KR100842357B1 - Surface mounting device using motion profile and operating method thereof - Google Patents

Abstract

A surface mounting device using motion profiles and an operating method thereof are provided to mount a lot of components within a given time by reducing a picking error. An operating method of a surface mounting device using motion profiles includes the steps of: obtaining information of components mounted on a component feeder from a job file(S1); selecting one of plural motion profiles previously stored to define a feeding speed of the element feeder according to the information of components; and mounting the components on a printed circuit board by driving the component feeder at the selected feeding speed according to the selected motion profile(S4), wherein the step of obtaining the information of components is acquired through the information of components stored at a memory mounted on the component feeder.

Description

Surface mounter using motion profile and its driving method {SURFACE MOUNTING DEVICE USING MOTION PROFILE AND OPERATING METHOD THEREOF}

Figure 1 is a front view of the tape reel feeding apparatus presented in the Patent Application No. 10-276482 filed by the applicant.

2 is a perspective view of FIG. 1.

3 is a block diagram showing a configuration according to the present invention.

4 is a graph illustrating several examples of motion profiles.

5 is a flowchart illustrating the operation of the surface mounter according to the present invention.

<Description of the symbols for the main parts of the drawings>

200: surface mounter 210: database

220: controller 230: component feeder

240: picker

310, 320, 330, 340: motion profile

The present invention relates to a surface mounter using a motion profile and a method of driving the same. More specifically, the optimum feeding speed for each part can be realized using a predetermined motion profile, thereby maximizing work efficiency. The present invention relates to a surface mounter and a method of driving the same, which can reduce picking errors and enable mounting more components in a given time.

In recent years, with the trend of miniaturization of electronic products using electrical devices, electronic components have been increased in density, size, and diversification. In response to this, the use and research of surface mounting technology (SMT) in the printed circuit board assembly production is actively progressing.

The surface mounter is a core equipment of the surface mount assembly equipment for mounting a surface mounting device (SMD) on a printed circuit board. The surface mounter receives various surface mount components from a component supply machine and transfers them to the mounting position of the printed circuit board. This equipment is mounted on a circuit board.

The surface mounter includes a feeder part for supplying mounting parts (hereinafter referred to as a tape feeder), an XY table part for determining a working position, a conveyor part for conveying a printed circuit board to be worked on, and a tape feeder. It consists of a head part etc. which are picked up one by one and are mounted on a printed circuit board.

The tape feeder is inserted into the recess groove so that the tape taped with vinyl is transported by one pitch with the vinyl peeled off so that the picker can sequentially pick up the mounting parts in the recess groove one by one.

For more details, FIGS. 1 and 2 are presented. FIG. 1 is a front view of a tape reel feeding apparatus disclosed in Patent Application No. 10-276482 filed by the present applicant, and FIG. 2 is a perspective view of FIG.

The motor 10 that is repeatedly rotated forward and backward for a predetermined time is installed in the frame, and the rotational motion of the motor 10 is switched to the linear motion by the power switching means to be transmitted to the slider 16. The screw shaft 12 is fastened, and the elastic member 14 is inserted into the screw shaft 12 to control the slider 16 reciprocating by the driving force of the motor 10. A long hole 34 is formed at one side of the slider 16, and the hinge pin 35 is fixedly coupled to the long hole 34 to guide the left and right linearly reciprocating.

The feed hole formed in the tape reel is fitted to the protrusion 40 formed in the drive wheel 18, and then power is applied to the motor 10. The motor 10 is driven in the forward direction to rotate the screw shaft 12, the rotational movement of the screw shaft 12 is transmitted to the slider 16 to advance by the set stroke. In this case, the slider 16 is linearly moved by the hinge pin 35 fixedly inserted into the long hole 40. When the slider 16 is moved forward, the lever 24 coupled to the slider is engaged with the latch wheel 22 to move forward. At this time, the driving wheel 18 fixed to the same axis 20 as the latch wheel is fixed at an angle. As a result, the tape reel in which the feed hole is inserted into the protrusion 40 of the driving wheel 18 is advanced, and the vinyl covering the tape reel is peeled off to expose the mounting parts to the outside.

In this state, when the motor 10 is driven in the reverse direction to rotate the screw shaft 12 in the reverse direction, the slider 16, which has been advanced, is returned to its original position. Since the latch 25 is sandwiched between the projections 23 of the latch wheel 22 by the link means, the driving wheel 18 is not rotated in the reverse direction and remains in a stopped state, so that the tape is driven in accordance with the driving of the motor 10. The reels are fed in pitches. Here, the link means includes a connecting link 28 connected to the lower side of the slider 16 by a hinge pin 27 and a push link connected to one side of the connecting link 28 by the hinge pin 29. 30 and a pressing piece 32 connected to the push link 30 by the hinge pin 31.

On the other hand, the upper part of the frame is fitted with a long support bar 36 of the square shape freely detachable to the lower portion through which the tape reel passes, and is fixed to both ends by the fixing means (38). 1 and 2, reference numeral 26, which is not described, is a hinge piece, and 110, a cover.

When the tape reel is conveyed by one pitch and the mounting component is positioned in the opening, the picker can absorb the mounting component and mount it on the printed circuit board. That is, the tape reel is generally provided with a motor to feed the component by providing a rotational force to move the tape reel to the pick-up position of the picker. However, there are various types of components to be mounted, and when the feeding speed is uniformly determined, a pick-up error rate increases. That is, a problem arises in that the pick-up error rate is high in certain mounting parts.

In addition, the feed rate of the feeder can not be adjusted for each of the various mounting parts, there is a problem that the work efficiency is not optimal. In other words, it is an urgent need for a study on the feeding speed of the feeder that can cope with each component.

Therefore, the present invention is to solve the above problems,

The present invention provides a surface mounter and a driving method using the motion profile that can realize the optimum feeding speed for each part by using a predetermined motion profile, maximizing work efficiency.

SUMMARY OF THE INVENTION The present invention provides a surface mounter and a method of driving the same that can reduce picking errors and allow more components to be mounted within a given time.

The surface mounter according to the present invention includes a component feeder and a picker for feeding a component to be mounted on a printed circuit board, and a mounting unit for transferring and mounting the component to the printed circuit board by the picker, and the component feeder. And a database for storing a plurality of motion profiles defining a feeding speed of the feeder according to a component of the feeder, and a controller for selecting one of the plurality of motion profiles to control the feeding speed of the component feeder.

Preferably, the component feeder further includes a memory that stores information of the mounted component, and the component information includes component type, size, price, weight, component use frequency, picking error, and average picking error rate. rate). The part information also includes the state of the part feeder or the state of the picker. Here, the state of the component feeder may be about the age of the component feeder, the state of the picker may be the type of nozzle or the age of age.

In addition, the method of driving the surface mounter according to the present invention comprises the steps of acquiring information of a part mounted on a part feeder, selecting one of a plurality of pre-stored motion profiles defining a feeding speed of the part feeder according to the part information And mounting the component on the printed circuit board by driving a feeding speed of the component feeder according to the selected motion profile.

Hereinafter, an embodiment of the present invention will be described in detail.

3 is a block diagram showing a configuration according to the present invention.

As shown therein, the surface mounter 200 includes a database DB (210), a controller (220), a component feeder (230), and a picker (240).

The controller 220 of the present invention may be a motion control system (MCS) provided in the surface mounter, and the controller 220 is connected to the database 210, the component feeder 230, and the picker 240, respectively, to provide information. Send and receive

The picker 240 includes a mounter head, and the mounter head is provided with a nozzle capable of absorbing and mounting the component from the component feeder. Although not shown, the picker 240 is generally mounted on the X-Y gantry for two-dimensional movement, and the nozzle is configured to be movable in the vertical direction. The picker 240 is a component of a mounting unit that transfers and mounts a component of the component feeder 230 to a printed circuit board.

The component feeder 230 may further include a separate memory, and the memory may be a flash memory. The memory of the component feeder 230 preferably stores information about components. It is also possible for the memory to be mounted on a feeder base or adjacent portion other than the component feeder 230 on which the plurality of component feeders 230 are mounted, and the present invention includes such a portion.

In this case, the part information may be the size, price, weight, part use frequency, picking error, and average picking error rate of the part, as well as the concept of including a part feeder or a picker state. . That is, up to the deteriorated state of the component feeder or the type or state of the nozzle of the picker may be included in the component information. Here, the frequency of use of the parts is preferably the frequency of use of the parts mounted on one feeder.

In addition, the part information includes the type of the part, and the type of the part refers to the form or shape of the part. The type of the component may be roughly divided into a general chip, a semiconductor chip, a ball grid array (BGA), a connector, and the like, but is not limited thereto. The general chip includes a square resistor, capacitor, LED, etc., and the semiconductor chip includes a quad flat package (QFP), a plastic leaded chip carrier (PLCC), and the connector includes a PCMCIA. Can be modified by one skilled in the art.

The picking error is i) when there is no part to pick up due to the parts splashing and flying away when feeding the part of feeder, or ii) when abnormality is found by checking the pneumatic pressure of the picker nozzle in the controller, iii) based on the image taken by vision camera. If it is determined that the part has not been picked up, iv) there may be a case in which the wrong part is picked up, and thus the wrong part is mounted on the board. In order to check the picking error, a pneumatic check of the nozzle or image confirmation through a vision camera is requested.

This part information is communicated to the controller 220 in the memory of the part feeder.

The database 210 stores a plurality of motion profiles in which feeding speed information of the component feeder 230 is pre-stored. Here, the feeding speed refers to the rotational speed of the motor which moves the tape reel of the component feeder to the pick-up position where the picker can pick up as described above, and controls the feeding speed of the feeder by controlling the rotational speed of the motor.

An example of such a motion profile is shown in FIG. 4. 4 is a graph illustrating several examples of motion profiles, where the x-axis of FIG. 4 is time and the y-axis is acceleration.

A plurality of motion profiles 310, 320, 330, and 340 are stored in the database, and may be stored as acceleration information, but may also be stored as other speed or position information.

The motion profile 310, 320, 330, 340 is determined through various considerations. First, it is desirable to form a motion profile so that when the size of the part is large, it is slowly fed from the feeder. In addition, the higher the price of the part is to move slowly, the heavier the weight of the part is better to feed slowly from the feeder.

In addition, the older the state of the component feeder, the more often the performance is degraded, so it is better to feed slowly in the feeder. If the frequency of use of the parts is high, it is desirable to form a motion profile so that the parts can be mounted more quickly. In addition, in the case of a part with a high picking error rate, it is good to feed slowly at the feeder. The formation of such a motion profile may be determined through experimentation or may be determined by quantifying the experience of a skilled person.

The database 210 in which the motion profile is stored preferably initializes the motion profile stored in the memory of the component feeder prior to performing the mounting operation. For a more detailed description, FIG. 5 is presented.

5 is a flowchart illustrating the operation of the surface mounter according to the present invention. As shown here, first, the part information is obtained from the memory of the part feeder (S1). That is, the memory of the component feeder may be stored in the form of a job file, which is obtained through communication in the controller. In this case, the acquired information of the part may be at least one of a part type, size, price, weight, part use frequency, average picking error rate, part feeder or picker state, and may contain various information according to the type of the product. Can be.

Next, the controller may grasp and check a part mounted on the part feeder based on the information obtained from the part feeder (S2).

Next, the controller selects a motion profile most suitable for the component mounted in the component feeder from among the motion profiles stored in the database, or selects a default motion profile (S3). If the basic motion profile is selected, after the drive of the component feeder is started as the basic type, the motion profile suitable for the component is changed.

Next, the component feeder is driven according to the selected motion profile so that the picker mounts the component on the printed circuit board (S4).

In this way, it is possible to implement the optimum feeding speed of the feeder for each part by using the preset motion profile, which can maximize the work efficiency and reduce the picking error. It is possible to mount in a given time.

As seen above, according to the present invention,

By using the preset motion profile, the optimum feeding speed of the feeder can be realized for each part, thereby maximizing work efficiency.

In addition, picking errors can be reduced so that more parts can be mounted in a given time.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (17)

A component feeder having a memory for storing information of components to be mounted on a printed circuit board, and feeding the components; A mounting unit having a picker and transferring the component to the printed circuit board by the picker; A database for storing a plurality of motion profiles defining a feeding speed of the feeder according to a part of the part feeder; And A controller configured to control a feeding speed of the component feeder by selecting one of the plurality of motion profiles; And the memory is in communication with the controller to select a motion profile according to the part information. delete The method of claim 1, And the information of the part is at least one of a size, a price, a weight, a part use frequency, a picking error, and an average picking error rate of the part. The method of claim 3, And a camera, wherein the picking error is obtained by using an image captured by the camera. The method of claim 3, The picking error is obtained by checking the nozzle air pressure of the picker. The method of claim 1, And said part information is a state of said part feeder or a state of said picker. delete The method of claim 1, And the controller selects from a motion profile according to a type of a component mounted on the component feeder. The method of claim 1, And the controller selects from the motion profile according to the state of the component feeder or the state of the picker. The method of claim 9, And the state of the component feeder is the degree of aging of the component feeder. The method of claim 9, The picker is a surface mounter, characterized in that the type of nozzle and the degree of aging. Obtaining information of a part mounted on the part feeder; Selecting one of a plurality of previously stored motion profiles defining a feeding speed of the part feeder according to the part information; And Mounting the component on a printed circuit board by driving the component feeder at a selected feeding speed according to the selected motion profile; The method of claim 1, wherein the acquiring of the component information comprises acquiring, through communication, component information stored in a memory mounted on the component feeder. delete The method of claim 12, And the information of the part is at least one of a kind, a size, a price, a weight, a part use frequency, and an average picking error rate of the part. The method of claim 12, And said part information is a state of said part feeder or a state of said picker. The method of claim 14, And a camera, wherein the picking error is obtained by using an image photographed by the camera. The method of claim 14, And the picking error is obtained by checking nozzle pneumatic pressure of the picker.

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