Cognex Checker 101, Quick Reference

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Checker I/O Module
The optional Checker I/O Module (CKR-IOBOX-101) lets you switch between saved Checker jobs
and retrain Checker sensors while Checker is running. The Checker I/O Module also provides a
terminal block that lets you connect other devices to the standard Checker I/O lines. The following
figure provides an overview of the Checker I/O Module:
Working Distance and Field of View
The distance from Checker’s lens cover to your part is the working distance .; the field of view is
what Checker can see at that distance. Checker must be able to see enough of your part, and with
enough detail, to be able to check it. If the standard lens does not let Checker do this, an
inexpensive set of additional lenses is available from Cognex. The following tables show the range
of working distances and fields of view for the available lenses:
Optimizing Lighting
Checker's built-in lighting is optimized for working distances from 3” to 15" (75 mm to 375 mm).
Depending on how reflective your part is, you may need to use an external light for longer working
distances.
You can mount Checker at an angle to reduce highlights and reflections from reflective parts, as
shown below:
CO
G
N
E
X
Ch
e
c
ke
r
GROUND
POWER
COMMON
IN2
IN1
JOB CHANGE
JOB SEL3
JOB SEL2
JOB SEL1
JOB SEL0
IN 0 -
IN 0 +
E 1
E 0
OUT 1 -
OUT 1 +
OUT 0 -
OUT 0 +
GROUND
POWER
YELLOW
WHITE/YELLOW
ORANGE
WHITE/ORANGE
LIGHT BLUE
BROWN
GREY
WHITE/GREY
BLUE
WHITE/BLUE
BLACK
RED
PNP
NPN
Connect to Checker
Checker Input, Output, and Power Lines
Checker Job Control and Retrain Lines
Checker I/O Module
(color coded)
6.9 x 5.4 4.0 x 3.1 2.8 x 2.2 1.4 x 1.1
4.6 x 3.6 2.7 x 2.1 1.9 x 1.5 .91 x .71
2.3 x 1.8
1.3 x 1.0
.94 x .73 .46 x .35
9.2 x 7.1 5.3 x 4.1 3.8 x 2.9 1.8 x 1.4
13.9 x 10.7 8.0 x 6.2 5.6 x 4.4 2.7 x 2.1
18.5 x 14.3 10.7 x 8.2 7.5 x 5.8 3.7 x 2.8
23.1 x 17.9 13.3 x 10.3 9.4 x 7.3 4.6 x 3.5
Field of View (Width x Height)
30
24
18
12
9
6
3
192 x 149 111 x 86
78 x 61 38 x 29
115 x 89
67 x 51
47 x 36 23 x 18
58 x 45 33 x 26 24 x 18 11 x 9
308 x 238 178 x 137
125 x 97 61 x 47
462 x 357 266 x 206
188 x 146 91 x 71
616 x 476 355 x 275
251 x 194 122 x 94
770 x 595 444 x 343 314 x 243 152 x 118 1000
800
600
400
250
150
75
Working
Distance
(mm)
Working
Distance
(inches)
Field of View (inches)
16 mm lens 8 mm lens 5.8 mm lens 3.6 mm lens
Field of View (Width x Height)
(Standard)
16 mm lens 8 mm lens 5.8 mm lens 3.6 mm lens
(Standard)
Field of View (mm)
Reflective part
Reflective part
Direct Lighting (More Reflections) Angled Lighting (Fewer Reflections)