
The rotational speed is detected, and the compensation is performed based on the detected rotational speed.
Setting to turn on and off the output signal again by correct means
The angle is corrected, and the angle is detected based on the corrected set angle.
When the rotation angle detected by the output means has reached, the output means
The output signal is turned on and off .

[0014]

According to the present invention, the rotation is performed every time the rotation angle is detected.
Detects the speed and corrects the set angle according to the speed.
On and off during rotation speed fluctuation
The rotation angle is detected until the set angle is reached.
On / off setting for the processing delay time corresponding to the current speed
How the rotation speed fluctuates because the fixed angle can be corrected
Even if the output signal is turned on and off at the correct timing
Can be .

[0015]

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

The overall configuration of the mounting machine is the same as the configuration described with reference to FIG. 4 for the conventional example, and the description thereof will be omitted, and repeated description will be omitted.

FIG. 1 shows a control flow in the cycle timer device 6. In FIG. 1, first, in step S1, the rotation angle of the shaft 4 is detected through the rotary encoder 5, and in step S2, the rotation speed of the shaft 4 is detected.
Next, in step S3, a correction angle is calculated by equation (3) based on the rotational speed detected in step S2 and a processing delay time set in advance or actually input.

Δθ = 360 · V · Δt (3) Δθ: Correction angle (°) V: Rotation speed of shaft 4 (r / s) Δt: Processing delay time (s) Next, in step S4, calculation is performed in step S3 An angle at which a preset output signal is turned on is corrected based on the corrected angle. Next, in step S5, the angle at which the output signal corrected in step S4 is turned on is compared with the rotation angle of the shaft 4 detected in step S1, and if they do not match, the process returns to step S1; To turn on the output signal to the controller 7.

Thereafter, in step S7, the same rotation angle detection as in step S1 is performed, in step S8, the same speed detection as in step S2 is performed, and in step S9, the same correction angle calculation as in step S3 is performed. In step S10, a preset angle for turning off the output signal is corrected based on the correction angle calculated in step S9. Next, step S1
In step 1, the angle at which the output signal corrected in step S10 is turned off is compared with the rotation angle of the shaft 4 detected in step S7. If they do not match, the process returns to step S7. Turn off the output signal.

FIG. 2 is a timing chart of the mounting machine when control is performed based on the above control flow. It can be seen that there is no shift in the operation of the XY table 8 with respect to the ON / OFF set angles of the cycle timer device 6.

FIG. 3 shows another embodiment of the present invention. In this embodiment, in place of the speed detection in steps S2 and S8 in the above embodiment, in steps 2a and 8a, speed or data similar to the speed is extracted from the data for controlling the electric motor 1, and the value is obtained. It is configured to correct the ON / OFF setting angle of the output signal based on the output signal. As a specific example, since the mounting tact is stored in the controller 7 in advance to control the rotation speed of the electric motor 1, this data is extracted in steps 2a and 8a.
In steps 3a and 9a, a correction angle is calculated using this mounting tact.

The calculation equation is shown in equation (4).

Δθ = 360 · Δt / T (4) Δθ: correction angle (°) T: mounting tact (s) Δt: processing delay time (s)

[0024]

According to the cycle timer device of the present invention ,
Calculates a correction angle based on the rotational speed and the processing delay time of the instrumentation wearing head-on preset output signal, on an output signal at a timing of performing the correction for off-angle,
To turn off, the rotation speed of the mounting head is changed, it is possible to eliminate the operation stop dead time of the XY table that could interfere with instrumentation <br/> deposition head, allows an efficient component mounting.

[Brief description of the drawings]

FIG. 1 is a control flowchart of a cycle timer device according to one embodiment of the present invention.

FIG. 2 is a timing chart of a mounting machine using the cycle timer device according to one embodiment of the present invention.

FIG. 3 is a control flowchart of a cycle timer device according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a mounting machine using a cycle timer device.

FIG. 5 is a control flowchart of a conventional cycle timer device.

FIG. 6 is a timing chart of a mounting machine using a conventional cycle timer device.

[Explanation of symbols]

 3 mounting head 5 rotary encoder 6 cycle timer device 7 controller 8 XY table

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kenichi Sato 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-61-120204 (JP, A) 192714 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) G05D 3/00-3/20

Claims (3)

(57) [Claims] 1. A cycle timer device in a component mounting machine for turning on / off an output signal to an XY table to be controlled when a rotation drive angle of a mounting head reaches a predetermined value, wherein the rotation drive angle is detected. Angle detection means for detecting the rotation speed of the mounting head
Means based on the rotational speed detected by the speed detecting means.
For the set angle for turning on and off the force signal, the output
And correcting means for performing auxiliary <br/> positive processing delay time period when the control target is operated by a signal, the rotation angle said angle detecting means has detected, the correction means
Comparing with the corrected set angle, the angle detecting means detects
Rotation angle reached the set angle corrected by the correction means
Output means for turning on and off the output signal at times, wherein the rotation angle detected by the angle detection means is compensated by the correction means.
Rotate with the angle detection means until the corrected set angle is reached
The rotation speed is detected by the speed detection means every time the angle is detected
And based on the detected rotation speed,
Correction of the set angle for turning on and off the output signal again
And the angle detecting means detects the corrected set angle.
When the rotation angle reaches the output angle, the output means outputs the output signal.
A cycle timer device that turns on and off . 2. The cycle timer device according to claim 1, wherein the correction means corrects the set angle at which the output signal is turned on and off so as to be earlier by an angle corresponding to the processing delay time. 3. The cycle timer device according to claim 2, wherein the correction means calculates an angle corresponding to the processing delay time according to the rotation speed at which the rotation is driven.