Omron V530-R2000, Руководство пользователя

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108
V530-R2000
User’s Manual
SECTION 9
Appendix
Le
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a
nd Light
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SECTION 9
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Setting the Field of Vision and Working Distance
Use the following formula to calculate the field of vision and working distance.
(Code size: C) + 2
´
(Cell size: S) < (Field of vision: A) < 121
´
(Cell size: S)
Taking the positioning accuracy of the workpiece in account, set a suitable field of
vision.
Example: In this example, the code size is 3 mm and the symbol size is 12
´
12.
• Cell size: S = 3/12 = 0.25 mm
• Maximum field of vision: 0.25
´
121 = 30.25 mm
• Minimum field of vision: 3 + 0.25
´
2 = 3.5 mm
If the positioning accuracy is
±
5 mm, set the field of vision to from 13.5 mm to less
than 30.25 mm.
Effective number of
Camera pixels
512 (H)
´
484 (V)
Code size C (mm)
Symbol size M X M
Cell size S (mm) = C/M
Four pixels are required per cell.
A margin of about the size of one
cell is required.
Field of vision Max.: A (mm) = S/4
´
484
Min.: A (mm) = C + S
´
1
´
2
S
C
A