The Important Role of Automatic Camera Focusing Machine in SMT Industry

1.The core role

Precise alignment of PCB pads and components:

In the Pick & Place machine, the camera quickly identifies the Mark point (reference point) and component position on the PCB through automatic focus, ensuring accurate placement coordinates (accuracy up to ±10μm).

Adapt to the focal length change of PCB of different thickness (such as flexible board FPC) to avoid imaging blur caused by height difference.

Component defect detection:

Automatic focusing with AOI (Automatic Optical Inspection) system, clearly capture solder paste printing quality, component polarity, offset, monument and other defects.

Detect the mounting status of micro-components (such as 0201, 01005 packages) to avoid virtual welding or missed bonding.

Dynamic compensation and calibration:

Real-time monitoring of the Z-axis height of the placement machine nozzle, adjustment of camera depth of field through automatic focus, compensation for PCB warping or platform vibration errors.

Calibrate the collaborative work of multiple camera systems (such as dual cameras imaging PCBS and components separately).

High-speed production adaptation:

The millisecond focus speed matches the high beat of the SMT production line (such as tens of thousands of points per minute) to reduce downtime.

2. Typical application scenarios

Solder paste post printing Inspection (SPI)

The auto-focus camera scans the solder paste thickness, shape and coverage on the PCB pad to ensure uniform printing.

For example: detect solder paste bridge, less tin, pull point and other defects.

Placement machine component alignment

Identify the pin spacing of the IC chip (such as QFN, BGA package) to ensure that the pin is fully aligned with the pad when mounting.

Angle and position correction of opposite-sex components such as connectors and shields.

AOI inspection after reflow welding

Automatically focus and enlarge the solder joint area to detect defects in reflow welding process such as virtual welding, cold welding and tin ball.

Distinguish the imaging effect of different reflective materials (such as metal and plastic).

Accurate positioning of the repair table

When repairing BGA or small components, locate faulty solder joints with high power focus for heat gun or laser repair.

This time, Yangling Electronics mainly talking about the importance and application scenarios of automatic camera focusing machine, next time Nancy will focus on the details of automatic camera focusing machine. If you are interested in our products, please contact Nancy to make an offer for you. Thank you.