Operation and Features
3-24 BASLER L304kc
Draft
The calculations below look at the outcomes of our two options:
Option 1
Calculate the conveyor movement that will generate seven encoder steps:
Calculate the magnification needed to make 1.75 mm of conveyor movement result in 90 µm
movement of the image:
β = 1 : 19.46
Calculate the width of conveyor that will be viewed by each sensor line at this magnification:
40.80 mm x 19.46 = 793.97 mm
Option 2
Calculate the conveyor movement that will generate eight encoder steps:
Calculate the magnification needed to make 2.0 mm of conveyor movement result in 90 µm
movement of the image:
β = 1 : 22.22
Calculate the width of conveyor that will be viewed by each sensor line at this magnification:
40.80 mm x 22.22 = 906.58 mm
If you choose to use seven encoder steps to move the image 90 µm, you will require a 1 : 19.46
magnification and at this magnification, the field of view of each sensor line will be 793.97 mm. If
you choose to use eight encoder steps to move the image 90 µm, you will require a magnification
of 1 : 22.22 and at this magnification, the field of view of each sensor line will be 906.58 mm. Since
our conveyor is 850 mm wide and since it is usually more acceptable to have a field of view slightly
larger than the conveyor, assume that we choose option 2.
7 steps 0.25 mm/step× 1.75 mm=
90 µm
1.75 mm
----------------------- 0.0514=
0.0514
------------------ 19.46=
8 steps 0.25 mm/step× 2.0 mm=
90 µm
2.0 mm
-------------------- .045=
0.045
---------------- 2 2 . 2 2=
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