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V400-F050/250/350
User’s Manual
Appendix
Setting the Field of Vision and Working Distance
Refer to 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)
Set an appropriate field of vision with workpiece positioning accuracy taken into
account.
Example: When the code size is 3 mm and the symbol size is 12 × 12
• Cell size: S = 3/12 = 0.25 mm
• Max. field of vision: 0.25/4 × 480 = 30 mm
• Min. field of vision: 3 + 0.25 × 1 × 2 = 3.5 mm
If the positioning accuracy is ±5 mm, the field of vision must be set between
13.5 mm or higher and below 30 mm.
Number of effective
pixels of camera
640 (H) × 480 (V)
Code size
C (mm)
Symbol size
M × M
(Cell size)
S (mm) = C/M
4 pixels/cell required
A margin for one cell is required.
Field of vision
Max.: A (mm) = S/4 × 480
Min.: A (mm) = C + S × 1 × 2
S
C
A
Summary of Contents for 2D CODE READER
Page 1: ...USER S MANUAL 2D Code Reader V400 F050 250 350 Cat No Z242 E1 03...
Page 13: ...12 Introduction Contents V400 F050 250 350 User s Manual Introduction MEMO...
Page 85: ...84 Section 6 Troubleshooting V400 F050 250 350 User s Manual Section 6 Troubleshooting MEMO...
