Cable
For cable manufacturing and wire harness processing, providing visual inspection solutions for printing, appearance, wire sequence and terminal assembly.
Industry Production characteristics
How This Industry Produces Determines How Inspection Should Be Done
The visual inspection of cables revolves around two things: first, making the most common defects in this industry image clearly and consistently; second, connecting the judgement result reliably into the production line. Common implementation constraints in this industry are "continuous motion requires line scanning or stroboscopic freezing"; "the wire is a curved surface, so printed characters are distorted". Whether detection can be stable depends on material optical properties, minimum defect size, and cycle time, and is subject to the results of a measured sample trial.
The inspection objects in the cable industry are Long, flexible, continuous which is fundamentally different from the common "single workpiece" inspection: the workpiece is moving, its length far exceeds the field of view, and its shape can change.
Therefore, cable inspection typically uses Line scan or tracking capture In this approach, the acceptance criterion centers on "continuity along the length direction".
Industry Inspection issues
Where problems actually occur on site
- Missing printing, blurring, uneven spacing
- Insulation appearance defects (scratches, bulges)
- Incorrect wire sequence (harness assembly)
- Terminal crimping defect or missing terminal
- Length dimension deviation
Typical Inspection Objects
The Most Common Inspection Objects in This Industry
Typical Inspection Task
The judgments to be made on these objects
- Print presence/absence and content verification
- Insulation layer appearance check
- Wire Sequence Verification
- Terminal assembly inspection
- Length Measurement
Vision Inspection Challenges
Implementation constraints specific to this industry
- Continuous motion requires line scan or strobe freeze-frame
- Wire surface is curved, so printed characters are distorted
- Flexible parts have no fixed shape
- Wire harness branches are complex, making acceptance criteria hard to structure
Choosing the right algorithm
Choose by Acceptance Criteria Form, Not by How Advanced It Is
Line Scan + Continuity Judgement
Inspect printing and appearance along the length direction
OCR
Printed content recognition
Multi-region verification
Wire harness terminal and wire sequence
acquisition and light source
Optical conditions set the upper limit of feasibility
- Line-scan solutions require illumination and acquisition strictly synchronized with line speed
- For printing on curved surfaces, multi-angle illumination keeps it visible from every angle
- For wire harness inspection, fix the part with tooling before imaging
OK / NG Judgement
How results are judged and used
| Inspection Status | judgement | Interlocking Action |
|---|---|---|
| Printing, appearance, assembly OK | OK | release |
| Missing print or appearance defect | NG | Mark the position and trim as required |
| Wire sequence / terminal error | NG | Isolate and Rework |
PLC and Automation Interlocking
How results connect to the production line
Defects on continuous wire are best recorded Length and Position, making subsequent positioning for rejection or marking easier.
For wiring harness products, output the specific circuit number to make rework easier to locate.
Applicable equipment
Common configuration forms for this type of inspection
Related Solutions
View the corresponding solution by inspection task
Common Question
The Questions Most Often Asked in This Industry
How is wire inspected while running?
Line-scan cameras with synchronized illumination are usually used, or a strobe light source with an area-scan camera to freeze motion. Both approaches must solve the problem of "synchronizing motion and acquisition"; the specific choice depends on the line speed and the required resolution.
Can wire sequence errors be detected?
Yes; the approach is to recognize the color or wire number of each wire and then compare it with the correct wire sequence. Color recognition is affected by lighting and wire batch, so combining it with wire number sleeve recognition is recommended to improve reliability.
For visual inspection in this industry, what needs to be solved first?
the implementation constraints commonly seen in this industry center on: "continuous motion requires line scanning or strobe freezing"; "the wire is curved, so the print is deformed"; "flexible parts do not have a fixed shape". These constraints affect both the imaging solution and the cycle-time design, and normally a sample trial is needed to validate before the configuration is finalized.
How does the inspection result interlock with the production line?
For defects in continuous wire, we recommend recording the length position so that they can later be located for rejection or marking. For harness-type products, we recommend outputting the specific circuit number to make rework location easier.
What Equipment Configuration Does This Type of Inspection Generally Require?
Common forms include: "line scan inspection system", "wire harness terminal verification station", "inline inspection device that works with the haul-off equipment". The specific machine model and quantity depend on the inspection area, the minimum defect size and the line cycle time, and must be confirmed according to the site conditions.
Which process steps in this industry benefit most from a visual inspection station?
The most common is: "print presence/absence and content verification"; "insulation layer appearance check"; "wire sequence verification". Which process steps to actually instrument depends on the cost of defects escaping downstream and of rework — the later a defect is found, the higher the cost.
How do we judge whether our product is suitable for visual inspection?
Please provide samples of the wire / wire harness to be inspected and the wire sequence table, and state the line speed and the items that need to be inspected. In general, as long as the acceptance criteria can be stated clearly, defects image clearly and consistently, and the cycle time matches the field of view, the project is feasible.
What inspection accuracy can be achieved?
Accuracy is not a fixed value that holds regardless of conditions. To be added — the minimum detectable size depends on the combination of field of view and camera resolution, and is also affected by illumination, lens and algorithm; the configuration must be derived from your minimum defect size and validated by measurement.
Submit sample testing
Please provide the wire / wire harness samples to be inspected and the wire sequence table, and state the line speed and the items to be inspected.
Submitted successfully
We have received your sample testing request. A solution engineer will contact you within 1 business day via contact you.
Need to assess imaging conditions, defect criteria and cycle time item by item? Go to the Full Requirement Assessment →
Inspection Configuration Based on Your Industry's Products and Cycle Time
Send us photos of the workpiece, the inspection requirement (what to inspect, and the tolerance for escapes and false calls), and the line cycle time, and our solution engineers will recommend the inspection method, optical solution, and interlocking configuration for that industry.