JP2800317B2 - Precision adjustment machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a precision adjuster, and more particularly, to a precision adjuster for performing precise adjustment of a volume or the like performed on a printed board.

Conventional technology Conventionally, in this type of precision adjuster, the adjusting bit is moved vertically by an up-down driving device,
The adjustment bit is rotated by the rotation of the adjustment motor.

When adjusting a volume or the like placed on a printed circuit board, the adjustment bit is rotated by rotating the adjustment bit with the adjustment section provided at the tip of the adjustment bit coupled to the groove of the adjustment screw such as the volume. Fine adjustment of the adjustment screw such as.

However, when the adjustment bit is removed from the adjustment screw after performing this adjustment, the adjustment value may shift due to the restoring force of the adjustment screw due to various stresses.

In such a conventional precision adjusting machine, an adjusting portion provided at the tip of an adjusting bit is coupled to a groove of an adjusting screw such as a volume disposed on a printed circuit board, and an amount of displacement caused by a restoring force of the adjusting screw is determined. Since the adjustment is performed by predicting in advance, when the displacement amount is different from the predicted value, the adjustment must be performed again.

Therefore, there is a disadvantage that it takes time for adjustment due to trial and error repetition as described above.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the related art, and can automatically perform adjustment, reduce the time for adjustment, and improve the adjustment accuracy. The purpose is to provide precision adjusters.

The precision adjusting machine according to the present invention is a precision adjusting machine that adjusts the object to be adjusted by fitting the tip of the adjustment bit into the adjustment groove of the object to be adjusted and rotating the adjustment bit by a driving unit. Measuring means for measuring the output of the object to be adjusted; detecting means for detecting that the tip of the adjusting bit has been fitted into the adjusting groove based on the measurement result of the measuring means; and adjusting by the detecting means. When the fitting of the tip of the bit into the adjustment groove is detected, a means for raising the tip of the adjustment bit by a predetermined amount, and after performing the adjustment of the object to be adjusted by rotating the driving means, A reverse rotation driving means for rotating the driving means in a direction opposite to a direction by a predetermined amount, and a target for setting the object to be adjusted in accordance with a measurement result of the measuring means; Controlling the driving means to adjust to a value,
Control means is provided for controlling the amount of driving by the reverse rotation driving means so as to sequentially decrease from the predetermined amount in accordance with the number of adjustments of the object to be adjusted by the rotational driving of the driving means.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, and FIG. 2 is a configuration diagram of one embodiment of the present invention. In these figures, a probe 1 measures an output value of a volume (not shown) or the like on a circuit to be adjusted 5 and transmits the measured value to a CP.
Send to U2.

The control unit 20 of the CPU 2 monitors the measured value of the circuit under adjustment 5 measured by the probe 1, outputs a control signal to the motor control circuits 3 and 4, respectively, and drives the motor 7 to rotate the adjustment bit 11.
Then, a drive instruction is notified to the motor 6 that moves the bit adjustment unit 10 supporting the adjustment bit 11 in the vertical direction by the slide mechanisms 8 and 9.

An A / D (analog / digital) conversion circuit 21 A / D converts the measured value of the circuit to be adjusted 5 measured by the probe 1 and sends the measured value to a subtracter 22, a register 24 and a comparator 25, respectively. I do.

The subtractor 22 subtracts the measured value from the A / D conversion circuit 21 from a preset target value, and sends the result of the subtraction to the rotation amount calculation circuit 23.

The rotation amount calculation circuit 23 calculates the rotation amount of the adjustment bit 11 based on the result of the subtraction from the subtractor 22, and calculates the rotation amount by the control unit 20.
And the motor control circuit 4, and notifies the adjustment number counting section 26 that the rotation amount has been newly calculated.

The register 24 temporarily stores the measured value from the A / D conversion circuit 21 and sends the value to the comparator 25.

The comparator 25 stores the measured value from the A / D conversion circuit 21 and the register 24.
When it is detected that these values do not match, that is, that the output of the circuit under adjustment 5 has changed, the control unit 20 and the adjustment number counting unit 26 are notified of this.

The number-of-adjustments counter 26 counts the number of adjustments based on the notification from the rotation amount calculation circuit 23 and the number-of-adjustments counter 26, and sends the count value to the controller 20.

The motor control circuit 3 outputs a drive signal to the motor 6 that moves the bit adjustment unit 10 up and down according to a drive instruction from the control unit 20, and the motor control circuit 4 outputs an adjustment bit according to the drive instruction from the control unit 20. Motor 7 that rotates 11
And outputs a drive signal to the device.

The adjustment bit 11 is supported by a bit housing 14 via a bearing 13 and is connected to the motor 7 via a universal joint 15.

The bit housing 14 is supported by the bit adjustment unit 10 by spring mechanisms 12a to 12f.

The slide mechanisms 8 and 9 can be moved back and forth and right and left by two sets of motors (not shown).

FIG. 3 is a flowchart showing the operation of one embodiment of the present invention. In the figure, FIG. 3 (a) and FIG. 3 (b) are connected at respective points.

The operation of the embodiment of the present invention will be described with reference to FIGS.

As a preliminary stage of this adjustment, the slide mechanisms 8 and 9 are moved back and forth and left and right by two sets of motors, and the bit adjustment unit 10 is positioned on a predetermined poly of the circuit 5 to be adjusted (step 31 in FIG. 3).

When this positioning is completed, the control unit 20 notifies the motor control circuit 3 of a driving instruction for the motor 6, and the motor control circuit 3
, The motor 6 is rotated by a predetermined amount.

With the rotation of the motor 6, the bit adjusting section 10 is pulled down via the slide mechanisms 8, 9, and the adjusting bit 11 comes into contact with the adjusting screw on the volume of the circuit 5 to be adjusted (step 32 in FIG. 3).

When the control unit 29 lowers the bit adjustment unit 10 by a predetermined amount, the control unit 29 notifies the motor control circuit 4 of a driving instruction of the motor 7 and
The motor 7 is rotated under the control of the motor control circuit 4 until a change in the volume output on the circuit 5 to be adjusted is detected (step 33 in FIG. 3).

That is, the motor 7 is driven to rotate the adjustment bit 11 until the tip of the adjustment bit 11 falls into the groove of the adjustment screw on the volume and the output of the volume changes by rotating the adjustment screw.

When the comparator 25 detects that the volume output has changed, that is, when the tip of the adjustment bit 11 falls into the groove of the adjustment screw (step 34 in FIG. 3), the control unit 20 sends the motor control circuit 4 , And notifies the motor control circuit 3 of the drive instruction of the motor 6 in the reverse direction, and rotates the motor 6 in the reverse direction under the control of the motor control circuit 3 to raise the bit adjustment unit 10 by a small amount. (Figure 3 step
35).

Therefore, although the tip of the adjusting bit 11 is in the groove of the adjusting screw, stress applied to the volume can be minimized.

When the above-described processing operation is completed, the rotation amount calculation circuit 23 performs an adjustment for setting the volume to the target value from the result of the subtraction of the measured value of the circuit to be adjusted 5 and the target value by the subtractor 22 at this time. The rotation amount of the bit 11, that is, the rotation amount of the motor 7 is calculated, and the rotation amount is sent to the control unit 20 and the motor control circuit 4 (step 36 in FIG. 3). The adjustment number counting unit 26 is notified.

When receiving the rotation amount of the adjustment bit 11 from the rotation amount calculation circuit 23, the control unit 20 instructs the motor control circuit 4 to rotate the motor 7 by an amount corresponding thereto.

When the motor 7 rotates under the control of the motor control circuit 4 to rotate the adjustment bit 11 by a predetermined amount, the adjustment bit 11
The rotation of 11 adjusts the volume near the target value.
(Step 37 in FIG. 3).

The motor 7 rotates by a predetermined amount and stops under the control of the motor control circuit 4. At this time, if the adjustment bit 11 is pulled up as it is, the adjustment value changes due to the restoring force such as the elasticity of the volume. Motor 7 in motor control circuit 4
The motor 7 is rotated in the reverse direction under the control of the motor control circuit 4 to return the adjustment bit 11 by a predetermined amount in the direction opposite to that during adjustment, and the volume output is measured again (third). Figure 39).

At this time, the first adjustment is counted by the adjustment number counting section 26 based on the notification from the rotation amount calculation circuit 23 and the comparator 25, and the count value “1” is sent to the control section 20. Therefore, the control unit 20 recognizes that this is the first adjustment (third adjustment).
In step 38), the adjustment bit 11 is returned by a predetermined amount, and the volume output is measured again.

The first adjustment is temporarily completed by the above-described processing operation, and if the volume output of the adjusted circuit 5 falls within the allowable range of the target value by this adjustment (step 4 in FIG. 3).
0), the control unit 20 notifies the motor control circuit 3 of a drive instruction to the motor 6, and the motor control circuit 3 controls the motor 6
Is rotated to raise the adjustment unit 10 by a predetermined amount by the slide mechanisms 8 and 9, and the adjustment of the adjusted circuit 5 with respect to the volume is completed (step 41 in FIG. 3).

However, when the volume output of the circuit to be adjusted 5 does not fall within the allowable range of the target value due to the influence of the restoring force or the like, the rotation amount of the adjustment bit 11 required to set the volume again to the target value is calculated by the rotation amount calculation. The calculation is performed by the circuit 23 (step 36 in FIG. 3), and the volume output is adjusted by rotating the adjustment bit 11 in the same manner as described above (steps 37 to 40 in FIG. 3).

At this time, the adjustment number counting unit 26 counts the second adjustment based on the notification from the rotation amount calculation circuit 23, and sends the count value “2” to the control unit 20, so that the control unit 20 performs the second adjustment. Recognize that there is, that is, readjustment (third
In FIG. 38, the adjustment bit 11 is returned by an amount smaller than the previous adjustment bit 11 return amount, that is, the return amount corresponding to the number of adjustments, and the volume output is measured again (FIG. 3 step 42).

As a result, each time the readjustment is repeated, the measured value of the adjusted volume output becomes closer to the allowable range of the target value,
The adjustment accuracy can be improved, and the time for adjustment by the operator can be reduced by performing the adjustment automatically.

As described above, when it is detected that the tip of the adjustment bit 11 is coupled to the groove of the adjustment screw of the volume of the circuit 5 to be adjusted, the tip of the adjustment bit 11 is slightly raised, and then the By adjusting the volume and returning the adjusting bit 11 after the adjustment by a predetermined amount set in a direction opposite to the direction being adjusted, and gradually reducing the return amount from the predetermined amount according to the number of adjustments. The adjustment of the circuit to be adjusted 5 can be automatically performed until the measured value of the adjusted volume output falls within the allowable range of the target value, and it is not necessary to repeat the adjustment by the operator. Time can be reduced.

In addition, since the adjustment bit 11 is returned in the opposite direction to that during the adjustment, and the amount of the return is sequentially reduced according to the number of adjustments, the adjustment accuracy can be improved.

In the embodiment of the present invention, the adjustment of the volume on the circuit 5 to be adjusted has been described. However, if the adjustment by the adjustment bit 11 is possible, it is apparent that the present invention can be applied to the adjustment of other circuit components. It is not limited to.

Effects of the Invention As described above, according to the present invention, when it is detected that the tip of the adjustment bit is fitted in the adjustment groove of the object to be adjusted,
The adjustment bit is adjusted by raising the tip of the adjustment bit by a predetermined amount, and then the adjustment bit is returned by a predetermined amount in the opposite direction to that during adjustment, and the return amount is sequentially reduced according to the number of adjustments. By doing so, there is an effect that the adjustment is automatically performed, the time for the adjustment can be reduced, and the adjustment accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a configuration diagram of one embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of one embodiment of the present invention. Description of Signs of Main Parts 1 Probe 2 CPU 3 4 Motor control circuit 6 7 Motor 10 Bit adjustment unit 11 Adjustment bit 20 Control unit 22 Subtractor 23 Rotational speed calculation circuit 24 Register 25 Comparator 26 Adjustment frequency counting unit

Claims (1)

(57) [Claims] 1. A precision adjusting machine for adjusting an object to be adjusted by fitting a tip end of an adjusting bit into an adjusting groove of an object to be adjusted, and rotating the adjusting bit by a driving means to adjust the object to be adjusted. Measuring means for measuring the output of the body, detecting means for detecting that the tip of the adjustment bit is fitted in the adjusting groove based on the measurement result of the measuring means, and adjusting groove at the tip of the adjusting bit by the detecting means Means for raising the tip of the adjusting bit by a predetermined amount when the fitting of the adjusting bit is detected, and adjusting the object to be adjusted by rotating the driving means, and then rotating the driving means. A reverse rotation driving means for rotating and driving by a predetermined amount set in advance in the direction opposite to the direction, and adjusting the object to be adjusted to a preset target value according to a measurement result of the measurement means. Control means for controlling a moving means, and controlling the amount of driving by the reverse rotation driving means to gradually decrease from the predetermined amount according to the number of adjustments of the object to be adjusted by the rotational driving of the driving means. A precision adjustment machine characterized by the following.