PCBA Tech - SMT placement machine programming and operating points

The main task of the placement machine is to accurately mount various components on the PCB board, which is controlled by a computer and a vision system. The basic principle of placement is to pick up the components from the feeder through a vacuum nozzle, and the recognition device The component shape and size are calibrated, and then the components are mounted according to the position coordinates set in the program. The entire mounting process is completed by the computer-controlled corresponding program. The main procedures include:

1. Position coordinate program of components (NC program)

2. Component outline size shape program (PARTS program, SUPPLY program)  3. Arrangement order of components on the placement machine (ARRAY program)

4. Substrate recognition method (MARK program)

5. The outline coordinate size and positioning method of the PCB board (BOARD program) Take the Panasonic model as an example

The main content of each part of the program:  PCB board program:

It mainly includes: the outline size of the PCB board, the thickness of the substrate, and the positioning method of the PCB board. MARK program:

Mainly include: MARK point shape and size, MARK shape, MARK point recognition type, substrate material type, PCB board brightness selection (BOARD LIGHT). The vision system of the placement machine is a real-time image recognition system based on a computer. The camera detects the light intensity distribution signal of the MARK point within a given range, and is processed by a digital signal circuit into a digital image signal, and then divided into a certain number In the network pixels, the value of each pixel gives the average brightness of the MARK point. There are two ways to identify the MARK point: one is grayscale recognition (that is, grayscale resolution recognition), and the image Multi-level brightness is used to express the resolution. It specifies the discrete value at which the placement machine can distinguish the measured light intensity at a given point. Generally, 256 levels are used; the other is BINARY recognition, which is a grid covering the original image. size.

The operation points of SMT placement machine

SMT placement machine is one of the key equipment of SMT equipment, because its efficient work efficiency and stable performance have brought great advantages to our production. With the placement machine, production efficiency can be greatly improved and high For customers with quality products, the role of SMT placement machine is irreplaceable. SMT placement machine manufacturers share the operating points of SMT placement machine.

One, to understand the common signs of SMT placement machines.

We all know that many machines and equipment have specific signs that we need to learn before they are used, and placement machines are no exception. So, at this time, you need to fully understand the meaning and function of these signs, so as to play a warning role. After fully understanding the placement machine, you can use the placement machine more safely.

Second, do a good start-up inspection.

For example, it is very important to determine whether the air pressure of the patch is in the normal range; secondly, whether there are any debris inside the machine to prevent interference and malfunction; also, to ensure that the patch is installed in place, This is also very important, because it is the key to ensure long-term normal use.

Third, it is necessary to ensure the boot sequence.

When using the placement machine, pay attention to whether a boot sequence is correct, which is closely related to the safety of employees and the use of the machine. A correct boot sequence is the guarantee for later operation and work. Therefore, special attention should be paid to the boot sequence.

Fourth, we must actively troubleshoot faults.

The smt placementmachine will inevitably cause certain consumption and damage to the machine after a long period of use. Therefore, troubleshooting is also an important task. In this way, we can actively investigate and find problems in a timely manner, so as to solve the problems quickly and effectively. This is our main purpose and main role of troubleshooting.