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III- 22 Programming Manual Part III Inspection Algorithm 1.9.4 Setting Procedur e of Polarity Inspection Step1: Select a lighting that a polarity is visually clear from the Lighting drop-down list. Step2: Adjust the Rang…

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Programming Manual

Part III Inspection Algorithm

1.9.3 Setting Procedure of Shift Inspection

Step1: Select a lighting that displays the brightness level difference between OK and NG visually

clear from the Lighting drop-down list.

Step2: Make sure of the OK brightness level.

NOTE

Sample value is the brightness level range of the inspection window.

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㪐㪇

㪎㪇

㪏㪇㪏㪇

㪏㪇

㪎㪇㪎㪇

㪍㪇

㪎㪇

㪉㪉㪇

㪉㪋㪇㪐㪇

㪏㪇㪉㪈㪇

㪏㪇

㪉㪊㪇㪎㪇

㪉㪈㪇㪍㪇

Lead

OK Inspection Window

NG Inspection Window

Max Brightness

Level[90]

Minimum Brightness

Level[60]

Value[30]

Sample

Max Brightness

Level[240]

Minimum Brightness

Level[60]

Value[180]

Sample

Figure 1-24 Calculation of Sample Value

Step3: Make sure of the NG brightness level. Set the value in between the OK sample value and

the NG sample value as OK range.

Step4: Calculate a value intermediate between OK sample value and NG sample value.

CAUTION

Change the lighting if there is no difference between OK sample value and NG sample

value with default lighting.

0 255

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Intermediate Value

OK Sample Value NG Sample Value

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Figure 1-25 Calculation of Intermediate Value

Step5: If OK sample value is smaller than NG sample value, enter intermediate value in the

Upper ﬁ eld and 0 in the Lower ﬁ eld. If NG sample value is smaller than OK sample value,

enter 255 in the Upper ﬁ eld and intermediate value in the Lower ﬁ eld.

Step6: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step7: Press Inspect. Make sure that the inspection is completed properly.

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Programming Manual

Part III Inspection Algorithm

1.9.4 Setting Procedure of Polarity Inspection

Step1: Select a lighting that a polarity is visually clear from the Lighting drop-down list.

Step2: Adjust the Range inspection window position to surround the polarity mark.

Figure 1-26 Inspection Window for Polarity Inspection

Step3: Make sure that the sample value is in the OK range.

If it is out of OK range, adjust value in the Lower ﬁ eld.

NOTE

Sample value is the subtracted value between maximum and minimum brightness

level inside the inspection window.

Step4: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step5: Press Inspect. Make sure that the inspection is completed properly.

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Programming Manual

Part III Inspection Algorithm

1.9.5 Use of Average

Polarity inspections by using Average provide higher accuracy.

In case of SOP, the algorithm makes an inspection window on a point-symmetric point of a polarity mark.

It calculates brightness level differences between inspection windows to reduce the effect of dusts or

noises.

In case of QFP, the algorithm makes an inspection window on a point-symmetric point and line-symmetric

point of a polarity mark. It calculates brightness level differences between inspection windows.

Figure 1-27 Average (Polarity)

Parameter Description

Lighting

Select a lighting that the brightness level difference between the polarity and the

surface is visually clear.

Algorithm This inspection uses Average and Mem1-Mem2.

Shift[V1-V8]

This parameter is displayed only in Average. Enter the appropriate vector. Any value from V1

to V8 is available. Select the vector according to the Memorize to ﬁ eld of the Adjust window.

Memory1[M1-M8],

Memory2[M1-M8]

This parameter is displayed only in Mem1-Mem2. If SOP is inspected, enter M1 in

the Memory1 ﬁ eld and M2 in the Memory2 ﬁ eld. If QFP is inspected, make three

Mem1-Mem2 inspection windows. Enter M1 in the Memory1 ﬁ eld in three inspection

windows. Enter M2 in Memory2 in the ﬁ rst inspection window, M3 in Memory2 in the

second inspection window, and M4 in Memory2 in the third inspection window.

Memorize to

If SOP is inspected, enter M1 or M2 in two Average inspection windows to register the

brightness level. Mem1-Mem2 calculates M1 minus M2. If QFP is inspected, enter M1, M2,

M3, or M4 in four Average inspection windows to register the brightness level. Mem1-

Mem2 calculates M1 minus M2, M1 minus M3, and M1 minus M4.

Upper, Lower

Enter 255 in the Upper ﬁ eld and 0 in the Lower ﬁ eld of Average. If brightness level of

polarity is higher than brightness level of component body, enter 255 in the Upper ﬁ eld and

1 in the Lower ﬁ eld of Mem1-Mem2. If brightness level of polarity is lower than brightness

level of component body, enter -1 in the Upper ﬁ eld and -255 in the Lower ﬁ eld.

Table 1-10 Parameter of Average (Polarity)