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Automated Visual Inspection of Lead
Surface
mount components such as IC chips usually require 100
percent inspection prior to automatic insertion. Automated Visual
Inspection to determine bent or missing leads and
measurement of the lead separation width is necessary to
ensure defect free products. A Smart Vision Sensor has
been designed for such applications.
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JANUARY 12, 2006 (ASIA PACIFIC) - Automated visual inspection works
in place of the human eye to perform complicated and accurate
inspections by processing images using cameras at high speeds.
With the current market demands for variable-product production
with improved product quality, having a highly effective
inspection system is inevitable.
Surface mount components usually
required 100 percent inspection prior to automatic insertion.
Surface mount applications require precise positioning of all
components due to the small size of leads and pitch. These
delicate leads bend and break easily.
Inspection requirements usually
include the following:
Lead presence is verified by
counting the number of edges found across the part's length.
Lead separation can be confirmed by pattern matching. Bent and
missing leads can be detected via width and count function.
Omron's ZFV smart sensor provides
seven high-level matching capabilities (shape, brightness, text,
position, area, width and number) for a wide range of
applications that is easy to implement and cost effective. The
high-speed vision sensor includes built-in lighting and an
amplifier with embedded LCD monitor that provides real-time
grayscale measurement displays to show good and bad parts at a
glance. Production settings can be updated for fast changeover
with minimum downtime.
The ultra-high speed response is
best used in fast-moving production lines. With a
four-millisecond response time, ultra fast inspections can be
carried out at up to 10,000 parts per minute. Pattern matching
function is used to search for the OK pattern and differentiate
from the NGs while the width function is able to measure widths
between leads. The count function enables counting of the number
of leads from the IC chips. This is also applicable to
applications like counting of connector pins. Hence,
bent/missing leads can be differentiated and filtered out. The
Omron ZFV-SR10 provides a narrow view with focus adjustment
enabling sensing of small work pieces like IC chips.
For more information about
automated visual inspection, please refer to:
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