Automated Optical Inspection Unit for PCB Assembly

Product Specifications

Technical details and manufacturing context for Automated Optical Inspection Unit

Definition

An Automated Optical Inspection Unit is a critical component within a Modular Printed Circuit Board Assembly System. It uses high-resolution cameras, controlled lighting, and image processing algorithms to automatically inspect PCBs for manufacturing defects such as missing components, misalignment, solder bridges, and component polarity errors during the assembly process. The unit captures images of the PCB from multiple angles, and software compares these against reference designs or golden samples to identify deviations. Machine learning algorithms may be employed to classify defect types and severity. The unit is typically integrated into a production line, where it performs inline inspection at various stages. Its inspection area ranges from 300 to 500 mm × mm, with a resolution of 10–25 µm/pixel, allowing detection of fine defects. Inspection speed is 0.5–2.0 m²/min, balancing throughput with resolution. Detection accuracy is ±0.05 mm, and the false call rate is ≤0.5%. The lighting operates in the visible spectrum (450–650 nm), with optional UV/IR. Power supply is 220 V AC ±10%, with consumption of 1.5–3.0 kW. Operating temperature is 10–40 °C, humidity 20–80% RH non-condensing, and ingress protection is IP54–IP65 per IEC 60529. The unit weighs 800–1200 kg. Materials include an aluminum alloy frame, optical glass lenses, LED lighting arrays, and electronic circuit boards. This directory entry provides reference values; actual specifications must be confirmed with the legal manufacturer for the specific model and application.

Working Principle

The unit captures high-resolution images of PCBs using multiple cameras under controlled lighting conditions. Image processing software compares the captured images against reference designs or golden samples to identify deviations and defects. Machine learning algorithms may be employed to classify defect types and severity. The system uses visible light (450–650 nm) and can achieve a resolution of 10–25 µm/pixel. The inspection area is 300–500 mm × mm, and the speed is 0.5–2.0 m²/min. Detection accuracy is ±0.05 mm, with a false call rate of ≤0.5%. The unit operates within 10–40 °C and 20–80% RH, and is protected to IP54–IP65.

Common Materials

Aluminum alloy frame, Optical glass lenses, LED lighting arrays, Electronic circuit boards

Technical Parameters

Parameter	Typical range	Notes & selection driver
Inspection Area	300–500 mm × mm	Maximum PCB size that can be inspected in one pass.
Resolution	10–25 µm/pixel	Higher resolution detects finer defects but reduces throughput.
Inspection Speed	0.5–2.0 m²/min	Affects line cycle time; balance with resolution.
Detection Accuracy	±0.05 mm	Positional accuracy of defect location.
False Call Rate	≤0.5 %	Percentage of good boards flagged as defective; lower is better.
Lighting Wavelength	450–650 nm	Visible spectrum; may include UV/IR options.
Power Supply	220 ±10% V AC	Single phase; other voltages on request.
Power Consumption	1.5–3.0 kW	Depends on lighting and computer configuration.
Operating Temperature	10–40 °C	Outside range may affect accuracy.
Humidity	20–80 % RH	Non-condensing.
Ingress Protection	IP54–IP65	Protection against dust and water jets.IEC 60529
Weight	800–1200 kg	Including base and enclosure.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Camera Array
Captures high-resolution images of PCB surfaces from multiple angles

Material: Aluminum housing with optical glass
Lighting System
Provides controlled illumination for optimal image capture and defect detection

Material: LED arrays with diffusers
Image Processing Unit
Processes captured images and compares against reference designs to identify defects

Material: Electronic circuit boards with processors
Mechanical Positioning System
Precisely positions cameras and lighting relative to the PCB

Material: Steel and aluminum with linear guides

Manufacturers of Automated Optical Inspection Unit

Manufacturer profiles associated with Automated Optical Inspection Unit.

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Frequently Asked Questions

What defects can this AOI unit detect?

It detects missing components, misalignment, solder bridges, and component polarity errors during PCB assembly, as described in the product definition.

What is the inspection area and resolution?

The inspection area is 300–500 mm × mm, and the resolution is 10–25 µm/pixel. Higher resolution detects finer defects but reduces throughput.

What are the environmental requirements?

Operating temperature is 10–40 °C, humidity 20–80% RH non-condensing, and ingress protection is IP54–IP65 per IEC 60529. These are reference values; confirm with the manufacturer.

How is the false call rate defined?

The false call rate is the percentage of good boards flagged as defective; the reference value is ≤0.5%. Lower is better. Verify the actual rate for your application.

Data Basis

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Preliminary Technical Classification

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pressure:	Atmospheric (no pressure requirements)
other spec:	Humidity: 30-70% RH non-condensing, Vibration: <0.5G, Illumination: Controlled ambient lighting required
temperature:	+10°C to +40°C

Automated Optical Inspection Unit

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