Machine Vision Lens for Electric Motor Stator and Rotor Inspection: How to Check Winding Position, Slot Alignment, Magnet Presence and Assembly Accuracy

Electric motor stator and rotor inspection is a demanding machine vision application because one assembly contains many repeated features arranged around a circular geometry. A stator can contain multiple slots, winding groups, insulation regions and coil positions, while a rotor can contain magnets, pole features, slots, holes and other repeated assembly elements. The complete motor component may need to remain visible in one image, yet the actual defect that determines acceptance can be a small winding displacement, one missing magnet, an incorrectly positioned slot feature or a subtle assembly offset. Selecting the correct machine vision lens for electric motor inspection therefore requires careful control of field of view, sensor resolution, working distance and pixels available to each repeated feature.

Buyers searching for machine vision lens for stator inspection, rotor inspection camera lens, motor winding inspection machine vision, rotor magnet inspection camera, stator slot inspection, electric motor assembly inspection lens or industrial camera lens for motor manufacturing are usually trying to solve a multi-feature optical problem. A lens must capture enough of the stator or rotor to establish its circular reference geometry while retaining enough spatial detail to evaluate every winding, slot or magnet position. A complete stator can look sharp on a monitor while the image still provides too few pixels per slot for reliable winding-position verification. For this reason, lens selection should be based on the smallest acceptable assembly variation rather than only the outside motor diameter.

Kyptec Automation® offers a broad Machine Vision Lens portfolio spanning multiple focal lengths and conventional 5 MP, 10 MP and 25 MP lens classes across different industrial camera formats. This breadth gives OEM machine builders and system integrators practical options for both whole-stator or whole-rotor coverage and tighter high-detail inspection of selected motor features. Current Kyptec Automation® product pages include 16 mm and 25 mm 10 MP options for compatible 2/3" systems, along with 25 MP larger-format choices for applications requiring greater total image sampling.

Start With the Smallest Motor Assembly Error That Must Be Rejected

Electric motor inspection can involve several levels of difficulty. Detecting a completely missing rotor magnet is generally easier than identifying a magnet that is present but slightly displaced. Confirming that a stator winding exists is easier than determining whether the winding bundle has moved too close to one slot edge. Recognizing the complete stator is easier than measuring whether one slot-to-slot relationship has shifted from the expected circular pattern.

The Machine Vision Lens should therefore be selected around the smallest winding, slot, magnet or assembly-position error that must reliably cause rejection. This prevents the inspection system from being qualified using obvious missing-component defects while remaining under-resolved for smaller production-limit deviations.

Whole-Stator Inspection Creates a Circular Resolution-Sharing Problem

A stator is fundamentally different from a simple rectangular inspection object because the critical features are distributed around a circular circumference.

If a stator contains many slots, each slot receives only a fraction of the available sensor pixels. The more slots that must be inspected in one image, the more important total optical resolution becomes.

For stator inspection machine vision, the design should therefore consider not only the outside stator diameter but also the number of slots, slot pitch and minimum positional variation within one slot.

Calculate Pixels per Millimetre Across the Required Stator FOV

A useful starting relationship is:

Pixels per millimetre = number of sensor pixels across the inspection direction ÷ physical field of view in millimetres

If 4,000 horizontal pixels cover a 200 mm stator field, simplified sampling is approximately 20 pixels/mm.

A 0.5 mm winding-position change would correspond to approximately 10 pixels.

If the same sensor is configured to cover 400 mm because excessive machine background is included, sampling drops to approximately 10 pixels/mm, and the same physical movement is represented by only about 5 pixels.

This is why minimizing unnecessary FOV is important when small stator or rotor features must be inspected.

Stator Slot Count Should Be an Optical Design Input

Two stators with the same outside diameter can create very different imaging requirements if one contains 12 slots and another contains 48.

With more slots, each slot occupies a smaller angular portion of the circumference.

If the system must verify winding placement within every slot, the Machine Vision Lens must provide sufficient local detail throughout the complete circular pattern.

Slot count should therefore be included alongside stator diameter, minimum feature size, working distance and camera resolution when selecting optics.

Winding Presence Is Easier Than Winding Position

A winding bundle can create a large visible region within the stator slot.

Detecting whether that winding exists can therefore be relatively straightforward.

Position inspection is more demanding because the system may need to determine whether the winding sits too far toward one slot edge, whether neighboring winding groups are unevenly positioned or whether the visible coil geometry varies from slot to slot.

For motor winding inspection, the smallest allowed displacement should drive the required image sampling.

Winding Position Should Be Referenced to Slot Geometry

If the entire stator shifts slightly inside a fixture, comparing winding coordinates with fixed camera pixels can produce false position differences.

A stronger inspection method is to establish the stator center and slot geometry first, then evaluate the winding relative to its local slot boundaries.

The Machine Vision Lens should therefore provide enough image information to identify both the winding feature and the stator structure used as its reference.

This makes the inspection less dependent on perfect whole-part placement.

Slot Alignment Can Be Evaluated Around the Complete Circumference

A stator slot pattern should follow the expected angular sequence around the motor center.

The vision system can locate the visible slot features and compare their angular or positional relationship with the expected circular pattern.

A single misaligned or malformed feature can then be distinguished from normal whole-stator rotation.

The optical system must preserve enough detail across the entire circular field, including features near the outer image region.

A 16 MM 10 MP Lens Can Support Broader Motor-Component Coverage

For compatible 2/3" industrial camera systems, the Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 16 mm focal length, 10 MP resolution, C-mount, 2/3" image format and an F2.8–16 aperture range. Kyptec Automation® lists the lens for industrial automation, automotive, electronics and related machine vision applications.

This focal-length class can be evaluated where a complete stator, complete rotor or a substantial portion of the motor component must remain visible. Final suitability depends on the sensor size, motor diameter, available working distance and the smallest slot or winding variation that must be resolved.

A 25 MM 10 MP Lens Can Provide More Controlled Stator or Rotor Framing

Where the motor component fits inside a tighter field, a 25 mm focal length can allocate more of the sensor to the actual inspection region.

The Kyptec Automation® Machine Vision Lens portfolio includes the Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens for compatible 2/3" systems. This type of configuration can be considered when stator or rotor coverage is still required but excessive surrounding machine area can be removed from the image.

Tighter legitimate framing increases pixels per millimetre and therefore improves the amount of image information available to each stator slot, rotor magnet or local assembly feature.

Rotor Magnet Presence Inspection Is a Repeated-Feature Verification Task

A rotor can contain multiple magnets arranged at known positions.

The inspection system may need to determine whether all expected magnets are present and whether the visible pattern matches the intended rotor configuration.

A missing magnet creates a relatively large difference, but magnet-position error can be much smaller.

The Machine Vision Lens should therefore be selected for the smaller position requirement if the same camera is expected to perform both presence and location verification.

Magnet Presence and Magnet Position Should Be Qualified Separately

A rotor can pass magnet-presence inspection even when one magnet is shifted from its expected position.

These are two different machine vision conditions.

Presence asks whether a feature exists. Position asks whether the feature center, boundary or visible reference remains within tolerance relative to the rotor geometry.

A system intended for rotor magnet inspection should therefore be validated using both missing-magnet samples and magnets placed near the maximum permitted positional deviation.

Rotor Center Should Be Established Before Measuring Magnet Position

If the rotor moves slightly within the inspection fixture, every magnet can shift in image coordinates.

The vision system should first determine the rotor center and orientation from stable features.

Magnet positions can then be measured relative to that coordinate system.

The Machine Vision Lens should therefore include the rotor references needed for alignment rather than cropping so tightly that only individual magnets remain visible.

Pole-to-Pole Spacing Can Reveal Assembly Pattern Errors

Where visible rotor features correspond to a repeated pole or magnet pattern, the system can compare adjacent angular spacing.

This can identify a localized feature that is incorrectly positioned even if the overall rotor is centered correctly.

For a large number of repeated features, the available sensor resolution is distributed around the circumference, making total image resolution increasingly important.

Larger Stators and Small Slot Features Create Opposing Requirements

A physically large stator requires a wide FOV.

A small winding or slot tolerance requires high pixels/mm.

These requirements work against each other.

If the complete stator must remain visible, reducing FOV may not be possible. In that case, increasing total camera and optical resolution can provide more samples across the same required physical field.

This is where higher-resolution Machine Vision Lens families can become valuable.

A 25 MP Lens Can Help Dense Stator and Rotor Patterns

For compatible larger-format systems, Kyptec Automation® offers the Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens. Its official product page specifies 25 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range.

A high-resolution configuration of this type can be evaluated where a complete motor component must remain visible while each slot, winding region or magnet still requires substantial spatial sampling.

The additional resolution is most valuable when it is concentrated on the stator or rotor rather than spent on unnecessary surrounding machine area.

High Resolution Should Increase Pixels per Slot

Moving from a lower-resolution system to a higher-resolution system should increase the information available to each repeated motor feature.

If the physical FOV is expanded at the same time, that benefit can be reduced.

The stronger approach is to establish the minimum legitimate stator or rotor field first, then use higher total resolution to increase pixels per slot, pixels per magnet and pixels per winding region.

This makes high-resolution optics more directly useful to the inspection task.

Rotor Outer Diameter and Magnet Radius Are Separate Measurements

A rotor can have the correct outside diameter while one magnet or pole feature lies at the wrong radial position.

The vision system can establish the rotor center, locate the magnet feature and calculate its radial distance from the center.

This inspection requires both the outer rotor reference and the magnet geometry.

A Machine Vision Lens that frames only the magnet may provide excellent local detail but insufficient information for true radial-position measurement.

Stator Inner Diameter Can Provide a Stable Circular Reference

In many stator inspection views, the internal opening provides a useful reference for establishing center and circular geometry.

Once the center is determined, slot and winding positions can be compared in polar coordinates.

This is particularly useful when the stator rotates slightly from one production cycle to another.

The lens should therefore preserve the relevant circular boundaries accurately enough for repeatable center estimation.

Slot-to-Center Relationships Can Detect Local Assembly Variation

Each slot can be evaluated relative to the stator center rather than only against neighboring slots.

This enables the system to compare radial distance, angular position and local winding placement.

A machine vision inspection can therefore separate whole-part rotation from one incorrectly positioned slot-related feature.

The optical requirement remains sufficient edge definition and enough pixels on every relevant slot.

Winding Overhang Can Require a Different Object Plane

Stator windings may project above or below the main lamination plane.

This creates an important optical consideration: the slot boundary and the visible winding may not lie at exactly the same distance from the camera.

If both features must remain sufficiently focused, the final Machine Vision Lens aperture and working distance should provide adequate usable depth for the full inspection region.

Focus should not be optimized only on the flat stator surface if the actual inspected winding feature sits at another height.

Winding Height Variation Can Affect Apparent Position

A winding that rises farther from the stator surface can appear laterally displaced in a perspective image, especially away from the optical axis.

Where winding-position tolerances are tight, the production system should control the stator presentation as much as practical.

The inspection algorithm should also reference winding geometry close to the slot where possible rather than relying only on unsupported coil sections farther from the lamination plane.

Aperture Should Balance Depth of Field and Fine Slot Detail

Stopping down the aperture can increase the range of object heights that remain acceptably focused.

However, excessively small apertures can reduce fine spatial detail through diffraction.

The aperture should therefore be qualified using the smallest actual winding-position, slot-edge or magnet-position difference across the expected motor-component height variation.

The best operating point is the one that preserves both usable depth and feature detail.

Circular Motor Components Must Be Qualified Across the Entire Image

A stator or rotor that fills most of the sensor extends into image regions far from the optical center.

Features near the top, bottom, left and right of the motor circumference are just as important as those nearer the image center.

The Machine Vision Lens should therefore be qualified using minimum rejectable defects at several angular positions.

Testing only one centrally convenient slot does not demonstrate complete motor inspection capability.

A 35 MM 1-Inch Lens Can Support Greater Camera Stand-Off

Motor inspection machines can contain winding fixtures, shaft supports, handling equipment or assembly tooling that limits where the camera can be mounted.

For compatible 1" systems, the Kyptec Automation® KL-1218 35 MM Machine Vision Lens With 10 MegaPixel & 1" Format Lens provides 35 mm focal length, 10 MP resolution, C-mount, 1" image format and an F1.4–16 aperture range.

This focal-length class can be considered where a stator, rotor or selected motor feature must be inspected from additional stand-off because closer camera placement is mechanically difficult.

Local Slot or Magnet Inspection Can Benefit From Longer Focal Lengths

Not every motor inspection station needs to capture the complete stator or rotor.

A dedicated station may inspect one winding region, one group of slots or a localized rotor magnet area.

In such cases, tighter optical framing can devote substantially more pixels to the critical feature.

Where sufficient working distance is available, a longer focal length can provide high-detail local inspection without spending resolution on the complete motor component.

A 50 MM 25 MP Lens Can Support Local High-Detail Motor Inspection

For compatible larger-format systems requiring tighter high-resolution inspection, the Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 50 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range.

This type of configuration can be evaluated where one stator slot group, winding region or rotor magnet section should occupy a larger portion of the sensor and full-component coverage is unnecessary.

Magnet Spacing Should Be Evaluated in the Rotor Coordinate System

A rotor may rotate freely or arrive at slightly different angular orientations.

If the inspection measures magnet positions directly against fixed image coordinates, normal rotor rotation can look like an assembly error.

The system should instead establish the rotor orientation and then compare the relative magnet pattern.

The Machine Vision Lens should provide enough visible rotor geometry for this coordinate transformation.

Missing Magnet Detection Should Include Outer Image Positions

A missing magnet is generally a large-feature defect, but the inspection must still work consistently around the entire rotor.

If magnet visibility or local sharpness changes significantly near the edge of the usable field, one angular position may become less reliable than another.

Qualification should therefore place representative missing and displaced magnet conditions at several rotor positions.

Stator Winding Consistency Can Be Compared Slot by Slot

Repeated stator geometry provides a useful inspection advantage because neighboring slots can act as references.

The system can compare winding occupancy, centroid position or visible geometry across equivalent slots.

A local outlier can then be identified even when the overall component remains correctly assembled.

The Machine Vision Lens should provide consistent image detail around the complete circumference for this comparison to remain meaningful.

Assembly Accuracy Can Include Stator-to-Housing Position

Some motor production stages may require verification that a stator sits correctly relative to an outer housing or assembly reference.

This is different from inspecting the stator itself.

The image must include enough housing geometry and stator geometry to establish their relative position.

A very tight crop of only the stator can therefore be unsuitable if the actual production requirement is stator-to-housing alignment.

Rotor-to-Shaft Alignment Requires the Necessary Reference Features

Where visible geometry allows rotor position to be compared with a shaft or central mounting reference, the vision system can evaluate relative centering.

The Machine Vision Lens should include both features in one coordinate system.

This is another example where a slightly larger but carefully controlled FOV can be more useful than maximum magnification on one isolated rotor feature.

Multiple Motor Sizes Need Independent FOV Calculations

An OEM machine may need to inspect several stator or rotor diameters.

The largest motor component may determine the maximum required FOV, but smaller motors can then occupy substantially less sensor area.

If the smaller motor also contains finer slot pitch or smaller magnets, it may actually become the more demanding optical case.

Each motor family should therefore be evaluated independently for outside diameter, slot count, feature size and minimum acceptable position error.

Digital Zoom Cannot Restore Missing Slot or Winding Information

Software enlargement can make one winding or magnet appear larger on the display, but it cannot create additional physical image information.

If a winding-position error occupies only a few original sensor pixels, enlarging that crop does not produce the same inspection capability as genuinely tighter optical framing or higher physical resolution.

Lens selection should therefore establish sufficient sampling before software processing begins.

Production Qualification Should Use Real Limit Samples

A completely missing magnet or dramatically displaced winding is useful for early system setup but is not sufficient for production qualification.

Final validation should include minimum allowable and rejectable winding displacement, small slot-position errors, slight magnet displacement and other conditions close to the actual production limit.

These samples should be tested at different angular positions across the stator or rotor so the complete Machine Vision Lens field is validated.

Why Kyptec Automation® Is a Practical Choice for Electric Motor Stator and Rotor Inspection

Kyptec Automation® provides a broad Machine Vision Lens collection covering multiple focal lengths and conventional 5 MP, 10 MP and 25 MP resolution classes across different industrial camera formats. The current portfolio supports both wider motor-component imaging and tighter high-detail inspection approaches, allowing OEMs and system integrators to select optics according to stator diameter, rotor diameter, slot count, feature size, working distance and camera format.

For compatible 2/3" systems, the Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides a broader 16 mm, 10 MP option for applications where more of the stator or rotor must remain visible. Where tighter framing and greater pixels per local motor feature are desirable, the 25 mm focal-length class can be evaluated according to the actual motor geometry.

For compatible larger-format high-resolution systems, the Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a 25 MP, 25 mm C-mount option with an F2.8–22 aperture range. Where machine geometry requires additional stand-off, Kyptec Automation® KL-1218 35 MM Machine Vision Lens With 10 MegaPixel & 1" Format Lens provides a 35 mm option for compatible 1" systems, while localized high-detail inspection can be evaluated using Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens for compatible larger-format systems.

This range gives motor-inspection OEMs practical flexibility to select a Kyptec Automation® Machine Vision Lens around actual stator and rotor dimensions rather than relying on one general-purpose focal length for every motor production stage.

Frequently Asked Questions About Machine Vision Lenses for Electric Motor Stator and Rotor Inspection

1. What is the best Machine Vision Lens for stator inspection?

The correct Machine Vision Lens depends on stator diameter, number of slots, smallest winding-position tolerance, sensor size, camera resolution and working distance. A complete stator inspection generally requires enough FOV for the full circular component, while localized slot inspection can use tighter framing. Kyptec Automation® provides multiple focal lengths and conventional 10 MP and 25 MP options that allow the optical setup to be matched to actual stator geometry rather than focal length alone.

2. How much resolution is required to inspect motor windings?

Resolution should be determined from the smallest winding displacement or visible winding feature that must be rejected. Calculate pixels/mm from the final stator FOV and determine how many pixels represent that displacement. A winding can appear clearly present while a small positional error still occupies too few pixels for reliable classification, so winding-position tolerance is more useful than overall coil size for lens selection.

3. Can machine vision detect a missing stator winding?

Yes, when the expected winding region is visible in the inspection view. Missing-winding detection is usually a relatively large-feature inspection compared with small winding-position errors. If the system must perform both presence and position verification, the Machine Vision Lens should be selected according to the tighter positional requirement.

4. How can machine vision check whether a winding is correctly positioned inside a stator slot?

The system can first locate the stator center and slot boundaries, then compare the visible winding geometry with its corresponding slot. This allows winding position to be measured relative to the stator rather than fixed camera coordinates. The lens must therefore provide enough detail on both the winding and slot reference.

5. Can machine vision inspect all stator slots with one camera?

Yes, when the complete stator fits inside the FOV and each slot still receives sufficient spatial sampling. As slot count increases, every individual slot receives fewer sensor pixels. Large-diameter, high-slot-count stators can therefore benefit from higher total image resolution if whole-stator coverage is required.

6. Is a 16 mm Machine Vision Lens suitable for stator and rotor inspection?

It can be when the resulting FOV matches the motor component. For compatible 2/3" systems, Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 16 mm focal length, 10 MP resolution, C-mount and an F2.8–16 aperture range. Final suitability should be calculated from actual sensor size, stator or rotor diameter and working distance.

7. How can machine vision detect a missing rotor magnet?

The system can compare the visible rotor magnet pattern with the expected number and positions of magnets. A missing magnet usually creates a larger visual difference than a small positional error. The lens should nevertheless provide adequate detail throughout the full rotor circumference so missing-magnet inspection remains reliable at every angular position.

8. Can the same vision system detect both missing and misaligned rotor magnets?

Yes, provided the optical resolution satisfies the more demanding position requirement. Presence inspection asks whether the magnet exists, while alignment inspection measures whether its center or boundary lies within tolerance relative to the rotor. The Machine Vision Lens should therefore be selected according to minimum permissible magnet displacement.

9. When should a 25 MP Machine Vision Lens be considered for motor inspection?

A 25 MP configuration becomes particularly useful when the complete stator or rotor must remain visible while many small repeated features need substantial spatial sampling. Kyptec Automation® offers the Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens for compatible larger-format systems, providing 25 mm focal length, 25 MP resolution, C-mount and F2.8–22 aperture range.

10. Why can a system detect a missing magnet but fail to detect a slightly shifted magnet?

A missing magnet produces a large difference in the expected rotor pattern. A small magnet displacement may correspond to only a few sensor pixels. The second inspection therefore requires much greater spatial sensitivity. FOV and resolution should be selected around the smallest acceptable magnet-position variation rather than missing-magnet detection alone.

11. Does the number of stator slots affect Machine Vision Lens selection?

Yes. As slot count increases, each slot occupies a smaller portion of the complete stator image. If all slots must remain visible simultaneously, the Machine Vision Lens and camera need enough total resolution for each slot to retain sufficient detail. Slot count, slot pitch and stator diameter should therefore all be included in the optical design.

12. Can a 35 mm Machine Vision Lens help when the camera must be installed farther from the motor?

Yes. For compatible 1" systems, Kyptec Automation® KL-1218 35 MM Machine Vision Lens With 10 MegaPixel & 1" Format Lens provides 35 mm focal length, 10 MP resolution, C-mount and F1.4–16 aperture range. This focal-length class can be evaluated where motor fixtures, shafts or assembly tooling restrict close camera placement.

13. Can a 50 mm Machine Vision Lens be used for detailed stator slot or rotor magnet inspection?

Yes, when only a localized motor region needs inspection and sufficient working distance is available. Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 50 mm focal length, 25 MP resolution, C-mount and F2.8–22 aperture range for compatible larger-format systems. Tighter framing can devote substantially more sensor pixels to selected winding, slot or magnet features.

14. Does stator winding height affect inspection accuracy?

It can. Windings may project above the lamination plane, so the winding and slot boundaries can lie at different object distances. This can affect focus and apparent projected position. The final aperture and working distance should therefore be qualified across the expected winding-height range.

15. Can machine vision check rotor magnet spacing?

Yes. After the rotor center and orientation are established, the system can locate repeated magnet features and compare their angular or linear spacing with the expected pattern. The Machine Vision Lens should provide adequate edge definition and enough resolution around the complete rotor circumference for consistent position estimation.

16. What information should I provide before buying a Machine Vision Lens for motor inspection?

Provide stator or rotor outside diameter, stator inner diameter where relevant, slot count, approximate slot dimensions, minimum winding-position tolerance, rotor magnet dimensions, number of magnets, smallest acceptable magnet displacement, camera sensor format and resolution, available working distance and whether the entire motor component or only a localized region must fit inside one image. These parameters allow a Kyptec Automation® Machine Vision Lens to be evaluated from actual FOV and pixels per feature.

17. Where can I compare Kyptec Automation® Machine Vision Lenses for stator and rotor inspection?

The Kyptec Automation® Machine Vision Lens collection provides multiple focal-length and resolution options for industrial machine vision systems. Relevant current product choices include 10 MP and 25 MP lens families with different sensor-format and focal-length combinations, allowing OEM machine builders to compare broader whole-motor views with tighter high-detail inspection configurations.

Design Motor Inspection Around the Smallest Repeated Feature, Not Only the Motor Diameter

Reliable electric motor stator and rotor inspection requires recognizing that complete-component presence, winding verification, slot alignment, magnet presence and small assembly-position errors operate at different physical scales. A complete stator can look sharp while one winding-position variation remains inadequately represented. Likewise, every rotor magnet can be visible while a small magnet offset remains below the useful resolution of the optical system.

The strongest optical design begins with stator or rotor diameter, slot or magnet count, minimum winding or magnet-position tolerance and the number of features that must remain visible simultaneously. The minimum legitimate FOV is then established, pixels per millimetre are calculated from camera resolution, and focal length, sensor format and working distance are selected so the motor component uses the sensor efficiently. Final qualification should include minimum rejectable winding and magnet-position errors at several angular locations rather than only obvious missing-component defects.

Kyptec Automation® provides a comprehensive Machine Vision Lens portfolio with multiple focal lengths and conventional 5 MP, 10 MP and 25 MP resolution classes for industrial camera systems. Current verified examples include the Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens, Kyptec Automation® KL-1218 35 MM Machine Vision Lens With 10 MegaPixel & 1" Format Lens, Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens and Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens. By matching the appropriate Kyptec Automation® Machine Vision Lens to motor diameter, slot density, winding geometry, magnet dimensions, sensor format and machine working distance, OEMs and system integrators can build a stronger optical foundation for automated stator inspection, winding-position verification, slot alignment analysis, rotor magnet inspection and electric motor assembly quality control.