DEK高级培训资料 - 第173页
It is im portant that the fid ucials are set-up acc urate ly before the ‘th eta calibration ’ and ‘fidu cial capture’ Vision calibration Issue 2: July 2007 calibration ’ and ‘fidu cial capture’ are carried out
THE FOLLOWING IS CALCULATED
Vision calibration
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The number of pixels moved
•
The size of a pixel in video units
Issue 2: July 2007
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The size of a pixel in video units
•
The movement in y when x is moved
•
The movement in x when y is moved
•
The size of the graphic to be displayed
on the set up screen
It is important that the fiducials are
set-up accurately before the ‘theta
calibration’ and ‘fiducial capture’
Vision calibration
Issue 2: July 2007
calibration’ and ‘fiducial capture’
are carried out
Vision system locates and remembers Screen fiducial
position in x and y
STEP 1
Offset calibration
Issue 2: July 2007
CENTROID