JPH058835A - Transfer control method for printed circuit board - Google Patents

Abstract

PURPOSE:To resolve the problem of preventing part mounting machines from lowering the operational efficiency and provide a transfer control method for printed circuit boards in order to enable the efficient transfer of the printed circuit boards with respect to the part mounting machines and the transfer control method in the mounting process of using a plural number of the mounting machines. CONSTITUTION:A transfer conveyor 1 and a connection conveyor 2 change the transfer speed in point of time by using an operation pattern set in a control device 7 and thus transfer a printed circuit board 8 at high speed. This improves operational efficiency and prevents parts from getting out of position, floating and turning over, etc., so that it improves a mounting quality and reduces correction loss etc., in a successive process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the transfer of a printed circuit board in a component mounting process including a component mounting machine and a plurality of mounting machines.

[0002]

2. Description of the Related Art Conventionally, when a board is carried in a component mounting process which is composed of a component mounting machine and its peripheral devices, etc., a component having a thick component thickness (high component height) is previously mounted in the preceding process. If the same component is mounted by the mounting machine itself, the substrate must be transported so that the component does not fall over or shift in position during transportation.

Conventionally, there has been taken a method of dealing with this problem by making the conveying speed extremely slow.

[0004]

However, in today's demand for higher mounting speed of component mounters and further improvement in production efficiency, it is necessary to extremely slow the transfer time of the printed circuit board as in the conventional case. There is a problem that not only the operating efficiency of the component mounter itself is reduced, but also the efficiency of the entire process is reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a printed circuit board transport control method for efficiently transporting a printed circuit board by optimally controlling the substrate transport speed.

[0006]

In order to achieve the above object, the present invention provides a belt conveyor (hereinafter referred to as a "conveyor"), a drive device for driving the conveyer conveyor, and a drive device for controlling the drive device. In a printed circuit board carrying device including a control device, a printed circuit board is carried by changing the moving speed of a carrying conveyor with time using an operation pattern set inside the control device.

[0007]

Therefore, according to the present invention, since the printed circuit board is conveyed at a high speed by optimally controlling the board conveying speed by the above-mentioned structure, not only the operating efficiency of the component mounting machine itself can be significantly improved. It is extremely effective in improving the efficiency of the entire process.

[0008]

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

FIG. 1 is an overall view of a printed circuit board conveyance control method according to an embodiment of the present invention. In the figure, 1 is a transfer conveyor inside the mounting machine, 2 is a transfer transfer conveyor for connecting the mounting machines, and 3 is a first driving conveyor 1.
Induction motor, 4 is a second induction motor for driving the coupling conveyor 2, 5 is a deceleration sensor for detecting deceleration timing, 6 is a position sensor for position counting, 7 is a control device, 8 is a printed circuit board, 9 Is a substrate sensor for detecting a printed circuit board, and 10 is a stopper.

FIG. 2 is a flow chart of this embodiment. The operation will be described below with reference to the drawings.

When carrying out the carrying operation, the printed board 8 carried by the carrying conveyor 2 for connection operated by the second induction motor 4 is detected by the board sensor 9, and the printed board 8 exists in the mounting machine. Alternatively, if the mounting is not completed, the transfer conveyor 1 is stopped before moving onto the transfer conveyor 1. First when the printed circuit board 8 does not exist or when mounting is completed
The printed circuit board 8 is carried into the mounter by the induction motor 3 operating the carrying conveyor 1 therein, and is positioned by the stopper 10.

At this time, the control device 7 controls the speeds of the first and second induction motors 3 and 4 as described below.

In the control device 7, an acceleration pattern, a deceleration pattern, and a maximum speed of the motor are preset as operation patterns. The factors that determine the pattern are shown in Fig. 3.
As shown in (a) and (b), it is the center of gravity, weight, contact area, etc. of the components already mounted. Further, these patterns can be set arbitrarily, and the setting can be easily changed when a part having a higher center of gravity than the parts currently existing in the industry and a large weight is generated.

Next, the procedure of the printed circuit board conveyance control in this embodiment will be described with reference to the flowchart of FIG.

When a transportation signal is input to the control device in step # 1, the preset acceleration pattern first induction motor 3 or second induction motor 4 starts operating (step # 2). At this time, a deviation from the set acceleration pattern is detected by the signal from the position sensor 6 to match the pattern. When the set acceleration is completed (step # 3), a constant speed operation is performed at the set maximum speed (step # 4). During this time, if there is an input from the deceleration sensor 5 as shown in step # 5, the deceleration processing of steps # 6 and # 7 is immediately performed. Also in this case, the deceleration pattern and the actual speed are matched as in the case of acceleration.

As described above, according to this embodiment, high-speed printed circuit board transportation can be easily realized by simply controlling the speeds of the transportation conveyor 1 and the coupling transportation conveyor 2.

[0017]

As is apparent from the above-described embodiments, the printed circuit board transportation control method of the present invention changes the transportation speed with time by using the operation pattern set in the controller, and is mounted on the component mounter. By shortening the time in the board transfer operation other than the operation, it is possible to improve the operation rate of the mounting machine alone and increase the efficiency of the entire mounting process. In addition, misalignment of parts during transportation,
By preventing floating or overturning, the mounting quality can be improved, and waste such as correction in the subsequent process can be reduced. In addition, by setting multiple operation patterns and switching them,
It becomes possible to perform a more optimal carrying operation for the printed circuit board to be carried according to the components already mounted.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a printed circuit board carrying device for carrying out an embodiment of the present invention.

FIG. 2 is a flowchart of a printed circuit board conveyance control method according to an embodiment of the present invention.

FIG. 3 (a) is a pattern diagram of a transfer speed when the contact area is large and the center of gravity is low in the same printed circuit board transfer control method. (B) The contact area of parts is small and the center of gravity is small in the same printed circuit board transfer control method. Pattern diagram of transport speed when high

[Explanation of symbols]

 1 Conveyor 2 Conveying Conveyor for Connection 3 First Induction Motor (Drive Device) 4 Second Induction Motor (Drive Device) 7 Control Device 8 Printed Circuit Board

Claims (1)

Claim: What is claimed is: 1. A printed circuit board component mounter and a plurality of mounters, which are used to convey the printed circuit board in a component mounting process.
In a printed circuit board transfer device configured by a drive device including a plurality of induction motors for driving the transfer conveyor, and a control device for controlling the drive device, the moving speed of the transfer conveyor is set inside the control device. A printed circuit board transport control method for transporting a printed circuit board by changing the transport speed with time by using the operation pattern set in.