BM-500CL / BB-500CL
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6.3.4.
Partial Scan
Partial scan allows higher frame rate by reading out a smaller center portion of the image. This is
particularly useful when inspecting objects that do not fill the whole height of the image.
Full scan
Partial scan
Vertical Timing
The below diagram and table provide vertical timing information for the fixed partial scan settings
1/2, 1/4, 1/3 and 2/3
Values for vertical timing in partial scan continuous mode.
AREA
FVAL Low
(L)
A
(L)
B (L)
C
(L)
Total line
(L)
frame rate
(L)
Start line
End line
1/2
4
176
1030
93 L
1303 L
23.93
515
1544
1/4
4
262
514
136 L
918 L
34.04
773
1286
1/8
4
304
258
158 L
724 L
43.07
901
1158
2/3
4
118
1374
65 L
1561 L
19.97
343
1716
Remark! The color sequence for BB-500CL differs in partial scan. Refer to chapter 6.1.7.
Fig. 16. Vertical timing for partial scanning
Fast-dump period
Fast-dump period
Normal scan period