Strip Finding Strategy 

version >= 53

The NUMBER of STRIP SEGMENTS is USER DEFINED
by the field [Max Strip Candidates] of the configuration

The DISTANCE between STRIP SEGMENTS is USER DEFINED
by the field [Strip Sampling Distance] of the configuration


Case 1: AUTOMATIC

this case is applied
 for a vertical strip if NOT manual Set X
 for a horizontal strip if NOT manual Set Y

[1] the first segment position is searched between the NOMINAL edge and the NOMINAL mark position along a LINE trajectory

if [1] is found:
    - search for a segment  at +   DISTANCE mm from the [1] in one of field of view
    - search for a segment  at -    DISTANCE mm from the [1] in one of field of view
    - search for a segment  at +2*DISTANCE mm from the [1] in one of field of view
    - search for a segment  at - 2*DISTANCE mm from the [1] in one of field of view
    - search for a segment  at +3*DISTANCE mm from the [1] in one of field of view
    - search for a segment  at - 3*DISTANCE mm from the [1] in one of field of view
until the required number of segments are searched for.

At least 2 FOUND segments are needed.


Example: 5 segments







Case 2: MANUAL SET

this case is applied
 for a vertical strip if manual Set X
 for a horizontal strip if manual Set Y


If the Mark Position is MANUALLY SET the strategy is to search the FIRST SEGMENT in ONE Field of View
and follow as automatic case.







Case 3: MANUAL SET both X and Y + SET FOUND

In this case NO segment search is perfomed and the Manual value of the mark coordinates is taken.

OLD VERSIONS

version 42b

THREE STRIP SEGMENTS ARE SEARCHED FOR:

Case 1: AUTOMATIC

[1] the first segment position is searched between the NOMINAL edge and the NOMINAL mark position along a LINE trajectory

[2] if [1] is found, the second candidate is searched +1mm from the [1] in one of field of view

[3] if [1] is found, the second candidate is searched -1 mm from the [1] in one of field of view

At least 2 FOUND segments are needed.

version <= 41

THREE STRIP SEGMENTS ARE SEARCHED FOR:

[1] the first segment position is searched 300 microns  from the NOMINAL edge along a LINE trajectory

[2] if [1] is found, the second candidate is searched 1mm from the [1] in one of field of view

[3] if [1] is found, the second candidate is searched 2mm from the [1] in one of field of view

At least 2 FOUND segments are needed.