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Visual inspection with stereomicroscopes

EuroQ uses Microsoft Teams for live defect assessment with customers

Visual inspections are part of the daily 1×1 of a quality service provider in the automotive sector. Visual inspections range from manual to fully automated. Some visual inspections are already automated by manufacturers using AI. However, the vast majority of visual inspections are still performed manually by well-trained visual inspection personnel. For many components, defect patterns can be detected with the naked eye or re-measured with simple tools. Other components or defect patterns are so delicate that we use stereomicroscopes with up to 90x magnification for visual inspection. We use a digital process to integrate our customers live for defect evaluation in borderline cases or newly appearing defect patterns.

Visual Inspection of Filigree Components

Filigree components include electronic components or electronic assemblies. Even a bad solder joint or another small defect can affect the quality of the assembly in the vehicle, which is why manufacturers attach great importance to quality assurance, for which there are various inspection options. EuroQ supports its customers in visual inspection with stereo microscopes.

Microscopy is a common method for material testing. During visual inspection with stereo microscopes we examine materials with up to 90x magnification. This can reveal various features, defects or structural details.

We inspect a wide variety of components, including an increasing number of electrical and electronic components or assemblies. For example, we use digital stereomicroscopes to inspect printed circuit boards and surface mount devices for a variety of potential defects. This can be solder joint quality, component alignment and placement, conductive path integrity, and other defects or damage.

The challenge: Fast defect evaluation in borderline cases

There are always borderline cases during visual inspection, and new defect patterns can appear at any time. This often requires a quick assessment by the customer’s specialists, who usually communicate with each other by photo and phone. Thanks to our live video process, faster and more informed decisions can now be made.

We use stereo microscopes that are equipped with a microscope camera (up to 18MP) which is connected to a PC (e.g. the EuroQ Touch).  The camera provides a high image density, which can be digitally magnified. The digitized defect image can be recorded, magnified, measured, evaluated and documented.

We transmit the live image generated on the screen via Microsoft Teams to the customer anywhere in the world. In the live video call, we discuss the defect images and decide together with the customer how to proceed.

With flexible settings, team members can easily identify even the smallest defects, such as board damage, missing or defective solder joints, component positioning, and surface damage. In addition, multiple parts and defect images can be analyzed and evaluated in sequence.

Image quality is essential

When visual inspection is performed with stereo microscopes, their two eyepieces produce a three-dimensional image with a maximum magnification of 90x. They have an adjustable light source, which makes it easier to highlight contrasts and detect defects during inspection. More or less light is required depending on the object. Very dark or black parts may require more light intensity, while others may require a different light color. Since the adjustable light source usually comes from above, but additional light can be added from below using a backlight base.

EuroQ microscope inspection of electronic components

Three-dimensional visual inspection with stereomicroscopes

Stereomicroscopes have another advantage: For certain tasks, such as inspecting solder joints on printed circuit boards and SMD components, spatial vision is essential. Therefore, you need a three-dimensional image for inspection, which only a digital stereo microscope can provide.

EuroQ Touch delivers digital data for Pareto analysis

For all quality inspections, including visual inspections, we can provide our customers with specific data for resulting process improvements. For some components it is necessary to read the DMC (Data Matrix Code) or other codes or batch numbers to document the inspection. We do this using a scanner and the EuroQ Touch and document this data.

If the customer books the EuroQ Touch system in its full scope, we can also configure it directly with digital defect points. Our employees then record detailed information about the defect patterns digitally and without media discontinuity. The advantage for the customer: They receive prepared analyses, such as a Pareto analysis, in the shortest possible time.

We currently use stereomicroscopes in our test and logistics centers in Eisenach, Hanover and Bremen, where we also offer accompanying services such as transport, packaging and storage. In addition, the complete setup with test personnel, stereomicroscope, camera, notebook, etc. is also available as a mobile plug-and-play service for use at the customer’s site.

Would you like to know more about our microscope tests? We are looking forward to your inquiry!

EuroQ GmbH

Stedinger Straße 32
26723 Emden

+49 4921 91668-0
+49 4921 91668-18

EuroQ, Inc.

7800 Metro Parkway
Sterling Heights,
MI 48312 1054, USA

EuroQ Personal Solution GmbH

Stedinger Straße 32
26723 Emden

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