FCM_User Reference Manual.pdf.pdf - 第230页

Pr oduc t Ch ang e Ov er User Re f eren ce Manu al 4022 591 960 82 6-38 FCM M ult ifle x 02.02 ■ Sel ect with the tr a cker ball su ccessiv ely a spot with a repr esen tativ e gre y le v el in t he badmar k and one in th…

100%1 / 306
4022 591 96082 User Reference Manual
02.02 FCM Multiflex 6-37
Product Change Over
SCREEN 6-29
NOTE: For badmarks larger than the BVM camera’s field of view, the automatic
[Teach] function cannot be used.
When the [Teach] function cannot be used, the [Lightlevel] and [Threshold] of the
badmark must be set manually.
Before setting the threshold value for the binary algorithm, first the grey levels of
the badmark and its background have to be determined.
Proceed as follows:
■ Select
[Measure Greylevel] to determine the grey levels of the badmark and its
background
SCREEN 6-30
Product Change Over
User Reference Manual 4022 591 96082
6-38 FCM Multiflex 02.02
■ Select with the tracker ball successively a spot with a representative grey level
in the badmark and one in the background
SCREEN 6-31
■ Read the
[Average grey level in area] value
■ Use a value in between as the
[Threshold] level to be set
For fiducial-type badmarks:
■ Select
[Light Level and Threshold]
For a reliable badmark detection, the light level and threshold must have been set.
More information about there subjects can be found in the Vision General Manual,
ordering number 5322 871 69201.
SCREEN 6-32
4022 591 96082 User Reference Manual
02.02 FCM Multiflex 6-39
Product Change Over
NOTE: It is possible - but not recommended - to set the >/LJKW /HYHO@ and
>7KUHVKROG@ manually as in nearly all cases the correct settings will be
supplied automatically by selecting >7HDFK@.
Before setting the threshold value for the binary algorithm, first the grey levels of
the fiducial and its background have to be determined. Proceed as follows:
■ Select
[Measure Greylevel] to determine the grey levels of the fiducial and its
background
SCREEN 6-33
■ Select with the tracker ball and the sliders successively a spot with a repre-
sentative grey level in the fiducial and one in the background