Specifications

Using Anchor
The Anchor provides Test Board-time position compensation for the solder
areas and lead areas. The use of anchor is necessary for inspecting solder
condition on the fine pitch leaded device with algoritmNo2 (AlgorithmNo1 is
self-anchored). To detect solder defect such as missing solder or lifted lead on
that fine pitch lead tip it is necessary to have the inspection box (ROI) "lock
on" to the lead tip position. This needs a position accuracy of about 1 Thou,
the positioning system of the AOI has an accuracy of about +/-3 thou. To get
needed accuracy, anchors used to provide compensation.
An anchor can locate the position of a reference on the frame and produce an
offset from its ideal position to its actual position. The offset is than used by
the solder or lead area under its coverage for position compensation.
User can add anchor from Device, Lead or Solder menu. After setting the size
of the anchor the following dialog appear for user to specify its parameters:
There is an anchor pop up menu: