New Desktop AOI System Suits Lead-Free Production
-- Test & Measurement World, 11/21/2005 4:30:00 AM
The VT-RNS-ptH desktop AOI system, designed for off-line inspection by smaller manufacturers running low-volume or prototyping assembly lines, uses color-highlight technology to identify defects. Omron launched the fully automated, in-line inspection system at Productronica 2005.
The inspection algorithms used in the VT-RNS-ptH system are identical to the fully automated in-line machine. The system uses Omron's 3-color highlight system, which illuminates a target from all angles and all directions in a 360-degree dome. Dome illumination enables stable inspection, regardless of component placement directions or other angle designs. In high-density placement applications, the reflective luminosity of the solder surface is diminished by shadows of adjacent components. Red, green, and blue LEDs are arranged to provide target color measurements and limit the effect of fluctuations in the brightness of the solder surface. This eases inspection in lead-free production lines, where the solder surface is naturally duller in appearance.
The 3-CCD camera used by the VT-RNS-ptH system addresses one of the most difficult areas of inspection: solder shape recognition. By obtaining three times the information of a conventional camera, it is able to provide results with resolution levels to 10 microns.
