JP3335443B2 - Automatic positioning control method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically positioning and controlling a slider of a vertical feeder or a horizontal feeder and a device therefor. For example, a vertical feeder used in a surface roughness measuring instrument and a contour measuring instrument. The present invention relates to an automatic positioning control method suitable for an apparatus and a horizontal feeder, and an apparatus therefor.

[0002]

2. Description of the Related Art In a surface roughness measuring device, an object to be measured (hereinafter referred to as "object to be measured") is used.
"Work". After the stylus is brought into contact with the surface of (1), the stylus is moved to detect a change in the work surface. FIG. 3 is a diagram showing the configuration of a general surface roughness measuring device and the inside of a vertical feed device, and FIG. 4 is a sectional view taken along line AA of FIG. FIG.
4 and FIG. 4, a vertical feed device 11 is provided upright on a base 30, and a slider 41 projects from the vertical feed device 11 to be vertically movable. A detector feed device 46 is supported on the slider 41, and a slider 47 protrudes from the detector feed device 46 so as to be movable in a horizontal direction (a direction perpendicular to the paper surface of FIG. 3). Further, a detector holder 48 is attached to the slider 47, and a stylus 49 is attached to the detector holder 48.
A detector 49 having a.

When the surface roughness of the work 50 is measured by such a configuration, the stylus 49a is first adjusted to an optimum height in terms of the measurement accuracy by the vertical feeder 11, and then the stylus 4 is measured.
9a is moved along the surface of the work 50 in a direction perpendicular to the plane of FIG. The change in the contact position at this time indicates the surface roughness. The configuration of the contour shape measuring device is substantially the same except for the detector, and the vertical feeder 11 is the same, so that illustration and description are omitted.

FIG. 8 is a block diagram showing the overall structure of the vertical positioning device. The vertical positioning device 11 includes an input unit 12 for inputting a feed amount and a drive control unit 15 for controlling a driving mechanism of the vertical feeding device 11. It is configured.

Next, the vertical feed device 11 will be described in detail.
A V-shaped slide guide 31b is formed at the front (left side in FIGS. 3 and 4) of the column 31, and a flat slide guide 31c is formed at the rear. A V-shape is formed at the front part of the slider 41 similarly to the slide guide 31b, and a shaft part 42 is provided at the rear part of the slider 41. The nut 45 is attached, and the slide plate 43 is pressed against the slide guide 31c by the disc spring 44. As a result, the slider 41 slides against the slide guide 31b against the mass W of the detector feeder 46 and the like attached to the slider 41.
, And can be moved up and down accurately along the slide guide 31b.

Bearings 31a and 32a are formed in the lower portion of the column 31 and the upper plate 32 of the column.
The upper and lower shaft portions 37a and 37b are fitted together, and two thrust bearings 33 are inserted into the shaft portion 37a with the column upper plate 32 interposed therebetween, and are held on the column upper plate 32 by nuts 34. ing. by this,
The feed screw 37 is immovable in the vertical direction and rotatable in the horizontal direction. The feed screw 37 has a feed nut 3
8, the feed nut 38 is loosely inserted vertically between the joints 41a and 41b of the slider 41, and the rotation in the horizontal direction is restricted by a detent 39 attached to the joint 41b. . Furthermore, column upper plate 3
A motor and a transmission mechanism (details not shown) are provided on the upper part 36 of the second unit.
The gear 35 fixed to the upper end of the feed screw 37 is rotated by a motor. With such a configuration, the rotation of the motor is transmitted to the feed screw, and the feed nut is driven to drive the slider 41 up and down.

[0007]

However, since the slider 41 sandwiches the slide guides 31b and 31c back and forth, the slider 41 and the slide guides 31b and 3c
1c, frictional forces F1 and F2 are generated.
When the detector feed device 46 is sent upward, the frictional force F
1 and F2 are the feed nut 38, the feed screw 37, the column upper plate 32, etc., and the upper joint portion 41a of the slider 41 (hereinafter, the feed nut 38, the feed screw 37, the column upper plate 32, etc., and the joint portion 41a are collectively referred to as "drive". Acting on the mechanism component), the drive mechanism component is displaced downward by X amount. Next, when the motor is stopped, the frictional forces F1 and F2 are eliminated, so that the amount X of the drive mechanism component displaced by the frictional forces F1 and F2 gradually recovers upward. The same applies to the case where the detector feed device 46 is fed downward. When the device feed is stopped after stopping, the amount X displaced by the frictional forces F1 and F2 of the drive mechanism component gradually recovers downward.

The vertical position of the detector feeder 46 is a reference for the measured surface roughness. If the vertical position fluctuates during the measurement, accurate measurement cannot be performed. Therefore, as shown in the flow chart of FIG. 9, after the detector feeding device 46 has been sent upward or downward (steps 71, 72, 73), the driving mechanism components have frictional forces F1 and F
Wait until the amount X displaced by 2 is restored (Step 7
The measurement must be performed from step 4) (step 75), which causes a problem that the efficiency of the measurement is reduced. Further, after the detector feeding device 46 is sent upward or downward (steps 71, 72, 7).
3) When measuring immediately, it is necessary to use a magnification that does not affect the displacement X, and there is a problem that high-magnification measurement cannot be performed.

The present invention has been made in view of such circumstances, and even if the vertical position of the detector feed device 46 supported by the vertical feed device 11 is adjusted, the vertical position of the detector feed device 46 is adjusted. It is an object of the present invention to provide a vertically positioning control method and device which are immediately stable.

[0010]

A feed device for moving a slider along a slide base by a driving mechanism, an input section for inputting a feed amount of the slider, and a drive generated when the slider is fed by a desired feed amount. A storage unit for previously inputting and storing a displacement amount of a mechanism component as a correction amount, a calculation unit for calculating a total feed amount and a feed direction from a target feed amount of the slider and a displacement amount of a drive mechanism component, and the calculation unit A drive control unit that controls the drive mechanism of the slider according to the signal of (a), the target feed amount of the slider and a preset displacement amount of the drive mechanism component generated when the slider is fed by the target feed amount. After the total feed amount is calculated and the slider is fed by the total feed amount, the slider is immediately fed in the opposite direction by the displacement amount of the drive mechanism component to perform positioning.

Alternatively, a feeder for feeding the slider along a slide base by a drive mechanism, a displacement detection sensor provided on a drive mechanism component of the feeder, and an input unit for inputting a target feed amount of the slider. A detecting unit for detecting a displacement amount of a driving mechanism component of the feeder; a calculating unit for calculating a feed amount and a feed direction of the slider based on signals from the input unit and the detecting unit; and a signal from the calculating unit. A drive control unit for controlling a drive mechanism of the slider, wherein the displacement of the drive mechanism component generated when the slider is moved is detected successively, and the displacement of the drive mechanism component is equal to or greater than a predetermined value. When the displacement of the drive mechanism component is less than or equal to a predetermined value, the slider is moved forward to move the slider in a predetermined position. To position.

[0012]

According to the present invention, even if the drive mechanism component is displaced by the frictional force between the slide base and the slider, the slider is fed so as to eliminate the displacement or to prevent the displacement from occurring. Even if the vertical position of the detector feeding device supported by the slider is adjusted, the vertical position of the detector feeding device is stabilized immediately after the adjustment.

[0013]

【Example】

Embodiment 1 FIG. 1 is a block diagram showing the overall configuration of a vertical positioning device according to Embodiment 1 of the present invention. The vertical feeder 11 is shown in FIG.
Is the same as that shown in FIG. In FIG. 1, the input unit 12
Inputs the target feed amount of the slider 41. Storage unit 13
Inputs and stores the correction amount, that is, the displacement amount X of the drive mechanism component caused by the frictional force when the slider 41 is fed. The arithmetic unit 14 performs a predetermined arithmetic operation based on the values output from the input unit 12 and the storage unit 13 and the signal from the drive control unit 15, and outputs a feed amount and a feed direction. The drive control unit 15 controls a drive mechanism of the vertical feed device 11 based on a signal output from the calculation unit 14.

Next, a positioning method will be described. FIG. 2 is a control flowchart of the positioning method according to the first embodiment of the present invention. The feed amount of the slider 41 is the input unit 1
2 (step 21), the input feed amount and the correction amount previously stored in the storage unit 13 are sent to the calculation unit 14, where both amounts are calculated, and the calculation unit 14 sends the total amount to the drive control unit 15. The feed amount (a value obtained by adding the feed amount and the correction amount) and the feed direction are output. The drive control unit 15 controls the drive mechanism of the vertical feed device based on this signal, the feed screw 37 rotates, and the slider 41 is fed by the total feed amount in the target direction (forward direction) (step 22). When the feed screw 37 rotates by an amount corresponding to the total feed amount, the feed screw 37 stops rotating (step 23), and a signal indicating that the feed screw has stopped rotating is sent from the drive control unit 15 to the arithmetic unit 14
Is output from the calculation unit 14 to the drive control unit 15, the feed amount corresponding to the correction amount and the feed direction opposite to the previous one are output.
The drive controller 15 rotates the feed screw 37 in the direction opposite to the front by this signal, and the slider 41 is fed in the direction opposite to the front by the correction amount (step 24). By being sent in the opposite direction, the drive mechanism components of the vertical feeder are driven by frictional forces F1 and F2.
Since the displacement X is restored, the measurement can be started (step 26) immediately after the slider 41 stops (step 25).

Second Embodiment FIG. 5 is a partial detailed view of a vertical feeder according to a second embodiment of the present invention. In the second embodiment, a sensor 51 (for example, a strain gauge or the like) for detecting the amount of displacement of the drive mechanism component of the vertical feeder (eg, the upper joint portion 41a of the slider 41) is attached to the portion where the displacement is large. Other parts of the vertical feed device 11 are the same as those shown in FIG.

In FIG. 6, an input unit 12 inputs a target feed amount of the slider 41. The detecting unit 17 detects a displacement amount from a sensor 51 that detects a displacement amount attached to a drive mechanism component of the vertical feeder. The drive control unit 15 controls the drive mechanism of the up-down feed device 11 based on the signal output from the calculation unit 16, and sends the amount (including the direction)
Is output to the calculation unit 16. The calculation unit 16 performs a predetermined calculation based on signals output from the input unit 12, the detection unit 17, and the drive control unit 15, and outputs the feed amount and the feed direction to the drive control unit 15.

FIG. 7 shows a control flowchart for positioning according to the second embodiment. When the feed amount of the slider 41 is input to the input unit 12 (step 61), the input feed amount is sent to the arithmetic unit 16, and the arithmetic unit 16 outputs the feed amount and the feed direction to the drive control unit 15. The drive control unit 15 controls the drive mechanism of the vertical feed device based on this signal, the feed screw 37 rotates, and the slider 41 moves in the target direction (forward direction).
(Step 62). When the feed screw 37 rotates and the slider 41 is fed in the target direction (forward direction), the displacement of the drive mechanism component is input from the detection unit 17 to the calculation unit 16 (step 63). Is greater than or equal to a predetermined amount, the feed amount and the feed direction (a direction opposite to the previous direction) are output to the drive control unit 15 so that the displacement amount becomes equal to or less than a predetermined value. Thus, the drive control unit 15 controls the drive mechanism of the vertical feed device, rotates the feed screw 37, and feeds the slider 41 in the opposite direction to the front (step 64). The calculating section 16 calculates the signal of the sent amount (including the direction) always output from the drive control section 15 (step 65). If the fed amount does not reach the target, the shortage of the fed amount and the feeding direction are drive-controlled. Part 15
Output to By repeating this, the slider 41 is fed by a target feed amount while tracking the displacement amount of the drive mechanism component to be equal to or less than a predetermined value. Therefore, measurement can be started (step 67) immediately after the slider 41 is stopped (step 66). .

In the first and second embodiments, the drive mechanism of the vertical feeder rotates the feed screw by driving the motor to drive the feed nut. However, the present invention is not limited to this. , Belt feed, rack feed, cylinder feed, linear motor feed, or the like.
Further, in the above description, the automatic positioning control method of the slider of the vertical feeder and its device have been described, but the present invention is not limited to this, and the present invention is also applicable to the automatic positioning control method of the slider of the horizontal feeder and its device.

[0019]

As described above, according to the automatic positioning control method and apparatus according to the present invention, even if the drive mechanism component is displaced by the frictional force between the slide base and the slider, the displacement is eliminated. Alternatively, since the slider is fed so that no displacement occurs, it is possible to provide an automatic positioning control method and an automatic positioning control method capable of stabilizing the position of the slider immediately after the adjustment even if the position of the slider of the feed device is adjusted.

[Brief description of the drawings]

FIG. 1 is a block diagram of an automatic positioning control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart of an automatic positioning control method according to the first embodiment of the present invention;

FIG. 3 is a diagram showing a configuration of a general surface roughness measuring device and an inside of a vertical feed device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partial view of a vertical feed device according to a second embodiment of the present invention.

FIG. 6 is a block diagram of an automatic positioning control device according to a second embodiment of the present invention.

FIG. 7 is a flowchart of an automatic positioning control method according to a second embodiment of the present invention.

FIG. 8 is a block diagram of a conventional automatic positioning control device.

FIG. 9 is a flowchart of a conventional automatic positioning control method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vertical feeder 12 Input part 13 Storage part 14 Operation part 15 Drive control part 31 Column 31b, c Slide guide 37 Feed screw 38 Feed nut 41 Slider 41a Upper joint part 46 Detector feeder 51 Sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23Q 15/00-15/28 G05B 19/18-19/46 G05D 3/00-3/12

Claims (4)

(57) [Claims] 1. A device for feeding a slider along a slide base by a driving mechanism and positioning the slider at a predetermined position, comprising: a predetermined driving mechanism which is generated when a target feeding amount of the slider and a target feeding amount of the slider are fed. It calculates the total feeding amount obtained by adding the displacement amount of the components, after the slider has sent the total feed amount, the drive mechanism part immediately sent only in the opposite direction displacement amount of the drive mechanism part
An automatic positioning control method characterized by restoring the displacement amount of the object. Wherein a feeder slider is fed along the slide base by the drive mechanism, an input unit for inputting the feeding amount of interest of the slider, a drive mechanism that occurs when the slider sent feed quantity of the object If it enters Tomo the amount of displacement of the components in advance as a correction amount
Stored in a storage unit, the displacement of the drive mechanism components stored in the storage unit and the feed amount of the objects of the slider which is input from the input unit
Calculate the total feed amount by adding
Direction, and the driving device is driven by a signal from a driving control unit.
A calculation unit for outputting the displacement amount and the reverse feed direction of the structural component; the total feed amount and the forward feed method output from the calculation unit
Direction , the slider is moved forward by the total feed amount.
After sending the outputs a signal to the arithmetic unit, or the arithmetic unit
Displacement and reverse feed of the drive mechanism parts output from the
The direction signal immediately reverses the displacement of the drive mechanism parts.
To restore the displacement of the drive mechanism parts
An automatic positioning control device, comprising: the drive control unit that controls the driving. 3. A device for feeding a slider along a slide base by a driving mechanism and positioning the slider at a predetermined position, wherein the displacement of the driving mechanism component caused when the slider is moved is detected successively, When the displacement amount is equal to or greater than a predetermined value, the slider is moved in a reverse direction, and when the displacement amount of the drive mechanism component is equal to or less than a predetermined value, the slider is moved in a forward direction to move the slider in a predetermined direction. An automatic positioning control method characterized by positioning at a position. 4. A feeding device for feeding a slider along a slide base by a driving mechanism, a displacement detection sensor provided on a driving mechanism component of the feeding device, and an input unit for inputting a desired feeding amount of the slider. A detection unit that detects a displacement amount of a drive mechanism component of the feed device; a calculation unit that calculates a feed amount and a feed direction of the slider based on signals from the input unit and the detection unit; and a signal from the calculation unit. An automatic positioning control device, comprising: a drive control unit that controls a drive mechanism of the slider.