Description:
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Total number of edge search passes made before reporting "cannot find edge"
error. The search distance is widened with each pass. Unless this is the first
plate from the bay after it has been loaded, the first pass is "esearch" mil
long, the second "wsearch" mil, the third 2 * "wsearch", etc. If this is the
first plate since the bay load, the first pass is "wsearch" mil, the second 2 *
"wsearch", etc.
Normally not changed from default. If the edge has not been found after the
search distance has been widened to at least 2 times wsearch, their is a problem
with edge detection (or wsearch is set incorrectly).
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