• General introduction:

In this step, the operator should let the machine pick up each different component from the feeder or tray, then scan the component by the chip camera.

Next, the operator can choose the corresponding component data from the machine software library, on this basis, then he can edit the data according to the real component, such as the exact component size, thickness, pin number, pin pitch, as well as pin length and width, etc.

In this step, using the auto teach of the machine software will help to save the time of editing the component date.

Machine learning

• Component recognition theory:

Component recognition is always achieved by the combination of different light sources. Laser scanning, backlight, and front light are the most common alignment method at present.

As to the laser scanning, it is always recognized chip components such as SOT, SOP, SOJ, and PLCC, and these components have a regular shape. Laser scanning is the standard configuration of the machine, it only can check the body of the chips but is not able to check the pins.

Next is the backlight, as the standard feature also, it does not check the chip components as well as the component with balls at its bottom.

The last is the optional choice: front light, it can check any kinds of components. If the operator chooses to use the front light on a machine without this function, then the error will appear.

• Component alignment type:

This means that which shape algorithm that the operator should choose to recognize the present component.

For instance, if he is going to mount SOP28 chips, then he should choose the “SOP” type in the machine components library, so the machine will detect the chips according to the shape features and sizes of the “SOP”.

• Alignment light level:

This means which light value is most suitable for scanning a certain component.

When making the production program, the operator needs to set appropriate light values for both the front and backlight. In order to acquire a good recognition of the chips, a suitable light value setting is important.

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