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D-MAX DMC-20SEC Manual de usuario Pagina 35

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can be significantly improved with the help of macro optimization. In the first task, the pseudo
rate was reduced while slip-throughs remains zero (Table VIII, Fig. 10)
Real failures
[pieces]
Pseudo failures
[pieces]
4 4 672
Real failures
[pieces]
Pseudo failures
[pieces]
2 50
After optimization (30 days testing period)
Inspected components
(solder joints)
[pieces]
Detected failures [pieces]
Pseudo rate
[ppm]
223 006
(446 012)
52
224
Before optimization (30 days testing period)
4 676
Detected failures [pieces]
Pseudo rate
[ppm]
13 459
Inspected components
(solder joints)
[pieces]
347 130
(694 260)
Table 12. Results of macro optimization
Figure 27. Pseudo reduction
Automatic Optical Inspection of Soldering
http://dx.doi.org/10.5772/51699
421
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