JP2007227491A - Feeder adjuster and tape feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape feeder and a feeder adjuster for adjusting the stop position of a tape after pitch feeding without being influenced by machining precision of a tape feed mechanism. <P>SOLUTION: In the tape feeder 4 comprising a motor 24 performing pitch feeding of a tape through index rotation of a sprocket 23 by a reduction mechanism 25 consisting of such a gear train as the reduction ratio to the driven gear of the sprocket 23 becomes an integer multiple, correction amount of the sprocket 23 for every absolute rotation angle is prepared as a correction amount table, and driving of the motor 24 is feedforward controlled based on the correction amount thus adjusting the stop position of a tape after pitch feeding to become a reference stop position. Consequently, the stop position of a tape after pitch feeding can be adjusted with high precision without being influenced by mechanismic precision even in case of the reduction mechanism 25 using gears of relatively low machining precision. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tape feeder that is mounted on an electronic component mounting apparatus and supplies electronic components, and a feeder adjustment device that adjusts a stop position of a tape that is pitch-fed in the tape feeder.

The tape feeder has a function of pitch-feeding a tape containing electronic parts at an equal pitch and sequentially supplying the electronic parts to a predetermined pickup position. The electronic parts supplied to the pickup position are Picked up by the transfer head and mounted on a mounting object such as a substrate. 2. Description of the Related Art As a tape feeding mechanism in a tape feeder, a mechanism including a sprocket that engages with a feed hole provided at an equal pitch in a tape and a motor that rotates the sprocket with an index is known (see Patent Document 1). In this device, the rotating disk and sprocket directly connected to the motor are connected by an endless belt, and the drive of the motor is controlled based on the encoder value for detecting the rotation angle of the rotating disk, and the stop position of the tape after pitch feeding is adjusted. As a result, the electronic component is supplied to a predetermined pickup position.
JP-A-10-139272

  However, since the tape feeding mechanism configured as described above is composed of a plurality of drive mechanisms, an inherent processing accuracy error for each upstream drive mechanism is added to the rotational accuracy of the sprocket located on the most downstream side of the tape feed mechanism. It appears as a stack. Therefore, in an apparatus for controlling the drive of the upstream drive mechanism as disclosed in Patent Document 1, when the processing accuracy of the plurality of drive mechanisms constituting the tape feed mechanism is not high accuracy, It is difficult to adjust the stop position to be a predetermined pickup position. On the other hand, if the processing accuracy of each drive mechanism is made high, there is a problem that the cost increases.

  Therefore, an object of the present invention is to provide a feeder adjusting device and a tape feeder that adjust the stop position of a tape after pitch feeding without being affected by the processing accuracy of the tape feeding mechanism.

According to the first aspect of the present invention, there is provided a sprocket provided on the circumference with engaging portions that engage with feed holes provided at an equal pitch on the tape, an encoder that detects an absolute rotation angle of the sprocket, and the sprocket. A driving means for index-rotating the sprocket by a speed reduction mechanism comprising a gear train in which the reduction ratio with the driven gear provided is an integer multiple, respectively, and correcting the driving amount of the driving means. A feeder adjusting device for calculating a correction amount of the driving amount of the driving means in a tape feeder comprising a feeder control means for adjusting a stop position after pitch feeding of the tape, and stopping after the tape pitch feeding Measuring means for measuring a position or a stop position after index rotation of the sprocket, and detected by the encoder From the absolute rotation angle of the sprocket and the error between the stop position after pitch feeding of the tape measured by the measuring means or the stop position after index rotation of the sprocket and the reference stop position, the absolute value of the sprocket for each absolute rotation angle of the sprocket. Calculating means for calculating an error; storing means for storing the error for each absolute rotation angle of the sprocket calculated by the error calculating means as an error table; and calculating the absolute value of the sprocket from the error table stored in the storing means. Calculation means for calculating a correction amount for each rotation angle, and transmission means for transmitting the correction amount for each absolute rotation angle of the sprocket calculated by the calculation means to a feeder control means provided in the tape feeder as a correction amount table. And with.

  According to a second aspect of the present invention, there is provided a reduction ratio of a sprocket that engages with a feed hole provided at an equal pitch on a tape, an encoder that detects an absolute rotation angle of the sprocket, and a driven gear provided in the sprocket. A feeder adjustment method for adjusting a stop position after pitch feeding of the tape in a tape feeder having a driving means for index-rotating the sprocket by a speed reduction mechanism comprising a gear train each of which is an integral multiple, wherein the sprocket makes one rotation A measuring step for measuring a stop position after pitch feeding of the tape or a stop position after index rotation of the sprocket during the measurement, and an absolute rotation angle of the sprocket detected by the encoder and the measurement measured in the measuring step. Stop position after pitch feed of tape or the spro A calculation step of calculating the error for each absolute rotation angle of the sprocket from the error between the stop position after index rotation of the robot and the reference stop position, and for each absolute rotation angle of the sprocket from the error calculated in the calculation step. And a transmitting step of transmitting the correction amount for each absolute rotation angle of the sprocket calculated in the calculating step to a feeder control means provided in the tape feeder as a correction amount table. .

  According to a third aspect of the present invention, there is provided a sprocket provided on the circumference with engaging portions that engage with feed holes provided at an equal pitch on the tape, an encoder that detects an absolute rotation angle of the sprocket, and the sprocket. A driving means for index-rotating the sprocket by a speed reduction mechanism comprising a gear train in which the reduction gear ratio with the driven gear provided is an integral multiple, respectively, and correcting the drive amount of the driving means. Measuring means for measuring a stop position after pitch feeding of the tape or a stop position after index rotation of the sprocket. And the absolute rotation angle of the sprocket detected by the encoder and the measurement means measured by the measurement means A calculating means for calculating the error for each absolute rotation angle of the sprocket from an error between a stop position after pitch feed of the loop or a stop position after index rotation of the sprocket and a reference stop position; and calculating by the error calculating means Storage means for storing the error for each absolute rotation angle of the sprocket as an error table, and calculation means for calculating a correction amount for each absolute rotation angle of the sprocket from the error table stored in the storage means. The drive amount of the drive means is corrected based on a correction amount for each absolute rotation angle of the sprocket that is calculated in advance in the feeder adjustment device provided.

  According to the feeder adjusting device and the feeder adjusting method of the present invention, the sprocket is index-rotated by the speed reduction mechanism comprising a gear train in which the reduction ratio with the driven gear provided in the sprocket is an integral multiple, and the pitch of the tape is fed. For tape feeders equipped with drive means, the correction amount for each absolute rotation angle of the sprocket is created as a correction amount table, and the tape is stopped after pitch feeding by feedforward control of the drive means based on this correction amount. Since the position is adjusted to the reference stop position, the tape stop position after pitch feeding can be increased without being affected by the mechanical accuracy, even with a speed reduction mechanism that uses gears with relatively low machining accuracy. It becomes possible to adjust the accuracy.

  Further, according to the tape feeder of the present invention, the stop position of the tape after pitch feeding is set to the reference stop position by performing feedforward control of the drive of the sprocket driving means based on the correction amount table created in the feeder adjusting device. Therefore, even with a speed reduction mechanism that uses gears with relatively low machining accuracy, the tape stop position after pitch feeding can be adjusted with high accuracy without being affected by the mechanical accuracy. It becomes possible.

  An embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing the configuration of an electronic component mounting apparatus according to an embodiment of the present invention, FIG. 2 is a side view showing the configuration of a tape feeder according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4A, FIG. 4B, and FIG. 4C are explanatory diagrams showing the detected portion of the encoder according to the embodiment of the present invention, and FIG. 6 is a block diagram showing a control system of the tape feeder and feeder adjusting apparatus of the embodiment, FIG. 6 (a) is an explanatory diagram schematically showing an error table of one embodiment of the present invention, and FIG. 6 (b) is a diagram of the present invention. FIG. 6C is a diagram illustrating the correction amount table of one embodiment, FIG. 6C is a diagram illustrating the correction amount table of one embodiment of the present invention, and FIG. 7 is a diagram of one embodiment of the present invention. It is a flowchart which shows a feeder adjustment method.

  First, the overall configuration of an electronic component mounting apparatus according to an embodiment of the present invention will be described. In FIG. 1, a substrate transfer device 3 that transfers a substrate 2 is disposed on a base 1. The substrate transfer device 3 is provided with a clamp mechanism, and the loaded substrate 2 is positioned and held at a predetermined position. In the present invention, the transport direction of the substrate 2 is the X direction, and the direction perpendicular to the substrate 2 in the horizontal plane is the Y direction.

  A plurality of tape feeders 4 which are electronic component supply devices are disposed on the side of the substrate transport device 3 in the Y direction. The tape feeder 4 is held by a carrier 5 and can be attached to and detached from the base 1 by an operator operating a handle 6 mounted on the carrier 5. A tape reel 7 is mounted on the carrier 5, and a tape 8 storing electronic components at an equal pitch is wound around the carrier 5.

  A transfer head 10 is disposed above the base 1 so as to be horizontally movable in the XY directions. A plurality of nozzle units 11 are mounted on the transfer head 10. Under each nozzle unit 11, a nozzle 12 that sucks an electronic component can move up and down in the Z direction and rotate in the θ direction (around the Z axis). It is attached to. Between the substrate transport device 3 and the tape feeder 4, a camera 13 that is an imaging means for imaging an electronic component sucked by the nozzle is disposed. The nozzle 12 that picks up the electronic component supplied from the tape feeder 4 moves above the substrate 2 via the camera 13, and performs image processing on the image of the electronic component captured by the camera 13. As a result, the position and posture of the electronic component attracted by the nozzle 12 are recognized, and after adjusting the position and rotation angle of the nozzle 12 based on the recognition result, a predetermined mounting posture on the substrate 2 is mounted. Mount electronic components with.

  Next, the structure of the tape feeder 4 in one embodiment of the present invention will be described. In FIG. 2, the tape feeder 4 has a function of performing a feeding operation of the tape 8 inside the outer frame 20 and pitch-feeding the electronic components stored in the tape 8 at an equal pitch to the supply port 21. A tape feeding mechanism 22 is disposed at the tip of the outer frame 20. The tape feed mechanism 22 includes a sprocket 23 having an engagement portion 23a formed on the outer periphery thereof that engages with a feed hole 8a formed at an equal pitch in the feed direction of the tape 8, and a motor 24 that is a rotation driving means of the sprocket 23. The transmission mechanism 25 transmits the rotational drive of the motor 24 to the sprocket 23, and the feeder control unit 26 controls the rotational drive of the motor 24. The feeder control unit 26 includes a storage area 26a, and stores various data such as a control program and an electronic component storage pitch.

When the motor 24 is controlled to rotate intermittently according to the electronic component storage pitch, the sprocket 23 performs index rotation, and the tape 8 wound around the tape reel 7 enters the outer frame 20 from the rear end. Pulled in and pitched to the tip. Thereby, the electronic components accommodated in the tape are sequentially supplied to the supply port 21. The supply port 21 is formed in an opening in a part of a tape guide 28 that is attached to the upper part of the outer frame 20 and guides the feeding of the tape 8. A part of the tape guide 28 becomes a folded portion of the cover tape 8 b peeled off from the surface of the tape 8, and the cover tape 8 b is peeled off from the surface of the tape 8 by the cover tape peeling mechanism 29. Thus, the electronic component is supplied to the supply port 21 in an exposed state and picked up by the nozzle 12 positioned above the supply port 21.

  In FIG. 2, an encoder 27 that detects the absolute rotation angle of the sprocket 23 is attached to the sprocket 23. In FIG. 3, an encoder 27 analyzes a pattern forming surface 27a provided on the side surface of the sprocket 23, a sensor 27b for detecting the uneven pattern formed on the pattern forming surface 27a, and the uneven pattern detected by the sensor 27b. The absolute angle detection unit 27c for detecting the absolute rotation angle of the sprocket 23 is included, and the absolute angle recognition unit 27c is included in the feeder control unit 26.

  On the pattern forming surface 27a, different concavity and convexity patterns are formed on six concentric circles with different diameters centering on the rotation shaft 23b of the sprocket 23, and the distance between the concavities and convexities increases from the inner concentric circle toward the outer side. To change. As a result, the combination of the six irregularities positioned on the recognition line a is different for each rotation angle of the sprocket 23.

  The sensor 27b is fixed at a predetermined distance from the pattern formation surface 27a at a position (indicated by a dotted line) facing the pattern formation surface 27a on the recognition line a, and has six concentric irregularities with different diameters. Six photo sensors 27d for detection are provided. The photo sensor 27d detects that either the concave portion or the convex portion is located at a position facing the photo sensor 27d by detecting the distance from the pattern forming surface 27a serving as the detected portion. Detection signals from the six photosensors 27d are transmitted to the diagonal detector 27c, and the absolute rotation angle of the sprocket 23 is detected by a combination of the six concavo-convex patterns.

  In addition, the thing of a various aspect can be used for the pattern formed in the pattern formation surface 27a and the sensor 27b which detects this pattern. For example, as a device using an optical sensor such as the photosensor 27d, a transmissive type can be used in addition to the reflective type. In this case, pattern holes are formed on the pattern forming surface 27a or materials having different reflectivities are arranged in a pattern, and the sprocket 23 is changed to a different mode for each absolute rotation angle. When a magnetic sensor is used, a magnetic pattern that changes the magnetic strength or changes the magnetic field for each absolute rotation angle of the sprocket 23 is formed on the pattern forming surface 27a. Furthermore, in the case of using an electrostatic sensor, an electrostatic pattern that changes the capacitance or changes the electric field for each absolute rotation angle of the sprocket 23 is formed on the pattern forming surface 27a. Furthermore, a material having different electrical resistance values is arranged in a pattern on the pattern forming surface 27a, and the absolute rotation angle of the sprocket 23 is detected by detecting a change in current or voltage of an electric circuit in contact with the material. It is also possible.

  Moreover, it does not ask | require whether the pattern formation surface 27a is integrally formed in the side surface of the sprocket 23, or the pattern formation surface 27a previously formed is attached to the side surface of the existing sprocket 23. As shown in FIG. 4A, when the pattern forming surface 27a is integrally formed on the side surface of the sprocket 23, irregularities and pattern holes are formed at the same time when the sprocket 23 is manufactured. It can be formed by directly processing the side surface. When the pattern forming surface 27a is attached to the side surface of the existing sprocket 23, it may be directly attached to the side surface 23c of the sprocket 23 as shown in FIG. If it does, as shown in FIG.4 (c), you may mount | wear with the side surface 23c of the sprocket 23 via the spacer 23d.

Thus, the pattern forming surface 27a that changes in a different manner for each rotation angle of the sprocket 23 is provided so as to rotate in synchronization with the sprocket 23, and the pattern forming surface 27a is provided.
Since the absolute rotation angle of the sprocket is detected based on this aspect, it is not necessary to connect a rotation angle detecting disk or the like to the tape feeding mechanism 22 and incorporate it, and the absolute rotation angle of the sprocket 23 is highly accurate with a small space. Can be detected.

  In FIG. 5, the transmission mechanism 25 includes a drive gear 25 a attached to the rotation shaft of the motor 24, a first intermediate gear 25 b, a second intermediate gear 25 c, and a driven gear 25 d attached to the rotation shaft of the sprocket 23. It is composed of columns. The first intermediate gear 25b and the second intermediate gear 25c are respectively formed with a first small gear 25e and a second small gear 25f. The drive gear 25a and the first intermediate gear 25b are paired, and the first small gear 25e. And the second intermediate gear 25c are paired, and the second small gear 25f and the driven gear 25d are paired. The number of teeth is set in each of the three gear trains to be a pair so that the reduction ratio becomes an integer, and the drive gear 25a and the first intermediate gear 25b (the first small gear) are rotated while the sprocket 23 makes one revolution. The gear 25e) and the second intermediate gear 25c (second small gear 25f) are each rotated a plurality of times. For example, the number of teeth Za of the drive gear 25a is 10, the number of teeth Zb of the first intermediate gear 25b is 40, the number of teeth Zc of the second intermediate gear 25c is 40, the number of teeth Zd of the driven gear 25d is 100, and the first small gear When the number of teeth Ze of 25e is 10 and the number of teeth Zf of the second small gear 25f is 20, the reduction ratio in the first row is Zb / Za = 4, and the reduction ratio in the second row is Zc / Ze = 4. The reduction ratio in the third row is Zd / Zf = 5 (the final reduction ratio is 4 × 4 × 5 = 80). That is, the second intermediate gear 25c (second small gear 25f) rotates five times, the first intermediate gear 25b (first small gear 25e) rotates 20 times, and the drive gear 25a rotates 80 times while the sprocket 23 rotates once. To do.

  Generally, there is a dimensional error due to machining accuracy in a gear, and in a gear train composed of a plurality of gears, the error of each gear is accumulated, so that there is a gap between the rotation angle of the driving gear and the rotation angle of the driven gear. The correlation cannot be grasped. However, as described above, when the intermediate gear or drive gear paired with the driven gear has a rotational speed that is an integral multiple of the rotational speed of the driven gear, the error of the intermediate gear or the drive gear during one rotation of the drive gear. Therefore, the error for each absolute rotation angle of the drive gear is repeated in one rotation cycle.

  Next, a feeder adjustment device according to an embodiment of the present invention will be described. In the tape feeder 4, when electronic components housed in the tape 8 at an equal pitch are sequentially supplied to the supply port 21, the stop position of the tape 8 or the sprocket 23 for each pitch feed is set so that the feed position does not vary. It needs to be adjusted accurately. Therefore, the feeder adjustment device calculates the correction amount of the driving amount of the motor 24 for adjusting the stop position after pitch feeding in the tape feeder 4, and based on the calculation result, the feeder provided in the tape feeder 4 The control unit 26 controls the drive amount of the motor 24.

  In FIG. 5, a feeder connection portion 32 is provided on the tape feeder 4 side and is connected to the feeder control portion 26. A feeder adjustment device connection unit 33 is provided on the feeder adjustment device side, and is connected to the feeder adjustment device control unit 31. When the tape feeder 4 is mounted at a predetermined position of the feeder adjusting device at the time of feeder adjustment, the feeder connecting unit 32 and the feeder adjusting device connecting unit 33 are connected, and control is performed between the feeder control unit 26 and the feeder adjusting device control unit 31. Commands and various data can be sent and received. The feeder adjusting device is provided with imaging means such as a camera 30 and is disposed at a position above the supply port 21 of the tape feeder 4 mounted on the feeder adjusting device (see FIG. 2).

The feeder adjustment device control unit 31 includes an image processing area 31a, a storage area 31b, and an arithmetic processing area 31c. The image processing area 31a performs processing of an image captured by the camera 30 to recognize the position of the imaging target. Various data such as a reference stop position of the tape 8 and the sprocket 23, a control program, and the like are stored in the storage area 31b. The arithmetic processing area 31c measures an error between the stop position of the tape 8 or the stop position of the sprocket 23 recognized in the image processing area 31a and the reference stop position stored in the storage area 31b.

  That is, when there is no dimensional error in the gears 25a to 25f constituting the transmission mechanism 25 that transmits the drive of the motor 24 to the sprocket 23, when the motor 24 rotates intermittently corresponding to the storage pitch of the electronic components, every pitch. The moving distance of the tape 8 and the rotation angle of the sprocket 23 are constant, and the feed hole 8a and the engaging portion 23a engaged with the feed hole 8a are always recognized at the same stop position (reference stop position). However, since there is a dimensional error in the gears 25a to 25f as described above, the moving distance of the tape 8 and the rotation angle of the sprocket 23 for each pitch are not constant, and the stop position of the tape 8 and the sprocket 23 are not constant. An error occurs between the stop position and the reference stop position.

  Therefore, in the feeder adjusting device, the error between the stop position of the tape 8 and the stop position of the sprocket 23 and the reference stop position during one rotation of the sprocket 23 is measured, and the absolute value of the sprocket 23 detected by the encoder 27 is measured. An error table (see FIG. 6A) is created in association with the rotation angle and stored in the storage area 31b.

  FIG. 6A illustrates a schematic diagram of an error table stored in the storage area 31b. The horizontal axis indicates the absolute rotation angle (encoder detection value) of the sprocket 23 detected by the encoder 27, and the vertical axis indicates the stop position of the tape 8 or the stop position of the sprocket 23 and the storage area recognized in the image processing area 31a. This is an error from the reference stop position stored in 31b. In the diagram illustrated here, the stop position of the tape 8 or the stop position of the sprocket 23 passes the reference stop position in the region where the absolute rotation angle of the sprocket 23 is 0 ° to 240 ° and 330 ° to 360 ° (0 °). (Displayed on the + side in the figure), it can be seen that the stop position of the tape 8 or the stop position of the sprocket 23 has not reached the reference stop position in the region of 240 ° to 330 ° (on the − side in the figure). display). Therefore, the correction amount for each absolute rotation angle is calculated so that the stop position of the tape 8 or the stop position of the sprocket 23 becomes the reference stop position even if the absolute rotation angle of the sprocket 23 is 0 ° to 360 °. Then, a correction amount table is created and stored in the storage unit 31b.

  FIG. 6B illustrates a diagram of a correction amount table stored in the storage area 31b. The horizontal axis is the absolute rotation angle (encoder detection value) of the sprocket 23, and the vertical axis is the correction amount. As is clear from a comparison with the error table illustrated in FIG. 6A, the correction amount table and the error table depict symmetrical figures with the horizontal axis as an axis. That is, the stop position of the tape 8 or the stop position of the sprocket 23 passes the reference stop position (indicated on the + side in FIG. 6A) in the region of 0 ° to 240 °, 330 ° to 360 ° (0 °). As a negative correction amount, adjustment is made so that the stop position of the tape 8 or the stop position of the sprocket 23 becomes the reference stop position. Further, the stop position of the tape 8 or the stop position of the sprocket 23 does not reach the reference stop position (displayed on the minus side in FIG. 6A). In the region of 240 ° to 330 °, the tape 8 stops as a positive correction amount. The position or the stop position of the sprocket 23 is adjusted to be the reference stop position.

  The correction amount table stored in the storage area 31b is transmitted to the storage area 26a of the feeder controller 26. In FIG. 6C, when the tape feeder 4 is mounted on the electronic component mounting apparatus and the electronic components are supplied, if the absolute rotation angle α of the sprocket 23 is detected by the encoder 27, it is stored in the storage area 26a. Based on the correction amount table, the correction start position β corresponding to the absolute rotation angle α can be specified. The feeder control unit 26 controls the drive amount of the motor 24 based on the correction amount table, and thereby adjusts the stop position of the tape 8 or the stop position of the sprocket 23 to be the reference stop position.

  As described above, the feeder adjusting device according to the present embodiment performs index pitch rotation of the sprocket by the speed reduction mechanism including the gear train in which the reduction ratio with the driven gear provided in the sprocket is an integer multiple, and feeds the pitch of the tape. For a tape feeder equipped with a drive means, a correction amount table representing a correction amount for each absolute rotation angle of the sprocket is created, and the tape feeder after pitch feeding is performed by feedforward control of the tape feeder drive based on the correction amount table. The stop position of the sprocket or the stop position of the sprocket after the index rotation is adjusted to the reference stop position. Therefore, even with a tape feeder equipped with a speed reduction mechanism using gears with relatively low processing accuracy, it is possible to improve the accuracy of the tape stop position after pitch feeding without being affected by the mechanical accuracy. Become. Note that the feeder adjustment device is not necessarily a dedicated device, and can be disposed in the electronic component mounting device.

  Next, the feeder adjustment method in one embodiment of the present invention will be described. This feeder adjustment method can be applied to a feeder adjustment apparatus provided with the above-described tape feeder. Hereinafter, the feeder adjustment method will be described in the order of steps with reference to the flowchart shown in FIG.

  First, the stop position after pitch feed of the tape 8 or the stop position after index rotation of the sprocket 23 during one revolution of the sprocket 23 is measured (ST1... Measurement step). Next, the absolute rotation angle of the sprocket 23 detected by the encoder 27 and the stop position after pitch feed of the tape 8 or the stop position after index rotation of the sprocket 23 and the reference stop position measured in the measuring step (ST1). An error is calculated for each absolute rotation angle of the sprocket 23 from the error (ST2... Calculation step). A correction amount for each absolute rotation angle of the sprocket 23 is calculated from the error calculated in ST2 (ST3... Calculation step). The correction amount table calculated in ST3 is transmitted to the feeder control unit 26 on the tape feeder 4 side (ST4... Transmission process).

  Through the above steps, the correction amount table is stored in the feeder control unit 26 of the tape feeder 4 and is adjusted so that the stop position after the pitch feed of the tape 8 or the stop position after the index rotation of the sprocket 23 becomes the reference stop position. The

  As described above, the feeder adjustment method according to the present embodiment performs the pitch feed of the tape by rotating the index of the sprocket by the speed reduction mechanism including the gear train in which the reduction ratio with the driven gear provided in the sprocket is an integer multiple. For a tape feeder equipped with a drive means, a correction amount table representing a correction amount for each absolute rotation angle of the sprocket is created, and the tape feeder after pitch feeding is performed by feedforward control of the tape feeder drive based on the correction amount table. The stop position of the sprocket or the stop position of the sprocket after the index rotation is adjusted to the reference stop position. Therefore, even if the speed reduction mechanism uses a gear with relatively low processing accuracy, the stop position of the tape after pitch feeding can be adjusted with high accuracy without being affected by the mechanical accuracy.

  According to the feeder adjusting device, the feeder adjusting method, and the tape feeder of the present invention, even if the speed reduction mechanism uses a gear with relatively low machining accuracy, the tape stops after pitch feeding without being affected by the mechanical accuracy. This has the advantage that the position can be adjusted with high accuracy, and is useful in the field of electronic component mounting using a tape feeder.

The side view which shows the structure of the electronic component mounting apparatus of one embodiment of this invention The side view which shows the structure of the tape feeder of one embodiment of this invention Explanatory drawing which shows the structure of the encoder of one embodiment of this invention (A) Explanatory drawing which shows the detected part of the encoder of one embodiment of this invention (b) Explanatory drawing which shows the detected part of the encoder of one embodiment of this invention (c) One embodiment of this invention Explanatory drawing which shows the detected part of the encoder of The block diagram which shows the control system of the tape feeder and feeder adjustment apparatus of one embodiment of this invention (A) An explanatory diagram illustrating an error table according to an embodiment of the present invention. (B) An explanatory diagram illustrating a correction amount table according to an embodiment of the present invention. (C) An embodiment according to the present invention. Schematic diagram of correction amount table The flowchart which shows the feeder adjustment method of one embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Tape feeder 8 Tape 8a Feed hole 22 Tape feed mechanism 23 Sprocket 23b Engagement part 24 Motor 25 Transmission mechanism 26 Feeder control part 26a Storage area 27 Encoder 31 Feeder adjustment apparatus control part 31a Image processing area 31b Storage area 31c Operation processing area

Claims (3)

Deceleration of a sprocket provided on the circumference with engaging portions that engage with feed holes provided at equal pitches on the tape, an encoder that detects the absolute rotation angle of the sprocket, and a driven gear provided on the sprocket Drive means for index-rotating the sprocket by a speed reduction mechanism comprising gear trains each having an integral multiple of the ratio to feed the pitch of the tape, and correcting the drive amount of the drive means to correct the tape pitch after feeding A feeder adjustment device for calculating a correction amount of the drive amount of the drive means in a tape feeder provided with a feeder control means for adjusting a stop position,
Measuring means for measuring the stop position after pitch feeding of the tape or the stop position after index rotation of the sprocket, the absolute rotation angle of the sprocket detected by the encoder, and the pitch of the tape measured by the measuring means Calculation means for calculating the error for each absolute rotation angle of the sprocket from an error between a stop position after feeding or after the index rotation of the sprocket and a reference stop position, and the sprocket calculated by the error calculation means Storage means for storing the error for each absolute rotation angle as an error table, calculation means for calculating a correction amount for each absolute rotation angle of the sprocket from the error table stored in the storage means, and calculation by the calculation means Correction amount for each absolute rotation angle of the sprocket Further comprising a transmission means for transmitting to the feeder control means provided in the tape feeder Te feeder adjustment device according to claim. From a gear train in which a reduction ratio of a sprocket that engages a feed hole provided at an equal pitch in the tape, an encoder that detects an absolute rotation angle of the sprocket, and a driven gear provided in the sprocket is an integral multiple of each. A feeder adjusting method for adjusting a stop position after pitch feeding of the tape in a tape feeder having a driving means for index-rotating the sprocket by a reduction mechanism comprising:
A measuring step for measuring the stop position after pitch feeding of the tape or the stop position after index rotation of the sprocket during one revolution of the sprocket, and the absolute rotation angle of the sprocket detected by the encoder and the measuring step Calculating the error for each absolute rotation angle of the sprocket from the error between the stop position after pitch feeding of the tape measured in step 1 or the error between the stop position after index rotation of the sprocket and the reference stop position; A calculation step for calculating a correction amount for each absolute rotation angle of the sprocket from the error calculated in the step, and a correction amount for each absolute rotation angle of the sprocket calculated in the calculation step is stored in the tape feeder as a correction amount table. A transmission step of transmitting to the feeder control means provided Feeder adjustment method comprising Mukoto. Deceleration of a sprocket provided on the circumference with engaging portions that engage with feed holes provided at equal pitches on the tape, an encoder that detects the absolute rotation angle of the sprocket, and a driven gear provided on the sprocket Drive means for index-rotating the sprocket by a speed reduction mechanism comprising gear trains each having an integral multiple of the ratio to feed the pitch of the tape, and correcting the drive amount of the drive means to correct the tape pitch after feeding A tape feeder having a feeder control means for adjusting a stop position,
Measuring means for measuring the stop position after pitch feeding of the tape or the stop position after index rotation of the sprocket, the absolute rotation angle of the sprocket detected by the encoder, and the pitch of the tape measured by the measuring means Calculation means for calculating the error for each absolute rotation angle of the sprocket from an error between a stop position after feeding or after the index rotation of the sprocket and a reference stop position, and the sprocket calculated by the error calculation means Feeder adjustment comprising storage means for storing the error for each absolute rotation angle as an error table, and calculation means for calculating a correction amount for each absolute rotation angle of the sprocket from the error table stored in the storage means Correction amount for each absolute rotation angle of the sprocket calculated in advance in the device Tape feeder and corrects the drive amount of the drive means based.

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