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56

Wire & Cable ASIA – July/August 2016

www.read-wca.com

Reduced defects

: The system can provide the operator

with a view of current surface images as well as both

the most recent defects with defect dimensions and the

current cable diameter.

This continuous stream of real-time information –

especially failure data – allows the operator to isolate the

causes of wrap imperfections. Identifying when and how

a defect occurs will allow the technical staff to learn the

root cause of defects and reduce their occurrence.

Quality assurance

: The system will continuously monitor

the wrapping of the cable for both overlap distance and

wrapping angle, and the measurements can be recorded

for later analysis. Images of wrapping and surface defects

are captured and saved to a hard disk for use in quality

reports.

The wrap inspector system’s display makes it easy for

engineering and production supervisors to examine

potential defects without having to see the defect on the

actual cable itself.

Defect images are saved together with location information

allowing operators to quickly find and eliminate defects

before they reach customers or fail in the field.

3.3 Limitations

There are a few limitations to the wrap defect inspection

system:

• Sometimes significantly different wrapping types will

require adjustment to the optical setup or software

changes

• Since the camera is looking at the surface, water

droplets/grease/dust particles will be detected as

defects by the system. Generally, this can be fixed

with a well-placed air wipe. Alternatively, the system

sensitivity can be decreased, which may result in some

of the smaller defects passing through the filter

3.4 Test Results

The wrap defect inspection system is a modified

version of the surface inspection system that is used in

numerous production lines around the world to detect

surface defects on wire and cable. Some sample images

of defects and wrap measurements can be seen in

Figures

1

to

6

.

4 Conclusions

With a wrap defect inspection system, imperfections in

the wrapped cable surface will be detected and the cable

will be wrapped correctly to show overlap distance and

angle.

The system provides several benefits:

• Suitable for any type of wrapped wire/cable and

convoluted armouring

• Ensure the customer will not get defective products,

improving customer relationship and confidence

• Reduce rework and eliminate cable waste resulting in

material cost and labour cost

• Assist in internal improvement to production process to

reduce defects

• Ensure cable overlap

Paper courtesy of the 64

th

IWCS Technical Symposium,

Atlanta, Georgia, USA, November 2015.

Craig Girdwood and

Andrew McCloskey,

Taymer International Inc

Markham, Ontario

Canada

Tel

: +1 905 479 2614

Email

:

craig.girdwood@taymer.com

Website

:

www.taymer.com